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PMIC - Voltage Regulators - Special Purpose

A voltage regulator is a device that is used to maintain, stabilize or adjust an output or power supply voltage. The L4952D013TR is a special purpose Smart High Side Power Switch that features an integrated 1A current limited power switch with voltage sensing and loop compensation, as well as integrating loads for load current up to 1.5A. It also has two analog voltage inputs to control the power switch on/off delay. The L4952D013TR is designed with a small package and is capable of driving a wide range of loads, with either low or high efficiency, while providing safety and protection.

Application Field

The L4952D013TR is suitable for applications such as DC-DC converters, DC-AC inverters, solenoid drives, ignition systems and automotive lighting. This power switch can be used in place of a conventional Power MOSFET for improved efficiency, high current limit and current sense features.

Working Principle

The L4952D013TR contains an integrated low-side power switch that allows power to be switched on and off without the need for an external power MOSFET. It is designed to drive loads with high efficiency and minimize power loss. The power switch has two analog voltage inputs that are used to control the on/off delay. The two analog voltage inputs allow for a wide range of delay times to be set, ranging from 8ms to over 4 minutes.

When the on-delay time is reached, the power switch will turn on and allow current to flow to the load. When the off-delay time is reached, the power switch will switch off, cutting off power to the load. The current limit feature allows for current to be limited to 1A, preventing damage to the load. The current sense feature allows for monitoring the current flowing through the load, providing a visual indication to the user when the current has exceeded the set current limit.

The L4952D013TR also has an integrated load current sense. This feature allows for the load current to be monitored in order to ensure that the device is being operated within its intended operating range. The load current sense is used to adjust the power switch on/off time in order to provide a more efficient operation of the power switch and protect against overloading.

Safety and protection are provided by an integrated over temperature and short circuit protection circuit. The over temperature protection will detect when the power switch has exceeded its operating temperature, and will shut down the power switch. The short circuit protection will detect when the load is shorted and will shut down the power switch to prevent damage to the load.

The L4952D013TR is a smart high side power switch that provides an efficient, safe and reliable way to monitor and control power supply voltage. It is well suited for applications such as automotive electronics, DC-DC converters, DC-AC inverters, and ignition systems.

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