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Solutions Search - Automotive High Vin DC/DC

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

Automotive 9V - 19.5Vin to 5V at 1A with 60V Transient Protection and 1.7MHz Switching Frequency

Dec 15th 2008
The LT3682 is a 1A monolithic buck switching regulator that accepts input voltages from 3.6V to 36V and transients up to 60V. It features an adjustable and synchronizable switching frequency from 250kHz to 2.2MHz. It also has the ability to monitor the current flowing through the external catch diode, thus providing an extra ...

Circuit 

 

LTC4425 Embedded Automotive (6V to 36V Input) to 5V/3.3V/1.8V/1.2V Output Peak-Power Controller using Two Supercapacitors

Mar 19th 2007
The LTC4425 is a constant-current/constant-voltage linear charger designed to charge a 2-cell supercap stack from either a Li-Ion/Polymer battery, a USB port, or a 2.7V to 5.5V current-limited supply. The part operates as an ideal diode with an extremely low 50mΩ on-resistance making it suitable for high peak-power/low ...

Circuit