Automotive 500mA/1000mA LDO Regulators Reduce ECU Standby Currents

ABLIC Inc. launched the 500mA/1000mA S-19213/4 Series of LDO regulators. The S-19213/4 Series of automotive LDO regulators combine ultra-low self-current consumption with high output current. The new series features a 36V (45V rating) input, 1.8V to 30V output, 5.0µA self-current consumption.

The LDO regulators operate at up to 125℃. S-19213 features 500mA output current, and S-19214 provides 1000mA output current. (See image above of chart describing CMOS voltage regulator for automotive use S-19213/4. The device is a 36V pressure-resistant voltage regulator that combines industries lowest current consumption–based on research as of June 2019–with high output current).

The LDO regulators can be used for constant-voltage power supplies for electrical applications for vehicle interior as well as for other automotive applications including engine, transmission, suspension, ABS, and other devices.

Block diagram where the output voltage is internally set (Click on image to enlarge)

Ultra-low self-current consumption in standby mode helps reduce standby current.

Also, high-power dissipation during operation enables the supply of high output current.

The S-19213/4 Series is undergoing compliance testing for AEC-Q100 automotive IC quality standard, and the series complies with the Production Part Approval Process (PPAP).

ABLIC points out that the increased multi-functionality and electrification of the automobile has resulted in a steady increase in the number of ECUs in automobiles. Therefore, according to ABLIC, it is essential to lower not only the current consumption of microcontrollers but also the self-current consumption of the power-supply ICs to reduce the standby current.

Other factors including the multi-functionality of microcontrollers, mean the units demand an ever-increasing amount of current to operate.

Block diagram where the output voltage is externally set (Click on image to enlarge)

ABLIC says that the S-19213/4 Series will serve to lower ECU standby current by balancing the conflicting needs of low self-current consumption and high output current.

The 36V input/45V rating of the regulators with ultra-low self-current consumption of 5.0µA enables direct connection to a battery. An external adjustment pin enables flexible output voltage settings between 1.8V to 30V.

Automotive Grade

The S-19213/4 Series has been subjected to the three-temperature test (low, normal and high temperature). The company says it will comply with the AEC-Q100 reliability and quality test defined by the Automotive Electronics Council (AEC).

  • Output voltage (internally set): 1.8V, 3.0V, 3.3V, 5.0V, 8.0V, 12.0V
  • Output voltage (externally set): 1.8V to 30.0V, settable via external resistor
  • Input voltage: 2.8V to 36.0V
  • Output voltage accuracy: ±1.5% (Tj = −40°C to +125°C)
  • Current consumption: During operation: 5.0µA typ., 9.8µA max. (Tj = −40°C to +125°C)
  • During power-off: 0.1µA typ., 2.0µA max. (Tj = −40°C to +125°C)
  • Output current: Possible to output 500 mA (at VIN ≥ VOUT(S) + 1.0V)
  • Input and output capacitors: A ceramic capacitor can be used. (1.0μF or more)
  • Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
  • Built-in thermal shutdown circuit: Detection temperature 170°C typ.
  • Built-in ON / OFF circuit: Ensures long battery life.
  • Discharge shunt function is available.
  • Pull-down function is available.
  • Operation temperature range: Ta = −40°C to +125°C
  • Lead-free (Sn 100%), halogen-free
  • Withstand 45V load dump
  • AEC-Q100 in process
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