LT3958IUHE#TRPBF

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The LT3958IUHE#TRPBF is a PWM, DC-DC synchronous step-down switching regulator that is intended for a wide range of applications. It is one of a range of linear voltage regulator integrated circuits, and is classified as a PMIC – voltage regulator – DC DC switching regulator.

The LT3958IUHE#TRPBF is intended for applications requiring both high current and fast transient output voltage responses. It features a high power efficiency at both light and heavy loads, and a low quiescent current of only 1.7 mA. The output voltage is adjustable from 0.8 to 5.5V, with a choice of either 1.2A or 2A switch current. It also features an integrated power control loop to ensure accurate and stable output voltage.

The LT3958IUHE#TRPBF is designed to operate in a wide range of ambient temperatures, from -20 to +85°C. It has an input voltage range from 2.3V to 5.5V and a wide operating frequency from 200kHz to 1.5MHz. It also features a built-in thermal shutdown for protection against thermal overloading, and current limit protection to ensure reliability.

The LT3958IUHE#TRPBF has a unique working principle that capitalizes on the efficiencies of synchronous rectification. The primary control loop regulates the duty cycle of the switching output to maintain a precise output voltage and frequency. The internal current sense circuitry continuously monitors the current flowing in the external MOSFETs, allowing the LT3958IUHE#TRPBF to accurately adjust the duty cycle to maintain a constant output voltage despite changes in output current. The circuit also utilizes an internal pre-biased voltage mode control loop, which stabilizes the output voltage with a low-impedance energy storage capacitor, improving transient response and minimizing output noise.

The LT3958IUHE#TRPBF features a wide range of features, such as: a low-profile package; a 100% duty cycle to allow low-dropout operation; transient response control; current mode control; and adjustable soft start. It is well-suited for battery-powered systems due to its low quiescent current and high power efficiency. This makes it an ideal choice for a variety of portable, consumer and industrial applications.

In summary, the LT3958IUHE#TRPBF is a high-performance, high-efficiency synchronous DC-DC step-down switching regulator that is well-suited for a variety of applications requiring both high current and fast transient response. Its unique working principle is based on synchronous rectification, and its wide input voltage, adjustable output voltage, and excellent transient response make it an ideal choice for switchmode power supplies, battery-powered systems, and other applications requiring efficient, reliable power conversion.

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