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LM337
Three-Terminal Adjustable
Output Negative Voltage
Regulator
The LM337 is an adjustable 3鈥搕erminal negative voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
鈥?.2 V to 鈥?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鈥搊ut 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.
鈥?/div>
Output Current in Excess of 1.5 A
THREE鈥揟ERMINAL
ADJUSTABLE NEGATIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Output Adjustable between 鈥?.2 V and 鈥?37 V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting Constant with Temperature
Output Transistor Safe鈥揂rea Compensation
Floating Operation for High Voltage Applications
Eliminates Stocking many Fixed Voltages
Available in Surface Mount D2PAK and Standard 3鈥揕ead Transistor
Package
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Standard Application
IPROG
+
R2
R1
120
IAdj
+
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
Pin 1. Adjust
2. Vin
3. Vout
Cin*
1.0
碌F
CO**
1.0
碌F
1
2
3
Vin
鈥揤in
LM337
Vout
鈥揤out
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
ORDERING INFORMATION
* Cin is required if regulator is located more than 4 inches from power supply filter.
*
A 1.0
碌F
solid tantalum or 10
碌F
aluminum electrolytic is recommended.
** CO is necessary for stability. A 1.0
碌F
solid tantalum or 10
碌F
aluminum electrolytic
**
is recommeded.
V out
Device
LM337BD2T
LM337BT
LM337D2T
LM337T
TJ = 鈥?40擄 to +125擄C
TJ = 0擄 to +125擄C
Operating
Temperature Range
Package
Surface Mount
Insertion Mount
Surface Mount
Insertion Mount
Rev 1
+
鈥?.25 V 1
)
R2
R
1
漏
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
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