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Solutions Search - Automotive Power & Lighting Solutions

LT8672 12V, 5A Automotive Reverse Battery Protection

Oct 6th 2017
The LT®8672 is an active rectifier controller for reverse input protection. It drives an external N-channel MOSFET to replace a power Schottky diode. Its very low quiescent current and fast transient response meet the tough requirements in automotive applications where AC input signals of up to 100kHz are present. These ...

Circuit LTspice 

 

LTspice Models of ISO 7637-2 & ISO 16750-2 Transients

Dan Eddleman - Senior Applications Engineer Apr 5th 2017
Introduction Simulating the ISO 7637-2 and ISO 16750-2 transients early in the design phase of an automotive product can pinpoint issues that would otherwise come to light during electromagnetic compatibility (EMC) testing. If a product fails EMC testing, hardware modifications are required, project schedules suffer, and extra ...

Blog Post LTspice 

 

LT3598 Auto Battery Powered Driver for 20 LEDs with 90mA Each String

Oct 5th 2016
The LT3598 is a fixed frequency step-up DC/DC converter designed to drive up to six strings of LEDs at an output voltage up to 44V. LED dimming can be achieved with analog dimming on the CTRL pin, and with pulse width modulation dimming on the PWM pin. The LT3598 accurately regulates LED current even when the input voltage is ...

Circuit 

 

LT3755 Buck-Boost LED Driver for Automotive

Sep 6th 2016
The LT3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current mode architecture results in stable operation over a wide range of ...

Circuit 

 

LT3756 30W White LED Headlamp Driver with Thermal Derating

Sep 6th 2016
The LT3756, LT3756-1 and LT3756-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of ...

Circuit 

 

DC2247A - LT3922 Demo Board | Sync Boost LED Driver, 4V ≤ VIN ≤ 28V, VLED = 34V @ Up to 330mA, 2MHz fSWITCH

Aug 25th 2016
Demonstration circuit DC2247A is a synchronous 2MHz boost LED driver featuring the LT3922. The LT3922 features a low EMI Silent Switcher architecture and an optional spread spectrum frequency modulation (SSFM) that further reduces EMI. It has a 2A/36V internal power switch, but the demo board has been configured to use a 4V ...

Demo Board LTspice 

 

LTspice: Using Time-Dependent Exponential Sources to Model Transients

Mitchell Lee - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
May 15th 2016
When working with Surge Stoppers or Hot Swap Controllers, occasionally there is a need to simulate a circuit's behavior with a specified voltage or current transient. These transients are usually modeled using a double exponential waveform characterized by a peak voltage, a rise time (usually 10%–90%), a fall time to 50% ...

Blog Post LTspice 

 

DC2345A - LT8391EFE Demo Board | Sync Buck-Boost LED Driver, 4V ≤ VIN ≤ 60V, VLED = 25V @ 2A

May 9th 2016
Demonstration circuit 2345A is a 60V synchronous 4-switch buck-boost LED controller with spread spectrum featuring the LT®8391 LED driver. It accepts an input voltage from 4V to 60V and drives a single string of LEDs up to 25V at 2A. DC2345A runs at 400kHz switching frequency without spread spectrum, but spread spectrum ...

Demo Board LTspice 

 

LTC7813 Wide Input Range to 12V/8A Low IQ Cascaded Boost+Buck Regulator (VMID = 14V)

Mar 16th 2016
The LTC®7813 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

LTC7813 Wide Input Range to 5V/8A Low IQ Cascaded Boost+Buck Regulator (VMID Boosted to 10V)

Mar 16th 2016
The LTC®7813 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

LTC7813 Wide Input Range to 24V/5A Low IQ Cascaded Boost + Buck Regulator (VMID = 28V)

Mar 16th 2016
The LTC®7813 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

LTC7813 Low EMI, Wide Input Range Pass-Through Cascaded Boost+Buck Regulator

Mar 16th 2016
The LTC®7813 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

LT8601 Automotive Input Steps Down to 5V, 3.3V, 1.8V

Feb 1st 2016
The LT®8601 is a triple channel, current mode, monolithic buck switching regulator with a programmable power-on reset. All regulators are synchronized to a single oscillator with an adjustable frequency from 250kHz to 2.2MHz. The LT8601 can be configured for micropower Burst Mode or Pulse-Skipping operation at light load. ...

