The LTC3577/LTC3577-1 integrates multiple portable device power management functions into one IC, reducing complexity, cost and board area in handheld devices. It includes five voltage regulators, a battery charger and PowerPath™ manager, an LED driver, and pushbutton control. By combining these functions, the LTC3577/LTC3577-1 not only reduces the number of required ICs but also solves the problems of functional interoperability, improving end-product performance.
This document is a design note (DN470) by Linear Technology Corporation detailing the features and applications of the LTC3577 and LTC3577-1 integrated circuits. These devices integrate multiple power management functions, including voltage regulators, a battery charger, an LED driver, and pushbutton control, into a single IC to reduce complexity and board area in handheld devices.
Holding the pushbutton down for five seconds produces a hard reset that shuts down the three bucks, the two LDOs and the LED driver.
The LTC3577/LTC3577-1 battery charger can provide a charge current up to 1.5A via Vgys or wall adapter when available.
Each of the first two buck regulators can provide up to 500mA.