Datasheet LT3080 (Analog Devices)

LT3080 Adjustable1.1A Single Resistor Low Dropout Regulator
FeaTures DescripTion
n
Outputs May be Paralleled for Higher Current and
The LT®3080 is a 1.1A low dropout linear regulator that can
Heat Spreading
be paralleled to increase output current or spread heat in n
Output Current: 1.1A
surface mounted boards. Architected as a precision cur- n
Single Resistor Programs Output Voltage
rent source and voltage follower allows this new regulator n
1% Initial Accuracy of SET Pin Current
to be used in many applications requiring high current, n
Output Adjustable to 0V
adjustability to zero, and no heat sink. Also the device n
Low Output Noise: 40µVRMS (10Hz to 100kHz)
brings out the collector of the pass transistor to allow low n
Wide Input Voltage Range: 1.2V to 36V
dropout operation —down to 350 millivolts— when used n
Low Dropout Voltage: 350mV (Except SOT-223
with multiple supplies.
Package)
A key feature of the LT3080 is the capability to supply a n <1mV Load Regulation wide output voltage range. By using a reference current n <0.001%/V Line Regulation through a single resistor, the output voltage is programmed n Minimum Load Current: 0.5mA to any level between zero and 36V. The LT3080 is stable n Stable with 2.2µF Minimum Ceramic Output Capacitor with 2.2µF of capacitance on the output, and the IC uses n Current Limit with Foldback and Overtemperature small ceramic capacitors that do not require additional Protected ESR as is common with other regulators. n Available in 8-Lead MSOP, 3mm × 3mm DFN, 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223 Internal protection circuitry includes current limiting and thermal limiting. The LT3080 regulator is offered in the
applicaTions
8-lead MSOP (with an exposed pad for better thermal n characteristics), a 3mm × 3mm DFN, 5-lead DD-Pak, High Current All Surface Mount Supply n TO-220 and a simple-to-use 3-lead SOT-223 version. High Efficiency Linear Regulator n Post Regulator for Switching Supplies L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the n Low Parts Count Variable Voltage Supply property of their respective owners. n Low Output Voltage Power Supplies
Typical applicaTion Set Pin Current Distribution Variable Output Voltage 1.1A Supply
N = 13792 V IN LT3080 IN 1.2V TO 36V VCONTROL + 1µF – OUT VOUT SET 2.2µF RSET VOUT = RSET • 10µA 9.80 9.90 10.00 10.10 10.20 3080 TA01a SET PIN CURRENT DISTRIBUTION (µA) 3080 G02 3080fc 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts