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RT9742GNGJ5
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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)：1A
- Rds On (Typ)：70mOhm
- 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
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Grade：-
- Qualification：-
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Overview
The RT9742GNGJ5 is a single-channel, low-voltage N-MOSFET high-side power switch IC designed for USB applications. It features a maximum on-resistance of 70 mΩ and supports an output current of 1 A. The device operates within a supply voltage range of 2.7 V to 6 V and includes integrated protection circuits such as over-current protection, short fold-back, thermal shutdown, and under-voltage lockout. A flag output indicates fault conditions, while an embedded delay function prevents inrush-current misoperation. It is housed in a TSOT-23-5 package.
Feature Summary
- Integrates comprehensive fault protection including over-current, short fold-back, thermal shutdown, and UVLO.
- Provides a status flag output to signal fault conditions to the local controller.
- Features an embedded delay function to prevent operation errors caused by inrush current.
Applications
- USB power supply distribution
- Portable electronic device power management
- High-side load switching
Procurement Notes
Verify the specific suffix GNGJ5 against official Richtek documentation to confirm pinout and electrical parameters. Ensure compatibility with the target PCB footprint, specifically the TSOT-23-5 package dimensions. Confirm moisture sensitivity level requirements for assembly processes. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.
Selection Notes
Select this component for applications requiring a cost-effective, single-channel high-side switch with integrated protection. The 1 A current rating and 70 mΩ resistance suit standard USB peripheral loads. Consider the flag output requirement for system monitoring. Evaluate the TSOT-23-5 package size constraints against available board space. Compare with other RT9742 variants if different current ratings or packaging options are needed.
Part Context
The RT9742 series comprises low-voltage, single N-MOSFET high-side power switches optimized for USB applications. Variants differ primarily in current ratings (ranging from 0.5 A to 3 A) and on-resistance values. The family integrates similar protection features and control interfaces, offering flexibility for various power distribution needs in portable electronics.
Replacement Considerations
Other RT9742 variants with matching 1 A current ratings and TSOT-23-5 packages may serve as substitutes. Verify equivalent on-resistance and protection thresholds before substitution.
