View MC78905CT_190020.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS
The MC79XX series of three-terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. TO-220
FEATURES
* * * * * Output Current in Excess of 1A Output Voltages of -5, -6, -8, -12, -15, -18, -24V Internal Thermal Overload Protection Short Circuit Protection Output Transistor Safe-Area Compensation
1: GND 2: Input 3: Output
ORDERING INFORMATION
Device MC79XXCT (LM79XXCT) (KA79XX) KA79XXA Output Voltage Tolerance 4% 2%
TO-220
Package
Operating Temperature
0 ~+125C
BLOCK DIAGRAM
GND
R1 VOLTAGE REFERENCE
R2
Out +
Q1
Q2 PROTECTION CIRCUITRY Rsc
I1
I2
In
Rev. C
(c)1999 Fairchild Semiconductor Corporation
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
ABSOLUTE MAXIMUM RATINGS (TA=+25C, unless otherwise specified)
Characteristic Input Voltage Thermal Resistance Junction-Cases Junction-Air Operating Temperature Range Storage Temperature Range Symbol VI RJC RJA TOPR TSTG Value -35 5 65 0 ~ +125 - 65 ~ +150 Unit V C / W C /W C C
LM7905 ELECTRICAL CHARACTERISTICS
(VI = 10V, lO = 500mA, 0C T J +125C, CI =2.2F, CO =1F, unless otherwise specified.) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25C IO = 5mA to 1A, PO 15W VI = -7 to -20V VI = -7 to -20V IO=1A TJ =25C VI = -8 to -12V IO=1A VI = -7.5 to -25V VI= -8 to -12V IO=1A IO = 5mA to 1.5A Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current VO IQ IQ VO/T VN RR VD ISC IPK TJ =+25C IO = 250 to 750mA TJ =+25C IO = 5mA to 1A VI = -8 to -25V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz, IO = -35V VI = 10V TJ=+25C IO = 1A TJ =+25C, VI = -35V TJ =+25C Min - 4.8 - 4.75 Typ - 5.0 -5.0 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 54 60 2 300 2.2 Max - 5.2 - 5.25 50 25 50 50 100 50 6 0.5 0.8 mV mA mA mV/C V dB V mA A V Unit
mV
Line Regulation
VO
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7906 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Symbol VO VO
(VI = 11V, lO = 500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ = +25C IO = 5mA to 1A, PO 15W VI = - 9 to - 21V VI = - 8 to - 25V TJ = 25C VI= - 9 to -12V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -9 to -25V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz VI = 10V TJ=+ 25C IO = 1A TJ= +25C, VI = -35V TJ= +25C Min - 5.75 - 5.7 Typ -6 -6 10 5 10 3 3 Max - 6.25 - 6.3 120 60 120 mV 60 6 0.5 1.3 -0.5 130 54 60 2 300 2.2 mA mA mV/C V dB V mA A V mV Unit
Line Regulation
Load Regulation
VO IQ IQ VO/T VN RR VD ISC IPK
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7908 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI = 14V, lO = 500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ =+ 25C IO = 5mA to 1A, PO 15W VI = -1.5 to -23V VI = -10.5 to -25V TJ = 25C VI= -11 to -17V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -11.5 to -25V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz VI = 10V TJ=+ 25C IO = 1A TJ=+ 25C, VI = -35V TJ=+ 25C Min - 7.7 - 7.6 Typ -8 -8 10 5 12 4 3 0.05 0.1 -0.6 175 54 60 2 300 2.2 Max - 8.3 - 8.4 100 80 160 mV 80 6 0.5 1 mA mA mV/C V dB V mA A V Unit
mV
Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
VO IQ IQ VO/T VN RR VD ISC IPK
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7909 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI = 14V, lO = 500mA, 0C T J + 125C, CI =2.2F, CO = 1F, unless otherwise specified) Test Conditions TJ =+ 25C IO = 5mA to 1A, PO 15W VI = -1.5 to -23V VI = -10.5 to -25V TJ = 25C VI= -11 to -17V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -11.5 to -25V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz VI = 10V TJ=+ 25C IO = 1A TJ= +25C, VI = -35V TJ =+25C Min - 8.7 - 8.6 Typ - 9.0 - 9.0 10 5 12 4 3 0.05 0.1 -0.6 175 54 60 2 300 2.2 Max - 9.3 - 9.4 180 90 180 mV 90 6 0.5 1 mA mA mV/C V dB V mA A V Unit
