LT1579CS-3#PBF

Battery Management Overview

The LT1579CS-3#PBF is a dual-input, single-output low dropout linear regulator manufactured by Analog Devices Inc. It provides a fixed 3V output with a maximum current of 300mA. The device operates within an input voltage range of 2.7V to 20V and features a typical dropout voltage of 400mV. It incorporates internal circuitry for smooth, automatic switching between two independent power sources on a priority basis. Key electrical specifications include a quiescent current of 50µA, input bias current of 6nA, and a typical power supply rejection ratio of 70dB. The component is housed in a 16-pin SOIC package and supports operation temperatures from 0°C to +125°C.

Battery Management Feature Summary

• Dual-input architecture enabling uninterruptible output voltage from two independent sources
• Integrated automatic priority-based switching circuitry for seamless source transitions
• Low quiescent current consumption suitable for battery-powered applications
• High power supply rejection ratio for effective noise filtering

Battery Management Applications

• Smart battery backup systems requiring uninterrupted power delivery
• Dual-source power management circuits for critical loads
• Battery protection designs utilizing shutdown logic to prevent reverse current

Battery Management Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected package variant matches the intended PCB footprint requirements. Cross-reference the datasheet revision history to validate performance parameters under expected operating conditions. Confirm compliance with relevant environmental standards prior to integration into final assemblies.

Battery Management Selection Notes

Select this component when designing systems requiring seamless transition between primary and backup power sources without output interruption. Consider the 300mA output capability and 400mV dropout voltage relative to load requirements. Evaluate the 2.7V minimum input constraint against the lowest expected source voltage. Assess thermal dissipation capabilities based on the voltage differential between input and output at maximum load currents.

Battery Management Part Context

This part belongs to the LT1579 series of dual-input regulators designed for high-reliability power management. Unlike standard single-input LDOs, it integrates complex switching logic to manage multiple power rails. The CS-3 suffix indicates a specific fixed output voltage configuration within the broader family of adjustable and fixed variants available in the series.

Battery Management Replacement Considerations

LT1579CS-3#TRPBF