LM337T/NOPB National Semiconductor, LM337T/NOPB Datasheet
LM337T/NOPB
Manufacturer Part Number
LM337T/NOPB
Description
IC REGULATOR NEG ADJ TO220-3
Manufacturer
National Semiconductor
Type
Voltage Regulatorr
Specifications of LM337T/NOPB
Regulator Topology
Negative Adjustable
Voltage - Output
-1.2 ~ -37 V
Voltage - Input
-4.2 ~ -50 V
Number Of Regulators
1
Current - Output
1.5A
Current - Limit (min)
1.5A
Operating Temperature
0°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-3 (Straight Leads)
Current, Output
1.5 A
Package Type
TO-220
Power Dissipation
15 W
Regulation, Line
0.01 %/V
Regulation, Load
0.3 %
Regulator Type
Negative Voltage Out
Resistance, Thermal, Junction To Case
4 °C/W
Temperature, Operating, Range
0 to +125 °C
Voltage, Input
40 V
Voltage, Noise
0.003 %
Voltage, Output
-1.2 to -37 V
Voltage, Supply, Rejection Ratio
77 dB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Dropout (typical)
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Other names
*LM337T
*LM337T/NOPB
LM337TNS
*LM337T/NOPB
LM337TNS
Available stocks
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LM137/LM337
3-Terminal Adjustable Negative Regulators
General Description
The LM137/LM337 are adjustable 3-terminal negative volt-
age regulators capable of supplying in excess of −1.5A over
an output voltage range of −1.2V to −37V. These regulators
are exceptionally easy to apply, requiring only 2 external
resistors to set the output voltage and 1 output capacitor for
frequency compensation. The circuit design has been opti-
mized for excellent regulation and low thermal transients.
Further, the LM137 series features internal current limiting,
thermal shutdown and safe-area compensation, making
them virtually blowout-proof against overloads.
The LM137/LM337 serve a wide variety of applications in-
cluding local on-card regulation, programmable-output volt-
age regulation or precision current regulation. The LM137/
LM337 are ideal complements to the LM117/LM317
adjustable positive regulators.
Features
n Output voltage adjustable from −1.2V to −37V
n 1.5A output current guaranteed, −55˚C to +150˚C
n Line regulation typically 0.01%/V
n Load regulation typically 0.3%
Typical Applications
Full output current not available at high input-output voltages
stability
*C2 = 1 µF solid tantalum is required only if regulator is more than 4" from
power-supply filter capacitor
Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum
electrolytic are commonly used to provide improved output impedance and
rejection of transients
†
C1 = 1 µF solid tantalum or 10 µF aluminum electrolytic required for
Adjustable Negative Voltage Regulator
00906701
n Excellent thermal regulation, 0.002%/W
n 77 dB ripple rejection
n Excellent rejection of thermal transients
n 50 ppm/˚C temperature coefficient
n Temperature-independent current limit
n Internal thermal overload protection
n P
n Standard 3-lead transistor package
n Output is short circuit protected
Comparison between SOT-223 and
D-Pak (TO-252) Packages
LM137/337
LM337
LM337
+
Device
LM137 Series Packages and Power Capability
Product Enhancement tested
TO-3 (K)
TO-39 (H)
TO-220 (T)
SOT-223
(MP)
Package
Scale 1:1
Dissipation
Power
Rated
20W
15W
2W
2W
00906731
Current
Design
Load
1.5A
0.5A
1.5A
1A
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LM337T/NOPB Summary of contents
Page 1
LM137/LM337 3-Terminal Adjustable Negative Regulators General Description The LM137/LM337 are adjustable 3-terminal negative volt- age regulators capable of supplying in excess of −1.5A over an output voltage range of −1.2V to −37V. These regulators are exceptionally easy to apply, requiring ...
Page 2
... Absolute Maximum Ratings 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Operating Junction Temperature Range LM137 Electrical Characteristics Parameter = 25˚C, 3V ≤ |V Line Regulation T j (Note 25˚ ≤ I ...
Page 3
... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...