Two-Input and Single-Output Power Multiplexer IC
Auto and Manual Input Selection Mode
VIN1 Priority Selection Mode
Wide Input Range: 1.5 V to 4.8 V
Low RON
Channel 1, VIN1 = 45 mΩ Typ at 4.8 VIN1 ; Channel 2, VIN2 = 77 mΩ Typ at 4.8 VIN2
IOUT Max
Channel 1 = 2.0 A ; Channel 2 = 1.5 A
Ultra-Low Supply Current at Operation
IQ : 1.1 μA Typ at 4.8 VIN
Ultra-Low Stand-by Current
ISD : 400 nA Typ at 4.8 VIN
Reverse Current Clocking
Operating Temperature Range
-40 °C to 85 °C
The GLF4003 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 GLF4003 features asymmetrical power FET characteristics. Channel 1 (VIN1) provides lower conduction resistance to support 2.0 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 GLF4003 provides an automatic selection, a manual selection and VIN1 priority selection mode. The switching of these three 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 GLF4003 automatically selects a higher input voltage source between two input power sources.
The GLF4003 prevents cross conduction current between two input sources. When VOUT is higher than VIN, the GLF4003 prevents the reverse current from the output to the input, no matter which input supply is applied.
