ME3103 Power Management IC – 1A Synchronous DC/DC Buck Converter | 2.5–5.5V, 1.5MHz, SOT23-5 DFN2×2-6L

The ME3103 is a high-efficiency Power Management IC integrating a synchronous DC/DC step-down (buck) converter, designed for portable and battery-powered electronics.
It supports a 2.5V to 5.5V input voltage range and provides an adjustable output voltage from 1.2V to 5V using a 0.6V feedback reference.

Operating in automatic PFM/PWM mode, the ME3103 delivers up to 1A output current while maintaining a low quiescent current of 40µA.
Its 1.5MHz switching frequency enables small external components and compact PCB layouts.

Key Specifications

• Input Voltage (VIN): 2.5V – 5.5V

• Output Voltage (VOUT): Adjustable (1.2V – 5V, VFB = 0.6V)

• Output Current (IOUT): Up to 1A

• Quiescent Current (IQ): 40µA

• Switching Frequency (FOSC): 1.5MHz

• Operating Mode: Synchronous PFM / PWM

• Output Accuracy: ±2%

• Packages: SOT23-5, DFN2×2-6L

Applications

• Portable consumer electronics

• Wearable devices

• Battery-powered systems

• Embedded low-voltage rails

Features

• High-efficiency synchronous buck topology

• Ultra-low quiescent current

• Automatic PWM/PFM operation

• 1.5MHz switching frequency

• Compact SMD packages