RT7257BHZSP

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RT7257BHZSP is a high performance, low noise DC-DC switch mode regulator from Richtek Technology Corporation. With a voltage range of 1.3V to 5.5V and a maximum output current of 3.2A, RT7257BHZSP can provide a wide range of applications. In addition, RT7257BHZSP features an adjustable soft-start function and enable function that are suitable for many different applications.

Application Field

RT7257BHZSP is suitable for powering various types of analog circuits, including LCD panel drivers, audio amplifiers and motor drivers. RT7257BHZSP also contains a power-saving mode which can reduce the power consumption when lower output current is required.

RT7257BHZSP is an ideal choice for PC peripherals such as optical disk drives, USB ports, and wireless adaptors. It can also be used for portable electronic devices such as cell phones, PDAs, and digital cameras.

Working Principle

RT7257BHZSP uses a PWM control architecture with two N-channel high side and low side MOSFETs to regulate the output voltage. A feedback loop adjusts the internal PWM switching frequency to maintain a constant output voltage. RT7257BHZSP also includes an output voltage level detection function which prevents excessive current flow when the output voltage reaches the over-voltage protection level.

RT7257BHZSP also provides dynamic thermal protection, input over-voltage protection and current limit functions to maximize system reliability. By using RT7257BHZSP, customers can reduce the number of external components on their application and reduce total system cost.

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