ME2139 Power Management IC – 3A DC/DC Step-Up Converter | 0.9–6V, 1MHz, SOT23-5

The ME2139 is a high-current DC/DC step-up (boost) converter controller designed for applications requiring higher output power by using an external NMOS power transistor.
It operates from a 0.9V to 6V input voltage range and supports adjustable output voltages up to 20V through a 1.25V feedback reference.

With PFM/PWM operation and a 1MHz switching frequency, the ME2139 can deliver up to 3A output current, offering ±2% output accuracy and enabling compact, high-efficiency boost power designs such as 3.6V to 5V conversion.

Key Specifications

• Input Voltage (VIN): 0.9V – 6V

• Output Voltage (VOUT): Adjustable (<20V, VFB = 1.25V)

• Output Current (IOUT): Up to 3A

• Switching Frequency (FOSC): 1MHz

• Operating Mode: PFM / PWM

• Topology: External NMOS

• Output Accuracy: ±2%

• Package: SOT23-5

Applications

• High-current boost converters

• Portable power supplies

• Embedded systems

• Battery-powered equipment

Features

• Supports high output current with external MOSFET

• High switching frequency for compact designs

• Wide adjustable output voltage range

• Stable mixed-mode control