Texas Instruments uA 7906 C, uA 7908 C INSTALLATION INSTRUCTIONS

μA7900 SERIES

NEGATIVE-VOLTAGE REGULATORS

SLVS058A ± JUNE 1976 ± REVISED OCTOBER 1996

D

3-Terminal Regulators

KC PACKAGE

D Output Current Up to 1.5 A

(TOP VIEW)

D

No External Components

OUTPUT

D Internal Thermal Overload Protection

INPUT

D

High-Power Dissipation Capability

COMMON

D Internal Short-Circuit Current Limiting

The input terminal is in electrical

D Output Transistor Safe-Area Compensation

contact with the mounting base

D Essentially Equivalent to National LM320

TO±220AB

Series

O

I

description

C

This series of fixed-negative-voltage monolithic

integrated-circuit voltage regulators is designed

to complement Series μA7800 in a wide range of

applications. These applications include on-card

regulation for elimination of noise and distribution

problems associated with single-point regulation.

KTE PACKAGE

Each of these regulators can deliver up to 1.5 A of

(TOP VIEW)

output current. The internal current limiting and

thermal shutdown features of these regulators

OUTPUT

make them essentially immune to overload. In

addition to use as fixed-voltage regulators, these

INPUT

devices can be used with external components to

COMMON

obtain adjustable output voltages and currents

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and also as the power pass element in precision

The input terminal is in electrical con-

regulators.

tact with the mounting base.

O I

C

AVAILABLE OPTIONS

		VO(nom)	PACKAGED DEVICES		CHIP
	TA		HEAT-SINK MOUNTED	HEAT-SINK MOUNTED²	FORM
		(V)
			(KC)	(KTE)	(Y)
		± 5	μA7905CKC	μA7905CKTE	μA7905Y
		± 5.2	μA7952CKC	μA7952CKTE	μA7952Y
		± 6	μA7906CKC	μA7906CKTE	μA7906Y
	0°C to 125°C	± 8	μA7908CKC	μA7908CKTE	μA7908Y
		±12	μA7912CKC	μA7912CKTE	μA7912Y
		±15	μA7915CKC	μA7915CKTE	μA7915Y
		±18	μA7918CKC	μA7918CKTE	μA7918Y
		± 24	μA7924CKC	μA7924CKTE	μA7924Y

² The KTE package is also available taped and reeled.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 1996, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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μA7900 SERIES

NEGATIVE-VOLTAGE REGULATORS

SLVS058A ± JUNE 1976 ± REVISED OCTOBER 1996

schematic

5 V to 8 V

12 V to 18 V

COMMON

5 kΩ

OUTPUT
6.2	V
20 kΩ
0.2 kΩ
INPUT
INPUT

All component values are nominal.

absolute maximum ratings over operating temperature range (unless otherwise noted)

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Input voltage, VI: μA7924C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . ±40 V
All others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . ±35 V
Continuous total power dissipation at (or below): TA = 25°C (see Note 1) . . .	See Dissipation Rating Tables
TC = 90°C (see Note 1) . . .	See Dissipation Rating Tables
Operating free-air, TA, case, TC, or virtual junction, TJ, temperature range . . .	. . . . . . . . . . . . . . . . 0 to 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . ±65 to 150°C
Lead temperature 3.2 mm (1/8 inch) from case for 10 seconds . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . 260°C

NOTE 1: For operation above 25°C free-air or 90°C case temperature, refer to Figures 1 and 2. To avoid exceeding the design maximum virtual junction temperature, these ratings should not be exceeded. Due to variations in individual device electrical characteristics and thermal resistance, the built-in thermal overload protection may be activated at power levels slightly above or below the rated dissipation.

DISSIPATION RATING TABLE Ð FREE-AIR TEMPERATURE

	PACKAGE	TA ≤ 25°C	DERATING FACTOR		TA = 70°C	TA = 105°C		TA = 125°C
		POWER RATING	ABOVE TA = 25°C		POWER RATING	POWER RATING	POWER RATING
	KC	2000 mW	16.0 mW/°C		1280 mW	720 mW		400 mW
	KTE	1900 mW	15.2 mW/°C		1216 mW	684 mW		380 mW
		DISSIPATION RATING TABLE Ð CASE TEMPERATURE
		PACKAGE	TC ≤ 90°C	DERATING FACTOR		TA = 125°C
			POWER RATING		ABOVE TC = 90°C	POWER RATING
		KC	15000 mW		250.0 mW/°C	6250 mW
		KTE	14300 mW		238.0 mW/°C	5970 mW

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

μA7900 SERIES

NEGATIVE-VOLTAGE REGULATORS

SLVS058A ± JUNE 1976 ± REVISED OCTOBER 1996

Maximum Continuous Dissipation ± mW

FREE-AIR TEMPERATURE	CASE TEMPERATURE
DISSIPATATION DERATING CURVE	DISSIPATION DERATING CURVE

2000
1800
1600
1400
1200
1000
800
600
400		Derating factor = 16 mW/°C
200		RθJA ≈ 62.5°C/W
0
25		50		75		100		125		150

TA ± Free-Air Temperature ± °C

	16
W	14
±
Dissipation	12
	10
Continuous	8
	6
Maximum	4
	2	Derating factor = 0.25 W/°C
		above 90°C
		RθJA ≈ 4°C/W
	0
	25	50	75	100	125	150
		TC ± Case Temperature ± °C

Figure 1 Figure 2

recommended operating conditions

www.DataSheet4U.com			MIN	MAX	UNIT
		μA7905C	± 7	± 25
		μA7952C	± 7.2	± 25
		μA7906C	± 8	± 25
	Input voltage, VI	μA7908C	± 10.5	± 25	V
		μA7912C	± 14.5	± 30
		μA7915C	± 17.5	± 30
		μA7918C	± 21	± 33
		μA7924C	± 27	± 28
	Output current, IO			1.5	A
	Operating virtual junction temperature, TJ		0	125	°C

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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