MAX1703ESE+ (MAXIM INTEGRATED PRODUCTS)

The MAX1703ESE+ is a 1-cell to 3-cell, high power (1.5A), low noise, step-up DC-DC converter in 16 pin NSOIC package. It uses a synchronous-rectified pulse width modulation (PWM) boost topology to generate a 2.5V to 5.5V output from battery inputs such as one to three NiCd/NiMH cells or one Li-Ion cell. The device includes a 2A, 75Mohm, N-channel MOSFET switch and a 140Mohm, P-channel synchronous rectifier. With its internal synchronous rectifier IC delivers up to 5% better efficiency than similar non synchronous converters. It also features a pulse frequency modulation (PFM) low-power mode to improve efficiency at light loads and a 1µA shutdown mode. It has an uncommitted comparator that generates a power-good or low-battery-warning output and linear gain block that can be used to build a linear regulator. The high efficiency, low noise, converter used in battery-powered wireless applications & digital cordless phones, two-way pagers, personal communicators & palmtop computers