LM337 Datasheet, PDF (1/8 Pages) ON Semiconductor – THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATOR

Order this document by LM337/D
Three-Terminal Adjustable
Output Negative Voltage
Regulator
The LM337 is an adjustable 3–terminal negative voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
–1.2 V to – 37 V. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it
employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blow–out proof.
The LM337 serves a wide variety of applications including local, on card
regulation. This device can also be used to make a programmable output
regulator, or by connecting a fixed resistor between the adjustment and
output, the LM337 can be used as a precision current regulator.
• Output Current in Excess of 1.5 A
• Output Adjustable between –1.2 V and – 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Eliminates Stocking many Fixed Voltages
• Available in Surface Mount D2PAK and Standard 3–Lead Transistor
Package
LM337
THREE–TERMINAL
ADJUSTABLE NEGATIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Standard Application
IPROG
Cin*
+
1.0 µF
R2
R1
120
IAdj
CO** ⁺
1.0 µF
Vin
Vout
–Vin
LM337
–Vout
* Cin is required if regulator is located more than 4 inches from power supply filter.
* A 1.0 µF solid tantalum or 10 µF aluminum electrolytic is recommended.
+ ǒ ) Ǔ ^{** CO is necessary for stability. A 1.0 µF solid tantalum or 10 µF aluminum electrolytic}
** is recommeded.
Vout
–1.25 V 1
R2
R1
MOTOROLA ANALOG IC DEVICE DATA
Pin 1. Adjust
2. Vin
3. Vout
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
12
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
ORDERING INFORMATION
Operating
Device Temperature Range Package
LM337BD2T
Surface Mount
LM337BT
TJ = – 40° to +125°C _{Insertion Mount}
LM337D2T
LM337T
Surface Mount
TJ = 0° to +125°C
Insertion Mount
© Motorola, Inc. 1996
Rev 1
1