Automotive Electric Power Steering Motors

Block circuit　｜　ICs ideal for Electric Power Steering Motors　｜　Features

ICs ideal for Electric Power Steering Motors

Electric Power Steering (EPS) uses an electric motor to assist the operation of the steering wheel. Compared to the conventional hydraulic assist system, EPS improves fuel efficiency because it does not require an engine-powered oil pump. Additionally, EPS is indispensable for advanced driver assistance such as Autonomous and Lane Keeping Assist, which can be precisely controlled by an electric motor.
ABLIC offers ICs ideal for EPS motors that support “A” (Autonomous) in CASE. ABLIC offers a comprehensive range of products: such as ZCL™ Hall effect ICs which operate ideally in BLDC motors, high-accuracy Voltage Trackers for torque sensor power supplies, LDOs with built-in watchdog timers for monitoring MCUs, and battery monitoring ICs that monitor 12V auxiliary batteries for abnormal voltages.

ICs ideal for Electric Power Steering Motors

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

ICs ideal for Electric Power Steering Motors

Product	Recommended product	Applications and Features
DC-DC converter (Switching regulator)	S-19914/5	36V input, low noise, available in the industry’s smallest package. Contributes to fewer and more compact external parts.
Watchdog Timer	S-1951x	With reset and LDO regulator functions. Current consumption of 3.0µA.
Battery Monitoring IC (Voltage detector)	S-19113	Provides undervoltage monitoring. Built-in SENSE Pin reverse connection protection circuit. Current consumption of 0.6µA.
Voltage Tracker	S-19721	The industry’s lowest class offset voltage of ±4.5mV. 250mA output current. Built-in Anomaly Notification.
Voltage Tracker	S-19720	The industry’s lowest offset voltage of ±5mV. 50mA output current. Available in an ultra compact (2.46 x 1.96mm) package. Current consumption during power-off of 4µA.
LDO Regulator (Linear Regulator)	S-19222	Power supply for sensors and microcontrollers (MCUs). High PSRR 75dB (at f = 1.0 kHz). Fast Transient Response.
Hall effect IC (Magnetic sensor IC)	S-57TZ S	ZCL™ Hall effect ICs are perfect for BLDC motor control, creating stable BLDC motor control over a wide temperature range.
Hall effect IC (Magnetic sensor IC)	S-57RB S	Bipolar Hall effect Latch ICs with a thin and small package. The thin package contributes to thinner BLDC motors.
EEPROM	S-25Axxx (SPI)	Serial EEPROM. Built-in data protection functions.
EEPROM	S-93Axx (3-wire)
EEPROM	S-93Sxx (3-wire)

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Voltage Tracker S-19721 series
Low offset voltage
Built-in Anomaly Notification

Automotive, 125°C Operation, 36 V Input, 250 mA Voltage Tracker with Reverse Current Protection Function S-19721 Series

Improves Higher-accuracy Sensing and Safety Design

The voltage tracker with its offset voltage of ±4.5mV, 36V input, 250mA output current, and built-in Anomaly Notification. It can handle three types of abnormalities: overvoltage, overcurrent at the output pin, and heating of itself. It is possible to select the appropriate combination of outputs according to the specifications and applications.

≫Learning more about the S-19721
≫What is a Voltage Tracker?

Series name

S-19721

Datasheet

　Offset voltage: ±4.5mV
　Output current: 250mA

Voltage Tracker S-19720 series
Low offset voltage
Ultra-compact package
Low current consumption

Automotive, 125°C Operation, 36 V Input, 50 mA Voltage Tracker with Reverse Current Protection Function S-19720 Series

Voltage Tracker that contributes to high-accuracy sensing

The industry’s lowest offset voltage of ±5mV helps keep the power supply voltage of the off-board ratiometric sensor equal to the reference voltage (Vref) of the AD converter (ADC) handling ECU measurements, raising sensor reading accuracy. The voltage tracker with its 36V input and 50mA output current is housed in an HSNT-6(2025), the industry’s smallest package. The S-19720 helps further reduce the footprint of automotive devices.

≫Learning more about the S-19720
≫What is a Voltage Tracker?

Series name

S-19720

Datasheet

　Offset voltage: ±5mV
　Output current: 50mA

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LDO Regulator S-19222 series
High PSRR
Fast Transient Response

Automotive, 125°C Operation, 36 V Input, 300 mA, Fast Transient Response, Voltage Regulator S-19222xxxA Series

Provides stable power supplies thanks to the industry’s highest PSRR and the industry’s fastest transient response!

This LDO regulator offers a 36V input, 1.8 to 30V output, 300mA output, High PSRR 75dB (at f = 1.0 kHz) with Fast Transient Response. In addition, a wide range of packages allows customers to choose the right package for their application. Stabilized power ideal for automotive devices.

≫Learning more about the S-19222

Series name

S-19222

Datasheet

　PSRR : 75dB (at f = 1.0 kHz)