LT1946EMS8E#PBF

Overview

The LT1946EMS8E#PBF is a synchronous boost and SEPIC DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 2.45 V to 16 V and delivers a switch current of 1.5 A. The device features a fixed switching frequency of 2.7 MHz and supports adjustable output voltages up to 35 V. Packaged in an 8-lead MSOP with an exposed pad, it functions within a temperature range of 0°C to 70°C.

Feature Summary

• Integrates a high-efficiency synchronous rectifier architecture for optimized power conversion.
• Supports both boost and SEPIC topologies to accommodate varying input-to-output voltage requirements.
• Includes internal soft-start functionality to limit inrush current during startup sequences.

Applications

• Battery-powered portable equipment requiring step-up or inverted voltage regulation
• Industrial control systems utilizing single-cell lithium-ion or alkaline battery sources
• Automotive electronics operating from variable vehicle electrical systems

Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required thermal management solutions given the surface-mount packaging constraints. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and supply chain integrity before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require simultaneous boost and SEPIC capabilities within a compact footprint. The fixed 2.7 MHz switching frequency allows for the use of smaller external passive components compared to lower-frequency alternatives. Evaluate the 1.5 A switch current rating against peak load demands to ensure adequate headroom for transient response scenarios without exceeding thermal limits.

Part Context

This device belongs to the LT1946 family of high-performance synchronous converters designed for space-constrained applications. It shares architectural similarities with other members of the series but offers specific electrical characteristics tailored for efficient power management in portable and industrial environments. The MSOP-EP package provides a balance between thermal dissipation and board area efficiency.

Replacement Considerations

LT1946EMS8E#TRPBF serves as the tape-and-reel variant of this component, offering identical electrical performance with different packaging for automated assembly processes. Verify pinout compatibility and thermal characteristics when substituting between tube and reel formats to ensure seamless integration into existing designs.