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RT9742QGJ5
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Product Detailed Parameters
- Description：IC PWR SWITCH N-CHAN 1:1 SOT23-5
- 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)：500mA
- 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 RT9742QGJ5 is a single N-MOSFET high-side power switch IC designed for USB applications. It features low switch-on resistance and low supply current. The device integrates over-current protection, short fold-back circuitry, thermal shutdown, and under-voltage lockout. A flag output indicates fault conditions to the local USB controller. An embedded delay function prevents misoperation due to inrush current. The part supports flexible applications with available packages including TSOT-23-5 (FC).
Feature Summary
- Integrates comprehensive protection circuits including over-current, short fold-back, thermal shutdown, and under-voltage lockout.
- Provides a flag output signal to indicate fault conditions to the local USB controller.
- Includes an embedded delay function to prevent misoperation caused by inrush current.
Applications
- USB Peripherals
- Notebook PCs
Procurement Notes
Verify the specific package marking and date code against the manufacturer's official documentation to ensure authenticity. Confirm that the ordering suffix matches the required pin configuration and thermal characteristics. Check for any recent revisions or updates to the datasheet that may affect compatibility or performance specifications.
Selection Notes
Select this component for cost-effective, low-voltage USB power supply solutions requiring integrated protection. Consider the low switch-on resistance and supply current for efficiency. Ensure the application environment stays within the specified operating temperature range and voltage limits defined in the technical documentation.
Part Context
The RT9742 series consists of high-side power switches with flag outputs. The RT9742QGJ5 variant specifically utilizes the TSOT-23-5 (FC) package. This family offers various current ratings and on-resistance options to suit different USB peripheral power requirements while maintaining compact form factors.
Replacement Considerations
Consult the manufacturer's official replacement guide for direct substitutes. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.
FAQ
What is the purpose of the flag output?
The flag output indicates fault conditions to the local USB controller.
How does the device handle inrush current?
It integrates an embedded delay function to prevent misoperation due to inrush current.
