LT3088
800mA Single Resistor
Rugged Linear Regulator
FEATURES DESCRIPTION
n
Extended Safe Operating Area
The LT 3088 is an 800mA low dropout linear regulator
n
Maximum Output Current: 800mA
designed for rugged industrial applications. A key feature
n
Stable with or without Input/Output Capacitors
of the IC is the extended safe operating area (SOA). The
n
Wide Input Voltage Range: 1.2V to 36V
LT3088 can be paralleled for higher output current or heat
n
Single Resistor Sets Output Voltage
spreading. The device withstands reverse input and reverse
n
Output Adjustable to 0V
output-to-input voltages without reverse current flow.
n
50A SET Pin Current: 1% Initial Accuracy
The LT3088s precision 50A reference current source
n
Output Voltage Noise: 27V
RMS
allows a single resistor to program output voltage to
n
Parallel Multiple Devices for Higher Current, Heat
any level between zero and 34.5V. The current reference
Spreading and Lower Noise
architecture makes load regulation independent of output
n
Pin Compatible Upgrade to LT1117
voltage. The LT3088 is stable with or without input and
n
Reverse-Battery and Reverse-Current Protection
output capacitors.
n
<1mV Typical Load Regulation Independent of V
OUT
n
Internal protection circuitry includes reverse-battery and
<0.001%/V Typical Line Regulation
n
reverse-current protection, current limiting and thermal
3-Lead SOT-223, 3-Lead DD-Pak, 8-Lead 3mm
limiting. The LT3088 is offered in the 3-lead SOT-223,
3mm DFN Packages
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
APPLICATIONS
Technology Corporation. All other trademarks are the property of their respective owners.
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
TYPICAL APPLICATION
SET Pin Current
Wide Safe Operating Area Supply
51.0
I = 2mA
LOAD
50.8
V
IN
50.6
LT3088 IN
50.4
50A 50.2
50.0
+
49.8
I
OUT
49.6
OUT
1.5V
49.4
SET 800mA
750*
10F*
49.2
30.1k
3088 TA01a
49.0
*OPTIONAL
75 50 25 0 25 50 75 100 125 150 175
TEMPERATURE (C)
3088 G01
3088fb
1
For more information www.linear.com/LT3088
SET PIN CURRENT (A)LT3088
ABSOLUTE MAXIMUM RATINGS (Note 1) All voltages Relative to V
OUT
IN Pin to OUT Pin Differential Voltage .....................40V Storage Temperature Range .................. 65C to 150C
SET Pin Current (Note 6) .....................................25mA Lead Temperature (Soldering, 10 sec)
SET Pin Voltage (Relative to OUT, Note 6) .............. 10V M, ST Packages Only ........................................300C
Output Short-Circuit Duration .......................... Indefinite
Operating Junction Temperature Range (Note 2)
E-, I-Grades ....................................... 40C to 125C
H-Grade ............................................. 40C to 150C
MP-Grade .......................................... 55C to 150C
PIN CONFIGURATION
TOP VIEW
FRONT VIEW
FRONT VIEW
OUT 1 8 IN
3 IN
3 IN
OUT 2 7 IN
9
TAB IS
TAB IS
OUT 2 OUT 2 OUT
OUT NC OUT
3 6
OUT
SET 4 5 NC
1 SET
1 SET
ST PACKAGE
M PACKAGE
DD PACKAGE
3-LEAD PLASTIC SOT-223
3-LEAD PLASTIC DD-PAK
8-LEAD (3mm 3mm) PLASTIC DFN
T = 150C, = 25C/W, = 15C/W
T = 150C, = 28C/W, = 5.3C/W JMAX JA JC T = 150C, = 14C/W, = 3C/W
JMAX JA JC JMAX JA JC
EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3088EDD#PBF LT3088EDD#TRPBF LGSZ 40C to 125C
8-Lead (3mm 3mm) Plastic DFN
LT3088IDD#PBF LT3088IDD#TRPBF LGSZ 8-Lead (3mm 3mm) Plastic DFN 40C to 125C
LT3088HDD#PBF LT3088HDD#TRPBF LGSZ 8-Lead (3mm 3mm) Plastic DFN 40C to 150C
LT3088EST#PBF LT3088EST#TRPBF 3088 3-Lead Plastic SOT-223 40C to 125C
LT3088IST#PBF LT3088IST#TRPBF 3088 3-Lead Plastic SOT-223 40C to 125C
LT3088HST#PBF LT3088HST#TRPBF 3088 3-Lead Plastic SOT-223 40C to 150C
LT3088MPST#PBF LT3088MPST#TRPBF 3088 3-Lead Plastic SOT-223 55C to 150C
LT3088EM#PBF LT3088EM#TRPBF LT3088M 3-Lead Plastic DD-Pak 40C to 125C
LT3088IM#PBF LT3088IM#TRPBF LT3088M 3-Lead Plastic DD-Pak 40C to 125C
LT3088HM#PBF LT3088HM#TRPBF LT3088M 3-Lead Plastic DD-Pak 40C to 150C
LT3088MPM#PBF LT3088MPM#TRPBF LT3088M 3-Lead Plastic DD-Pak 55C to 150C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: