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RT9742CGJ5
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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)：2A
- 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 RT9742CGJ5 is a single N-channel high-side power switch IC designed for USB applications. It features a maximum on-resistance of 70mΩ and a current limit of 1A. The device operates within a load voltage range of 2.7V to 6V and requires no supply voltage (Vcc/Vdd). Key electrical parameters include a maximum turn-on time of 2.1ms and an operating temperature range from -40°C to +85°C. It is housed in a TSOT-23-5 package.
Feature Summary
- Integrates over-current protection, short fold-back circuit, thermal shutdown, and under-voltage lockout.
- Includes a flag output pin to indicate fault conditions to the local USB controller.
- Features an embedded delay function to prevent misoperation caused by inrush current.
Applications
- USB power supply distribution
- Portable electronic devices
- Smart home appliances
Procurement Notes
Verify the specific suffix 'CGJ5' against official Richtek documentation to confirm the exact current rating and resistance variant, as the RT9742 series includes multiple configurations. Ensure the source document explicitly lists this part number rather than a generic family member. Confirm RoHS compliance status and moisture sensitivity level details directly from the manufacturer's datasheet before procurement.
Selection Notes
Select this component when a single-channel high-side switch with integrated fault indication is required for low-voltage USB loads. The 1A current limit and 70mΩ on-resistance suit moderate power applications. Consider the TSOT-23-5 package size for space-constrained designs. Verify that the 2.7V to 6V load voltage range aligns with the system requirements.
Part Context
The RT9742 series comprises cost-effective, low-voltage high-side power switches optimized for USB applications. Available in various current ratings and packages including TSOT-23-5 and SOT-23-3, these ICs integrate comprehensive protection circuits. The CGJ5 designation identifies a specific variant within this family, distinguished by its 1A current limit and 70mΩ on-resistance characteristics.
Replacement Considerations
Publicly confirmed substitute part numbers for the RT9742CGJ5 are not available in the provided reference material. Designers should consult official cross-reference guides or contact the manufacturer for verified alternatives.