Circuit 

 

DC2218A - LT3965EFE/LT3797 Demo Board | 2-String Buck LED Driver with Matrix LED Dimmer; 9V ≤ VIN ≤ 30V, Up to 30VLED @ 500mA (8 LEDs/String)

Dec 16th 2015
Demonstration circuit DC2218A is a matrix LED dimmer system featuring the LT3965 8-switch matrix LED dimmer IC. There are 16 500mA LEDs that can be individually turned on, off, or PWM dimmed with two 8-switch LED dimmer LT3965 ICs. The two strings of LEDs are driven with two buck LED driver outputs of the LT3797 triple LED controller ...

Demo Board 

 

LTC3643 12V Backup System for Automotive Applications

Nov 4th 2015
The LTC®3643 is a bidirectional synchronous step-up charger and step-down converter which efficiently charges a capacitor array up to 40V from an input supply between 3V to 17V. When the input supply falls below the programmable power-fail threshold, the step-up charger operates in reverse as a synchronous step-down regulator ...

Circuit 

 

LTC7812 Wide Input Range to 12V/8A Low IQ, Cascaded Boost+Buck Regulator (VMID = 16V)

Oct 9th 2015
The LTC®7812 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

LTC7812 Wide Input Range to 5V/5A Low IQ Cascaded Boost + Buck Regulator (VMID Boosted to 10V)

Oct 9th 2015
The LTC®7812 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

LTC7812 Low EMI, Wide Input Range Pass-Through Cascaded Boost+Buck Regulator

Oct 9th 2015
The LTC®7812 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that ...

Circuit 

 

DC2176A - LT3909EDD Demo Board | 2-String Boost LED Driver, 7V ≤ VIN ≤ 36V, VLED up to 35V @ 50mA (x2)

Sep 29th 2015
Demonstration circuit 2176A features the LT®3909, a 2-string × 50mA, 2MHz step-up LED driver with ±1.8% current matching. The LT3909 precisely regulates two LED strings for equal current, supports LED dimming that reduces brightness down to a 1/40,000 ratio, protects against faults and also reports faults. The ...

Demo Board LTspice 

 

LT3761 94% Efficient Boost LED Driver for Automotive Headlamp with 25:1 PWM Dimming

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

DC2361A - LT3952EFE Demo Board | 2MHz LED Driver, 8V ≤ VIN ≤ 28V, IOUT = 330mA at 40V

Jun 8th 2015
Demonstration circuit DC2361A is a 2MHz 60V LED driver with internal 4A switch featuring the LT3952 monolithic LED driver. It accepts an input voltage from 8V to 28V (with transient to 36V) and boosts to a single string of LEDs up to 40V at 330mA. DC2361A features an integrated 4A switch, constant current and constant voltage ...

Demo Board 

 

DC2013A - LT3952EFE Demo Board | CC/CV Boost LED Driver, 5V ≤ VIN ≤ 36V, VLED = VIN up to 50V @ 330mA

Apr 30th 2015
Demonstration Circuit DC2013A is a 60V LED driver with internal 4A switch featuring the LT®3952 monolithic LED driver. It accepts an input voltage from 5V to 36V (with transient to 42V) and boosts to a single string of LEDs up to 50V LEDs at 330mA. DC2013A features an integrated 4A switch, constant-current and constant-voltage ...

Demo Board LTspice 

 

LT8610AC 5V 2MHz Step-Down Converter

Apr 7th 2015
The LT®8610AC is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Compared to the LT8610AB, the LT8610AC has a lower feedback voltage of 800mV and a lower minimum VIN of 3V. The LT8610AC has the same additional features of the LT8610AB ...

Circuit LTspice 

 

LT6703 μPower Supply Voltage Monitor with 2V Hysteresis

Mar 17th 2015
The LT6703 µPower, low voltage comparator and reference offers a single comparator and accurate reference in a 2mm × 2mm DFN package. The -3 version is has a non-inverting input. Although only one of its comparator inputs is accessible (the other is connected to a 400mV internal precision voltage reference) its size ...

Blog Post Circuit LTspice 

 

DC2339A - LT3744 Demo Board | Sync Buck LED Driver, 5.5V ≤ VIN ≤ 24V, Drives 3 LEDs @ up to 20A Each

Mar 9th 2015
Demonstration circuit 2339A is a high current synchronous step-down LED driver featuring the LT®3744. The unique drive stage used on the LT3744 allows the anodes of three LEDs to be connected together for better heat sinking in both the step-down configuration and the inverting buck-boost configuration (shown in a separate ...

Demo Board LTspice 

 

LTC3890 & LTC4000 60V Input DC/DC Power Supply with Battery Backup

Victor Khasiev - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 27th 2015
Introduction Circuitry presented in this article can be very useful for designing compact power supplies and extremely beneficial for system functioning in conditions of input power interruptions. The presented solution can be embedded into uninterruptible power systems or small standalone modules. It can be successfully employed ...

Blog Post Circuit LTspice 

 

LTC7860 3.5V to 60V Input, 12V/18V Maximum 5A Output at 535kHz

Feb 24th 2015
The LTC®7860 high efficiency surge stopper protects loads from high voltage transients. High efficiency permits higher currents and smaller solution sizes. During an input overvoltage event, such as a load dump in vehicles, the LTC7860 controls the gate of an external MOSFET to act as a switching DC/DC regulator (PROTECTIVE ...

Circuit 

 

LTC3810 - High Efficiency Switching Surge Stopper

David Burgoon - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 23rd 2015
The LTC®3810 high efficiency input limiter protects its load from excessive input voltage. At normal input voltages (<60V), it operates open loop at a very high duty cycle (>95%) to pass the input to the output at up to 5A with minimal voltage drop. When the input rises to an undesirable point (up to 75V), the ...

Blog Post Circuit LTspice 

 

LT8570-1 12V Battery Stabilizer Survives 40V Transients

Feb 2nd 2015
The LT®8570 and LT8570-1 are PWM DC/DC converters. The LT8570 contains a 0.5A, 65V power switch, while the LT8570-1 contains a 0.25A, 65V power switch. The LT8570 and LT8570-1 can be configured as either a boost, SEPIC or inverting converter. ...

Circuit 

 

LT8570 12V Battery Stabilizer Survives 40V Transients

Feb 2nd 2015
The LT®8570 and LT8570-1 are PWM DC/DC converters. The LT8570 contains a 0.5A, 65V power switch, while the LT8570-1 contains a 0.25A, 65V power switch. The LT8570 and LT8570-1 can be configured as either a boost, SEPIC or inverting converter. ...

Circuit 

 

LTC7138 5V to 140V Input to 5V Output, 400mA Step-Down Regulator

Jan 14th 2015
The LTC®7138 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. ...

Circuit 

 

LTC7138 4V to 90V Input to 12V/800mA Output Regulator with Overvoltage Lockout

Jan 14th 2015
The LTC®7138 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. ...

Circuit 

 

LTC7138 5V to 140V Input to 5V/400mA Output with 20kHz Minimum Switching Frequency

Jan 14th 2015
The LTC®7138 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. ...

Circuit 

 

LTC7138 12V/400mA Automotive Supply

Jan 14th 2015
The LTC®7138 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. ...

Circuit 

 

LT3685 3.3V Step-Down Converter

Sep 3rd 2014
The LT®3685 is an adjustable frequency (200kHz to 2.4MHz) monolithic step-down switching regulator that accepts input voltages up to 38V operating and 60V maximum. An internal overvoltage protection circuit turns off the power switch when VIN is above 38V typical (36V minimum) which then allows the part to safely withstand ...

