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LT1185IQ#PBF

Description
Low Dropout Regulator Adj 3A Postive or Negative Low Dropout Regulator
CategoryPower/power management    The power supply circuit   
File Size176KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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LT1185IQ#PBF Overview

Low Dropout Regulator Adj 3A Postive or Negative Low Dropout Regulator

LT1185IQ#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionLEAD FREE, PLASTIC, D2PAK-5
Contacts5
Manufacturer packaging code05-08-1461
Reach Compliance Codenot_compliant
Is SamacsysN
Maximum drop-back voltage 11 V
Maximum Differential Input-Output Voltage20 V
Minimum Differential Input-Output Voltage1 V
JESD-30 codeR-PSSO-G5
JESD-609 codee3
length10.223 mm
Humidity sensitivity level1
Number of functions1
Number of terminals5
Working temperatureTJ-Max125 °C
Working temperature TJ-Min-40 °C
Maximum output current 13 A
Maximum output voltage 125 V
Minimum output voltage 12.5 V
Package body materialPLASTIC/EPOXY
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Regulator typeADJUSTABLE NEGATIVE SINGLE OUTPUT LDO REGULATOR
Maximum seat height4.775 mm
surface mountYES
technologyBIPOLAR
Terminal surfaceMatte Tin (Sn) - with Nickel (Ni) barrier
Terminal formGULL WING
Terminal pitch1.7 mm
Terminal locationSINGLE
Maximum time at peak reflow temperature30
width8.89 mm
Base Number Matches1
LT1185
Low Dropout Regulator
FEATURES
Low Resistance Pass Transistor: 0.25
Dropout Voltage: 0.75V at 3A
±
1% Reference Voltage
Accurate Programmable Current Limit
Shutdown Capability
Internal Reference Available
Full Remote Sense
Low Quiescent Current: 2.5mA
Good High Frequency Ripple Rejection
Available in 5-Lead TO-220 and DD Packages
The LT1185 uses a saturation-limited NPN transistor as
the pass element. This device gives the linear dropout
characteristics of a FET pass element with significantly
less die area. High efficiency is maintained by using special
anti-saturation circuitry that adjusts base drive to track
load current. The “on resistance” is typically 0.25Ω.
Accurate current limit is programmed with a single 1/8W
external resistor, with a range of zero to three amperes. A
second, fixed internal limit circuit prevents destructive
currents if the programming current is accidentally over-
ranged. Shutdown of the regulator output is guaranteed
when the program current is less than 1µA, allowing
external logic control of output voltage.
The LT1185 has all the protection features of previous
LTC regulators, including power limiting and thermal
shutdown.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
DESCRIPTIO
The LT
®
1185 is a 3A low dropout regulator with adjustable
current limit and remote sense capability. It can be used as
a positive output regulator with floating input or as a
standard negative regulator with grounded input. The
output voltage range is 2.5V to 25V, with
±1%
accuracy on
the internal reference voltage.
TYPICAL APPLICATIO
5V, 3A Regulator with 3.5A Current Limit
+
+
2µF
TANT
R
LIM
*
4.3k
REF
GND
FB
2.37k
+
V
IN
– V
OUT
(V)
V
IN
6V TO 16V
V
IN
LT1185
V
OUT
*CURRENT LIMIT = 15k/R
LIM
= 3.5A
U
U
+
2.67k
2µF
TANT
V
OUT
5V AT 3A
LT1185 • TA01
Dropout Voltage
1.6
1.4
1.2
1.0
T
J
= 25°C
0.8
0.6
0.4
T
J
= –55°C
0.2
0
0
1
2
LOAD CURRENT (A)
LT1185 • TA02
T
J
= 125°C
3
4
1185ff
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