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LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS
The LM78XX series of three-terminal positive regulators are available in the TO-220/D-PAK 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. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.
TO-220
D-PAK
FEATURES
* * * * * Output Current up to 1A Output Voltages of 5, 6, 8, 9, 10, 11, 12, 15, 18, 24V Thermal Overload Protection Short Circuit Protection Output Transistor SOA Protection
1
1: Input 2: GND 3: Output
ORDERING INFORMATION
Device KA78XXCT KA78XXAT KA78XXIT KA78XXR KA78XXAR KA78XXIR Output Voltage Tolerance 4% 2% 4% 2% 4% D-PAK Packag e TO-220 Operating Temperature 0 ~ +125 C -40 ~ +125 C 0 ~ +125 C -40 ~ +125 C
BLOCK DIAGRAM
Rev. B
(c)1999 Fairchild Semiconductor Corporation
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
ABSOLUTE MAXIMUM RATINGS (TA = +25C, unless otherwise specified)
Characteristic Input Voltage (for VO = 5V to 18V) (for VO = 24V) Thermal Resistance Junction-Cases Thermal Resistance Junction-Air Operating Temperature Range KA78XX/A/R/RA KA78XXI/RI Storage Temperature Range Symbol VI VI RJC RJA TOPR TSTG Value 35 40 5 65 0 ~ +125 -40 ~ +125 -65 ~ +150 Unit V V C/W C/W C C C
LM7805/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMIN < TJ < TMAX, IO = 500mA, VI = 10V, CI= 0.33F, CO= 0.1F, unless otherwise specified) Characteristic Symbol Test Conditions TJ =+25 C Output Voltage VO 5.0mA IO 1.0A, PO 15W VI = 7V to 20V VI = 8V to 20V VO = 7V to 25V TJ=+25C VI = 8V to 12V TJ=+25C IO = 5.0mA to1.5A IO =250mA to 750mA LM7805I LM7805 Min Typ Max Min Typ Max 4.8 5.0 5.2 4.8 5.0 5.2 4.75 5.0 5.25 4.75 5.0 5.25 4.0 1.6 9 4 5.0 100 50 100 50 8 4.0 1.6 9 4 5.0 100 50 100 50 8 mV mV mA mA mV/ C V/Vo dB V m mA A Unit
V
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VO RO ISC IPK
TJ =+25 C IO = 5mA to 1.0A VI= 7V to 25V VI= 8V to 25V IO= 5mA f = 10Hz to 100Khz, TA=+25 C f = 120Hz VO = 8 to 18V IO = 1A, TJ =+25 C f = 1KHz VI = 35V, TA =+25 C TJ =+25 C
0.03 0.5 0.3 -0.8 42 62 73 2 15 230 2.2 62 1.3
0.03 0.5 0.3 1.3 -0.8 42 73 2 15 230 2.2
* TMIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7806/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMIN V
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RD ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7808/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test Circuit, TMIN Min 7.7 7.6
V 7.6 8.0 5.0 2.0 10 5.0 5.0 0.05 0.5 -0.8 52 73 2 17 230 2.2 8.4 160 80 160 80 8 0.5 1.0 mV/ C V/Vo dB V m mA A mV mV mA mA
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7809/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit. TMIN < TJ Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7810/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMIN V
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7811/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMINV
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7812/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMIN V
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7815/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMINMin 14.4
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
5.0mA IO1.0A, PD15W 14.2 VI = 17.5V to 30V 5 VI= 18.5V to 30V VI = 17.5V to 30V TJ =+25C VI = 20V to 26V IO = 5mA to 1.5A TJ =+25C IO = 250mA to 750mA TJ =+25 C IO = 5mA to 1.0A VI = 17.5V to 30V VI = 18.5V to 30V IO = 5mA f = 10Hz to 100Khz, TA =+25 C f = 120Hz VI = 18.5V to 28.5V IO = 1A, TJ=+25 C f = 1KHz VI = 35V, TA=+25 C TJ =+25 C