Circuit LTspice 

 

LT1158 High Current Lamp Driver with Short-Circuit Protection

Sep 2nd 2014
A single input pin on the LT1158 synchronously controls two N-channel power MOSFETs in a totem pole configuration. Unique adaptive protection against shoot-through currents eliminates all matching requirements for the two MOSFETs. This greatly eases the design of high efficiency motor control and switching regulator systems. ...

Circuit LTspice 

 

LT3796 SEPIC LED Driver with 100:1 Analog Dimming

Aug 25th 2014
The LT®3796/LT3796-1 are DC/DC controllers designed to regulate a constant-current or constant-voltage and are ideal for driving LEDs. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Two ground referred voltage FB pins serve as the input for several ...

Circuit LTspice 

 

LTC4366 Surge Protected Automotive 12V Supply

Aug 4th 2014
The LTC®4366 surge stopper protects loads from high voltage transients. By controlling the gate of an external N-channel MOSFET, the LTC4366 regulates the output during an overvoltage transient. The load may remain operational while the overvoltage is dropped across the MOSFET. Placing a resistor in the return line isolates ...

Circuit LTspice 

 

LTC4364-1 4A, 12V Overvoltage Output Regulator with Ideal Diode Withstands 200V 1ms Transient at VIN

Aug 4th 2014
The LTC4364 surge stopper with ideal diode controller protects loads from high voltage transients. It limits and regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the voltage drop across an external N-channel MOSFET pass device. The LTC4364 also includes a timed, current limited ...

Circuit LTspice 

 

DC1784A - LT3797EUKG Demo Board | Triple Boost LED Driver, 2.5V ≤ VIN ≤ 40VIN, 50VLED @ 1A (x3)

Jan 21st 2014
DC1784A is a triple boost LED driver featuring the LT3797 triple boost LED controller. It accepts an input voltage from 2.5V to 40V (with higher transient) and drives three independent strings of up to 50V LEDs at 1A. DC1784A features independent PWM and analog dimming of each of the three LED strings. Each of the three channels ...

Demo Board LTspice 

 

LTC3637 4V to 76V Input to 15V Output* Clamp, 1A High Efficiency Surge Stopper

Dec 20th 2013
The LTC®3637 is a high efficiency step-down DC/DC regulator with an internal high side power switch that draws only 12μA DC supply current while maintaining a regulated output voltage at no load. ...

Circuit 

 

Bench Comparison of Two Overvoltage Protection (Crowbar) Methods: MOSFET vs. Silicon Controlled Rectifier

Jason Sekanina - Power Module Design Engineer
Willie Chan - Sr PME Power Modules
Oct 10th 2013
Introduction As electronic sub-systems play a significant role in the reliable and safe operation of the overall product, adding an overvoltage protection circuit around the DC/DC step-down regulator may be advisable to prevent damage to the latest digital logic processors considering their absolute maximum voltage (<2V ...

Blog Post 

 

Minimize Standby Current in Automotive DDR Supplies

David Gilbert - Associate Design Engineer Sep 12th 2013
When you turn on a laptop or a smart phone, you expect to wait for it to boot up, but you are less patient when you turn on your car. With a car, consumers expect immediate access to computer electronics, including navigation and infotainment systems, and automobile manufacturers strive to meet this desire with design strategies ...

Blog Post 

 

2.7V to 40V Monolithic Buck-Boost DC/DC Expands Input Capabilities, Regulates Seamlessly through Automotive Cold-Crank and Load-Dump Transients

John Canfield - Design Engineer Jul 17th 2013
Handheld devices, industrial instruments and automotive electronics all demand power supply solutions that can support an expansive range of input voltages resulting from automotive input voltage transients, resistive line drops and a wide variety of power sources. As a further design challenge, applications often require a ...

Blog Post 

 

DC2079A - LT3954 Demo Board | Boost LED Driver with PWM Generator; 5V ≤ VIN ≤ 30V, VLED up to 32V @ 650mA

Jun 5th 2013
Demonstration circuit 2079A is a Boost LED driver featuring the LT3954. The LT3954 is a multitopology 40VIN/40VOUT LED driver with an internal device 40V, 5.4A power switch. It generates its own PWMOUT waveform from its internal PWM generator for accurate PWM dimming with up to 33:1 brightness ratio. The demo circuit ...

