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LM137H Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No. de pieza LM137H
Descripción Electrónicos  3-Terminal Adjustable Negative Regulators
Download  12 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM137H Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Electrical Characteristics (Note 1) (Continued)
Note 4: Refer to RETS137H drawing for LM137H or RETS137K drawing for LM137K military specifications.
Schematic Diagram
00906702
Thermal Regulation
When power is dissipated in an IC, a temperature gradient
occurs across the IC chip affecting the individual IC circuit
components. With an IC regulator, this gradient can be es-
pecially severe since power dissipation is large. Thermal
regulation is the effect of these temperature gradients on
output voltage (in percentage output change) per Watt of
power change in a specified time. Thermal regulation error is
independent of electrical regulation or temperature coeffi-
cient, and occurs within 5 ms to 50 ms after a change in
power dissipation. Thermal regulation depends on IC layout
as well as electrical design. The thermal regulation of a
voltage regulator is defined as the percentage change of
V
OUT, per Watt, within the first 10 ms after a step of power is
applied. The LM137’s specification is 0.02%/W, max.
00906703
LM137, VOUT = −10V
VIN −VOUT = −40V
IIL =0A → 0.25A → 0A
Vertical sensitivity, 5 mV/div
FIGURE 1.
www.national.com
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