LT8303IS5#TRPBF

Introduction

The LT8303IS5#TRPBF is a synchronous step-down regulator designed to deliver up to 5A of continuous output current while operating from a wide input voltage range of 3.2V to 24V. The switching frequency can be programmed up to 2.5MHz to allow the use of small external components while supporting high background load currents. It features both internal current and thermal protection, making it ideal for space-constrained and board-level systems where reliable performance and protection are essential.

Features

• Input voltage range of 3.2V to 24V
• Output current of up to 5A
• Programmable switching frequency to 2.5MHz
• Internal current and thermal protection
• Small external components support

Typical Application

Working Principle

LT8303IS5 is a current-mode switching regulator that operates in the pulse-width modulation (PWM) mode. It regulates the output voltage by varying the on-time of the switching transistor according to the feedback voltage. An internal oscillator generates the fixed-frequency clock signal. In addition, an internal compensator is used to establish the proper on-time of the switching transistor.

The sensing resistor is used to sense the current of the output and to feed back the voltage to the error amplifier in order to keep the output at the desired level. The error amplifier compares the feedback voltage with the internal reference voltage to make sure the output voltage stays at the desired level. An adjust pin is provided for output voltage setting. The internal loop compensation is pre-programmed to the optimum settings for all the conditions stated in the datasheet, making it easy to configure the LT8303IS5.

Conclusion

The LT8303IS5#TRPBF synchronous step-down regulator can deliver up to 5A of continuous output current while operating from a wide input voltage range of 3.2V to 24V. With its programmable switching frequency of up to 2.5MHz, small external components support, and internal current and thermal protection, it is an ideal choice for board-level systems where reliable performance and protection are essential.