LM337 데이터 시트보기 (PDF) - ON Semiconductor
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LM337 Datasheet PDF : 12 Pages
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ON Semiconductort
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.
• 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
Standard Application
IPROG
Cin*
+
1.0 µF
IAdj
R2
R1
120
CO** +
1.0 µF
Vin
Vout
-Vin
LM337
-Vout
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
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.
*āCin is required if regulator is located more than 4 inches from power supply filter.
*āA 1.0 µF solid tantalum or 10 µF aluminum electrolytic is recommended.
**āCO is necessary for stability. A 1.0 µF solid tantalum or 10 µF aluminum electrolytic
**āis recommended.
ǒ Ǔ VoutĂ +Ă ć1.25ĂVĂ
1
)
R2
R1
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
© Semiconductor Components Industries, LLC, 2002
1
January, 2002 – Rev. 3
Publication Order Number:
LM337/D
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