RT9742DNGJ5F

Description：IC PWR SWITCH N-CHAN 1:1 SOT23-5
Series：-
Mfr：Richtek USA Inc.
Package：Cut Tape (CT)

SKU:0900117c2ce2 Category: Power Distribution Switches, Load Drivers Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC PWR SWITCH N-CHAN 1:1 SOT23-5
Series：-
Mfr：Richtek USA Inc.
Package：Cut Tape (CT)
Switch Type：USB Switch
Number of Outputs：1
Ratio - Input:Output：1:01
Output Configuration：High Side
Output Type：N-Channel
Interface：On/Off
Voltage - Load：2.7V ~ 6V
Voltage - Supply (Vcc/Vdd)：Not Required
Current - Output (Max)：2A
Rds On (Typ)：55mOhm
Input Type：Non-Inverting
Features：Status Flag
Fault Protection：Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Supplier Device Package：TSOT-23-5
Package / Case：SOT-23-5 Thin, TSOT-23-5
Grade：-
Qualification：-

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RT9742DNGJ5F

Overview

The RT9742DNGJ5F is a single N-MOSFET high-side power switch IC designed for USB applications. It operates within a supply voltage range of 2.7V to 6V and supports an output current of 1.5A. The device features a typical on-resistance of 55mΩ and includes integrated protection circuits such as over-current, short fold-back, thermal shutdown, and under-voltage lockout. A flag output indicates fault conditions, while an embedded delay function prevents inrush current issues. It is housed in a TSOT-23-5 package.

Feature Summary

Integrates comprehensive fault protection including fixed current limit, thermal shutdown, and reverse current blocking.
Provides a status flag output to signal fault conditions to the local controller.
Features an embedded delay function to prevent misoperation caused by inrush currents.

Applications

USB power supply distribution
Portable electronic devices
Peripheral equipment

Procurement Notes

Verify the specific suffix 'DNGJ5F' against official Richtek documentation to confirm pinout and electrical parameters. Ensure the component matches the required 1.5A current rating and 55mΩ on-resistance specifications for your design. Confirm RoHS compliance and moisture sensitivity level requirements before procurement.

Selection Notes

Select this component for applications requiring a cost-effective, low-voltage high-side switch with integrated protection. It is suitable where space is limited due to its small TSOT-23-5 package. Consider the 1.5A current limit and 55mΩ resistance when designing for load requirements.

Part Context

The RT9742 series comprises single-channel high-side power switches optimized for USB interfaces. Variants differ in current ratings (0.5A to 3A) and on-resistance (55mΩ or 70mΩ). The RT9742D variant specifically provides a 1.5A output capability, balancing performance and efficiency for standard USB loads.