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Part No.	US202XG-AF5-R
Manufacturer	UTC
Size	207 Kbytes
Pages	6 pages
Description	100m廓 POWER DISTRIBUTION SWITCHES

Datasheet Summary with AI

# US202 Power Distribution Switch

## Description
️· Power distribution switch for USB applications.
️· Low quiescent current: 23μA
️· N-channel N-MOSFET with no parasitic body diode.
️· Includes current limit, short circuit, soft start, thermal shutdown, and UVLO protection.

## Features
️· Input Voltage: 2.2V to 6V
️· Continuous Current: 1.1A
️· RDS(ON): 100mΩ (typical)
️· Current Limit: 1.5A
️· Low Supply Current: 23μA

## Ordering Information
️· Package: SOT-25
️· Packing: Tape Reel
️· Available in Lead Free and Halogen Free options.

## Pin Configuration
️· 1, 5: VOUT (Output Voltage)
️· 2: GND (Ground)
️· 3: VIN (Power Input)
️· 4: EN (Chip Enable – Active High)

## Electrical Characteristics
️· Input Voltage Range: 2.2V - 6V
️· RDS(ON) (IL = 1A): 85-100mΩ
️· Shutdown Supply Current (CE = “0”): 0.1-1µA
️· UVLO: 1.3-1.8V
️· Thermal Shutdown: 130°C

## Application Notes
️· Use a 1µF ceramic capacitor between VIN and GND for filtering.
️· Use a capacitor from VOUT to GND (minimum 1µF) to prevent voltage spikes and meet USB specifications.
️· Short dual VOUT/VIN pins for reduced resistance.
️· Optimal placement near USB connector for reduced inductance.
️· Thermal shutdown activates at 130°C with 20°C hysteresis.
️· Soft start eliminates voltage droop during hot-plug events.
️· UVLO turns off the switch if VIN drops below 1.8V.
️· Reverse current is prevented by turning off the switch or setting VIN < 1.3V.