MAX858 Datasheet (Maxim) - Step-Up DC-DC Converters

MAX858, Step-Up DC-DC Converters

The MAX856 *MAX859 are high-efficiency, CMOS, stepup, DC-DC switching regulators for small, low input volt age or battery-powered systems.

The MAX856/MAX858 accept a positive input voltage between 0.8V and V OUT and convert it to a higher, pin-selectable output voltage of 3.3V or 5V.

The MAX8

MAX858 Features

* o o o o o o o o o o 0.8V to 6.0V Input Supply Voltage 0.8V Typ Start-Up Supply Voltage 85% Efficiency at 100mA 25µA Quiescent Current 1µA Shutdown Mode 125mA and 500mA Switch-Current Limits Permit Use of Low-Cost Inductors Up to 500kHz Switching Frequency ±1.5% Reference Tolerance Over Temperature L