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MAX682：3.3V Input to Regulated 5V Output Charge Pumps

Only 1µF Capacitor per 100mA Output

The MAX682/MAX683/MAX684 charge-pump regulators generate 5V from a 2.7V to 5.5V input. They are specifically designed to serve as high-efficiency auxiliary supplies in applications that demand a compact design. The MAX682, MAX683, and MAX684 deliver 250mA, 100mA, and 50mA output current, respectively. These complete 5V regulators require only one resistor and three external capacitors—no inductors are needed. High switching frequencies (externally adjustable up to 2MHz) and a unique regulation scheme allow the use of capacitors as small as 1µF per 100mA of output current. The MAX683/MAX684 are offered in a space-saving 8-pin µMAX package that is only 1.1mm high, while the MAX682 is available in an 8-pin SO.

Key Features Ultra-Small: 1µF Capacitors per 100mA of Output Current No Inductors Required 1.1mm Height in µMAX Package (MAX683/MAX684) Up to 250mA Output Current (MAX682) Regulated ±4% Output Voltage 50kHz to 2MHz Adjustable Switching Frequency 2.7V to 5.5V Input Voltage 100µA Quiescent Current in Pulse-Skipping Mode 0.1µA Shutdown Current

MAX682, MAX683, MAX684: Typical Operating Circuit Applications/Uses 3.3V to 5V Local Conversion Applications 3V to 5V GSM SIMM Cards Backup Battery Boost Converters Battery-Powered Applications Flash Memory Supplies Miniature Equipment PCMCIA Cards

DataSheet

Parametrics

Quality and Environmental Data

• MAX682.pdf

Ordering Information