DESCRIPTION
The LTC®1983-3 and LTC1983-5 are inverting charge pump DC/DC converters that produce negative regulated outputs. The parts require only three tiny external capacitors and can provide up to 100mA of output current. The devices can operate in open loop mode (creating a –VIN supply) or regulated output mode depending on the input supply voltage and the output current.

FEATURES
■ Fixed Output Voltages: –3V, –5V or Low Noise VIN to –VIN Inverted Output
■ ±4% Output Voltage Accuracy
■ Low Quiesient Current: 25µA
■ 100mA Output Current Capability
■ 3V to 5.5V Operating Voltage Range (LTC1983-3)
■ 2.3V to 5.5V Operating Voltage Range (LTC1983-5)
■ Internal 900kHz Oscillator
■ “Zero Current” Shutdown
■ Short-Circuit and Over-Temperature Protected
■ Low Profile (1mm) ThinSOTTM Package

APPLICATIONS
■ –3V Generation in Single-Supply Systems
■ Portable Equipment
■ LCD Bias Supplies
■ GaAs FET Bias Supplies