mV
Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
VO IQ IQ VO/T VN RR VD ISC IPK
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7912 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI= 18V, lO =500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ = +25C IO = 5mA to 1A, PO 15W VI = -15.5 to -27V V = -14.5 to -30V TJ = 25C I VI= -16 to -22V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -15 to -30V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz VI = 10V TJ= +25C IO = 1A TJ=+ 25C, VI = -35V TJ=+ 25C Min -11.5 -11.4 Typ -12 -12 12 6 12 4 3 0.05 0.1 -0.8 200 54 60 2 300 2.2 Max -12.5 -12.6 240 120 240 mV 120 6 0.5 1 mA mA mV/C V dB V mA A V mV Unit
Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
VO IQ IQ VO/T VN RR VD ISC IPK
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7915 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI = 23V, IO = 500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ =+ 25C IO = 5mA to 1A, PO 15W VI = -18 to -30V VI = -17.5 to -30V TJ = 25C VI= -20 to -26V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -18.5 to -30V IO = 5mA f = 10Hz to 100Khz TA =+ 25C f = 120Hz VI = 10V TJ=+25C IO = 1A TJ=+ 25C, VI = -35V TJ=+ 25C Min -14.4 -14.25 Typ -15 -15 12 6 12 4 3 0.05 0.1 -0.9 250 54 60 2 300 2.2 Max -15.6 -15.75 300 150 300 mV 150 6 0.5 1 mA mA mV/C V dB V mA A V mV Unit
Load Regulation
VO IQ IQ VO/T VN RR VD ISC IPK
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7918 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI = 27V, lO = 500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ =+ 25C IO = 5mA to 1A, PO 15W VI = -22.5 to -33V TJ = 25C VI= -21 to -33V VI= -24 to -30V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -22 to -33V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz VI = 10V TJ=+ 25C IO = 1A TJ=+ 25C, VI = -35V TJ=+ 25C Min -17.3 -17.1 Typ -18 -18 15 8 15 5 3 Max -18.7 -18.9 360 180 360 mV 180 6 0.5 1 mA mA mV/C V dB V mA A V mV Unit
Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
VO IQ IQ VO/T VN RR VD ISC IPK
-1 300 54 60 2 300 2.2
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7924 ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI = 33V, lO = 500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ =+25C IO = 5mA to 1A, PO 15W VI = -27 to -38V VI = - 27 to - 38V TJ = 25C VI= - 30 to - 36V TJ = +25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -27 to -38V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz VI = 10V TJ= +25C IO = 1A TJ=+ 25C, VI = -35V TJ=+25C Min - 23 - 22.8 Typ - 24 - 24 15 8 15 5 3 Max - 25 - 25.2 480 180 480 mV 240 6 0.5 1 mA mA mV/C V dB V mA A V mV Unit
Load Regulation
VO IQ IQ VO/T VN RR VD ISC IPK
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
-1 400 54 60 2 300 2.2
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7905A ELECTRICAL CHARACTERISTICS
(VI = 10V, lO = 500mA, 0C T J +125C, CI =2.2F, CO =1F, unless otherwise specified.) Characteristic Output Voltage Symbol VO Test Conditions TJ =+ 25C IO = 5mA to 1A, PO 15W VI = -7 to -20V VI = -7 to -20V IO=1A TJ =+25C VI = -8 to -12V IO=1A VI = -7.5 to -25V VI= -8 to -12V IO=1A IO = 5mA to 1.5A Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current VO IQ IQ VO/T VN RR VD ISC IPK TJ =+ 25C IO = 250 to 750mA TJ = +25C IO = 5mA to 1A VI = -8 to -25V IO = 5mA f = 10Hz to 100KHz TA =+ 25C f = 120Hz, IO = -35V VI = 10V TJ=+ 25C IO = 1A TJ =+ 25C, VI = -35V TJ =+ 25C Min - 4.9 - 4.8 Typ - 5.0 -5.0 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 54 60 2 300 2.2 Max - 5.1 - 5.2 50 25 50 50 100 50 6 0.5 0.8 mV mA mA mV/C V dB V mA A V Unit
mV
Line Regulation
VO
