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MAX1555EZK+T

MAX1555EZK+T

Analog Devices / Maxim Integrated
Battery Management SOT23, Dual-Input, USB/AC Adapter, 1-Cel
4,020 in stock
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Overview

The MAX1555EZK+T is a compact, dual-input Li+ battery charger designed for single-cell lithium-ion batteries. It automatically selects between USB and AC adapter power sources without requiring external MOSFETs or sense resistors, making it ideal for space-constrained portable devices.

Why Choose This Part

It features on-chip thermal limiting which simplifies board design by eliminating the need for complex thermal management. The device includes a POK (power OK) output to signal the presence of a valid input source to a microcontroller.

Applications

Portable Media Players
Efficiently charges internal Li-ion cells from either a dedicated wall adapter or a standard USB port.
Digital Still Cameras
Small SOT23 footprint allows for integration into compact imaging devices with limited PCB area.
Handheld GPS Terminals
Provides seamless power path switching and battery charging for mobile navigation equipment.

Getting Started

Integrate the MAX1555 onto a PCB with a 1uF ceramic capacitor at the BAT and IN pins for stability. Use the MAX1555EVKIT evaluation board to test the automatic switchover logic between the USB and DC input pins in a controlled environment.

Also Consider

MCP73831 MCHPMicrochip Technology - A popular, highly integrated linear charge management controller in a similar SOT-23-5 package.
LTC4054 Analog Devices - A standalone linear charger with a charge status output and internal MOSFET in a ThinSOT package.

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