MAX1644 - Maxim

MAX1644 Advanced Chemistry-Independent / Level 2 Battery Charger

h Features S a t a D . w KIT ATION EVALU LE B A IL A AV MAX1644 ♦ ±1% Output Accuracy ♦ 95% Efficiency ♦ Internal PMOS and NMOS Switches 70mΩ On-Resistance at VIN = +4.5V 100mΩ On-Resistance at VIN = +3V ♦ Output Voltage +3.3V or +2.5V Pin-Selectable +1.1V to VIN Adjustable ♦ +3V to +5.5V Input Voltage Range ♦ < 1µA Shutdown Supply Current The MAX1644 u.

Features

internal synchronous rectification for high efficiency and reduced component count. It requires no external Schottky diode. The internal 0.10Ω PMOS power switch and 0.10Ω NMOS synchronous-rectifier switch easily deliver continuous load currents up to 2A. The MAX1644 produces a preset +3.3V or +2.5V output voltage or an adjustable output from +1.1V to VIN. It achieves efficiencies as high as 95%. w m o c . 2A, Low-Voltage, Step-Down Regulator with U 4 t Synchronous Rectification and Internal Switches e eGeneral Description h Features S a t a D . w KIT ATION EVALU LE B A IL A AV MAX1644 ♦ ±1.