RT9742LNGV Integrated Circuits (ICs)

RT9742LNGV Application Field and Working Principle

RT9742LNGV is a common Power Distribution Switches, Load Drivers featured in PMIC - Power Distribution Switches, Load Drivers. It is a single-channel, high-side power switch with an integrated load dump protection circuit. It integrates a low on-resistance PMOS with a diodes protection circuit, allowing the switch to sustain over-voltage up to 35V.

RT9742LNGV has the following applications and performance features:

• It is suitable for high-side switching.
• It is ideal for automotive applications and industrial controls.
• Its internal load dump protection circuit eliminates the need for external clamping components.
• Its on-resistance internal current limiting circuitry minimizes current consumption.
• It can be used for automotive xenon bulb ballast and LED lighting.

Now let\'s focus on RT9742LNGV\'s working principle. The RT9742LNGV typically works at a voltage range from 2.2V to 25V. The gate voltage (VGS) is connected to the Logic Input pin, which internally has a pull-up resistor to 5V. When the device is in the OFF state and the inverted logic, the gate voltage is pulled to a voltage less than VON, which makes the switch open. When the device is in the ON state and with the non-inverted logic, the gate voltage is pulled up to 5V, which makes it turn into the saturation region and the switch is closed.

The RT9742LNGV also features a load dump protection circuit, which is enabled when the input voltage exceeds the minimum VLD voltage. When the minimum VLD voltage is exceeded, the switch is disabled and the PMOS transistor is shut off. This prevents damage to the IC and other associated components.

In summary, the RT9742LNGV is a high-side PMOS switch powered by a single voltage source that is capable of sustaining over-voltage up to 35V. It is suitable for high-side switching and is ideal for automotive applications and industrial controls. Its own integrated load dump protection circuitry eliminates the need for external clamping components, thus minimizing the under-voltage protection circuitry costs. With its low on-resistance, it can be used for automotive xenon bulb ballast and LED lighting.