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RT9742DGJ5
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Product Detailed Parameters
- Description：IC PWR SWITCH N-CHAN 1:1 SOT23-5
- 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 RT9742DGJ5 is a single-channel high-side power switch from Richtek, designed for power distribution applications. It operates within a supply voltage range of 2.7V to 6V and features an N-channel output configuration housed in a TSOT-23-5 package. The device supports a maximum continuous output current of 1A with a fixed current limit of 1A. Its on-resistance is specified at a maximum of 70mΩ, while the typical on-resistance is 55mΩ. The component includes a status flag output and integrates comprehensive protection mechanisms including over-current, thermal shutdown, reverse current blocking, and under-voltage lockout.
Feature Summary
- Integrates a status flag output to indicate operational state or fault conditions
- Provides robust protection against over-current, thermal overload, reverse current flow, and under-voltage lockout
- Features low on-resistance for efficient power delivery in compact surface-mount packaging
Applications
- USB port power switching and protection
- Peripheral power distribution in portable electronics
- Battery-powered device load switching
Procurement Notes
Verify the specific suffix 'DGJ5' against official Richtek documentation to confirm pinout compatibility and electrical tolerances. Ensure the selected variant matches the required current rating and package type for your PCB layout. Cross-reference datasheet revisions to confirm RoHS compliance and material declarations prior to final procurement.
Selection Notes
Select this component when a single-channel high-side switch with integrated fault indication is required. The 1A current rating suits moderate load applications. Consider the 70mΩ maximum on-resistance for efficiency calculations. The TSOT-23-5 package is suitable for space-constrained designs requiring surface-mount assembly.
Part Context
The RT9742 series comprises cost-effective high-side power switches with various current ratings. The DGJ5 variant specifically denotes the 1A version within this family. These devices are engineered for USB and general power distribution tasks, offering a balance of performance and integration in a small footprint.
Replacement Considerations
Check for direct substitutes within the RT9742 family such as RT9742AGJ5F (3A) or RT9742EGJ5F (1.5A) if higher current capacity is acceptable. Verify that alternative parts maintain the same TSOT-23-5 footprint and control logic compatibility.
