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RT9742CGJ5F
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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)：2A
- 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 (FC)
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Grade：-
- Qualification：-
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Overview
The RT9742CGJ5F is a single-channel high-side power switch IC designed for USB applications. It features an N-MOSFET with a maximum on-resistance of 70 mΩ and a typical resistance of 55 mΩ. The device supports a load current of 1 A with a fixed current limit of 1 A. Operating voltage ranges from 2.7 V to 6 V, with a maximum turn-on time of 2.1 ms. It operates within a temperature range of -40°C to +85°C and is housed in a TSOT-23-5 package.
Feature Summary
- Integrates comprehensive protection circuits including over-current protection, short fold-back, thermal shutdown, and under-voltage lockout.
- Includes a flag output pin to indicate fault conditions to the local controller.
- Features an embedded delay function to prevent misoperation caused by inrush current.
Applications
- USB peripheral power supply
- Notebook PC power distribution
Procurement Notes
Verify the specific suffix CGJ5F against official Richtek documentation to confirm the exact current rating and package variant. Ensure compatibility with the target PCB footprint for the TSOT-23-5 form factor. Confirm RoHS compliance status through the manufacturer's declaration before finalizing procurement orders.
Selection Notes
Select this component when a single-channel high-side switch with integrated fault indication is required. The 1 A current limit suits standard USB peripheral loads. Consider the 70 mΩ on-resistance for efficiency calculations. The embedded delay feature simplifies design by mitigating inrush current issues without external components.
Part Context
This part belongs to the RT9742 family of low-voltage, cost-effective power switches. The family offers various current ratings and resistance options across different packages like SOT-23-3 and TSOT-23-5 (FC). The RT9742 series is optimized for flexible USB power management solutions requiring robust protection features.
Replacement Considerations
Other variants within the RT9742 family, such as RT9742AGJ5F or RT9742VGJ5F, may serve as functional substitutes if their current ratings align with system requirements. Verify pinout compatibility and electrical parameters before substitution.
