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LM137K/883 Datasheet

  • LM137K/883

  • 3-Terminal Adjustable Negative Regulators

  • 12頁

  • NSC

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LM137/LM337 3-Terminal Adjustable Negative Regulators
November 2004
LM137/LM337
3-Terminal Adjustable Negative Regulators
General Description
The LM137/LM337 are adjustable 3-terminal negative volt-
age regulators capable of supplying in excess of 鈭?.5A over
an output voltage range of 鈭?.2V to 鈭?7V. These regulators
are exceptionally easy to apply, requiring only 2 external
resistors to set the output voltage and 1 output capacitor for
frequency compensation. The circuit design has been opti-
mized for excellent regulation and low thermal transients.
Further, the LM137 series features internal current limiting,
thermal shutdown and safe-area compensation, making
them virtually blowout-proof against overloads.
The LM137/LM337 serve a wide variety of applications in-
cluding local on-card regulation, programmable-output volt-
age regulation or precision current regulation. The LM137/
LM337 are ideal complements to the LM117/LM317
adjustable positive regulators.
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Excellent thermal regulation, 0.002%/W
77 dB ripple rejection
Excellent rejection of thermal transients
50 ppm/藲C temperature coefficient
Temperature-independent current limit
Internal thermal overload protection
P
+
Product Enhancement tested
Standard 3-lead transistor package
Output is short circuit protected
LM137 Series Packages and Power Capability
Rated
Device
LM137/337
Package
TO-3 (K)
TO-39 (H)
LM337
LM337
TO-220 (T)
SOT-223
(MP)
Power
Dissipation
20W
2W
15W
2W
Design
Load
Current
1.5A
0.5A
1.5A
1A
Features
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Output voltage adjustable from 鈭?.2V to 鈭?7V
1.5A output current guaranteed, 鈭?5藲C to +150藲C
Line regulation typically 0.01%/V
Load regulation typically 0.3%
Typical Applications
Adjustable Negative Voltage Regulator
Comparison between SOT-223 and
D-Pak (TO-252) Packages
00906731
Scale 1:1
00906701
Full output current not available at high input-output voltages
鈥?/div>
C1 = 1 碌F solid tantalum or 10 碌F aluminum electrolytic required for
stability
*C2 = 1 碌F solid tantalum is required only if regulator is more than 4" from
power-supply filter capacitor
Output capacitors in the range of 1 碌F to 1000 碌F of aluminum or tantalum
electrolytic are commonly used to provide improved output impedance and
rejection of transients
漏 2004 National Semiconductor Corporation
DS009067
www.national.com

LM137K/883 產(chǎn)品屬性

  • 0現(xiàn)貨2,843Factory

  • 在售

  • -

  • 托盤

  • 在售

  • 負(fù)

  • 可調(diào)式

  • 1

  • 40V

  • -1.2V

  • -37V

  • -

  • 1.5A

  • -

  • -

  • 77dB ~ 60dB（120Hz）

  • -

  • 過流，超溫

  • -55°C ~ 150°C

  • 通孔

  • TO-204AA，TO-3

  • TO-3

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