Two-Input and Single-Output Power Multiplexer Switch
Automatic and Manual Input Selection Mode
Supply Voltage Range
1.5 V to 5.5 V 6V abs max
Ultra-Low Supply Current at Operation IQ
4 µA Typ. @ 5.5 VIN
Ultra-Low Stand-by Current ISD
20 nA Typ. @ 5.5VIN
RON
35mΩ Typ. @ 5.5 V IN1 or VIN2 ; 43mΩ Typ. @ 3.3 VIN1 or VIN2
2.5A Continuous Output Current Capability Per Channel
Smart Control Pins
IEN and ISEL: 3 nA Typ at VEN or VSEL > VIH ; REN and RSEL: 500 kΩ Typ
Integrated Output Discharge Switch
No Cross Conduction Between Two Inputs
Reverse Current Blocking when Disabled
Operating Temperature Range
-40 to 85 °C
HBM / CDM
6kV / 2kV
The GLF74521 is an integrated power multiplexer switch with dual independent power switches connected to a single output pin to enable seamless transition between two input sources.
The GLF74521 provides an automatic selection mode as well as a manual selection mode by the combination of the logic input pins of EN and SEL. The EN input pin is used along with the select (SEL) input pin to select the automatic switching function, select VIN1 only, select VIN2 only, or turn both switches off. In the automatic selection mode, the GLF74521 automatically selects the higher input voltage source out of two input DC power supplies.
The GLF74521 features an ultra-efficient IQSmartTM technology that supports the lowest RON, quiescent current (IQ) and shutdown current (ISD) in the industry. Low RON reduces conduction losses, while low IQ and ISD solutions help designers to reduce parasitic leakage current, improve system efficiency, and increase battery lifetime.
The GLF74521 blocks any cross conduction current between two input sources. When the switch is disabled, the GLF74521 prevents the reverse current to the input source from the output at any higher Vout than Vin condition.
The GLF74521 utilizes chip scale package technology with 6 bumps in a 0.97 mm x 1.47 mm x 0.55 mm package size with a 0.5 mm bump pitch.