Demo Board LTspice 

 

The Right Power Supply Can Simplify Automotive ECU Design

Christian Kueck Apr 30th 2013
In my last entry, I boiled down the design of automotive electronic modules or ECUs to the ability to meet three essential requirements: Can handle high voltage situations like load dumps or double-battery jumps. Can ride-through low voltage cold crank conditions Draw minimal current in standby conditions, a.k.a. low quiescent ...

Blog Post 

 

Distilled Automotive Electronics Design

Christian Kueck Apr 1st 2013
The Rise of the 12V Net The electrical network in automobiles has come a long way over the last century, and it continues to be a work in progress. The first useful American electric starter was patented by Kettering and Leland in 1911. Before that, the internal combustion engine automobile was a non-starter, with the market ...

Blog Post 

 

LT8705 12V Output Converter Accepts 4V to 80V Input (5.5V Minimum to Start)

Jan 7th 2013
The LT8705 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The part has integrated input current, input voltage, output current and output voltage feedback loops. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8705 ...

Circuit 

 

DC1831A - LT3763 Demo Board I High Power CC/CV Synchronous Buck LED Driver Controller

Nov 14th 2012
Demonstration circuit 1831A is a high power constant current, constant voltage synchronous buck controller featuring the LT®3763. The input of the demo board is up to 60V. The output is optimized for 10V, 10A as a LED driver. The input voltage range of the LT3763 itself is 6V to 60V. The demo board input range is 12V to ...

Demo Board 

 

Floating Surge Stopper Provides Unlimited Overvoltage Protection

Hamza Salman Afzal - Applications Engineer Nov 7th 2012
Protecting sensitive electronic circuitry from voltage transients is an essential part of any system be it automotive, industrial, avionics or even battery-powered consumer applications. Linear Technology offers a wide variety of solutions for these applications with its surge stopper family. The LTC®4366 is the new exciting ...

Video 

 

LTC3864 : 5V, 2A 350kHz Step-Down Converter

Oct 23rd 2012
The LTC3864 is a robust, high voltage step-down DC/DC controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET switch allowing 100% duty cycle operation. The wide input and output voltage ranges cover a multitude of applications. This device has been verified with the failure mode and ...

Circuit LTspice 

 

LTC3864: 24V to 60V Input, 24V/1A Output at 750kHz

Oct 23rd 2012
The LTC3864 is a robust, high voltage step-down DC/DC controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET switch allowing 100% duty cycle operation. The wide input and output voltage ranges cover a multitude of applications. This device has been verified with the failure mode and ...

Circuit LTspice 

 

LT3796 34W LED Driver With Robust Output Short-Circuit Protection

Apr 3rd 2012
Figure 1 shows the LT3796 configured as a boost converter to drive a 34W LED string from a wide input range. The LED current is derated at low input voltages to prevent external power components from overheating. The front-end current sense amplifier monitors the input current by converting the input current to a voltage signal ...

Circuit LTspice 

 

LTC2960 Li-Ion Battery and Regulator Monitor

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Window Comparator for High Voltage Input

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Battery Disconnect to Protect Against Deep Discharge

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Micropower Power Supply Sequencer and Supervisor

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Automotive Supervisor

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LT3791 15–58VIN to 33.3V 3A LED Automotive Headlight Driver with Up to 98.5% Efficiency

Mar 7th 2012
Airplanes and big trucks with 24V batteries need powerful, efficient and robust headlights and spotlights. This circuit shows a 33.3V, 3A (nine Luminus SSR-90 LEDs) buck-boost LED driver that runs from 15V to 58V input with up to 98.5% efficiency. The 4-switch synchronous topology drives high power LEDs with minimal switch power ...

Circuit 

 

LT3791 98.5% Efficient 100W (33.3V 3A) Buck-Boost LED Driver

Mar 7th 2012
The LT®3791 is a synchronous 4-switch buck-boost LED driver controller. The controller can regulate LED current up to 52V of LED string with input voltages above, below, or equal to the output voltage. The constant-frequency, forced-continuous current mode architecture allows its frequency to be adjusted or synchronized ...

