200mA Single Resistor Low Dropout Linear Regulator

The LT3082 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.

Internal protection circuitry includes reverse-battery and reverse-current protection, current limiting and thermal limiting. The LT3082 is offered in the thermally enhanced 8-lead TSOT-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

* 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