DESCRIPTION

The LT®3082 is a 200mA low dropout linear regulator that can be paralleled to increase output current or spread heat in surface mounted boards. Architected as a precision current source and voltage follower, this regulator benefits many applications requiring high current, adjustability to zero and no heat sink. The LT3082 withstands reverse input voltages and reverse output-to-input voltages without reverse-current flow.

A key feature of the LT3082 is the capability to supply a wide output voltage range. A precision “0” TC 10μA reference current source drives a single resistor to program the output voltage to any level between zero and 38.5V. The LT3082 is stable with only 2.2μF of capacitance on the output; the IC uses small ceramic capacitors that do not require additional ESR as is common with other regulators.

FEATURES

■ Outputs May Be Paralleled for Higher Output Current or Heat Spreading

■ Maximum Output Current: 200mA

■ Wide Input Voltage Range: 1.2V to 40V

■ Output Adjustable to 0V

■ Stable with Minimum 2.2μF Ceramic Capacitors

■ Single Resistor Sets Output Voltage

■ Initial Set Pin Current Accuracy: 1%

■ Low Output Noise: 33μVRMS (10Hz to 100kHz)

■ Reverse-Battery Protection

■ Reverse-Current Protection

■ <1mV Load Regulation Typical

■ <0.001%/V Line Regulation Typical

■ Current Limit and Thermal Shutdown Protection

■ Available in 8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm × 3mm DFN Packages

APPLICATIONS

■ All-Surface Mount Power Supply

■ Post Regulator for Switching Supplies

■ Low Parts Count Variable Voltage Supply

■ Low Output Voltage Supply

■ Battery Powered Regulator