LT338A_15 Datasheet, PDF (1/14 Pages) Linear Technology – 5A Positive Adjustable Voltage Regulator

OBSOLETE:
FOR INFORMATION PURPOSES ONLY
Contact Linear Technology for Potential Replacement
Features
nn _{Guaranteed 1% Initial Tolerance}
nn _{Guaranteed 0.3% Load Regulation}
nn _{Guaranteed 5A Output Current}
nn _{100% Thermal Limit Burn-In}
nn _{12A Transient Output Current}
Applications
nn _{High Power Linear Regulator}
nn _{Battery Chargers}
nn _{Power Driver}
nn _{Constant-Current Regulator}
Typical Application
Parallel Regulators for Higher Current*
LT338A
0.01Ω∗∗
V_IN
V_IN
V_OUT
5V
8A
ADJ
LT350A
V_IN
V_OUT
ADJ
0.016Ω**
121Ω
1%
365Ω
1%
138/338 TA01
*THIS CIRCUIT WILL NOT WORK WITH LM VERSION DEVICES
**CURRENT SHARING RESISTORS DEGRADE REGULATION TO 1%
LT138A/LT338A
LM138/LM338
5A Positive Adjustable
Voltage Regulator
Description
The LT^®138A series of adjustable regulators provide 5A
output current over an output voltage range of 1.2V to
32V. The internal voltage reference is trimmed to less
than 1%, enabling a very tight output voltage. In addition
to excellent line and load regulation, with full overload
protection, the LT138A incorporates new current limit-
ing circuitry allowing large transient load currents to be
handled for short periods. Transient load currents of up
to 12A can be supplied without limiting, eliminating the
need for a large output capacitor.
The LT138A is an improved version of the popular LM138
with improved circuit design and advanced process tech-
niques to provide superior performance and reliability.
The graph below shows the significant improvement in
output voltage tolerance achieved by using the LT138A
or LT338A.
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.
Output Voltage Error
12
11
10
9
2% RESISTORS
8
LM338
7
6
1% RESISTORS _LM338
5
LT338A
4
2% RESISTORS
3
LT338A
2
1% RESISTORS
1
0
1
10
100
OUTPUT VOLTAGE (V)
138A/338A TA02
For more information www.linear.com/LT138A
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