LT1761

` Tiny 5-Lead SOT-23 Package
` Low Noise: 20V_RMS (10Hz to 100kHz)
` Low Quiescent Current: 20A
` Wide Input Voltage Range: 1.8V to 20V
` Output Current: 100A
` Very Low Shutdown Current: < 0.1A
` Low Dropout Voltage: 300mV at 100A
` 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 1F Output Capacitor
` Stable with Aluminum, Tantalum or Ceramic Capacitors
` Reverse Battery Protected
` No Reverse Current
` No Protection Diodes Needed
` Overcurrent and Overtemperature Protected

IN Pin Voltage ....................................................... ±20V
OUT Pin Voltage ................................................... ±20V
Input to Output Differential Voltage .................... ±20V
ADJ Pin Voltage ...................................................... ±7V
BYP Pin Voltage.................................................... ±0.6V
SHDN Pin Voltage ................................................. ±20V
Output Short-Circut Duration.......................... Indefinite
Operating Junction Temperature Range
(Note 2) ............................................ 40°C to 125°C
Storage Temperature Range ............ 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................ 300°C

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

The LT1761 regulators are stable with output capacitors as low as 1F. Small ceramic capacitors can be used without the series resistance required by other regulators.

Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The device is available in fixed output voltages of 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V and 5V, and as an adjustable device with a 1.22V reference voltage. The LT1761 regulators are available in the 5-lead SOT-23 package.