Circuit LTspice 

 

Overvoltage Regulator with 250V Surge Protection

Dec 20th 2011
The LT4363 surge stopper protects loads from high voltage transients. It regulates the output during an overvoltage event, such as load dump in vehicles, by controlling the gate of an external N-channel MOSFET. The output is limited to a safe value allowing the loads to continue functioning. The LT4363 also monitors the voltage ...

Circuit LTspice 

 

28V Vehicle Application with Reverse Voltage Protection

Dec 14th 2011
The LTC4366 surge stopper protects loads from high voltage transients. By controlling the gate of an external N-channel MOSFET, the LTC4366 regulates the output during an overvoltage transient. The load may remain operational while the overvoltage is dropped across the MOSFET. Placing a resistor in the return line isolates the ...

Circuit 

 

LTC3115-1 750kHz Automotive 5V Regulator with Cold Crank Capability

Nov 17th 2011
The LTC3115-1 is a high voltage monolithic synchronous buck-boost DC/DC converter. Its wide 2.7V to 40V input and output voltage ranges make it well suited to a wide variety of automotive and industrial applications. A proprietary low noise switching algorithm optimizes efficiency with input voltages that are above, below ...

Circuit 

 

LTC3115-1 USB, FireWire, Automotive and Unregulated Wall Adapter to Regulated 5V

Nov 17th 2011
The LTC3115-1 is a high voltage monolithic synchronous buck-boost DC/DC converter. Its wide 2.7V to 40V input and output voltage ranges make it well suited to a wide variety of automotive and industrial applications. A proprietary low noise switching algorithm optimizes efficiency with input voltages that are above, below or ...

Circuit 

 

LT3759 2.5V to 36V Input, 12V/1A Output SEPIC Converter (Automotive 12V Regulator)

Sep 21st 2011
The LT3759 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin. It can be configured as a boost, SEPIC or inverting converter. The LT3759 drives a low side external N-channel power MOSFET. An internal LDO regulator draws power ...

Circuit LTspice 

 

Computer Voltage and Temperature Monitoring

Aug 18th 2011
The LTC2991 is used to monitor system temperatures, voltages and currents. Through the I2C serial interface, the eight monitors can individually measure supply voltages and can be paired for differential measurements of current sense resistors or temperature sensing transistors. Additional measurements include internal temperature ...

Circuit 

 

Wide VIN Range Step-Down Regulators Consume Only 2.8μA Input Current

John Gardner - Design Engineer May 23rd 2011
Battery life is paramount in modern battery-powered systems. Portable applications, such as remote sensors, require voltage regulators which have low current standby states and also able to provide bursts of high power. Linear Technology’s LT®3970/LT3971 lead the industry in low current standby mode by consuming only ...

Video 

 

DC1497A - LT3597EUHG Demo Board | Triple Step-Down LED Driver, 6V ≤ VIN ≤ 55V, VLED up to 34V @ 100mA (x3)

May 10th 2011
Demonstration circuit 1497A is a 60V triple step-down LED driver featuring the LT3597. The demo board is optimized for driving nine white LEDs at 100mA output per regulator from a 48V input. The LT3597 features a 5V to 55V input voltage range; depending on the number of LEDs used, the minimum input voltage will change. When ...

Demo Board LTspice 

 

12V/5A Output From 4V-38V Automotive Input Supply

Dec 1st 2010
The LTC3789 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The constant-frequency, current mode architecture allows a phase-lockable frequency of up to 600kHz, while an output current feedback loop provides support for battery charging. ...

Circuit LTspice 

 

Six Output DC/DC μModule Regulator From 3V to 72V Input

Nov 9th 2010
The LTM8008 is a 72VIN, μModule SEPIC converter with six post regulators. The SEPIC controller’s fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages and features soft-start and frequency foldback functions to limit inductor current during start-up and output ...

