RT9742ENGJ5F Integrated Circuits (ICs)

Voltage - Load:	2.7 V ~ 6 V
Supplier Device Package:	TSOT-23-5 (FC)
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Operating Temperature:	-40°C ~ 85°C (TA)
Fault Protection:	Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
Features:	Status Flag
Input Type:	Non-Inverting
Rds On (Typ):	55 mOhm
Current - Output (Max):	1.5A
Voltage - Supply (Vcc/Vdd):	Not Required
Series:	--
Interface:	On/Off
Output Type:	N-Channel
Output Configuration:	High Side
Ratio - Input:Output:	1:1
Number of Outputs:	1
Switch Type:	USB Switch
Part Status:	Active
Packaging:	Tape & Reel (TR)

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RT9742ENGJ5F is a power management switch controller and load driver that provides system-level power control and protection. It is specifically designed for applications where high efficiency and clean switching are required. The device integrates advanced power MOSFET switches, a chopper-stabilized pre-driver, embedded dynamic current limiting and thermal shutdown protection, and other features to enable fast and reliable output control, making it suitable for power systems used in a variety of industrial, automotive, and consumer applications.

Features

The main features of the RT9742ENGJ5F include:

• Integrates 6-channel power MOSFET switches with low rDS(ON) and high current handling capability.
• 4.4V to 28.4V input voltage range for load power.
• Chopper-stabilized pre-driver for fast and reliable output control.
• Average output current limit to prevent over-current damage.
• Thermal shutdown protection for safe operation.
• Programmable current limit and thermal shutdown levels.
• Integrated slew rate control for uniform and stable output.

Application

The RT9742ENGJ5F is well suited to a variety of applications including:

• Automotive power systems including engine and transmission control, battery monitor, car multimedia, HVAC, and LED lighting.
• Industrial power systems including motor and valve control, solenoid and actuator control, power monitoring and control.
• Consumer applications including power supplies, portable devices, and home appliances.

Working Principle

The RT9742ENGJ5F works to control and protect the system from over-current and thermal overload. The integrated MOSFET switches are used to provide up to 6 channels of power and a pre-driver to control the output voltage. When the load current exceeds the current limit set point, the pre-driver will turn off the MOSFET switch, thereby cutting off power to the load. This prevents further current over-load and potential damage. Similarly, when the temperature exceeds the mandated Thermal shutdown level set point, the pre-driver will again turn off the MOSFET switch, thereby cutting off power to the load. In addition, the device has integrated slew rate control which helps to ensure that the output voltage rises or falls uniformly and correctly. This helps to reduce the risk of oscillation. Overall, the RT9742ENGJ5F is a highly integrated power management switch controller and load driver that is designed for applications which require high efficiency and clean switching. The device provides system-level power control and protection via its integrated MOSFET switches, pre-driver, current limiting and thermal shutdown protection, and slew rate control. The device can be used in a variety of automotive, industrial, and consumer applications.

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