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7912A ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI= 18V, lO =500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ =+ 25C IO = 5mA to 1A, PO 15W VI = -15.5 to -27V V = -14.5 to -30V TJ =+25C I VI= -16 to -22V TJ = +25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -15 to -30V IO = 5mA f = 10Hz to 100Khz TA =+ 25C f = 120Hz VI = 10V TJ=+ 25C IO = 1A TJ=+ 25C, VI = -35V TJ=+ 25C Min -11.75 -11.5 Typ -12 -12 12 6 12 4 3 0.05 0.1 -0.8 200 54 60 2 300 2.2 Max -12.25 -12.5 240 120 240 mV 120 6 0.5 1 mA mA mV/C V dB V mA A V mV Unit
Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
VO IQ IQ VO/T VN RR VD ISC IPK
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7915A ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Line Regulation Symbol VO VO
(VI = 23V, lO = 500mA, 0C T J +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Test Conditions TJ = +25C IO = 5mA to 1A, PO 15W VI = -18 to -30V TJ =+25C VI = -17.5 to -30V VI= -20 to -26V TJ =+ 25C IO = 5mA to 1.5A TJ =+ 25C IO = 250 to 750mA TJ =+ 25C IO = 5mA to 1A VI = -18.5 to -30V IO = 5mA f = 10Hz to 100KHz TA =+25C f = 120Hz VI = 10V TJ= +25C IO = 1A TJ=+ 25C, VI = -35V TJ=+ 25C Min -14.7 -14.4 Typ -15 -15 12 6 12 4 3 0.05 0.1 -0.9 250 54 60 2 300 2.2 Max -15.3 -15.6 300 150 300 mV 150 6 0.5 1 mA mA mV/C V dB V mA A V mV Unit
Load Regulation
VO IQ IQ VO/T VN RR VD ISC IPK
Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
TYPICAL PERFORMANCE CHARACTERISTICS
Fig.1 Output Voltage
5.1
15
Fig. 2 Load Regulation
Load Regulation [mV]
Output Voltage [-V]
5.05 5 4.95 4.9 4.85 4.8 -40 -25 0 25 50
Vin=10V Io=40mA
13 11 9 7 5 3 1 -1 -3 -5
Io=1.5A
Vin=25V Io=100mA
Io=0.75A
75
100
125
-40
-25
0
25
50
75
100
125
TA, Ambient Temperature [ oC] Fig.3 Quiescent Current
5
4 3.5
TA, Ambient Temperature [ oC] Fig. 4 Dropout Voltage
Quiescent Current [mA]
Dropout Voltage [V]
4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 -40 -25 0 25 50 75 100 125
3 2.5 2 1.5 1 0.5 0 -40 -25 0 25 50 75 100 125
Io=1A
TA, Ambient Temperature [oC] Fig.5 Short Circuit Current
0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 -0.05 -0.1 -40 -25 0 25 50 75 100 125
TA, Ambient Temperature [oC]
Short Circuit Current [A]
TA, Ambient Temperature [oC]
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
TYPICAL APPLICATIONS
Fig. 6 Negative Fixed output regulator + 2.2F CI - VI 2 1 KA79XX 3 + 1F CO - VO Notes: (1) To specify an output voltage, substitute voltage value for "XX " (2) Required for stability. For value given, capacitor must be solid tantalum. If aluminum electronics are used, at least ten times value shown should be selected. CI is required if regulator is located an appreciable distance from power supply filter. (3) To improve transient response. If large capacitors are used, a high current diode from input to output (1N400l or similar) should be introduced to protect the device from momentary input short circuit.
Fig. 7 Split power supply ( 12V/1A)
+ 15V +
1
KA7812 2
3 +
+12V
1N4001
0.33F + 2.2F
1F 1F +
*
GND
1N4001
1 - 15V 2 KA7912 3
*
-12V
*: Against potential latch-up problems.
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.
ACExTM CoolFETTM CROSSVOLTTM E2CMOSTM FACTTM FACT Quiet SeriesTM FAST(R) FASTrTM GTOTM HiSeCTM
DISCLAIMER
ISOPLANARTM MICROWIRETM POPTM PowerTrench(R) QFETTM QSTM Quiet SeriesTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8
TinyLogicTM UHCTM VCXTM
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.
Preliminary
First Production
No Identification Needed
Full Production
Obsolete
Not In Production
This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.

▲Up To Search▲

Price & Availability of MC78905CT

	To Download MC78905CT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .