LT337A_15 Datasheet, PDF (1/12 Pages) Linear Technology – Negative Adjustable Regulator

FEATURES
n _{Guaranteed 1% Initial Voltage Tolerance}
n _{Guaranteed 0.01%/V Line Regulation}
n _{Guaranteed 0.5% Load Regulation}
n _{Guaranteed 0.02%/W Thermal Regulation}
n _{100% Burn-in in Thermal Limit}
APPLICATIONS
n _{Adjustable Power Supplies}
n _{System Power Supplies}
n _{Precision Voltage/Current Regulators}
n _{On-Card Regulators}
LT137A/LM137
LT337A/LM337
Negative Adjustable
Regulator
DESCRIPTION
The LT^®137A/LT337A negative adjustable regulators will
deliver up to 1.5A output current over an output voltage
range of –1.2V to –37V. Linear Technology has made
significant improvements in these regulators compared to
previous devices, such as better line and load regulation,
and a maximum output voltage error of 1%.
Every effort has been made to make these devices easy
to use and difficult to damage. Internal current and power
limiting coupled with true thermal limiting prevents device
damage due to overloads or shorts, even if the regulator
is not fastened to a heat sink.
Maximum reliability is attained with Linear Technology’s
advanced processing techniques combined with a 100%
burn-in in the thermal limit mode. This assures that all
device protection circuits are working and eliminates field
failures experienced with other regulators that receive only
standard electrical testing.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
Negative Regulator
+
–V_IN
C2
5μF
SOLID
TANTALUM
V_IN
ADJ
LT137A V_OUT
 ^{*R2 = R1}
|V_OUT|
1.25V
–
1
137A TA01
R2*
+
R1
121Ω
C3
1μF
SOLID
TANTALUM
 ^–VOUT ^{= 1.25V}
1
+
R2
R1
Output Voltage Error
12
11
10
9
8
7
6
5
4
3
2
1
0
1
1% RESISTORS
2% RESISTORS
LM337
LT337A
2 4 6 8 10 20 40
100
OUTPUT VOLTAGE (V)
137A TA01b
137afb
1