LT1579CS-5#PBF

Battery Management Overview

The LT1579CS-5#PBF is a dual-input, single-output low dropout regulator manufactured by Analog Devices Inc. It provides a fixed 5 V output with a maximum current of 300 mA. The device accepts an input voltage range from 2.7 V to 20 V and features a typical dropout voltage of 400 mV. It operates within a temperature range of 0°C to +125°C and is housed in a 16-lead SOIC package. Key electrical specifications include a quiescent current of 50 µA, line regulation of 1.5 mV, load regulation of 5 mV, and a typical power supply rejection ratio of 70 dB.

Battery Management Feature Summary

• Provides uninterruptible output voltage by automatically switching between two independent input sources on a priority basis
• Integrates all circuitry required for smooth and automatic transition between inputs without external logic
• Designed for battery backup applications to maintain system operation during primary power loss

Battery Management Applications

• Dual battery backup power supplies
• Uninterruptible power systems requiring seamless source switching
• Battery-powered equipment needing extended runtime via redundant inputs

Battery Management Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the SOIC-16 package dimensions match your PCB footprint requirements. Ensure the 5 V fixed output variant aligns with your system voltage needs, as other voltage options exist within the LT1579 series. Check manufacturer documentation for any recent production changes or obsolescence notices.

Battery Management Selection Notes

Select this component when continuous power delivery from redundant sources is critical. The low dropout characteristic allows operation even when input voltage approaches the output level. Consider the 300 mA current limit for load requirements. The wide input range supports various battery chemistries. Verify thermal performance under maximum load conditions given the SOIC-16 package constraints.

Battery Management Part Context

This part belongs to the LT1579 family of smart battery backup regulators. These devices are designed to manage power transitions between primary and secondary sources. The CS-5 designation specifies the commercial temperature range and the 5 V fixed output version. The #PBF suffix denotes environmental compliance.

Battery Management Replacement Considerations

LT1579CS8-5#PBF is a documented alternative in the same family, featuring an 8-SOIC package instead of 16-SOIC. Verify pin compatibility and thermal characteristics before substitution.