S-19251B29H-A4T6U4

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The S-19251B29H-A4T6U4 is an automotive-grade linear voltage regulator from the S-19251 series, manufactured by ABLIC Inc. using CMOS technology. It provides a fixed output voltage of 2.9 V with high accuracy and supports an input voltage range of 1.5 V to 5.5 V. The device delivers up to 150 mA of output current while maintaining low power consumption, with typical operating current of 20 μA and standby current of 0.1 μA. It features high ripple rejection rates and operates within a junction temperature range of −40°C to +105°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• High precision output voltage regulation suitable for sensitive automotive electronics
• Ultra-low current consumption in both active and sleep modes to extend battery life
• Integrated overcurrent protection and thermal shutdown circuits for enhanced reliability
• Built-in ON/OFF control circuit with selectable discharge and pull-down functions

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive metering systems
• Body electronic control units
• Car audio navigation devices
• Intelligent Transportation Systems (ITS)
• Vehicle interior lighting and accessories

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix codes against official ABLIC documentation to ensure correct package type and tape/reel specifications. Confirm that the selected variant meets the required AEC-Q100 qualification standards for your specific automotive application tier. Cross-reference the part number with authorized distributors to validate authenticity and traceability before procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when designing automotive circuits requiring stable 2.9 V supply with minimal quiescent current draw. Ensure the input voltage remains within the 1.5 V to 5.5 V range to maintain regulation. Consider the thermal performance under maximum load conditions, as the device includes thermal shutdown protection. Verify compatibility with ceramic capacitors of at least 1.0 μF for stability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the S-19251 series of positive voltage regulators designed specifically for automotive use. The series utilizes high-withstand voltage CMOS processes to achieve low power consumption and high ripple rejection. It is available in compact packages such as SOT-23-5 and HSNT-4 variants, facilitating dense PCB layouts in modern vehicle electronics where space and efficiency are critical constraints.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes within the same family include other S-19251 variants with different fixed output voltages or package options, provided the electrical parameters match the design requirements. Verify pinout compatibility and thermal characteristics when considering alternative manufacturers' LDOs.