General Description

The MAX1697 ultra-small, monolithic, CMOS charge-pump voltage inverter accepts an input voltage ranging from +1.25V to +5.5V. This device features an ultra-low 12Ω output resistance, permitting loads of up to 60mA with maximum efficiency. The MAX1697 is available with operating frequencies of 12kHz, 35kHz, 125kHz, or 250kHz, allowing optimization of supply current or external component size. Its small external components and micropower shutdown mode make this device ideal for both battery-powered and board-level voltage conversion applications.

Features

♦ 60mA Output Current

♦ Low 12Ω Output Resistance

♦ 150µA Supply Current (MAX1697R)

♦ Requires Only Two 1µF Capacitors (MAX1697U)

♦ Start-Up Current Limited

♦ +1.25V to +5.5V Input Voltage Range

♦ Slew-Rate Limited to Reduce EMI

Applications

Negative Supply from +5V or +3.3V Logic Supplies

Small LCD Panels

GaAsFET Bias Supplies

Handy-Terminals, PDAs

Battery-Operated Equipment