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LM337HVH
3-Terminal Adjustable Negative Regulator (High Voltage)
LM137HV/LM337HV
3-Terminal Adjustable Negative Regulators
(High Voltage)
General DescriptionThe LM137HV/LM337HVare adjustable 3-terminal negative
voltage regulators capableof supplyingin excessof −1.5A
overan output voltage rangeof −1.2Vto −47V. These regu-
lators areexceptionally easyto apply, requiringonly2 exter-
nal resistorstosetthe output voltageand1 output capacitor
forfrequency compensation. Thecircuitdesignhas beenop-
timizedfor excellent regulation andlow thermal transients.
Further,the LM137HV series features internal current limit-
ing, thermal shutdownand safe-area compensation, making
them virtually blowout-proof against overloads.
The LM137HV/LM337HV servea wide varietyof applica-
tions including local on-card regulation,
programmable-output voltage regulationor precision current
regulation.The LM137HV/LM337HVare ideal complementsthe LM117HV/LM317HV adjustable positive regulators.
Features Output voltage adjustable from −1.2Vto −47V 1.5A output current guaranteed, −55˚Cto +150˚C Line regulation typically 0.01%/V Load regulation typically 0.3% Excellent thermal regulation, 0.002%/W77dB ripple rejection Excellent rejectionof thermal transients50 ppm/˚C temperature coefficient Temperature-independent currentlimit Internal thermal overload protectionP+ Product Enhancement tested Standard 3-lead transistor package Output short circuit protected
Typical Applications
Adjustable Negative Voltage RegulatorDS009066-1
DS009066-25
†C1=1μFsolid tantalumor10μF aluminum electrolytic requiredfor stability. Output capacitorsinthe rangeof1 μFto1000μF ofaluminumor tantalum
electrolyticare commonly usedto provide improved output impedanceand rejectionof transients.
*C2=1μFsolid tantalum isrequiredonlyif regulatoris morethan4"from power-supplyfilter capacitor.
May 1999
LM137HV/LM337HV
3-T
erminal
Adjustable
Negative
Regulators
(High
oltage) 1999 National Semiconductor Corporation DS009066
