LM304H - National Semiconductor - Datasheet.Directory

TL/H/7754

LM104/LM204/LM304 Negative Regulator

March 1989

LM104/LM204/LM304 Negative Regulator

General Description

The LM104 series are precision voltage regulators which

can be programmed by a single external resistor to supply

any voltage from 40V down to zero while operating from a

single unregulated supply. They can also provide 0.01-per-

cent regulation in circuits using a separate, floating bias

supply, where the output voltage is limited only by the

breakdown of external pass transistors. Although designed

primarily as linear, series regulators, the circuits can be used

as switching regulators, current regulators or in a number of

other control applications. Typical performance characteris-

tics are:

YSubsurface zener reference

Y1 mV regulation no load to full load

Y0.01%/V line regulation

Y0.2 mV/V ripple rejection

Y0.3% temperature stability over military temperature

range

The LM104 series is the complement of the LM105 positive

regulator, intended for systems requiring regulated negative

voltages which have a common ground with the unregulated

supply. By themselves, they can deliver output currents to

25 mA, but external transistors can be added to get any

desired current. The output voltage is set by external resis-

tors, and either constant or foldback current limiting is made

available.

The LM104 is specified for operation over the b55§Cto

125§C military temperature range. The LM204 is specified

for operation over the b25§Ctoa

85§C temperature range.

The LM304 is specified for operation from 0§Ctoa

70§C.

Schematic Diagram

TL/H/7754–1

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

Absolute Maximum Ratings

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

(Note 6)

LM104/LM204 LM304

Input Voltage 50V 40V

Input-Output Voltage Differential 50V 40V

Power Dissipation (Note 1) 500 mW 500 mW

Operating Temperature Range

LM104 b55§Ctoa

125§C

LM204 b25§Ctoa

85§C

LM304 0§Ctoa

70§C

Storage Temperature Range b65§Ctoa

150§Cb65§Ctoa

150§C

Lead Temperature (Soldering, 10 sec.) 260§C for plastic 300§C for hermetic

Electrical Characteristics

Parameter Conditions LM104/LM204 LM304 Units

Min Typ Max Min Typ Max

Input Voltage Range b50 b8b40 b8V

Output Voltage Range b40 b0.015 b30 b0.035 V

Output-Input Voltage IOe20 mA 2.0 50 2.0 40 V

Differential (Note 3) IOe5 mA 0.5 50 0.5 40 V

Load Regulation (Note 4) O sIOs20 mA

RSC e15X15 15mV

Line Regulation (Note 5) VOUT sb5V

DVIN e0.1 VIN 0.056 0.1 0.056 0.1 %

Ripple Rejection C19 e10 mF, f e120 Hz

VIN kb15V 0.2 0,.5 0.2 0.5 mV/V

b7V tVIN tb15V 0.5 1.0 0.5 1.0 mV/V

Output Voltage Scale Factor R2-3 e2.4k 1.8 2.0 2.2 1.8 2.0 2.2 V/kX

Temperature Stability VOsb1V 0.3 1.0 0.3 1.0 %

Output Noise Voltage 10 Hz sfs10 kHz

VOsb5V, C1-9 e0 0.007 0.007 %

C1-9 e10 mF15 15 mV

Standby Current Drain ILe5 mA, VOe0 1.7 2.5 1.7 2.5 mA

VOeb

30V 3.6 5.0 mA

VOeb

40V 3.6 5.0 mA

Long Term Stability VOsb1V 0.01 1.0 0.01 1.0 %

Note 1: The maximum junction temperature of the LM104 is 150§C, while that of the LM204 is 125§C and LM304 is 100§C. For operating at elevated temperatures,

devices in the H10C package must be derated based on a thermal resistance of 150§C/W, junction to ambient, or 45§C/W, junction to case.

Note 2: These specifications apply for junction temperatures between b55§C and 150§C (between b25§C and 100§C for the LM204 and 0§Ctoa

85§C for the

LM304) and for input and output voltages within the ranges given, unless otherwise specified. The load and line regulation specifications are for constant junction

temperature. Temperature drift effects must be taken into account separately when the unit is operating under conditions of high dissipation.

Note 3: When external booster transistors are used, the minimum output-input voltage differential is increased, in the worst case, by approximately 1V.

Note 4: The output currents given, as well as the load regulation, can be increased by the addition of external transistors. The improvement factor will be roughly

equal to the composite current gain of the added transistors.

Note 5: With zero output, the dc line regulation is determined from the ripple rejection. Hence, with output voltages between 0V and b5V, a dc output variation,

determined from the ripple rejection, must be added to find the worst-case line regulation.

Note 6: Refer to RETS104X drawing for military specifications for the LM104.

Typical Performance Characteristics

Load Regulation Load Regulation Current Limiting

Supply Voltage Rejection Preregulated Reference Supply

Supply Voltage Rejection With

Ripple Rejection

Current Limit Sense Voltage Regulator Dropout Voltage Minimum Input Voltage

Line Transient Response Load Transient Response Standby Current Drain

TL/H/7754–7

Connection Diagram

Metal Can Package

TL/H/7754–2

Note: Pin 5 connected to case.

Top View

Order Number LM104H, LM204H or LM304H

See NS Package H10C

Typical Applications

Operating with Separate Bias Supply

²Solid Tantalum

TL/H/7754–3

Basic Regulator Circuit

²Solid Tantalum TL/H/7754–5

Trim R1 for exact scale factor.

High Current Regulator

²Solid Tantalum TL/H/7754–4

Switching Regulator

²Solid Tantalum TL/H/7754–6

*60 turns Ý20 on Arnold Engineering A930157-2 Molybdenum Permalloy Core.

LM104/LM204/LM304 Negative Regulator

Physical Dimensions inches (millimeters)

Metal Can Package (H)

Order Number LM104H, LM204H or LM304H

NS Package Number H10C

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failure to perform, when properly used in accordance support device or system, or to affect its safety or

with instructions for use provided in the labeling, can effectiveness.

be reasonably expected to result in a significant injury

to the user.

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