LM337AT Datasheet, PDF (1/10 Pages) ON Semiconductor – 1.5 A, Adjustable Output, Negative Voltage Regulator

LM337
1.5 A, 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.
Features
• 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
• Pb−Free Packages are Available
I_PROG
C_in*
+
1.0 mF
I_Adj
R₂
R₁
120
C_O** ⁺
1.0 mF
V_in
V_out
-V_in
LM337
-V_out
* C_in is required if regulator is located more than 4 inches from power supply filter.
* A 1.0 mF solid tantalum or 10 mF aluminum electrolytic is recommended.
** C_O is necessary for stability. A 1.0 mF solid tantalum or 10 mF aluminum electrolytic
** is recommended.
ǒ Ǔ Vout  +  –1.25 V 
1
)
R2
R1
Figure 1. Standard Application
http://onsemi.com
THREE−TERMINAL
ADJUSTABLE NEGATIVE
VOLTAGE REGULATOR
MARKING
DIAGRAMS
D²PAK
D2T SUFFIX
CASE 936
LM
337yyyy
AWLYWWG
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Pin 1. Adjust
2. V_in
3. V_out
TO−220AB
T SUFFIX
CASE 221AB
Heatsink surface
connected to Pin 2.
LM
337xx
AWLYWWG
1
xx
yyyy
A
WL
Y
WW
G
= BT, T
= BD2T, D2T
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
1
April, 2012 − Rev. 9
Publication Order Number:
LM337/D