MC78XX/LM78XX. 3-terminal 1A positive voltage regulator. Features. Description. Internal Block Digram.

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area Protection Description The 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

1 3-terminal 1A positive voltage regulator Features Current up to 1A Voltages of 5, 6, 8, 9, 10, 11, 12, 15, 18, 24V Thermal Overload Protection Short Circuit Protection Transistor Safe Operating area Protection Description The 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 operating 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 D-PAK GND 3. Internal Block Digram Rev Fairchild Semiconductor International

2 Absolute Maximum Ratings Parameter Symbol Value Unit Voltage (for VO = 5V to 18V) (for VO = 24V) Thermal Resistance Junction-Cases RθJC 5 o C/W Thermal Resistance Junction-Air RθJA 65 o C/W Operating Temperature Range (MC78XXCT/LM78XXCT/MC78XXCDT) TOPR 0 ~ +125 o C Storage Temperature Range TSTG -65 ~ +150 o C VI VI V V Electrical Characteristics (MC7805/LM7805) (Refer to test circuit,0 o C < TJ < 125 o C, IO = 500mA, VI = 10V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ=+25 o C MC7805/LM7805 Min. Typ. Max. TJ =+25 o C mA Io 1.0A, PO 15W VI = 7V to 20V VI = 8V to 20V VO = 7V to 25V VI = 8V to 12V IO = 5.0mA to1.5a Load Regulation VO TJ=+25 o C IO =250mA to mA Quiescent Current IQ TJ =+25 o C ma Quiescent Current Change IQ IO = 5mA to 1.0A VI= 7V to 25V ma Voltage Drift VO/ T IO= 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA=+25 o C µv Ripple Rejection RR f = 120Hz VO = 8V to 18V db Dropout Voltage VO IO = 1A, TJ =+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI = 35V, TA =+25 o C ma Peak Current IPK TJ =+25 o C A Unit V 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. 2

3 Electrical Characteristics (MC7806) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 11V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ =+25 o C MC7806 Min. Typ. Max. TJ =+25 o C mA IO 1.0A, PD 15W VI = 8.0V to 21V VI = 9.0V to 21V VI = 8V to 25V VI = 9V to 13V Load Regulation VO TJ =+25 o IO =5mA to 1.5A C IO =250mA to750a Quiescent Current IQ TJ =+25 o C ma Quiescent Current Change IQ IO = 5mA to 1A VI = 8V to 25V ma Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection RR f = 120Hz VI = 9V to 19V db Dropout Voltage VO IO = 1A, TJ =+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI= 35V, TA=+25 o C ma Peak Current IPK TJ =+25 o C A 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. Unit V 3

4 Electrical Characteristics (MC7808) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 14V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ =+25 o C MC7808 Min. Typ. Max. TJ =+25 o C mA IO 1.0A, PO 15W VI = 10.5V to 23V VI = 11.5V to 23V VI = 10.5V to 25V VI = 11.5V to 17V Load Regulation VO TJ =+25 o IO = 5.0mA to 1.5A C IO= 250mA to 750mA Quiescent Current IQ TJ =+25 o C ma IO = 5mA to 1.0A Quiescent Current Change IQ VI = 10.5A to 25V ma VI = 11.5V to 25V - - Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection RR f = 120Hz, VI= 11.5V to db Dropout Voltage VO IO = 1A, TJ=+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI= 35V, TA =+25 o C ma Peak Current IPK TJ =+25 o C A 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. Unit V 4

5 Electrical Characteristics (MC7809) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 15V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ=+25 o C MC7809 Min. Typ. Max. 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. Unit TJ =+25 o C mA IO 1.0A, PD 15W VI= 11.5V to 24V VI = 12.5V to 24V V VI = 11.5V to 25V VI = 12V to 25v Load Regulation VO TJ=+25 o IO = 5mA to 1.5A C IO = 250mA to 750mA Quiescent Current IQ TJ=+25 o C ma IO = 5mA to 1.0A Quiescent Current Change IQ VI = 11.5V to 26V ma VI = 12.5V to 26V Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection f = 120Hz RR VI = 13V to 23V db Dropout Voltage VO IO = 1A, TJ=+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI= 35V, TA =+25 o C ma Peak Current IPK TJ= +25 o C A 5

6 Electrical Characteristics (MC7812) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 19V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ =+25 o C MC7812 Min. Typ. Max. 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. Unit TJ =+25 o C mA IO 1.0A, PD 15W VI = 14.5V to 27V VI= 15.5V to 27V V VI = 14.5V to 30V VI = 16V to 22V Load Regulation VO TJ =+25 o IO = 5mA to 1.5A C IO = 250mA to 750mA Quiescent Current IQ TJ =+25 o C ma IO = 5mA to 1.0A Quiescent Current Change IQ VI = 14.5V to 30V ma VI = 15V to 30V Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection RR f = 120Hz VI = 15V to 25V db Dropout Voltage VO IO = 1A, TJ=+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI = 35V, TA=+25 o C ma Peak Current IPK TJ = +25 o C A 6

