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STMicroelectronics Electronic Components Datasheet

LM237H Datasheet

NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE

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LM237H pdf
LM137/LM237
LM337
THREE-TERMINAL ADJUSTABLE
NEGATIVE VOLTAGE REGULATORS
. OUTPUT VOLTAGE ADJUSTABLE DOWN TO
Vref
. 1.5A GUARANTEED OUTPUT CURRENT
. 0.3%/V TYPICAL LOAD REGULATION
. 0.01%/V TYPICAL LINE REGULATION
. CURRENT LIMIT CONSTANT WITH TEM-
PERATURE
. RIPPLE REJECTION : 77dB
. STANDARD 3-LEAD TRANSISTOR PACK-
AGES
. EXCELLENT THERMAL REGULATION:
0.002%/V
. 50ppm/°C TEMPERATURE COEFFICIENT
TO-3
DESCRIPTION
The LM137 series are adjustable 3-terminal nega-
tive voltage regulators capable of supplying in ex-
cess - 1.5A over a -1.2 to - 37V output voltage range.
They are exceptionally easy to use and require only
two external resistors to set the output voltage. Fur-
ther, both line and load regulation are better than
standard fixed regulators. Also, LM137 regulators
are supplied in standard transistor packages which
are easily mounted and handled. In addition to
higher performance than fixed regulators, the
LM137 series offer full overload protection available
only in integrated circuits. Included on the chip are
current limit, thermal overload protection and safe
area protection. All overload protection circuitry re-
mains fully functional even if the adjustment terminal
is disconnected.
PIN CONNECTIONS
TO-3
(bottom view)
TO-39
(bottom view)
TO-220
TO-39
TO-220
(front view)
March 1993
1 - Output
2 - Adj
Case is input
1 - Adj
2 - Output
3 - input
1 - Adj
2 - Output
3 - Input
Heatsink surface connected to input
1/14


STMicroelectronics Electronic Components Datasheet

LM237H Datasheet

NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE

No Preview Available !

LM237H pdf
LM137-LM237-LM337
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
VI - VO Input Output Voltage Differential
IO Output Current
Toper
Tstg
Ptot
TO-220/TO-3
TO-39
LM137
LM237
LM337
Value
40
1.5
0.5
-55 to 150
-25 to 150
0 to 125
-65 to 150
Internally Limited
Unit
V
A
oC
oC
W
THERMAL CHARACTERISTICS
Symbol
Parameter
Rthj-case Junction-case Thermal Resistance
Rthj-amb Junction-ambient Thermal Resistance
TO-3
TO-220
TO-39
TO-3
TO-220
TO-39
Typ.
ORDER CODES
PART NUMBER
LM137
LM237
LM337
TEMPERATURE
RANGE
-55 to 150 oC
-25 to 150 oC
0 to 125 oC
TO-3
LM137K
LM237K
LM337K
PACKAGE
TO-220
LM237SP
LM337SP
Max.
4
3
15
35
70
160
Unit
oC/W
oC/W
TO-39
LM137H
LM237H
LM337H
2/14


Part Number LM237H
Description NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE
Maker STMicroelectronics
Total Page 14 Pages
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