MC7812E

Manufacturer Part NumberMC7812E
DescriptionThe MC78XXE/LM78XXE/MC78XXAE 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
ManufacturerFairchild Semiconductor
MC7812E datasheet
 


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MC78XXE/LM78XXE/MC78XXAE
3-Terminal 1A Positive Voltage Regulator
Features
• Output Current up to 1A
• Output Voltages of 5, 6, 8, 9, 12, 15, 18, 24V
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
Internal Block Digram
INPUT
1
STARTING
CIRCUIT
©2003 Fairchild Semiconductor Corporation
Description
The MC78XXE/LM78XXE/MC78XXAE 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
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
1. Input 2. GND 3. Output
CURRENT
GENERATOR
REFERENCE
ERROR
VOLTAGE
AMPLIFIER
www.fairchildsemi.com
over 1A output current.
GND
1
GND
1
SERIES
PASS
ELEMENT
SOA
PROTECTION
THERMAL
PROTECTION
OUTPUT
3
GND
2
Rev. 1.0.0

MC7812E Summary of contents

  • Page 1

    ... Output Transistor Safe Operating Area Protection Internal Block Digram INPUT 1 STARTING CIRCUIT ©2003 Fairchild Semiconductor Corporation Description The MC78XXE/LM78XXE/MC78XXAE 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 ...

  • Page 2

    MC78XXE/LM78XXE/MC78XXAE Absolute Maximum Ratings Parameter Input Voltage (for 18V) O (for V = 24V) O Thermal Resistance Junction-Cases (TO-220) Thermal Resistance Junction-Air (TO-220) Operating Temperature Range Storage Temperature Range Electrical Characteristics (MC7805E/LM7805E) (Refer to test circuit ...

  • Page 3

    Electrical Characteristics (MC7806E) (Refer to test circuit ,0 C < T < 125 Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) ...

  • Page 4

    MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7808E) (Refer to test circuit ,0 C < T < 125 Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection ...

  • Page 5

    Electrical Characteristics (MC7809E) (Refer to test circuit ,0 C < T < 125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Regload Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple ...

  • Page 6

    ... MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7812E) (Refer to test circuit ,0 C < T < 125 Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output Resistance (Note2) Short Circuit Current ...

  • Page 7

    Electrical Characteristics (MC7815E) (Refer to test circuit ,0 C < T < 125 Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) ...

  • Page 8

    MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7818E) (Refer to test circuit ,0 C < T < 125 Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection ...

  • Page 9

    Electrical Characteristics (MC7824E) (Refer to test circuit ,0 C < T < 125 Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) ...

  • Page 10

    MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7805AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output ...

  • Page 11

    Electrical Characteristics (MC7806AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output Resistance ...

  • Page 12

    MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7808AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output ...

  • Page 13

    Electrical Characteristics (MC7809AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output Resistance ...

  • Page 14

    MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7812AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output ...

  • Page 15

    Electrical Characteristics (MC7815AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output Resistance ...

  • Page 16

    MC78XXE/LM78XXE/MC78XXAE Electrical Characteristics (MC7818AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output ...

  • Page 17

    Electrical Characteristics (MC7824AE) (Refer to the test circuits < T Parameter Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift (Note2) Output Noise Voltage Ripple Rejection (Note2) Dropout Voltage Output Resistance ...

  • Page 18

    MC78XXE/LM78XXE/MC78XXAE Typical Perfomance Characteristics I Figure 1. Quiescent Current Figure 3. Output Voltage 18 Figure 2. Peak Output Current Figure 4. Quiescent Current ...

  • Page 19

    Typical Applications Input 1 MC78XXE/LM78XXE Input 0.33uF Input Input 1 MC78XXE/LM78XXE 0.33uF Figure 5. DC Parameters 2N6121 OR EQ. Figure 6. Load Regulation 5.1 0.33uF 470uF + 120Hz Figure 7. Ripple Rejection 1 ...

  • Page 20

    MC78XXE/LM78XXE/MC78XXAE Input 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 ...

  • Page 21

    Q1 BD536 Input R1 3 IREG 0.33uF REG Q1 REG Figure 12. High Current Voltage Regulator Input TIP42 Q2 = TIP42 Figure 13. High Output Current with ...

  • Page 22

    MC78XXE/LM78XXE/MC78XXAE +20V -20V Input Input 4.7 + 10uF MC7815E 2 0.1uF 0.33uF 1uF 2.2uF + 1 MC7915E 2 3 Figure 15. Split Power Supply ( ±15V-1A MC78XXE/LM78XXE Figure 16. Negative Output Voltage Circuit 1mH ...

  • Page 23

    Mechanical Dimensions Package 9.90 0.20 (8.70) ø3.60 0.10 1.27 0.10 2.54TYP [2.54 ] 0.20 10.00 0.20 TO-220 1.52 0.10 0.80 0.10 0.50 2.54TYP [2.54 ] 0.20 MC78XXE/LM78XXE/MC78XXAE Dimensions in millimeters 4.50 0.20 +0.10 1.30 –0.05 +0.10 2.40 0.20 –0.05 23 ...

  • Page 24

    MC78XXE/LM78XXE/MC78XXAE Mechancal Dimensions Package 6.60 0.20 5.34 0.30 (0.50) (4.34) MAX0.96 2.30TYP [2.30 0.20] 24 (Continued) D-PAK (0.50) 0.76 0.10 2.30TYP [2.30 0.20] 6.60 (5.34) (5.04) (1.50) (2XR0.25) Dimensions in millimeters 2.30 0.10 0.50 0.10 0.50 0.10 1.02 0.20 2.30 ...

  • Page 25

    ... Product Number Output Voltage Tolerance LM7805ECT Product Number Output Voltage Tolerance MC7805ECT MC7806ECT MC7808ECT MC7809ECT MC7812ECT MC7815ECT MC7818ECT MC7824ECT MC7805ECDT MC7806ECDT MC7808ECDT MC7809ECDT MC7812ECDT MC7805AECT MC7806AECT MC7808AECT MC7809AECT MC7812AECT MC7815AECT MC7818AECT MC7824AECT Package TO-220 ±4% Package TO-220 ±4% D-PAK TO-220 ±2% ...

  • Page 26

    ... MC78XXE/LM78XXE/MC78XXAE DISCLAIMER 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. ...