MAX684 Datasheet

• Ultra-Small: 1µF Capacitors per 100mA of Output Current
• No Inductors Required
• 1.1mm Height in µMAX Package (MAX684)
• 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

• 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

The 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 MAX684 deliver 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 MAX684 are offered in a space-saving 8-pin µMAX package that is only 1.1mm high.