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Linear Technology Electronic Components Datasheet

LT1038 Datasheet

10Amp Positive Adjustable Voltage Regulator

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OBSOLETE PRODUCT
DATA SHEET FOR REFERENCE ONLY
Consult www.linear.com for possible alternate source.
FEATURES
s Guaranteed 0.8% Initial Tolerance
s Guaranteed 0.4% Load Regulation
s Guaranteed 10A Output Current
s 100% Thermal Limit Burn-In
s 24A Transient Output Current
s Standard Adjustable Pinout
s Operates to 35V
U
APPLICATIO S
s System Power Supplies
s High Power Linear Regulator
s Battery Chargers
s Power Driver
s Constant Current Regulator
LT1038
10A Positive
Adjustable Voltage
Regulator
DESCRIPTIO
The LT®1038 is a three terminal regulator which is capable
of providing in excess of 10A output current over 1.2V to
32V range. The device is packaged in a standard T0-3
power package and is plug-in compatible with industry
standard adjustable regulators, such as the LM117 and
LM138. Also, the LT1038 is a functional replacement for
the LM396.
In addition to excellent load and line regulations, the
LT1038 is fully protected by current limiting, safe area
protection and thermal shutdown. New current limiting
circuitry allows transient load currents up to 24A to be
supplied for 500µs without causing the regulator to cur-
rent limit and drop out of regulation during the transient.
On-chip trimming of initial reference voltage to ±0.8%
combined with 0.4% load regulation minimize errors in all
high current applications. Further, the LT1038 is manufac-
tured with standard bipolar processing and has Linear
Technology’s high reliability.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIONS
5V, 10A Regulator
VIN 8V
+
1µF
LT1038
VIN VOUT
ADJ
121
1% +
365
1%
5V
AT 10A
10µF
1038 TA01
Load Regulation
0.2
VIN = 15V
VOUT = 10V
0.1 PRELOAD = 100mA
0
IOUT = 6A
– 0.1 IOUT = 10A
– 0.2
– 0.3
– 0.4
– 75 – 50 – 25 0 25 50 75 100 125 150
TEMPERATURE (°C)
1038 TA02
1


Linear Technology Electronic Components Datasheet

LT1038 Datasheet

10Amp Positive Adjustable Voltage Regulator

No Preview Available !

LT1038
ABSOLUTE AXI U RATI GS
(Note 1)
Power Dissipation ............................... Internally Limited
Input to Output Voltage Differential ......................... 35V
Operating Junction Temperature Range
LT1038M Control Circuitry ................ –55°C to 150°C
LT1038M Power Transistor ............... –55°C to 200°C
LT1038C Control Circuitry ..................... 0°C to 125°C
LT1038C Power Transistor .................... 0°C to 175°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
BOTTOM VIEW
VIN
2
ORDER PART
NUMBER
LT1038MK
1
CASE
ADJ IS OUTPUT
LT1038CK
K PACKAGE
2-LEAD TO-3 METAL CAN
TJMAX = 3°C, θJA = 35°C/W
OBSOLETE PACKAGE
PRECO DITIO I G 100% Thermal Limit Burn-in
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
SYMBOL
VREF
VOUT
VIN
VOUT
IOUT
IADJ
IADJ
ISC
VOUT
Temp
VOUT
Time
en
θJC
PARAMETER
Reference Voltage
Line Regulation
Load Regulation
Thermal Regulation
Ripple Rejection
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Current Limit
Temperature Stability
Long Term Stability
RMS Output Noise
(% of VOUT)
Thermal Resistance
Junction to Case
CONDITIONS
IOUT = 20mA, Tj = 25°C
3V (VIN – VOUT) 35V
20mA IOUT 10A, P 75W
3V (VIN – VOUT) 35V,
IOUT = 20mA (Note 3)
20mA IOUT 10A (Note 3)
3V (VIN – VOUT) 35V
3V (VIN – VOUT) 35V
20ms Pulse
VOUT = 10V, f = 120Hz
CADJ = 0µF
CADJ = 10µF
20mA IOUT 10A
3V (VIN – VOUT) 35V
(VIN – VOUT) = 35V
(VIN – VOUT) 20V
(VIN – VOUT) 10V
DC
Transient (0.5ms)
(VIN – VOUT) = 30V, Tj = 25°C
TA = 125°C, 1000 Hours
10Hz f 10kHz
Power Transistor
Control Circuity
LT1038M
MIN TYP MAX
1.24 1.25 1.26
q 1.22 1.25 1.285
LT1038C
MIN TYP MAX
1.23 1.25 1.275
1.22 1.25 1.285
UNITS
V
V
0.005 0.01
q 0.02 0.03
0.005
0.02
0.02
0.03
%/V
%/V
0.1 0.4
q 0.3 0.8
0.002 0.005
0.1
0.3
0.002
0.6
1.0
0.01
%
%
%/W
q
q 60
q
60
75 60
50 100
60
75
50 100
dB
dB
µA
q 0.2 3
q 7 20
q 10
0.2 3
7 20
10
µA
mA
mA
q 10
14
14
22
10 14
12 22
12
12
q 12
1
A
A
A
%
0.3 1
0.3 1
%
0.001
0.001
%
q1
0.5
1 °C/W
0.5 °C/W
2


Part Number LT1038
Description 10Amp Positive Adjustable Voltage Regulator
Maker Linear Technology
Total Page 8 Pages
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