LTC1983-3

` Fixed Output Voltages: 3V, 5V or Low Noise V<sub>IN</sub> to V<sub>IN</sub> Inverted Output
` ±4% Output Voltage Accuracy
` Low Quiesient Current: 25mA
` 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) ThinSOT^TM Package

`3V Generation in Single-Supply Systems
`Portable Equipment
` LCD Bias Supplies
` GaAs FET Bias Supplies

V_IN to GND ..................................................... 0.3V to 6V
SHDN Voltage ................................................ 0.3V to 6V
V_OUT to GND (LTC1983-3) ..................... 0.2V to V_OUT Max
V_OUT to GND (LTC1983-5) ..................... 0.2V to V_OUT Max
I_OUT Max ................................................................ 125mA
Output Short-Circuit Duration ............................. Indefinite
Operating Temperature Range (Note 2) ..40°C to 85°C
Storage Temperature Range ................ 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................... 300°C

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 capacitorsand can provide up to 100mA of output current. The devices can operate in open loop mode (creating a V_IN supply) or regulated output mode depending on the input supply voltage and the output current.

The LTC1983-3/LTC1983-5 have many useful features for portable applications including very low quiescent current (25mA typical) and a zero current shutdown mode programmed through the SHDN pin.

The LTC1983-3/LTC1983-5 are over-temperature and short-circuit protected. The parts are available in a 6-pin low profile (1mm) ThinSOT package.