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RT9742FNGJ5
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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)：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 RT9742FNGJ5 is a single N-MOSFET high-side power switch IC designed for USB applications. It features a typical on-resistance of 70mΩ and supports load currents up to 1.5A. The device operates within a voltage range of 2.7V to 6V and includes an active status flag output. It utilizes a TSOT-23-5 surface-mount package and maintains a low quiescent current of 0.03mA.
Feature Summary
- Integrates a single N-channel MOSFET with a 70mΩ on-resistance for efficient power distribution
- Provides an active status flag output to indicate the operational state of the switch
- Designed specifically for cost-effective USB application power management
Applications
- USB port power switching
- High-side load protection circuits
- Power distribution in portable electronic devices
Procurement Notes
Verify the specific suffix NGJ5 against the manufacturer's official datasheet to confirm pinout compatibility and thermal characteristics. Ensure the operating temperature range of -40°C to 85°C aligns with your system requirements. Confirm RoHS compliance status through the supplier's documentation before finalizing procurement.
Selection Notes
Select this component when a compact, single-channel high-side switch is required for USB interfaces. The 70mΩ resistance offers a balance between conduction loss and cost. Consider the TSOT-23-5 package size for space-constrained designs. Verify that the 2.7V minimum supply voltage meets the system's logic levels.
Part Context
This part belongs to Richtek's family of low-voltage power switches. It serves as a discrete solution for protecting downstream loads from overcurrent conditions while providing status feedback. The integration of the MOSFET and control logic simplifies circuit design compared to discrete implementations.
Replacement Considerations
Check for exact pin-compatible alternatives such as the RT9742A series variants. Ensure substitute parts maintain the same 70mΩ Rds(on) and 1.5A current rating. Verify that the replacement also includes the active flag feature if system monitoring is required.
