LT1949-1EMS8#PBF

Overview

The LT1949-1EMS8#PBF is a high-efficiency, synchronous step-up DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 1.7V to 12V and provides an adjustable output voltage from 1.7V to 28V. The device supports a continuous switch current of 1A and utilizes a fixed switching frequency of 600kHz. Packaged in an 8-lead MSOP, it integrates a power MOSFET for compact designs.

Feature Summary

• Integrates a synchronous rectifier architecture to maximize conversion efficiency across various load conditions.
• Features a fixed 600kHz switching frequency to minimize external passive component size.
• Includes internal soft-start circuitry to limit inrush current during startup sequences.

Applications

• Portable battery-powered equipment requiring efficient voltage boosting
• Industrial control systems with single-supply requirements
• Automotive electronics operating within specified voltage ranges

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the EMS8 package variant matches your PCB footprint requirements. Ensure the ordering code corresponds to the tube packaging format rather than tape and reel options. Cross-reference the manufacturer part number against official Analog Devices documentation to avoid counterfeit components.

Selection Notes

Select this component for applications requiring a wide input voltage range up to 12V. Consider the 1A current limit when sizing external inductors and capacitors. Evaluate the thermal performance within the MSOP package for your specific ambient temperature constraints. Compare against non-synchronous alternatives if peak efficiency is not the primary design driver.

Part Context

This part belongs to the LT1949 family of high-efficiency boost converters. It shares architectural similarities with other members like the LT1949-3 but differs in pinout and specific electrical characteristics. The series is designed for space-constrained portable applications where small solution size and high efficiency are critical.

Replacement Considerations

LT1949EMS8#PBF is functionally equivalent regarding core specifications. Verify pin compatibility before substitution. Other variants in the LT1949 family may require schematic adjustments due to different pin configurations or electrical limits.