S-19516AY3A-V9T1U4

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

The S-19516AY3A-V9T1U4 is an automotive linear regulator featuring a built-in window watchdog timer and reset function. It provides a fixed 3.3 V output with ±2.0% accuracy across the -40°C to +150°C junction temperature range. The device supports a maximum input voltage of 36.0 V and delivers up to 500 mA output current. Key electrical parameters include a typical dropout voltage of 120 mV at 100 mA, a detection voltage of 2.8 V with ±2.0% accuracy, and a minimum hysteresis width of 120 mV. It withstands 45 V load dump events and operates within a -40°C to +125°C ambient temperature range.

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

• Integrates a low dropout positive voltage regulator with a high-withstand voltage capability for automotive environments.
• Includes a window watchdog timer block with autonomous operation function based on load current detection.
• Features a built-in voltage detection circuit that monitors output voltage and triggers a reset signal upon threshold crossing.
• Provides overcurrent protection and thermal shutdown circuits to ensure operational safety under fault conditions.

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

• Constant-voltage power supply for automotive electric components
• Monitoring microcontrollers in vehicle equipment

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

Verify the specific package configuration matches the required board layout, as this part number corresponds to the TO-252-9S package. Confirm that the selected external capacitors meet the equivalent series resistance requirements to prevent oscillation. Ensure the application design accounts for power dissipation limits when operating near maximum output currents. Contact sales representatives for details regarding AEC-Q100 reliability specifications and functional safety FIT rates.

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

Select this component for applications requiring high input voltage tolerance up to 36 V combined with integrated system monitoring. The device is suitable for designs needing adjustable watchdog timing via an external capacitor connected to the DLY pin. Consider the TO-252-9S package for its thermal performance in high-power scenarios. Verify that the set output voltage remains at least 0.3 V higher than the set detection voltage to ensure proper detector block operation.

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

This device belongs to the S-19516/19517 Series developed using high-withstand voltage CMOS technology. It is designed specifically for automotive electronics, offering AEC-Q100 qualification. The series distinguishes itself by combining power regulation with sophisticated watchdog and reset functionalities in a single IC, reducing the component count for complex vehicle control units.

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

The S-19516AY3A-E8T1U4 serves as a direct alternative, offering identical electrical specifications but housed in an HSOP-8A package instead of the TO-252-9S format used by the S-19516AY3A-V9T1U4.