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RT9742MNGJ5
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Product Detailed Parameters
- Description：IC PWR SWTCH N-CHAN 1:1 TSOT23-5
- Series：-
- Mfr：Richtek USA Inc.
- Package：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)：1.5A
- Rds On (Typ)：70mOhm
- Input Type：Non-Inverting
- Features：-
- 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 RT9742MNGJ5 is a single N-channel high-side power switch IC designed for USB applications, manufactured by Richtek USA Inc. It operates within a supply voltage range of 2.7 V to 6 V and features an ultra-low on-resistance of 55 mΩ typical value. The device integrates comprehensive protection mechanisms including fixed current limiting, thermal shutdown, reverse current blocking, and under-voltage lockout (UVLO). A flag output pin provides fault indication to the host controller. The component utilizes an embedded delay function to mitigate inrush current issues and is housed in a TSOT-23-5 package.
Feature Summary
- Integrates over-current protection with short fold-back circuitry and thermal shutdown for robust fault management
- Includes a dedicated flag output pin to signal fault conditions directly to the local USB controller
- Features an embedded delay function to prevent misoperation caused by inrush currents during startup
Applications
- USB peripheral power distribution
- Notebook PC power switching
- Portable electronic device load switching
Procurement Notes
Verify the specific suffix 'MNGJ5' against official Richtek documentation to confirm exact electrical parameters such as current rating and resistance values, as these vary across the RT9742 family. Ensure compatibility with required operating temperatures and package specifications before procurement.
Selection Notes
Select this component for applications requiring low conduction loss and integrated fault protection in compact spaces. Consider the TSOT-23-5 package size and the necessity for a status flag output when designing USB power paths that require monitoring capabilities.
Part Context
The RT9742 series comprises cost-effective, low-voltage high-side power switches optimized for USB interfaces. Variants within the family offer different current ratings and resistance values while maintaining consistent protection features and packaging options like TSOT-23-5 and SOT-23-3.
Replacement Considerations
Publicly confirmed substitute part numbers for the RT9742MNGJ5 are not available in the provided source material. Consult official manufacturer cross-reference lists for verified alternatives.
