DESCRIPTIOn
The LT ®1761 series are micropower, low noise, low dropout regulators. With an external 0.01µF bypass capacitor, output noise drops to 20µVRMS over a 10Hz to 100kHz bandwidth. Designed for use in battery-powered systems, the low 20µA quiescent current makes them an ideal choice. In shutdown, quiescent current drops to less than 0.1µA. The devices are capable of operating over an input voltage from 1.8V to 20V, and can supply 100mA of output current with a dropout voltage of 300mV. Quiescent current is well controlled, not rising in dropout as it does with many other regulators.

FEATURES
■ Tiny 5-Lead SOT-23 Package
■ Low Noise: 20µVRMS (10Hz to 100kHz)
■ Low Quiescent Current: 20µA
■ Wide Input Voltage Range: 1.8V to 20V
■ Output Current: 100mA
■ Very Low Shutdown Current: < 0.1µA
■ Low Dropout Voltage: 300mV at 100mA
■ Fixed Output Voltages: 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V, 5V
■ Adjustable Output from 1.22V to 20V
■ Stable with 1µF Output Capacitor
■ Stable with Aluminum, Tantalum or Ceramic Capacitors
■ Reverse Battery Protected
■ No Reverse Current
■ No Protection Diodes Needed
■ Overcurrent and Overtemperature Protected

APPLICATIONS
■ Cellular Phones
■ Pagers
■ Battery-Powered Systems
■ Frequency Synthesizers
■ Wireless Modems