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-low12Ω 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 orexternal component size. Its small external components and micropower shutdown mode make this device ideal for both battery-powered and board-level voltageconversion applications.Oscillator control circuitry and four power MOSFET switches are included on-chip. Applications include generating a negative supply from a +5V or +3.3V logic supply to power analog circuitry. All versions come in a 6-pin SOT23 package and deliver 60mA.For applications with lower current requirements, the MAX1719/MAX1720/MAX1721 are pin-compatible SOT23 charge pumps that supply up to 25mA.ApplicationsBattery-Operated EquipmentGaAsFET Bias SuppliesHandy-Terminals, PDAsNegative Supply from +5V or +3.3V Logic SuppliesSmall LCD Panels