LT3088_15 Datasheet, PDF (1/26 Pages) Linear Technology – 800mA Single Resistor Rugged Linear Regulator

LT3088
800mA Single Resistor
Rugged Linear Regulator
Features
n _{Extended Safe Operating Area}
n _{Maximum Output Current: 800mA}
n _{Stable with or without Input/Output Capacitors}
n _{Wide Input Voltage Range: 1.2V to 36V}
n _{Single Resistor Sets Output Voltage}
n _{Output Adjustable to 0V}
n _{50µA SET Pin Current: 1% Initial Accuracy}
n _{Output Voltage Noise: 27µVRMS}
n _{Parallel Multiple Devices for Higher Current, Heat}
Spreading and Lower Noise
nn _{Pin Compatible Upgrade to LT1117}
n _{Reverse-Battery and Reverse-Current Protection}
n _{<1mV Typical Load Regulation Independent of VOUT}
n _{<0.001%/V Typical Line Regulation}
n _{3-Lead SOT-223, 3-Lead DD-Pak, 8-Lead 3mm ×}
3mm DFN Packages
Applications
n _{All Surface Mount Power Supply}
n _{Rugged Industrial Power Supply}
n _{Post Regulator for Switching Supplies}
n _{Low Output Voltage Supply}
n _{Intrinsic Safety Applications}
Description
The LT^®3088 is an 800mA low dropout linear regulator
designed for rugged industrial applications. A key feature
of the IC is the extended safe operating area (SOA). The
LT3088 can be paralleled for higher output current or heat
spreading. The device withstands reverse input and reverse
output-to-input voltages without reverse current flow.
The LT3088’s precision 50µA reference current source
allows a single resistor to program output voltage to
any level between zero and 34.5V. The current reference
architecture makes load regulation independent of output
voltage. The LT3088 is stable with or without input and
output capacitors.
Internal protection circuitry includes reverse-battery and
reverse-current protection, current limiting and thermal
limiting. The LT3088 is offered in the 3-lead SOT-223,
3-lead DD-Pak, and an 8-lead 3mm × 3mm DFN package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Wide Safe Operating Area Supply
V_IN
LT3088
IN
50µA
+
–
SET
30.1k
OUT
I_OUT
1.5V
800mA
10µF* ^750Ω*
*OPTIONAL
3088 TA01a
SET Pin Current
51.0
I_LOAD = 2mA
50.8
50.6
50.4
50.2
50.0
49.8
49.6
49.4
49.2
49.0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3088 G01
For more information www.linear.com/LT3088
3088f
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