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RT9742ENGJ5
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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)：1.5A
- 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 RT9742ENGJ5 is a single N-channel high-side power switch IC designed for USB applications. It operates within a voltage range of 2.7V to 6V and delivers a maximum output current of 1.5A. The device features a typical on-resistance of 55mΩ and includes integrated protection circuits such as fixed over-current, thermal shutdown, reverse current blocking, 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, thermal shutdown, and reverse current protection with a status flag output
- Features embedded delay to prevent miss-operation from inrush current
- Supports flexible USB power supply applications with low on-resistance
Applications
- USB power distribution
- Portable electronic devices
- Battery-powered equipment
Procurement Notes
Verify the specific suffix EN against the manufacturer datasheet to confirm the exact current rating and package variant. Ensure compatibility with the target PCB footprint and thermal requirements. Confirm RoHS compliance and moisture sensitivity level before integration into the production line.
Selection Notes
Select this component for applications requiring a single high-side switch with fault indication. The 1.5A rating suits moderate load requirements. Consider the TSOT-23-5 package size for space-constrained designs. Verify that the 2.7V minimum operating voltage aligns with the system's power rail specifications.
Part Context
This part belongs to the RT9742 family of cost-effective, low-voltage high-side power switches. The series offers various current ratings and resistance options to suit different USB application needs. The RT9742ENGJ5 specifically provides a 1.5A capability with a 55mΩ typical on-resistance.
Replacement Considerations
Check for other suffixes within the RT9742 series (e.g., AGJ5F, VGJ5) which offer different current ratings like 3A or 2A. Ensure pinout and package dimensions match if substituting with similar high-side switches from other manufacturers.
