LT1373IS8#PBF

The LT1373IS8#PBF is a monolithic DC-DC converter with advanced switch mode design. The device is designed to provide high efficiency voltage regulation and low minimum on-time to reduce total system power losses. The IC is capable of 3MHz switching frequency, making it suitable for applications that require higher switching speeds and the feedback circuit allows up to 500mA current output. The IC has an internal light load detector, enabling improved light-load efficiency when the load current approaches zero.

The LT1373IS8#PBF enables the internal clock to switch on and off in response to load current, allowing a low minimum on-time when the load current is approaching zero. This reduces power losses and helps to maintain high efficiency throughout the operation. The device integrates an internal feedback compensation and an enable control. The feedback current can be connected through an external resistor or an external capacitor, reducing the amount of external components for the application.

The device supports 1.8V to 5.5V output voltage. The current limit can be set by an external resistor. The integrated MOSFETs have a current limit of 2A and an operating voltage up to 45V. The IC provides a DD package so it can be readily combined with other components in a single package.

The LT1373IS8#PBF is suitable for basic step-down applications, allowing users to achieve high efficiency and reduce the amount of external components needed. It is suitable for a wide range of applications, including IoT devices, LED backlighting, networking equipment, Automotive and Point-of-Load (POL) converters.

The working principle of the LT1373IS8#PBF is based on the pulse-width-modulation (PWM) concept. The internal oscillator generates a clock signal that is used to periodically switch the power MOSFETs and control the output voltage. The oscillator frequency is controlled by an internal feedback circuit, which senses the output voltage. When the output voltage rises above the programmed voltage level, the feedback circuit reduces the oscillator frequency and the MOSFETs are switched off for a longer period of time, reducing the output voltage. Similarly, when the output voltage falls, the feedback circuit increases the oscillator frequency, reducing the off-time of the power MOSFETs and increasing the output voltage.

The LT1373IS8#PBF is a versatile PWM DC-DC converter that can be used to regulate voltages in a wide range of applications. The device can be used in linear, buck and boost configurations, and is designed to provide high efficiency, low minimum on-time and a low amount of external components. It provides an ideal solution for portable and low power applications.