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RT9742GNGJ5F
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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)：1A
- 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 (FC)
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Grade：-
- Qualification：-
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Overview
The RT9742GNGJ5F 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 features an output current capability of 1A. The device integrates a low on-resistance of 70mΩ and includes comprehensive 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 over-current, short fold-back, thermal shutdown, and under-voltage lockout protection
- Provides a flag output to indicate fault conditions to the local controller
- Includes an embedded delay function to prevent miss-operation from inrush current
Applications
- USB peripherals
- Notebook PCs
Procurement Notes
Verify the specific suffix 'GNGJ5F' against official Richtek documentation to confirm pinout and electrical parameters, as variations exist within the RT9742 family. Ensure compatibility with the target PCB footprint, typically TSOT-23-5. Confirm RoHS compliance status through the manufacturer's declaration before finalizing procurement specifications.
Selection Notes
Select this component for cost-effective, low-voltage USB power distribution requiring single-channel control. It is suitable for designs needing integrated fault indication via the flag output and robust protection against thermal and electrical overstress. Consider the 70mΩ on-resistance for efficiency requirements and the 1A current limit for load capacity.
Part Context
The RT9742 series comprises low-voltage, single N-MOSFET high-side power switches optimized for USB applications. These ICs are designed to provide low switch-on resistance and low supply current. The family offers flexible packaging options including TSOT-23-5, TSOT-23-5 (FC), and SOT-23-3 to support various board space constraints.
Replacement Considerations
Check datasheets for alternative part numbers within the RT9742 series, such as RT9742AGJ5F or RT9742ENGJ5F, to verify if differences in on-resistance (55mΩ vs 70mΩ) or current ratings (1.5A/3A vs 1A) align with design requirements.