Circuit 

 

DC1511A-B - LTM8042EV-1 Demo Board | uModule Boost LED Driver, 3V ≤ VIN ≤ 30V, Vout up to 32V @ 350mA

Oct 28th 2010
Demonstration circuits 1511A-B features the LTM®8042-1, which is a complete 350mA µModule LED driver. The demonstration circuit is configured using the boost topology, accepting an input voltage from 3V to 30V and supporting an output up to 32V. The default switching frequency is 950kHz for the DC1511A-B, but ...

Demo Board LTspice 

 

DC1511A-A - LTM8042EV Demo Board | uModule Boost LED Driver, 3V ≤ VIN ≤ 30V, Vout up to 32V @ 1A

Oct 22nd 2010
Demonstration circuits 1511A-A features the LTM®8042, which is a complete 1A µModule LED driver. The demonstration circuit is configured using the boost topology, accepting an input voltage from 3V to 30V and supporting an output up to 32V. The default switching frequency is 600kHz for the DC1511A-A, but can be ...

Demo Board LTspice 

 

Complete 12V Automotive Undervoltage, Overvoltage and Reverse-Supply Protection Circuit

Sep 10th 2010
The LTC4365 is a unique solution that elegantly and robustly protects sensitive circuits from unpredictably high or negative supply voltages. The LTC4365 blocks positive voltages as high as 60V and negative voltages as low as –40V. Only voltages in the safe operating supply range are passed along to the load. The only external ...

Circuit 

 

LT3518 Full-Featured 45V, 2.3A Switch Current LED Driver - Video Product Brief

Steve Knoth - Senior Product Marketing Engineer Aug 25th 2010
The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost,buck and buck-boost modes. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. Programmable ...

Video LTspice 

 

LTC4360/LTC4361/LTC4362 Overvoltage / Overcurrent Protection Controllers - Video Product Brief

Alison Steer - Product Marketing Manager Aug 25th 2010
The LTC4360/LTC4361/LTC4362 overvoltage/overcurrent protection controllers safeguard 2.5V to 5.5V systems from input supply overvoltages and overcurrents. They are designed for portable devices with multiple power supply options including wall adapters, car battery adapters and USB ports. The LTC4360 controls an external ...

Video 

 

DC1327B - LT3599EFE Demo Board | 4-Channel Boost LED Driver, 8V ≤ PVIN ≤ 16V, VLED up to 44V @ 80mA

Jul 21st 2010
Demonstration circuit 1327B is a 4-Channel 80mA LED Driver with +/-1.5% Current Matching featuring the LT3599. The LT3599 is a step-up DC/DC converter designed to drive up to 4-strings of LEDs at up to 120mA per string, and with an output voltage up to 44V. The LED strings are connected to internal current sources where the ...

Demo Board LTspice 

 

LT3748 5V, 2A Output from Automotive Input with Continuous Operation from 6V to 45V

Jul 20th 2010
The LT3748 is a switching regulator controller specifically designed for the isolated flyback topology and capable of high power. It drives a low side external N-channel power MOSFET from an internally regulated 7V supply. No third winding or opto-isolator is required for regulation as the part senses the isolated output voltage ...

Circuit LTspice 

 

Protection of USB Port from Overvoltage and Overcurrent

Jun 7th 2010
The LTC4362 monolithic overvoltage/overcurrent protector safeguards 2.5V to 5.5V systems from power supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports. ...

Circuit 

 

5V System Protected from ±24V Power Supplies and Overcurrent

Jun 7th 2010
The LTC4362 monolithic overvoltage/overcurrent protector safeguards 2.5V to 5.5V systems from power supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports. The LTC4362 features a soft-shutdown controlled by the ON pin and drives an ...

Circuit 

 

94% Efficient 25W White LED Automotive Headlamp Driver

May 18th 2010
The LT3956 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It is ideally suited for driving high current LEDs. It features an internal low side N-channel power MOSFET rated for 84V at 3.3A and driven from an internal regulated 7.15V supply. The fixed frequency, current-mode ...

Circuit LTspice 

 

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