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2A USB Power Switch WCSP-4
SGM2578A SGM2578A.pdf

No.10794

FEATURES

? Integrated N-MOSFET Load Switch

1V to 5.5V Input Voltage Range

? Low On-Resistance

   RON = 29mΩ at VIN = 4.35V

   RON = 30mΩ at VIN = 3.3V

   RON = 36mΩ at VIN = 1.0V

? 2A Maximum Continuous Switch Current

? Low Shutdown Current: 90nA (TYP)

? Reverse Current Protection (When Disabled)

? Low Threshold 1.8V GPIO Control Input

? Bidirectional Power Supply for Power Zone Application

? Rise Time:

   SGM2578AAD: 200μs (TYP)

   SGM2578ABD: 5000μs (TYP)

? Quick Output Discharge


? Available in a Green WLCSP-0.9×0.9-4B-A Package

DESCRIPTION

The SGM2578A is a small, ultra-low on-resistance load switch with reverse current protection and controlled turn-on. The load switch contains an N-MOSFET that operates over an input voltage range of 1V to 5.5V and can support a maximum continuous current of 2A.

An integrated N-MOSFET offers a low switch RON. The switch is controlled by ON pin, which is capable of interfacing directly with low voltage control signals. When power is first applied, a smart pull-down is used to keep the ON pin from floating until system sequencing is complete. Once the pin is deliberately driven high (> VIH), the smart pull-down is disconnected to prevent unnecessary power loss. The rise time of the device is controlled internally to avoid inrush current.

The small size and low RON make the device very suitable for space limited, battery powered applications. The wide input voltage range of the switch makes it a versatile solution for many different voltage rails. The controlled rise time of the device greatly reduces inrush current caused by large bulk load capacitances, thereby reducing or eliminating power supply drop. The SGM2578A further reduces the total solution size by integrating a 280Ω pull-down resistor for quick output discharge (QOD) when the switch is turned off.

The SGM2578A is available in a Green WLCSP- 0.9×0.9-4B-A package.

APPLICATION CIRCUIT
PIN CONFIGUTION
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