S-19251A20H-A4T7U4

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

The S-19251A20H-A4T7U4 is an automotive-grade positive voltage regulator from ABLIC Inc., designed for operation up to 105°C. It features a 5.5 V maximum input voltage and delivers a fixed 2.0 V output with ±2.5% accuracy across the operating temperature range of -40°C to +105°C. The device supports a 150 mA output current and operates at a typical quiescent current of 20 μA, dropping to 0.1 μA in standby mode. It utilizes SOT-23-5 packaging and incorporates built-in overload current protection and thermal shutdown circuits.

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

• High ripple rejection ratio reaching 75 dB for stable power supply performance
• Integrated overload current protection circuit to limit output transistor stress
• Thermal shutdown circuit activates at approximately 150°C to prevent overheating
• Supports ON/OFF control function to extend battery life in vehicle applications

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

• Automotive instrument clusters and metering systems
• Vehicle body electronics and lighting controls
• In-car navigation and audio systems
• Intelligent Transport Systems (ITS) components

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

Verify that the specific suffix matches the required package type and output voltage configuration. Confirm compliance with AEC-Q100 standards if intended for strict automotive qualification. Consult the manufacturer directly regarding availability for vehicle equipment usage, as specific ordering requirements may apply. Ensure the component meets the necessary temperature ratings for the target application environment before finalizing procurement.

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

Select this component when a low quiescent current and high precision are required for automotive power management. The SOT-23-5 package suits designs needing compact footprints without sacrificing current capability. Consider the integrated protection features for robustness against transient loads. Verify that the input voltage range aligns with the system's power source and that the thermal characteristics meet the installation constraints.

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

This part belongs to the S-19251 series, which utilizes CMOS technology to achieve low consumption current and high ripple rejection. The series is specifically engineered for automotive environments, offering various output voltages from 1.0 V to 3.5 V in 0.05 V steps. It represents a solution for dense mounting requirements while maintaining high reliability under harsh thermal conditions typical in modern vehicles.

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

Direct substitutes within the same series include other S-19251 variants with different output voltages or package options such as HSNT-4. Cross-series replacements require matching input voltage, output current, and automotive grade specifications. Verify pin compatibility and thermal performance before substituting with other LDO regulators.