Document
MC79L00 SERIES NEGATIVEĆVOLTAGE REGULATORS
D 3-Terminal Regulators D Output Current Up To 100 mA D No External Components Required D Internal Thermal-Overload Protection D Internal Short-Circuit Current Limiting D Direct Replacement for Industry-Standard
MC79L00 Series
D Available in 5% or 10% Selections
SLVS011D − OCTOBER 1982 − REVISED AUGUST 2003
D PACKAGE (TOP VIEW)
OUTPUT INPUT† INPUT†
NC
1 2 3 4
8 NC 7 INPUT† 6 INPUT†
5 COMMON
† Internally connected NC − No internal connection
description/ordering information
LP PACKAGE (TOP VIEW)
This series of fixed negative-voltage integrated-circuit voltage regulators is designed
OUTPUT
for a wide range of applications. These include
INPUT
on-card regulation for elimination of noise and
COMMON
distribution problems associated with single-point
regulation. In addition, they can be used to control series pass elements to make high-current voltage-regulator
circuits. One of these regulators can deliver up to 100 mA of output current. The internal current-limiting and
thermal-shutdown features essentially make the regulators immune to overload. When used as a replacement
for a Zener-diode and resistor combination, these devices can provide an effective improvement in output
impedance of two orders of magnitude, with lower bias current.
ORDERING INFORMATION
TJ
OUTPUT VOLTAGE TOLERANCE
NOMINAL OUTPUT VOLTAGE
(V)
PACKAGE†
ORDERABLE PART NUMBER
TOP-SIDE MARKING
Tube of 75
MC79L05ACD
SOIC (D)
Reel of 2500 MC79L05ACDR
79L05A
−5 Bulk of 1000 MC79L05ACLP
TO-226 / TO-92 (LP) Reel of 2000
MC79L05ACLPR
79L05AC
0°C to 125°C
5%
Tube of 75
MC79L12ACD
SOIC (D)
Reel of 2500 MC79L12ACDR
79L12A
−12 Bulk of 1000 MC79L12ACLP
TO-226 / TO-92 (LP) Reel of 2000
MC79L12ACLPR
79L12AC
Bulk of 1000 MC79L15ACLP
−15 TO-226 / TO-92 (LP) Ammo of 2000 MC79L15ACLPM 79L15AC Reel of 2000 MC79L15ACLPR
10%
−12 TO-226 / TO-92 (LP) Bulk of 1000 MC79L12CLP
−15 SOIC (D)
Tube of 75
MC79L15CD
79L12C 79L15C
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
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.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2003, Texas Instruments Incorporated 1
MC79L00 SERIES NEGATIVEĆVOLTAGE REGULATORS
SLVS011D − OCTOBER 1982 − REVISED AUGUST 2003
equivalent schematic
COMMON
OUTPUT
INPUT
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Input voltage: MC79L05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 V MC79L12, MC79L15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −35 V
Package thermal impedance, θJA (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 140°C/W
Operating free-air, case, or virtual junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Lead temperature 1.6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
VI Input voltage IO Output current TJ Operating virtual junction temperature
MC79L05 MC79L12 MC79L15
MIN −7
−14.5 −17.5
0
MAX −20 −27 −30 100 125
UNIT
V
mA °C
•2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
MC79L00 SERIES NEGATIVEĆVOLTAGE REGULATORS
SLVS011D − OCTOBER 1982 − REVISED AUGUST 2003
electrical characteristics at spe.