General Description

The MAX1642/MAX1643 are high-efficiency, low-voltage, step-up DC-DC converters intended for devices powered by a single alkaline cell. They feature low quiescent supply currents and are supplied in the ultra-small µMAX package, which is only 1.1mm high. The guaranteed start-up voltage is 0.88V. Each device consists of an

Features

♦ Built-In Synchronous Rectifier

♦ 0.88V Guaranteed Start-Up

♦ Ultra-Small µMAX Package: 1.1mm High

♦ 83 Efficiency

♦ 4µA Quiescent Supply Current into BATT Pin

♦ 2µA Logic-Controlled Shutdown (MAX1642)

♦ Two Undervoltage Detectors (MAX1643)

♦ 2V to 5.2V Output Range

♦ 20mA Output Current at 1.2V Input

♦ Reverse Battery Protection

Applications

Pagers

Remote Controls

Pointing Devices

Personal Medical Monitors

Single-Cell Battery-Powered Devices