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Solutions Search - Automotive Cold Crank 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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

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 

 

Wide Input Range, 3.3V SEPIC Converter Can Operate from 3V to 36V (Cold Crank)

Mar 23rd 2010
While requiring 6V to start up, the addition of a diode tied from output to input allows this circuit to operate as the battery sags all the way down to 3V. This wide input voltage range is required for automotive cold crank applications. The LT3581 is a PWM DC/DC converter with built-in fault protection features to aid ...

Circuit 

 

High Efficiency Wide Input (Cold Crank) Range Dual 5V/8.5V Converter

Mar 18th 2010
The LTC3859 is a high performance triple output (buck/ buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of up to 850kHz. The LTC3859 operates from a wide 4.5V to 38V input supply ...

Circuit 

 

4V-60V (Cold Crank) Input to 5V Output DC/DC Automotive Converter

Jun 18th 2003
Ultrawide input voltage requirements are a common design problem for DC/DC converter applications, but when that range includes voltages both above and below the output voltage, the converter must perform both step-up and step-down functions. The LT3433 is a high voltage monolithic DC/DC converter that incorporates two switch ...

Circuit 

 

4V to 18V (Cold Crank) Input to 12V Output 3mm Maximum Height All Ceramic SEPIC

Jul 15th 2002
12V buses are often derived from sources with a wide input voltage range. For instance, automotive solutions can have steady-state operating voltages as high as 18V and as low as 4V for cold-crank conditions. Figure 4 shows a simple, low cost and low profile (3mm) solution that avoids the high cost of using both a boost and ...

Circuit