lt3083idf Linear Technology Corporation, lt3083idf Datasheet

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lt3083idf

Manufacturer Part Number
lt3083idf
Description
Lt3083 - Adjustable 3a Single Resistor Low Dropout Regulator
Manufacturer
Linear Technology Corporation
Datasheet

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APPLICATIONS
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TYPICAL APPLICATION
FEATURES
V
CONTROL
Outputs May be Paralleled for Higher Current and
Heat Spreading
Output Current: 3A
Single Resistor Programs Output Voltage
50μA Set Pin Current: 1% Initial Accuracy
Output Adjustable to 0V
Low Output Noise: 40μV
Wide Input Voltage Range: 1.2V to 23V
(DD-Pak and TO-220 Packages)
Low Dropout Voltage: 310mV
<1mV Load Regulation
<0.001%/V Line Regulation
Minimum Load Current: 1mA
Stable with Minimum 10μF Ceramic Capacitor
Current Limit with Foldback and Overtemperature
Protection
Available in 16-Lead TSSOP , 12-Lead 4mm × 4mm
DFN, 5-Lead TO-220 and 5-Lead Surface Mount
DD-PAK Packages
High Current All Surface Mount Supply
High Effi ciency Linear Regulator
Post Regulator for Switching Supplies
Low Parts Count Variable Voltage Supply
Low Output Voltage Power Supplies
3.3V
1.5V
V
IN
1.5V to 0.9V at 3A Supply (Using 3.3V V
4.7μF
10μF
IN
V
CONTROL
LT3083
SET
R
18.2k
1%
RMS
SET
3083 TA01a
OUT
(10Hz to 100kHz)
0.1μF
10μF
CONTROL
*
R
909Ω
MIN
)
*OPTIONAL FOR
V
I
MAX
MINIMUM 1mA LOAD
REQUIREMENT
OUT
= 3A
= 0.9V
DESCRIPTION
The LT
be paralleled to increase output current or spread heat on
surface mounted boards. Architected as a precision current
source and voltage follower, this new regulator fi nds use
in many applications requiring high current, adjustability
to zero, and no heat sink. The device also brings out the
collector of the pass transistor to allow low dropout opera-
tion—down to 310mV—when used with multiple supplies.
A key feature of the LT3083 is the capability to supply a
wide output voltage range. By using a reference current
through a single resistor, the output voltage is programmed
to any level between zero and 23V (DD-PAK and TO-220
packages). The LT3083 is stable with 10μF of capacitance
on the output, and the IC is stable with small ceramic ca-
pacitors that do not require additional ESR as is common
with other regulators.
Internal protection circuitry includes current limiting and
thermal limiting. The LT3083 is offered in the 16-lead
TSSOP (with an exposed pad for better thermal character-
istics), 12-lead 4mm × 4mm DFN (also with an exposed
pad), 5-lead TO-220, and 5-lead surface mount DD-PAK
packages.
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.
®
3083 is a 3A low dropout linear regulator that can
49
N = 1052
Set Pin Current Distribution
SET PIN CURRENT DISTRIBUTION (μA)
Dropout Regulator
Single Resistor Low
49.5
Adjustable 3A
50
50.5
3083 TA01b
51
LT3083
1
3083f

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