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RT9742DGJ5F
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Product Detailed Parameters
- Description：IC PWR SWITCH N-CHAN 1:1 SOT23-5
- 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)：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
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Grade：-
- Qualification：-
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Overview
The RT9742DGJ5F is a single N-channel MOSFET high-side power switch IC designed for USB applications. It operates within a supply voltage range of 2.7 V to 6 V and features a maximum on-resistance of 70 mOhms. The device provides a fixed current limit of 1.5 A and supports a maximum output current of 1.5 A. It includes protection mechanisms such as over-temperature, reverse current, and UVLO. The component is housed in a TSOT-23-5 package and functions across an operating temperature range of -40°C to +85°C.
Feature Summary
- Integrates a single N-channel high-side power switch with status flag output
- Includes comprehensive fault protection against over-temperature, reverse current, and under-voltage lockout
- Features fixed current limiting for load protection
Applications
- USB port power distribution
- Load switching in portable electronics
- Power management circuits requiring high-side control
Procurement Notes
Verify the specific suffix DGJ5F to confirm the 1.5 A current rating variant. Ensure compatibility with the TSOT-23-5 footprint during PCB layout. Confirm moisture sensitivity level requirements for storage and reflow soldering processes. Cross-reference the datasheet for exact pinout definitions relative to other RT9742 family members.
Selection Notes
Select this part when a 1.5 A high-side switch with integrated flag functionality is required. Compare against variants like RT9742AGJ5F (3 A) or RT9742GGJ5 (1 A) based on specific load current needs. Consider the 70 mOhm on-resistance for thermal performance analysis. Verify that the 2.7 V minimum operating voltage aligns with the system's power rail.
Part Context
The RT9742 series comprises cost-effective, low-voltage power switches optimized for USB applications. This specific model belongs to the RT9742 family, which offers various current ratings from 0.5 A to 3 A. All variants share similar protection features and packaging, differing primarily in their current handling capabilities and internal resistance values.
Replacement Considerations
Direct substitutes include other RT9742 variants with matching pinouts if current ratings differ, such as RT9742EGJ5 (1.5 A) or RT9742VGJ5 (2 A). Verify that the replacement maintains the same TSOT-23-5 package and electrical characteristics.
