RT9742BGJ5F

$0.86

Description：IC PWR SWITCH N-CH 1:1 TSOT23-5
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:e5fba5d84519 Category: Power Distribution Switches, Load Drivers Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC PWR SWITCH N-CH 1:1 TSOT23-5
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR),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)：3A
Rds On (Typ)：55mOhm
Input Type：Non-Inverting
Features：Load Discharge, 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 (FC)
Package / Case：SOT-23-5 Thin, TSOT-23-5
Grade：-
Qualification：-

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RT9742BGJ5F

Overview

The RT9742BGJ5F is a high-side power switch IC from Richtek, designed for USB power distribution applications. It features an N-channel output with a maximum continuous current of 3A and a typical on-resistance of 55 mOhms. The device operates within a supply voltage range of 2.7V to 6V and is housed in a TSOT-23-5 package. It includes integrated fault protection mechanisms such as fixed current limiting, overtemperature shutdown, reverse current blocking, and under-voltage lockout (UVLO). The component supports non-inverted input control and provides a status flag feature.

Feature Summary

Integrated load release and status flag functionality for system monitoring
Comprehensive fault protection including fixed current limit, thermal shutdown, and reverse current blocking
High-side N-channel configuration optimized for USB switching applications

Applications

USB power distribution networks
Portable electronic device power management
Battery-powered equipment load switching

Procurement Notes

Verify the specific suffix 'J5F' against the manufacturer's datasheet to confirm pinout compatibility and RoHS compliance status. Ensure the ordering information matches the required tape-and-reel or cut-tape packaging format. Cross-reference the active part status with the latest Richtek documentation to avoid obsolete variants.

Selection Notes

Select this component when a 3A high-side switch with low on-resistance is required for USB applications. The inclusion of a status flag allows for remote fault detection without additional circuitry. Consider the TSOT-23-5 package size for space-constrained designs requiring surface-mount assembly.

Part Context

The RT9742 series comprises cost-effective high-side power switches tailored for USB port protection and distribution. This specific variant belongs to the family offering 3A capability with enhanced protection features. It serves as a key power management integrated circuit (PMIC) component for managing load connections in consumer electronics.