LM7812 Fairchild Semiconductor, LM7812 Datasheet

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LM7812

Manufacturer Part Number
LM7812
Description
The LM78XX series of three terminal positive regulators are available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications
Manufacturer
Fairchild Semiconductor
Datasheet
LM78XX/LM78XXA
3-Terminal 1A Positive Voltage Regulator
Features
• Output Current up to 1A
• Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
Ordering Information
Product Number
Output Voltage Tolerance
LM7805CT
LM7806CT
LM7808CT
LM7809CT
LM7810CT
LM7812CT
LM7815CT
LM7818CT
LM7824CT
LM7805ACT
LM7806ACT
LM7808ACT
LM7809ACT
LM7810ACT
LM7812ACT
LM7815ACT
LM7818ACT
LM7824ACT
© 2011 Fairchild Semiconductor Corporation
LM78XX/LM78XXA Rev. 1.1
General Description
The LM78XX series of three terminal positive regulators
are available in the 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 operating area pro-
tection, 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 com-
ponents to obtain adjustable voltages and currents.
Package
±4%
TO-220 (Single Gauge)
±2%
1
September 2011
Operating Temperature
-40°C to +125°C
0°C to +125°C
www.fairchildsemi.com

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LM7812 Summary of contents

Page 1

... LM7812CT LM7815CT LM7818CT LM7824CT LM7805ACT LM7806ACT LM7808ACT LM7809ACT LM7810ACT LM7812ACT LM7815ACT LM7818ACT LM7824ACT © 2011 Fairchild Semiconductor Corporation LM78XX/LM78XXA Rev. 1.1 General Description The LM78XX series of three terminal positive regulators are available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications ...

Page 2

Block Diagram Input 1 Starting Circuit Pin Assignment Absolute Maximum Ratings Absolute maximum ratings are those values beyond which damage to the device may occur. The datasheet specifications should be met, without exception, to ensure that the system design is ...

Page 3

Electrical Characteristics (LM7805) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (1) Regline Line Regulation (1) Regload Load Regulation I Quiescent Current Q ∆ I Quiescent Current Change I Q (2) ∆ ...

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Electrical Characteristics (LM7806) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (3) Regline Line Regulation (3) Regload Load Regulation I Quiescent Current Q ∆ I Quiescent Current Q Change (4) ∆ ∆ ...

Page 5

Electrical Characteristics (LM7808) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (5) Regline Line Regulation (5) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change Q (6) ∆V /∆T Output Voltage Drift ...

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Electrical Characteristics (LM7809) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (7) Regline Line Regulation (7) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (8) ∆V /∆T Output Voltage ...

Page 7

Electrical Characteristics (LM7810) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O Regline (9) Line Regulation Regload Load Regulation (9) I Quiescent Current Q ∆I Quiescent Current Change I Q ∆V /∆T (10) Output Voltage ...

Page 8

... Electrical Characteristics (LM7812) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (11) Regline Line Regulation (11) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (12) ∆V /∆T Output Voltage Drift O V Output Noise Voltage N (12) RR Ripple Rejection V Dropout Voltage ...

Page 9

Electrical Characteristics (LM7815) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (13) Regline Line Regulation (13) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (14) ∆V /∆T Output Voltage ...

Page 10

Electrical Characteristics (LM7818) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (15) Regline Line Regulation (15) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (16) ∆V /∆T Output Voltage ...

Page 11

Electrical Characteristics (LM7824) Refer to the test circuits. -40°C < T Symbol Parameter V Output Voltage O (17) Regline Line Regulation (17) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (18) ∆V /∆T Output Voltage ...

Page 12

Electrical Characteristics (LM7805A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (19) Regline Line Regulation (19) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Q Change (20) ∆V /∆T Output Voltage ...

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Electrical Characteristics (LM7806A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (21) Regline Line Regulation (21) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (22) ∆V /∆T Output ...

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Electrical Characteristics (LM7808A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (23) Regline Line Regulation (23) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (24) ∆V /∆T Output ...

Page 15

Electrical Characteristics (LM7809A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (25) Regline Line Regulation (25) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q (26) ∆V /∆T Output ...

Page 16

Electrical Characteristics (LM7810A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (27) Regline Line Regulation (27) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Q Change (28) ∆V /∆T Output Voltage ...

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... Electrical Characteristics (LM7812A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (29) Regline Line Regulation (29) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q ∆V /∆T Output Voltage Drift O V Output Noise Voltage N (30) RR Ripple Rejection V Dropout Voltage ...

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Electrical Characteristics (LM7815A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (31) Regline Line Regulation (31) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q ∆V /∆T Output Voltage ...

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Electrical Characteristics (LM7818A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (33) Regline Line Regulation (33) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change Q (34) ∆V /∆T Output Voltage ...

Page 20

Electrical Characteristics (LM7824A) Refer to the test circuits. 0°C < Symbol Parameter V Output Voltage O (35) Regline Line Regulation (35) Regload Load Regulation I Quiescent Current Q ∆I Quiescent Current Change I Q ∆V /∆T Output Voltage ...

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Typical Performance Characteristics 10V 5mA O 5.75 5.5 5.25 5 4.75 4.5 -50 - JUNCTION TEMPERATURE (°C) Figure 3. Quiescent Current 1.02 V – ...

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Typical Applications 1 Input 0.33µF Input 120Hz LM78XX/LM78XXA Rev. 1.1 1 LM78XX Input 0.33µF Figure 7. DC Parameters 3 LM78XX 2N6121 or EQ Figure 8. Load Regulation 5.1Ω 1 0.33µF 470µF + Figure 9. ...

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Input C I Notes 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 ...

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Input C 0.33µF I ≥ Figure 13. Adjustable Output Regulator (7V to 30V) Input R1 3Ω V BEQ1 –I B REG ...

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V I 0.33µF COMMON -V IN +20V -20V LM78XX/LM78XXA Rev. 1.1 3 LM78XX 2 0.1µ LM741 + 3 4 TIP42 Figure 16. Tracking Voltage Regulator 1 3 LM7815 2 0.33µF 0.1µF 2.2µF + 1µF + ...

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Input Input 4.7Ω + 10µF LM78XX/LM78XXA Rev. 1 LM78XX Figure 18. Negative Output Voltage Circuit D45H11 470Ω LM78XX 0.33µF 0.5Ω Figure 19. Switching Regulator 26 Output 0.1µF 3 1mH Output 2000µF www.fairchildsemi.com ...

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... Mechanical Dimensions Dimensions in millimeters TO-220 [ SINGLE GAUGE ] © 2011 Fairchild Semiconductor Corporation LM78XX/LM78XXA Rev. 1.1 27 www.fairchildsemi.com ...

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... TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended exhaustive list of all such trademarks. 2Cool FPS AccuPower F-PFS FRFET Auto-SPM Global Power Resource AX-CAP * ® BitSiC Green FPS ...

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