LT1375IS8

Overview

The LT1375IS8 is a monolithic buck mode switching regulator manufactured by Analog Devices Inc. It integrates a 1.5A switch, oscillator, control circuitry, and logic into an 8-SOIC package. The device operates with an input voltage range of 5V to 25V and supports a fixed output voltage of 5V or adjustable outputs from 2.42V to 21.5V. It delivers up to 1.2A to 1.5A output current at a fixed switching frequency of 500kHz. The component functions within a temperature range of -40°C to +125°C and includes shutdown capability.

Feature Summary

• Integrates a high-current 1.5A power switch on the die alongside all necessary oscillator and control logic for a complete solution.
• Operates at a high 500kHz switching frequency, enabling significant reduction in the physical size of external passive components.
• Supports both fixed and adjustable output configurations via external resistor networks.
• Includes a dedicated shutdown pin for power management and system-level energy conservation.

Applications

• Battery-powered systems requiring efficient step-down conversion
• Post-regulation stages for bus distribution networks
• Portable equipment utilizing single-cell lithium-ion batteries
• Industrial control modules requiring isolated or non-isolated DC-DC conversion

Procurement Notes

Verify the specific suffix against official datasheets to confirm output voltage configuration. The IS8 designation indicates a SOIC-8 package. Confirm RoHS compliance status through manufacturer documentation. Ensure the ordering part number matches the required fixed or adjustable output variant. Cross-reference the manufacturer's latest revision history for any marking or material changes.

Selection Notes

Select this component when a compact footprint is required due to the 500kHz operation. Choose between fixed or adjustable variants based on the target load voltage requirements. Verify that the input voltage source remains within the 5V to 25V operational window. Ensure thermal design accommodates the junction temperature limits under maximum load conditions.

Part Context

This device belongs to the LT1375 series of high-frequency step-down switching regulators. It is designed as a cost-effective alternative to linear regulators in applications where efficiency and thermal dissipation are critical constraints. The series provides a robust solution for converting higher input voltages to lower stable output levels for sensitive electronic loads.

Replacement Considerations

LT1375IS8#PBF is a verified equivalent part number offering identical electrical specifications and pinout compatibility. Verify package dimensions and lead finish details before substitution to ensure mechanical fit.