ME6251 Power Management IC, CMOS Type Low Dropout LDO Linear Regulator with Reverse Current Protection, High Accuracy 1.0–5.0V Output, 500mA, SOT23-5 Package

The ME6251 is a high-reliability Power Management IC featuring a CMOS type Low Dropout (LDO) linear regulator with built-in reverse current protection. This device is specifically designed to prevent reverse current flow from the output to the input, making it ideal for battery-powered and multi-rail power systems where back-feeding must be avoided.

Operating with an input voltage of up to 6.5V, the ME6251 provides fixed output voltages from 1.0V to 5.0V with ±1% output accuracy. It delivers up to 500mA output current while maintaining a low quiescent current of 40µA, ensuring stable and efficient power regulation.

With a PSRR of 60dB at 1kHz, the ME6251 effectively suppresses input noise, protecting sensitive loads such as MCUs, sensors, and communication modules. The compact SOT23-5 package makes it suitable for space-constrained PCB designs.

Key Specifications

• Input Voltage (VIN): Up to 6.5V

• Output Voltage (VOUT): 1.0V – 5.0V (Fixed)

• Output Current (IOUT): Up to 500mA

• Quiescent Current (IQ): 40µA

• Output Accuracy: ±1%

• PSRR: 60dB @ 1kHz

• Protection Feature: Reverse Current Protection

• Regulator Type: CMOS LDO Linear Regulator

• Package: SOT23-5

Applications

• Battery-powered equipment

• Portable consumer electronics

• Power rail isolation in multi-supply systems

• Microcontroller and sensor power supplies

• Embedded and industrial electronics

Features

• Integrated reverse current protection

• High output voltage accuracy

• Low dropout voltage

• Low quiescent current

• Stable operation with small ceramic capacitors

• Compact SOT23-5 package