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RT9742HGJ5
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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)：70mOhm
- 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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Overview
The RT9742HGJ5 is a single-channel high-side power switch manufactured by Richtek USA Inc. It operates within a supply voltage range of 2.7V to 6V and is housed in a TSOT-23-5 surface-mount package. The device features an on-resistance of 70mΩ and supports a continuous output current of 1A. It includes integrated protection mechanisms such as fixed current limiting, over-temperature shutdown, reverse current blocking, and under-voltage lockout. The component functions with a non-inverting input interface and provides a status flag output.
Feature Summary
- Integrates a high-side N-channel MOSFET for efficient power distribution control.
- Provides active fault monitoring through a dedicated status flag output pin.
- Includes comprehensive protection against over-current, thermal overload, and reverse current flow.
Applications
- USB port power switching and load management
- Peripheral device power sequencing in portable electronics
- Battery-powered equipment load distribution
Procurement Notes
Verify the specific suffix HGJ5 against official Richtek documentation to confirm exact electrical tolerances and marking codes. Ensure compatibility with standard TSOT-23-5 footprints during PCB layout. Confirm moisture sensitivity level requirements for assembly processes. Cross-reference ordering information with authorized distributors to avoid counterfeit components.
Selection Notes
Select this component when a single-channel high-side switch with low on-resistance is required for 5V systems. The 1A current rating suits moderate load applications. Consider the TSOT-23-5 package size for space-constrained designs. Verify that the 2.7V minimum operating voltage aligns with the system's logic levels and battery discharge curves.
Part Context
This part belongs to the RT9742 family of high-side power switches from Richtek. Variants within this series differ primarily in current ratings and on-resistance values, ranging from 0.5A to 3A. The RT9742HGJ5 represents the 1A configuration within this lineup, sharing common protection features and package options with other members like the RT9742AGJ5F and RT9742VGJ5.
Replacement Considerations
Compatible substitutes include RT9742AGJ5F (3A) and RT9742VGJ5 (2A). These parts share the same TSOT-23-5 package and functional interface but offer higher current capabilities. Verify that the increased current rating does not impact thermal design constraints or footprint compatibility.
