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LM104HMSCN/a17avaiNegative Regulator
LM104HNSN/a2000avaiNegative Regulator
LM204HNSN/a160avaiNegative Regulator
LM304HNSCN/a4avaiNegative Regulator


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LM104H-LM204H-LM304H
Negative Regulator
TL/H/7754
LM104/LM204/LM304
Negative
Regulator
March 1989
LM104/LM204/LM304 Negative Regulator
General Description
The LM104 seriesare precision voltage regulators which
canbe programmedbya single external resistorto supply
any voltage from 40V downto zero while operating froma
single unregulated supply. Theycan also provide 0.01-per-
cent regulationin circuits usinga separate, floating bias
supply, wherethe output voltageis limited onlybythe
breakdownof external pass transistors. Although designed
primarilyas linear, series regulators,the circuitscan beused switching regulators, current regulatorsorina numberof
other control applications. Typical performance characteris-
ticsare: Subsurface zener reference1mV regulationno loadtofull load 0.01%/Vline regulation0.2 mV/V ripple rejection 0.3% temperature stability over military temperature
range
The LM104 seriesisthe complementofthe LM105 positive
regulator, intendedfor systems requiring regulated negative
voltageswhich havea commongroundwiththe unregulated
supply.By themselves, theycan deliver output currentsto mA,but external transistorscanbe addedtoget any
desired current. The output voltageissetby external resis-
tors, andeither constantor foldback current limitingis made
available.
The LM104is specifiedfor operation overthe b55§Cto
a125§C military temperature range.The LM204is specified
for operation overthe b25§Cto a85§C temperature range.
The LM304is specifiedfor operation from 0§Cto a70§C.
Schematic Diagram
TL/H/7754–1
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
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