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Linear Technology Electronic Components Datasheet

LT1036 Datasheet

Logic Controlled Regulator

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OBSOLETE:
FOR INFORMATION PURPOSES ONLY
Contact Linear Technology for Potential Replacement
FEATURES
Two Regulated Outputs:
12V at 3A
5V at 75mA
2% Output Voltage Tolerance
60dB Ripple Rejection
0.7% Load Regulation
TTL and CMOS Compatible Logic Control
100% Thermal Burn-In on All Devices
U
APPLICATIO S
Power Supply Sequencing
Remote On/Off Power Control
Selective System Power During Emergency
Power Operation
Memory Power Supply with Back-Up
LT1036
Logic Controlled Regulator
DESCRIPTIO
The LT®1036 features two positive regulators in the same
package. The 12V main regulator offers excellent
performance while supplying load currents up to 3A, and
the 5V auxiliary regulator provides similar performance
while supplying lighter loads of 75mA. The main regulator
has the additional feature of being under the shutdown
control of a logic signal. When the enable pin is taken to a
low logic level, the main regulator shuts down and its
output voltage goes to near 0V. During this command, the
auxiliary output is unaffected by the main regulator’s
condition and continues to provide a 5V output.
The main output has current and power limiting combined
with thermal shutdown to make it virtually blowout proof.
The auxiliary output is not affected by the thermal
shut down mechanism or the state of the main output,
allowing it to be used as a back-up in case of overloads or
shorts on the main supply.
The logic input of the LT1036 (enable pin) has a 1.6V
threshold and can be driven from a high source
impedance. This allows it to be driven by most logic
families, including TTL and CMOS.
For a dual 5V version of the LT1036, please see the LT1035
data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
VIN
ENABLE
LOGIC
Functional Diagram
5
IN
2
EN
LT1036
GND
3
1
OUT
4
AUX
12V
OV
5V
LT1036M/1036C • FD01
Guaranteed Load Current,
12V Output
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
14 16 18 20 22 24 26 28
INPUT VOLTAGE (V)
30
LT1036M/1036C • FD02
1036fb
1


Linear Technology Electronic Components Datasheet

LT1036 Datasheet

Logic Controlled Regulator

No Preview Available !

LT1036
ABSOLUTE AXI U RATI GS (Note 1)
Power Dissipation
Continuous (Note 6) ........................................... 24W
Fault Conditions .............................. Internally Limited
Input Voltage (VIN) .................................................. 30V
Enable Voltage (VEN) ............................................... 30V
Operating Junction Temperature
LT1036M .......................................... – 55°C to 150°C
LT1036C ................................................ 0°C to 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PRECO DITIO I G 100% Burn-In in Thermal Limit
UW U
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
VIN
5
1
42
VO
CASE
IS GND
ORDER PART
NUMBER
LT1036MK
LT1036CK
AUX
K PACKAGE
4-LEAD TO-3 METAL CAN
TJMAX = 125°C, θJC = 3°C/W
VEN
FRONT VIEW
5
4
3
2
1
VIN
AUX
GND
VEN
VO
ORDER PART
NUMBER
LT1036CT
T PACKAGE
5-LEAD PLASTIC TO-220
TJMAX = 150°C, θJC = 2.5°C/W
TJMAX = 125°C, θJC = 2.5°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range. Main regulator (Note 2) VIN = 15V unless otherwise noted.
SYMBOL
VO
VO
IO
VO
VIN
IO
ISC
VIN
PARAMETER
Output Voltage
High
Low
Load Regulation
(Note 7)
Line
Regulation
Ripple Rejection
Thermal Regulation
Available Load Current
(Note 7)
Short Circuit
Current
Input Voltage to
Maintain Regulation
(Dropout Voltage)
2
CONDITIONS
TJ = 25°C
15V VIN 30V,
IOUT IMAX (Note 7)
7V VIN 30V
VIN = 16V
0 IO 3A (Note 3)
15V VIN 30V
(Note 3)
50Hz f 500Hz (Note 9)
PD = 20W (Note 5)
15V VIN 20V
VIN = 25V
VIN = 15V
VIN = 25V
(Note 6)
IO = 1A
IO = 3A
MIN TYP MAX
11.76 12 12.24
11.52
12.48
0.1 0.3
10 80
14
50 60
0.003 0.012
3
2
4
2.7
2.3 4
12
13.8 14.5
14.4 15
UNITS
V
V
V
mV
mV/V
dB
%/W
A
A
A
A
V
V
1036fb


Part Number LT1036
Description Logic Controlled Regulator
Maker Linear
Total Page 12 Pages
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