V 15.75 14.25 300 150 300 150 8 0.5 1.0 -1 90 mV/ C V/VO dB V m mA A
mV mV mA mA
54
70 2 19 250 2.2
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7818/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMINV
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7824/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMINV
Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
VO VO IQ IQ VO/T VN RR VD RO ISC IPK
* T MIN LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7805A/RA ELECTRICAL CHARACTERISTICS
Characteristic Output Voltage Symbol VO
(Refer to the test circuits. TJ = 0 to +I25 C, IO = 1A, V I = 10V, C I= 0.33F, C O= 0.1F, unless otherwise specified) Test Conditions TJ =+25 C IO = 5mA to 1A, PD 5W VI = 7.5 to 20V VI = 7.5 to 25V IO = 500mA VI = 8V to 12V TJ =+25 C VI= 7.3V to 25V VI= 8V to 12V Min 4.9 4.8 Typ 5 5 5 3 5 1.5 9 9 4 5.0 Max 5.1 5.2 50 50 50 25 100 100 50 6 0.5 0.8 0.8 -0.8 10 68 2 17 250 2.2 mV/ C V/VO dB V m mA A V V V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1A IO = 250 to 750mA TJ =+25 C IO = 5mA to 1A VI = 8 V to 25V, IO = 500mA VI = 7.5V to 20V, TJ =+25 C IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 8V to 18V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ= +25 C
Quiescent Current Quiescent Current Change
IQ IQ V/T VN RR VD RO ISC IPK
mA mA
Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
*Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7806A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to+150 C, IO = 1A, V I = 11V, C I= 0.33F, C O= 0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 8.6 to 21V VI= 8.6 to 25V IO = 500mA VI= 9V to 13V TJ =+25 C VI= 8.3V to 21V VI= 9V to 13V Min 5.58 5.76 Typ 6 6 5 3 5 1.5 9 4 5.0 4.3 Max 6.12 6.24 60 60 60 30 100 100 50 6 0.5 0.8 0.8 -0.8 10 65 2 17 250 2.2 mV/ C V/VO dB V m mA A mV mV V Unit
Line Regulation
VO
Load Regulation Quiescent Current Quiescent Current Change
VO IQ IQ V/T VN RR VD RO ISC IPK
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1A IO = 250 to 750mA TJ =+25 C IO = 5mA to 1A VI = 9V to 25V, IO = 500mA VI= 8.5V to 21V, TJ =+25 C IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 9V to 19V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
mA mA
Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7808A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to+150 C, IO = 1A, V I = 14V, C I = 0.33F, C O=0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 8.6 to 21V VI= 10.6 to 25V IO = 500mA VI= 11to 17V TJ =+25 C VI= 10.4V to 23V VI= 11V to 17V Min 7.84 7.7 Typ 8 8 6 3 6 2 12 12 5 5.0 Max 8.16 8.3 80 80 80 40 100 100 50 6 0.5 0.8 0.8 -0.8 10 62 2 18 250 2.2 mV /C V/VO dB V m mA A mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1A IO = 250 to 750mA TJ =+25 C IO = 5mA to 1A VI = 11V to 25V, IO = 500mA VI= 10.6V to 23V, TJ =+25 C
Quiescent Current Quiescent Current Change
IQ IQ V/T VN RR VD RO ISC IPK
mA mA
Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 11.5V to 21.5V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25C TJ=+25 C
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7809A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +125 C, IO = 1A, V I = 15V, C I = 0.33F, C O = 0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 11.2 to 24V VI= 11.7 to 25V IO = 500mA VI= 12.5 to 19V TJ =+25 C VI= 11.5V to 24V VI= 12.5V to 19V Min 8.82 8.65 Typ 9.0 9.0 6 4 6 2 12 12 5 5.0 Max 9.18 9.35 90 45 90 45 100 100 50 6.0 0.8 0.8 0.5 -1.0 10 62 2.0 17 250 2.2 mV/ C V/VO dB V m mA A mA mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.0A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 11.7V to 25V, TJ=+25 C VI = 12V to 25V, IO = 500mA IO = 5mA to 1.0A
