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LM137_08 Datasheet

  • LM137_08

  • Three-terminal adjustable negative voltage regulators

  • 1006.69KB

  • 18頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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LM137
LM337
Three-terminal adjustable negative voltage regulators
Features
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Output voltage adjustable down to V
REF
1.5 A guaranteed output current
0.3 %/V typical load regulation
0.01 %/V typical line regulation
Current limit constant with temperature
Ripple rejection: 77 dB
Standard 3-lead transistor packages
Excellent thermal regulation: 0.002 %/V
50 ppm/擄C temperature coefficient
TO-220
TO-3
Description
The LM137 series are adjustable 3-terminal
negative voltage regulators capable of supplying
in excess -1.5 A over a -1.2 to -37 V output
voltage range. They are exceptionally easy to use
and require only two external resistors to set the
output voltage. Further, 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 remains fully
functional even if the adjustment terminal is
disconnected.
Table 1.
Device summary
Part numbers
LM137
LM337
Order codes
LM137K
LM337K
Temperature range
-55 擄C to 150 擄C
0 擄C to 125 擄C
July 2008
Rev 3
1/18
www.st.com
18

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