LTC1147LCS8#TRPBF

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Introduction: LTC1147LCS8#TRPBF is a monolithic, high efficiency synchronous DC-DC step-down controller featuring Low IQ operation and has built-in current mode control. This DC-DC controller is easy to design with and requires only 3 external components for the power supply design. The LTC1147LCS8#TRPBF is ideally suited for low voltage, high current applications and can be used for a variety of applications such as: Portable and desktop computers, power management, supply volumes, industrial systems, and LED lighting applications.

Application Field: The LTC1147LCS8#TRPBF belongs to PMIC - Voltage Regulators and DC DC Switching Controllers. It is a high-efficiency synchronous DC-DC step-down controller that is easy to use and requires only 3 external components for the power supply design. It features low quiescent current and can be used in low voltage, high current applications. This DC-DC controller is ideal for creating a power supply for portable and desktop computers, power management and volume controls, industrial systems, and LED lighting applications. It has built-in current mode control and has a switching frequency of up to 500kHz.

Working Principle: The LTC1147LCS8#TRPBF synchronous DC-DC step-down controller works in the same manner as other synchronous step-down DC-DC controllers. The controller includes an internal oscillator, PWM controller, error amplifier and current limit. The oscillator provides the clock signal, timing the switching of the power MOSFET. The input voltage is compared to a reference voltage and the resulting error signal is amplified and passed to the PWM comparator. The comparator monitors the current through the power MOSFET and, when a predetermined current limit is reached, it terminates the PWM signal, parking the power MOSFET in the off state. The temperature compensation of the output voltage is largely influenced by a feedback path.

Pros and Cons: The LTC1147LCS8#TRPBF is a versatile DC-DC synchronous step-down controller that comes with a few advantages and disadvantages. The controller has low quiescent current which allows for efficient switching without drawing too much power. It also requires only 3 external components for the power supply design. Among its disadvantages, the controller has a slower switching frequency compared to other synchronous DC-DC controllers, which can lead to higher output voltage ripple and voltage noise at low output currents.

Conclusion: The LTC1147LCS8#TRPBF is a DC-DC synchronous step-down controller that is well-suited to low voltage, high current applications. It is easy to design with and has low quiescent current. It is an ideal choice for creating power supplies for portable and desktop computers, power management and volume controls, industrial systems, and LED lighting applications. Due to its slower switching frequency, however, there can be some issues with voltage noise at low output currents. Nonetheless, the LTC1147LCS8#TRPBF is a versatile DC-DC controller that can be used for a variety of applications.

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