Automotive, 125°C operation,
high-withstand voltage linear regulator with reset function

S-19315/6 Series


Requirements of devices
that operates when a vehicle is parked and the engine is off

  • Reduce standby current through intermittent operation
    to minimize system operation.

  • Instantaneous detection
    of part and voltage malfunctions is desirable.

  • Ensure stable operation
    even under light load.

The S-19315/6 Series resolves these issues
The S-19315/6 Series of LDOs comes with reset function.
The world's lowest current consumption, outstanding power supply capability and monitoring function help reduce ECU standby current and ensure device safety.

S-19315/6 Series

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The world’s lowest current consumption for building ECUs with ultra-low consumption

Ideal for applications operating when the engine is off

To reduce standby current of an ECU that operates even when a vehicle is parked and the engine is off, it is essential to select power ICs and main components such as the MCU with low self-current consumption.

The S-19315/6 Series achieve the world’s lowest self-current consumption of 2.0μA typ (2.2μA typ. for the S-19316 Series), which is ideal for reducing the standby consumption of ECU.

Also the high-withstand voltage of 45V of the SENSE pin enables it to be directly connected to a 12V battery for voltage monitoring.
The small packge SOT-23-5(2.8 x 2.9mm) enables to reduce the space of mouting space.

Fast detection and stable output under light load guarantee equipment safety

Industry’s fastest detection
The S-19315/6 Series overcomes the usual tradeoff between high-withstand voltage and detection speed by offering the industry’s fastest detection and high-withstand voltage.

Operation when detecting low voltage
 ・S-19315 Series:Stop the output of LDO
 ・S-19316 Series:keep the output of LDO

Ensures stable output even under extremely light load
In conventional power supply ICs, light load would cause the output voltage to rise which could sometimes damage downstream devices.

The S-19315/6 Series can maintain a stable output voltage even during almost 0 load conditions.
It provides the MCU and sensors with a stable voltage at all times even under light load.

Proposing the ideal series of options tailored to application

Release voltage and detection voltage can be separately set
The hysteresis width of S-19315/6 Series detection and release voltage can be set to a range of 5% to 30% in the 3.0V – 11.3V range.

Proposing the series that best suits your monitoring needs
You can now select the LDO series that best suits your monitoring needs.

▶S-19315 Series: Monitors the SENSE pin
It can monitor the voltage of the device connected to the SENSE pin. Enables to monitor over voltage and under voltage in both input and output.

▶S-19316 Series: Monitors the input voltage of the built-in LDO
It enables quick detection of voltage drops in the input voltage.

 ≫Monitors built-in LDO output voltage S-19310 Series

*Based on our research as of March 2020.


Devices that operate intermittently when a vehicle is parked (the engine is off)

  • EEFI (Electronic Fuel Injection)
  • BMS (Battery Management System)
  • Door handle sensor

Time management applications

  • Meter
  • Car navigation system
  • TCU (Telematic Control Unit)

Automotive Voltage Regulator with Reset Function Line up


Product name S-19315 Series S-19316(A) Series S-19316(B) Series
  For Automotive
[Regulator block]      
Input voltage VIN=3.0 to 36.0V
Output current 40mA
Output voltage VOUT=1.0 to 5.3V,
selectable in 0.1 V step
VOUT=1.0 to 5.3V,
selectable in 0.1 V step
VOUT=1.8 to 5.3V,
selectable in 0.1 V step
Output voltage accuracy ±2.0% (Tj = −40°C to +125°C)
[Detector block]      
Detection voltage 3.0V to 11.3V
Operation voltage 3.0V to 36.0V 1.8V to 36.0V 2.5V to 36.0V
Hysteresis width “Available”: 5.0% ≤ VHYS ≤ 30.0% / “Unavailable”: VHYS = 0%
Release delay time accuracy ±20% ±20%
Output form Nch open-drain output Nch open-drain output CMOS output
Current consumption 2.0μA typ. 2.2μA typ. 2.2μA typ.
Current consumption
during LDO OFF
Package SOT-23-5, SOT-89-5, HTMSOP-8
Automotive quality AEC-Q100 qualified, PPAP capable




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S-19315 Series

s-19316 Series