Quiescent Current Quiescent Current Change
IQ IQ V/T VN RR VD RO ISC IPK
mA
Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 12V to 22V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7810A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to+125 C, IO = 1A, V I = 16V, C I = 0.33F, CO = 0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI =12.8 to 25V VI= 12.8 to 26V IO = 500mA VI= 13to 20V TJ =+25 C VI= 12.5V to 25V VI= 13V to 20V Min 9.8 9.6 Typ 10 10 8 4 8 3 12 12 5 5.0 Max 10.2 10.4 100 50 100 50 100 100 50 6.0 0.5 0.8 0.5 -1.0 10 62 2.0 17 250 2.2 mV C V/VO dB V m mA A mA mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 13V to 26V, TJ=+25 C VI = 12.8V to 25V, IO = 500mA IO = 5mA to 1.0A
Quiescent Current Quiescent Current Change
IQ IQ V/T VN RR VD RO ISC IPK
mA
Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 14V to 24V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7811A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +125 C, IO = 1A, V I = 18V, C I = 0.33F, C O = 0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 13.8 to 26V VI= 12.8 to 26V IO = 500mA VI= 15 to 21V TJ =+25 C VI= 13.5V to 26V VI= 15V to 21V Min 10.8 10.6 Typ 11.0 11.0 10 4 10 3 12 12 5 5.1 Max 11.2 11.4 110 55 110 55 100 100 50 6.0 0.8 0.8 0.5 -1.0 10 61 2.0 18 250 2.2 mV /C V/VO dB V m mA A mA mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 13.8V to 26V, TJ=+25 C VI = 14V to 27V, IO = 500mA IO = 5mA to 1.0A IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 14V to 24V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IQ IQ VO/T VN RR VD RO ISC IPK
mA
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7812A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +125 C, IO = 1A, V I = 19V, C I = 0.33F, C O= 0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 14.8 to 27V VI= 14.8 to 30V IO = 500mA VI= 16 to 22V TJ =+25C VI= 14.5V to 27V VI= 16V to 22V Min 11.75 11.5 Typ 12 12 10 4 10 3 12 12 5 5.1 Max 12.25 12.5 120 120 120 60 100 100 50 6.0 0.5 0.8 0.8 -1.0 10 60 2.0 18 250 2.2 mV/ C V/VO dB V m mA A mA mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25C IO = 5mA to 1.5A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 15V to 30V, TJ=+25 C VI = 14V to 27V, IO = 500mA IO = 5mA to 1.0A IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 14V to 24V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IQ IQ VO/T VN RR VD RO ISC IPK
mA
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7815A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +150 C, IO =1A, V I=23V, C I = 0.33F, C O=0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 17.7 to 30V VI= 17.9 to 30V IO = 500mA VI= 20 to 26V TJ =+25 C VI= 17.5V to 30V VI= 20V to 26V Min 14.7 14.4 Typ 15 15 10 5 11 3 12 12 5 5.2 Max 15.3 15.6 150 150 150 75 100 100 50 6.0 0.5 0.8 0.8 -1.0 10 58 2.0 19 250 2.2 mV/ C V/VO dB V m mA A mA mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 17.5V to 30V, TJ =+25 C VI = 17.5V to 30V, IO = 500mA IO = 5mA to 1.0A IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 18.5V to 28.5V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IQ IQ VO/T VN RR VD RO ISC IPK
mA
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7818A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +150 C, IO=1A, V I = 27V, C I= 0.33F, C O = 0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 21 to 33V VI= 21 to 33V IO = 500mA VI= 21 to 33V TJ =+25 C VI= 20.6V to 33V VI= 24V to 30V Min 17.64 17.3 Typ 18 18 15 5 15 5 15 15 7 5.2 Max 18.36 18.7 180 180 180 90 100 100 50 6.0 0.5 0.8 0.8 -1.0 10 57 2.0 19 250 2.2 mV/ C V/VO dB V m mA A mA mV mV V Unit
Line Regulation
VO
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 21V to 33V, TJ=+25 C VI = 21V to 33V, IO = 500mA IO = 5mA to 1.0A IO = 5mA f = 10Hz to 100KHz TA =+25 C f = 120Hz, IO = 500mA VI = 18.5V to 28.5V IO = 1A, TJ =+25 C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IQ IQ VO/T VN RR VD RO ISC IPK
mA
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7824A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +150 C, IO =1A, V I = 33V, C I= 0.33F, C O=0.1F, unless otherwise specified) Characteristic Output Voltage Symbol VO Test Conditions TJ =+25 C IO = 5mA to 1A, PD 15W VI = 27.3 to 38V VI= 27 to 38V IO = 500mA VI= 21 to 33V TJ =+25 C
o
Min 23.5 23
Typ 24 24 18 6 18 6 15 15 7 5.2
Max 24.5 25 240 240 240 120 100 100 50 6.0 0.5 0.8 0.8
Unit V
Line Regulation
VO
mV
VI= 26.7V to 38V VI= 30V to 36V
Load Regulation
VO
TJ =+25 C IO = 5mA to 1.5A IO = 5mA to 1.0A IO = 250 to 750mA TJ =+25 C VI = 27.3V to 38V, TJ =+25 C VI = 27.3V to 38V, IO = 500mA IO = 5mA to 1.0A IO = 5mA f = 10Hz to 100KHz TA = 25 C f = 120Hz, IO = 500mA VI = 18.5V to 28.5V IO = 1A, TJ =+25C f = 1KHz VI= 35V, TA =+25 C TJ=+25 C
mV
Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
IQ IQ VO/T VN RR VD RO ISC IPK
mA mA mV/ C V/VO dB V m mA A
-1.5 10 54 2.0 20 250 2.2
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 1 Quiescent Current Fig. 2 Peak Output Current
Fig. 3 Output Voltage
Fig. 4 Quiescent Current
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
TYPICAL APPLICATIONS
Fig. 5 DC Parameters
Fig. 6 Load Regulation
Fig. 7 Ripple Rejection
TYPICAL APPLICATIONS (Continued)
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
Fig. 8 Fixed Output Regulator
Fig. 9 Constant Current Regulator
Notes:
(1) To specify an output voltage. substitute voltage value for "XX." A common ground is required between the input and the Output voltage. The input voltage must remain typically 2.0V above the output voltage even during the low point on the input ripple voltage. (2) CI is required if regulator is located an appreciable distance from power Supply filter. (3) CO improves stability and transient response. Fig. 10 Circuit for Increasing Output Voltage Fig. 11 Adjustable Output Regulator (7 to 30V)
IRI 5 IQ VO = VXX (1+R2/R1)+IQR2
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
TYPICAL APPLICATIONS (Continued)
Fig. 12 High Current Voltage Regulator Fig. 13 High Output Current with Short Circuit Protection
Fig. 14 Tracking Voltage Regulator
Fig. 15 Split Power Supply ( 15V-1A)
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
TYPICAL APPLICATIONS (Continued)
Fig. 16 Negative Output Voltage Circuit Fig. 17 switching Regulator
LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
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ACExTM CoolFETTM CROSSVOLTTM E2CMOSTM FACTTM FACT Quiet SeriesTM FAST(R) FASTrTM GTOTM HiSeCTM
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ISOPLANARTM MICROWIRETM POPTM PowerTrenchTM QSTM Quiet SeriesTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 TinyLogicTM
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 2. A critical component is any component of a life support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. 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 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.

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