National Semiconductor LM104 LM204 LM304 Negative Regulator Data Manual

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LM104/LM204/LM304 Negative Regulator General Description

The LM104 series are precision voltage regulators which The LM104 series is the complement of the LM105 positive can be programmed by single external resistor to supply regulator, intended for systems requiring regulated negative any voltage from 40V down to zero while operating from voltages which have common ground with the unregulated single unregulated supply. They can also provide 0.01-per- supply. By themselves, they can deliver output currents to cent regulation in circuits using separate, floating bias m A, but external transistors can be added to get any supply, where the output voltage is limited only by the desired current. The output voltage is set by external resis- breakdown of external pass transistors. Although designed tors, and either constant or foldback current limiting is made primarily as linear, series regulators, the circuits can be used available.

as switching regulators, current regulators or in number of The LM104 is specified for operation over the b55§C

other control applications. Typical performance characteris- a125§C

military temperature range. The LM204 is specified

tics are: b25§C a85§C

for operation over the to temperature range.

Subsurface zener reference The LM304 is specified for operation from 0§C to a70§C. m V regulation no load to full load 0.01%/V line regulation 0.2 m V/V ripple rejection 0.3% temperature stability over military temperature range

Schematic Diagram

TL/H/7754–1

C1995 National Semiconductor Corporation TL/H/7754 RRD-B30M115/Printed in U. S. A.