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GLF4002

Ultra-low IQ, Asymmetrical Power Mux IC with Auto & Manual Input Selection

home Product Power Mux IC GLF4002
Product Features

  • Two-Input and Single-Output Power Multiplexer Switch

  • Auto and Manual Input Selection Mode

  • Wide Input Range

    1.5 V to 4.5 V

  • Low RON

    Channel 1, VIN1 = 22 mΩ Typ at 4.5 VIN ；Channel 2, VIN2 = 41 mΩ Typ at 4.5 VIN

  • IOUT Max

    Channel 1 = 2 A ；Channel 2 = 1.5 A

  • Ultra-Low Supply Current at Operation

    IQ: 1 μA Typ at 4.5 VIN

  • Ultra-Low Stand-by Current

    ISD: 400 nA Typ at 4.5 VIN

  • Reverse Current Blocking

  • Operating Temperature Range

    -40 °C to 85 °C

GLF4002
Product manual
Sample application
Product Description

The GLF4002 is an integrated power multiplexer IC with dual independent power switches connected to a single output pin to enable seamless transition between two input sources. The GLF4002 features asymmetrical power FET characteristics. Channel 1 (VIN1) provides lower conduction resistance to support 2 A continuous current capability. The current rating of another channel (VIN2) is 1.5 A. It is an ideal solution for a power system with an internal back up power source.


The GLF4002 provides an automatic selection mode and a manual selection mode. The switching of these two modes is executed by combining the EN and SEL pin settings. The EN input pin has an internal threshold voltage to offer a preference to select the channel 1 (VIN1) power source. In the automatic input selection mode, the GLF4002 automatically selects a higher input voltage source between two input power sources.


The GLF4002 prevents cross conduction current between two input sources. When VOUT is higher than VIN, the GLF4002 prevents the reverse current from the output to the input, no matter which input supply is applied.