LFC789D25CPWR Integrated Circuits (ICs)

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Linear regulator controllers are a type of power management integrated circuit, or PMIC, used to provide a regulated output current or voltage. The output is typically lower than the input voltage and is independent of the load. The LFC789D25CPWR is a linear regulator controller that offers a wide input range and low quiescent current. It is designed for a variety of applications, from battery-powered to high-current industrial and automotive applications.

Features of the LFC789D25CPWR

• Wide input range: 4.5 V to 28 V
• Low quiescent current: 6 μA typically operation in PWM mode
• High-speed operation with minimum loading: 1 MHz typ.
• Fast response to output voltage overload: 1 μs typ.
• Output voltage adjustable from 0.5 V to 28 V
• Output current limitation
• Thermal shutdown
• Manufactured with TSMC’s advanced low noise 0.18 μm CMOS technology

The LFC789D25CPWR includes all the necessary circuitry for a typical switching power supply on a single chip, including the power MOSFETs and support components, regulator control and feedback, and protection functions. It supports very fast dynamic performance and can operate up to 1 MHz with maximum loading.

Applications of the LFC789D25CPWR

The LFC789D25CPWR is ideal for battery-powered applications as well as high-current industrial and automotive applications. Because of its wide input range and low quiescent current, it is suitable for a wide variety of applications, including:

• Portable power supplies
• PC motherboards and server boards
• GPS and navigation systems
• Voltage converters
• Industrial equipment
• Automotive applications
• Telecommunications equipment

How the LFC789D25CPWR Works

The LFC789D25CPWR features a voltage control loop with an external voltage reference and output feedback circuit. The external voltage reference sets the output voltage and the feedback is used to adjust the output voltage to compensate for errors induced by the load current. The voltage control loop uses two main components, a voltage reference and an error amplifier. The voltage reference is used to set the output voltage, while the error amplifier is used to sense and amplify any differences between the reference voltage and the output voltage. The amplified difference is then used to adjust the output voltage by controlling the power MOSFET gate voltage.

The LFC789D25CPWR also features short-circuit protection, over-voltage protection, over-temperature protection, and current limitation. It also supports soft-start and fault protection, which prevents the output from quickly ramping up to the set voltage, and limits the output current in the event of an overload or short-circuit.

Conclusion

The LFC789D25CPWR is a linear regulator controller designed for a variety of applications. It offers a wide input range and low quiescent current, which makes it ideal for battery-powered and high-current applications. It also features current limiting, voltage adjustment, thermal shutdown and fault protection, making it a reliable power management solution.

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