S-19251C33H-M5T1U4

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

The S-19251C33H-M5T1U4 is an automotive-grade positive voltage regulator from ABLIC Inc., utilizing CMOS process technology. It provides a fixed output voltage of 3.3 V with ±2.5% accuracy across the operating temperature range of −40°C to +105°C. The device supports an input voltage range of 1.5 V to 5.5 V and delivers up to 150 mA of output current. Key electrical parameters include a typical dropout voltage of 0.16 V at 100 mA, a ripple rejection ratio of 70 dB typ. at 1.0 kHz, and low current consumption of 20 μA during operation. It features built-in overcurrent protection and thermal shutdown circuits.

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

• Built-in discharge shunt function for rapid output capacitor discharge when powered off
• Internal pull-down resistor on the ON/OFF pin ensures defined logic states in floating conditions
• High ripple rejection capability for stable power supply performance
• Integrated overcurrent protection and thermal shutdown circuits for enhanced reliability

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

• Automotive meter systems
• Car body electronics
• Headlight control units
• In-vehicle navigation systems
• Car audio systems

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

Verify that the specific ordering suffix M5T1U4 corresponds to the SOT-23-5 package configuration. Confirm the C-type designation indicates the availability of the internal pull-down resistor while ensuring the discharge shunt function is not required for the application. Ensure compliance with AEC-Q100 Grade 2 requirements before finalizing procurement specifications.

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

Select this component for applications requiring a fixed 3.3 V rail with high accuracy and low quiescent current. The C-type variant is suitable where internal pull-down functionality is desired but discharge shunt capabilities are unnecessary. Verify that the ceramic output capacitance meets the minimum requirement for phase compensation stability under all expected load and temperature conditions.

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

This part belongs to the S-19251 Series, designed specifically for automotive environments with operation up to 105°C. The series offers multiple package options including SOT-23-5 and HSNT variants. The C-type designation distinguishes it by its specific ON/OFF pin configuration, featuring an internal pull-down resistor without a discharge shunt circuit.

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

S-19251B33H-M5T1U4

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

What is the behavior of the output voltage when the ON/OFF pin is set to OFF?

For the S-19251C type, the output voltage is pulled down to the VSS level through internal divided resistors because it lacks a dedicated discharge shunt circuit.

How does the S-19251C type differ from the A type regarding the ON/OFF pin?

The S-19251C type includes an internal pull-down resistor on the ON/OFF pin but does not have a discharge shunt function, whereas the A type has both features.