RT9742HGJ5F

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

SKU:b3db1a81881b Category: Power Distribution Switches, Load Drivers Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC PWR SWTCH N-CHAN 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)：1A
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
Package / Case：SOT-23-5 Thin, TSOT-23-5
Grade：-
Qualification：-

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RT9742HGJ5F

Overview

The RT9742HGJ5F is a single N-channel 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 3A with a typical on-resistance of 55mΩ. The device features fixed current limiting, over-temperature protection, reverse current blocking, and UVLO. It includes a status flag output and is housed in a TSOT-23-5 package.

Feature Summary

Integrated N-channel high-side switch optimized for USB load distribution
Built-in fault protection including fixed current limit, thermal shutdown, and reverse current blocking
Status flag output indicates operational state or fault conditions

Applications

USB port power switching
Peripheral device power management
Battery-powered equipment load control

Procurement Notes

Verify the specific suffix HGJ5F against the manufacturer datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure compatibility with the required operating temperature range of -40°C to +85°C. Confirm RoHS compliance status if environmental regulations apply to your assembly process.

Selection Notes

Select this component when a compact, cost-effective solution for single-channel USB power switching is needed. The 55mΩ on-resistance minimizes power loss at 3A loads. Consider the TSOT-23-5 package size for space-constrained PCB layouts. Verify that the input voltage range aligns with the system's power supply rails.

Part Context

The RT9742 series comprises low-voltage, single N-MOSFET high-side power switches intended for USB applications. These ICs integrate protection features to safeguard connected devices from overcurrent and overheating. The family offers various current ratings and resistance options to suit different power distribution needs.