Applications

Automotive DC/DC Converter

ICs ideal for DC/DC Converters

for automotive DC/DC Converter

EV, PHEV and HEV vehicles are equipped with two types of batteries: a high-voltage battery for drive and a 12V auxiliary battery. The DC/DC converter converts 200 to 800V from the high-voltage battery to 12V low voltage. This lower voltage powers the head lamps, windshield wipers, instrument cluster, ECUs and charges the auxiliary 12V battery.
The DC/DC converter uses low on-resistance Si IGBTs or SiC MOSFETs to reduce conversion loss. The on-resistance has the characteristic to drop as the gate voltage rises so it is recommended to design a gate drive circuit using, for example, an Si IGBT with a high voltage of around 15V or an SiC MOSFET with a high voltage of around 18V.
ABLIC has a lineup of LDOs that can output the high voltage required by the gate driver circuit. In addition, our lineup offers LDOs with built-in watchdog timers for monitoring MCUs, battery monitoring ICs used for high-speed monitoring of abnormal voltages in 12V auxiliary batteries and operational amplifiers ideal for charge current monitoring. With its wide range of products, ABLIC can provide ICs ideal for DC/ DC converters.

 

ICs ideal for DC/DC Converters

Click each product group for more ​product information.

HV Battery 200V to 800V CAN Multiple use Isolated Gate Driver 12V Battery 18V MCU 5V Gate Driver LDO Battery Monitoring IC OPAMP WDT LDO VD

*VD: Voltage detector (Reset IC)   *LDO: Low-dropout regulator   *WDT: Watchdog timer

 

ICs ideal for DC/DC Converters

Product Recommended product Applications and Features
LDO Regulator
(Linear Regulator)
S-19213/4 For use in SiC MOSFET or Si IGBT gate driver circuits. The output voltage can be adjusted between 1.8 to 30V using an external resistor.
LDO Regulator
(Linear Regulator)
S-19212 For use in Si IGBT gate driver circuits. The output voltage can be set between 2.5 to 16V.
Battery Monitoring IC
(Voltage detector)
S-19114 Industry’s fastest detection response time of 10µs max. Built-in SENSE Pin reverse connection protection circuit. Low current consumption of 2.0µA.
Battery Monitoring IC
(Voltage detector)
S-19115 Provides overvoltage monitoring. Built-in SENSE Pin reverse connection protection circuit. Current consumption of 0.6µA.
Watchdog Timer S-1951x With reset and LDO regulator functions. Current consumption of 3.0µA.
Operational amplifier S-19630A High-accuracy current detection. 36V operation, Rail-to-Rail input/output, low offset voltage of 50μV.

Features

LDO Regulator S-19213/4 series
High output voltage
Ultra-low current consumption

Automotive, 125°C Operation, 36 V Input, 500 mA / 1000 mA Voltage Regulator S-19213/4 Series

An LDO regulator capable of outputting the high voltage required by a gate driver circuit

This is an LDO regulator with a 36V input, 1.8 to 30V output, 500mA/1000mA output, an ultra-low current consumption of 5.0μA (typ.) and a high-power dissipation of 5.21W. This makes it ideal for the around 15 to 18V high-voltage gate driver circuits needed by SiIGBTs or SiC MOSFETs.

 ≫Learning more about the S-19213 
≫Learning more about the S-19214

Series name


S-19213

Datasheet

 Output current: 500mA

S-19214

Datasheet

 Output current: 1000mA

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Battery Monitoring IC S-19114 series
Ultra-high speed detection
Low current consumption 

Automotive, 125°C Operation, 36 V, Voltage Detector with Fast Detection Response, SENSE Pin Reverse Connection Protection, Delay Function (External Delay Time Setting) S-19114xxxA Series

Low Current Consumption Battery Monitoring IC with Industry’s Fastest Detection Response

The S-19114 Series exhibits the industry’s fastest voltage detection response time of 10µs max. and low current consumption of 2.0µA typ. Improves safety and lower current consumption of automotive devices.

≫Learning more about the S-19114

Series name


S-19114

Datasheet

 Detection response time: 10µs max.

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Battery Monitoring IC S-19115 series
Ultra-low current consumption
Ultra-compact package

Automotive, 125°C Operation, 36 V, Voltage Detector for Overvoltage Detection with Delay Function (External Delay Time Setting) S-19115xxxA Series

High-reliability Voltage Monitoring for Functional Safety

A battery monitoring IC that detects 36V input, overvoltage with high accuracy. The wide rated voltage from -30 to 45V of the monitoring connection (SENSE) pin enables input of high voltage as well as negative voltage.

≫Learning more about the S-19115

Series name


S-19115

Datasheet

 Overvoltage detection: 16.0V to 18.0V

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Watchdog Timer S-1951x series
Ultra-low current consumption

Automotive, 125°C Operation, 36 V Input, 500 mA, Built-in Window Watchdog Timer, Voltage Regulator with Reset Function  S-1951x Series

Single chip IC for Supplying MCU Power, Monitoring Voltage and Operation

This is a window watchdog timer IC with a 36V input, 250mA/500mA output and comes with reset and LDO regulator functions. Current consumption during operation is a mere 3.0uA, which helps reducing standby current. We are sure you will find a product tailored to your needs in our extensive lineup.

 ≫Learning more about the S-19516/7/9 
≫Learning more about the S-19514/5/8

≫List of Watchdog timer

Series name


S-19516/7

Datasheet

 Output current: 500mA

S-19519

Datasheet

 Output current: 500mA
 LDO: Built-in ON / OFF circuit

S-19514/5

Datasheet

 Output current: 250mA

S-19518

Datasheet

 Output current: 250mA
 LDO: Built-in ON / OFF circuit

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High-accuracy Operational Amplifier S-19630A
Low offset voltage
36V operation

Automotive, 125°C Operation, Low Input Offset Voltage CMOS Operational Amplifier S-19630A

Contributing to High-Accuracy Current Sensors

A wide operating voltage range allows use of this IC in systems from 5V to high-voltage systems directly connected to battery. Low offset voltage enables high-accuracy current detection. Input Rail-to-Rail enables low-side and high-side current detection.

≫Learning more about the S-19630A

Series name


S-19630A

Datasheet

 Operating voltage range: 4.0 V to 36 V
 Low offset voltage: 50μV max.
 Rail-to-Rail input and output

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