Datasheet LT3080-1 (Analog Devices)

LT3080-1 Parallelable 1.1A Adjustable Single Resistor Low Dropout Regulator
FeaTures DescripTion
n
Internal Ballast Resistor Permits Direct
The LT®3080-1 is a 1.1A low dropout linear regulator that
Connection to Power Plane for Higher Current
incorporates an internal ballast resistor to allow direct
and Heat Spreading
paralleling of devices without the need for PC board trace n
Output Current: 1.1A
resistors. The internal ballast resistor allows multiple de- n
Single Resistor Programs Output Voltage
vices to be paralleled directly on a surface mount board n
1% Initial Accuracy of SET Pin Current
for higher output current and power dissipation while n
Output Adjustable to 0V
keeping board layout simple and easy. The device brings n
Low Output Noise: 40µVRMS (10Hz to 100kHz)
out the collector of the pass transistor to allow low dropout n
Wide Input Voltage Range: 1.2V to 36V
operation—down to 350mV—when used with multiple n
Low Dropout Voltage: 350mV
input supplies. n <0.001%/ V Line Regulation The LT3080-1 is capable of supplying a wide output volt- n Minimum Load Current: 0.5mA age range. A reference current through a single resistor n Stable with 2.2µF Minimum Ceramic Output Capacitor programs the output voltage to any level between zero n Current Limit with Foldback and Overtemperature and 36V. The LT3080-1 is stable with 2.2µF of ceramic Protected capacitance on the output, not requiring additional ESR n Available in 8-Lead MSOP and 3mm × 3mm DFN as is common with other regulators.
applicaTions
Internal protection includes current limiting and thermal limiting. The LT3080-1 regulator is offered in the 8-lead n High Current All Surface Mount Supply MSOP (with an Exposed Pad for better thermal charac- n High Efficiency Linear Regulator teristics) and 3mm × 3mm DFN packages. 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 Paralleling Regulators Offset Voltage Distribution
IN LT3080-1 V N = 13250 CONTROL + – 25mΩ OUT* SET IN V LT3080-1 IN 4.8V TO 28V VCONTROL + 1µF – 25mΩ OUT* VOUT 3.3V –2 –1 0 1 2 2.2A SET VOS DISTRIBUTION (mV) 10µF 30801 TA01b *OUTPUTS CAN BE 165k DIRECTLY MOUNTED TO POWER PLANE 30801 TA01 30801fc For more information www.linear.com/LT3080-1 1 Document Outline Features Applications Typical Application Description 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