7 Electrical Characteristics (MC7815) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 23V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ =+25 o C MC7815 Min. Typ. Max. 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. Unit TJ =+25 o C mA IO 1.0A, PD 15W VI = 17.5V to 30V VI= 18.5V to 30V V VI = 17.5V to 30V VI = 20V to 26V IO = 5mA to 1.5A Load Regulation VO TJ =+25 o C IO = 250mA to mA Quiescent Current IQ TJ =+25 o C ma IO = 5mA to 1.0A Quiescent Current Change IQ VI = 17.5V to 30V ma VI = 18.5V to 30V Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection RR f = 120Hz VI = 18.5V to 28.5V db Dropout Voltage VO IO = 1A, TJ=+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI = 35V, TA=+25 o C ma Peak Current IPK TJ =+25 o C A 7

8 Electrical Characteristics (MC7818) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 27V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ =+25 o C MC7818 Min. Typ. Max. 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. Unit TJ =+25 o C mA IO 1.0A, PD 15W VI = 21V to 33V VI= 22V to 33V V VI = 21V to 33V VI = 24V to 30V Load Regulation VO TJ =+25 o IO = 5mA to 1.5A C IO = 250mA to 750mA Quiescent Current IQ TJ =+25 o C ma IO = 5mA to 1.0A Quiescent Current Change IQ VI = 21V to 33V ma VI = 22V to 33V - - Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection RR f = 120Hz VI = 22V to 32V db Dropout Voltage VO IO = 1A, TJ=+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI = 35V, TA=+25 o C ma Peak Current IPK TJ =+25 o C A 8

9 Electrical Characteristics (MC7824) (Refer to test circuit,0 o C < TJ < +125 o C, IO = 500mA, VI = 33V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Voltage Parameter Symbol Conditions VO Line Regulation VO TJ =+25 o C MC7824 Min. Typ. Max. 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. Unit TJ =+25 o C mA IO 1.0A, PD 15W VI = 27V to 38V VI= 28V to 38V V VI = 27V to 38V VI = 30V to 36V Load Regulation VO TJ =+25 o IO = 5mA to 1.5A C IO = 250mA to 750mA Quiescent Current IQ TJ =+25 o C ma IO = 5mA to 1.0A Quiescent Current Change IQ VI = 27V to 38V ma VI = 28V to 38V Voltage Drift VO/ T IO = 5mA / o C Noise Voltage VN f = 10Hz to 100KHz, TA =+25 o C µv Ripple Rejection RR f = 120Hz VI = 28V to 38V db Dropout Voltage VO IO = 1A, TJ=+25 o C V Resistance RO f = 1KHz mω Short Circuit Current ISC VI = 35V, TA=+25 o C ma Peak Current IPK TJ =+25 o C A 9

10 Typical Perfomance Characteristics Figure 1. Quiescent Current Figure 2. Peak Current Figure 3. Voltage Figure 4. Quiescent Current 10

11 Typical Applications Figure 5. DC Parameters Figure 6. Load Regulation Figure 7. Ripple Rejection Figure 8. Fixed Regulator 11

12 Figure 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 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. I RI 5IQ VO = VXX(1+R2/R1)+IQR2 Figure 10. Circuit for Increasing Voltage MC7805 LM7805 LM741 IRI 5 IQ VO = VXX(1+R2/R1)+IQR2 Figure 11. Adjustable Regulator (7 to 30V) 12

13 Figure 12. High Current Voltage Regulator Figure 13. High Current with Short Circuit Protection LM741 Figure 14. Tracking Voltage Regulator 13

14 MC7815 MC7915 Figure 15. Split Power Supply ( ±15V-1A) Figure 16. Negative Voltage Circuit Figure 17. Switching Regulator 14

15 Mechanical Dimensions Package TO ± ±0.20 (1.70) 1.30 ±0.10 (8.70) ø3.60 ± ± ± ±0.20 (1.46) (1.00) 1.27 ±0.10 (45 ) (3.00) (3.70) ± ± ± MAX. 2.54TYP [2.54 ±0.20] 0.80 ± TYP [2.54 ±0.20] ± ±

16 Mechancal Dimensions (Continued) Package D-PAK 6.60 ± ±0.30 (0.50) (4.34) (0.50) 0.70 ± ± ± ± ±0.20 MAX TYP [2.30±0.20] 2.70 ± ± ± ± TYP [2.30±0.20] 6.10 ± ± ± ± ± ±0.20 (5.34) (5.04) (1.50) (2XR0.25) (0.70) MIN ± ± ±0.20 (0.10) (3.05) (0.90) (1.00) 0.76 ±

17 Ordering Information Product Number Voltage Tolerance Package Operating Temperature LM7805CT ±4% TO ~ C Product Number Voltage Tolerance Package Operating Temperature MC7805CT MC7806CT MC7808CT MC7809CT TO-220 MC7812CT ±4% 0 ~ C MC7815CT MC7818CT MC7824CT MC7809CDT D-PAK 17

18 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 THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. 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, and (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 a significant injury of the user. 2. A critical component in 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. 8/17/00 0.0m 001 Stock#DSxxxxxxxx 2000 Fairchild Semiconductor International

MC78XXE. 3-Terminal 1A Positive Voltage Regulator. Features. Description. Internal Block Digram.

MC78XXE. 3-Terminal 1A Positive Voltage Regulator. Features. Description. Internal Block Digram. -Terminal A Positive Voltage Regulator www.fairchildsemi.com Features Current up to A Voltages of 5, V Thermal Overload Protection Short Circuit Protection Transistor Safe Operating Area Protection Description