Automotive high-withstand voltage LDO linear regulator IC for auxiliary batteries

ABLIC Inc. has launched the S-19230/1 Series, an automotive high-withstand voltage regulator IC that attains the industry's lowest operating current.

Recently, the power consumption of automotive electronic components, such as various ECUs and infotainment systems, has been steadily increasing. As a countermeasure, there is a growing trend to increase the voltage of automotive auxiliary batteries from the conventional 12V to 48V. Auxiliary batteries supply power to electronic components via wire harnesses. By quadrupling the voltage to provide the same power, the current can be lowered to one-quarter. This allows the use of thinner wire harnesses, contributing to lighter vehicle designs and improved fuel or electric power efficiency.

The newly launched S-19230/1 Series supports 48V, 24V, and 12V auxiliary batteries, thanks to its high input voltage tolerance of up to 80V. It also achieves an industry-lowest operating current of 2µA, which is essential for supplying power to constantly operating sensors and CAN/LIN transceivers, helping to reduce the system's standby current.

Also, this product is the first of the company's voltage regulators to integrate an open-loop protection circuit. The protection circuit suppresses the rise in output voltage to a certain level if the wiring between the external resistor and the IC, used for setting the output voltage, is broken (open fault). This protection circuit eliminates the need for conventional external components used for overvoltage protection, resulting in cost reduction, space savings, and enhanced safety.

Application examples include:

• Power supplies for various sensors
• Power supply for CAN transceivers
• Power supply for LIN transceivers
• Automotive applications (engines, transmissions, suspensions, ABS, EV/HEV/PHEV, etc.)
• Constant voltage power supply for in-vehicle electronic applications