lm78m08 Fairchild Semiconductor, lm78m08 Datasheet

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lm78m08

Manufacturer Part Number
lm78m08
Description
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Manufacturer
Fairchild Semiconductor
Datasheet

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Internal Block Digram
Features
• Output Current up to 0.5A
• Output Voltages of 5, 6, 8, 12, 15, 18, 24V
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area (SOA)Protection
©2008 Fairchild Semiconductor Corporation
LM78MXX
3-Terminal 0.5A Positive Voltage Regulator
INPUT
1
STARTING
CIRCUIT
CURRENT
GENERATOR
REFERENCE
VOLTAGE
ERROR
AMPLIFIER
Description
The LM78MXX series of three-terminal positive regulators are
available in the TO-220/D-PAK package with several fixed output
voltages making it useful in a wide range of applications.
1. Input 2. GND 3. Output
THERMAL
PROTECTION
SOA
PROTECTION
D-PAK
TO-220
1
1
GND
GND
SERIES
PASS
ELEMENT
www.fairchildsemi.com
OUTPUT
R1
R2
3
Rev. 1.0
2
GND

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lm78m08 Summary of contents

Page 1

... Internal Block Digram INPUT 1 CURRENT GENERATOR REFERENCE STARTING VOLTAGE CIRCUIT ©2008 Fairchild Semiconductor Corporation www.fairchildsemi.com Description The LM78MXX series of three-terminal positive regulators are available in the TO-220/D-PAK package with several fixed output voltages making it useful in a wide range of applications. TO-220 GND 1 ...

Page 2

LM78MXX Absolute Maximum Ratings Parameter Input Voltage (for 18V) O (for V = 24V) O Thermal Resistance Junction-Case (Note1) TO-220 (Tc = +25 C) Thermal Resistance Junction-Air (Note1, 2) TO-220 (Ta = +25 C) D-PAK (Ta ...

Page 3

Electrical Characteristics (LM78M06) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout ...

Page 4

... LM78MXX Electrical Characteristics (LM78M08) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current Note: 1 ...

Page 5

Electrical Characteristics (LM78M12) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage V Line Regulation (Note1) V Load Regulation (Note1) V Quiescent Current I Quiescent Current Change Output Voltage Drift V/ T ...

Page 6

Electrical Characteristics (LM78M15) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout ...

Page 7

LM78MXX Electrical Characteristics (LM78M18) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage V Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift V/ T Output Noise ...

Page 8

Electrical Characteristics (LM78M24) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage V Line Regulation (Note1) Load Regulation (Note1) Quiescent Current I Quiescent Current Change Output Voltage Drift V/ T Output Noise ...

Page 9

Typical Applications Notes specify an output voltage, substitute voltage value for "XX" 2. Although no output capacitor is needed for stability, it does improve transient response required if regulator ...

Page 10

LM78MXX 13V < V < 25V LM78M05 C1 0. < -VI < 17V LM78M05 0. LM741 3 4 Figure 4. Adjustable Output ...

Page 11

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 Dimensions in millimeters TO-220 1.52 0.10 0.80 0.10 +0.10 0.50 –0.05 2.54TYP [2.54 ] 0.20 LM78MXX 4.50 0.20 +0.10 1.30 –0.05 2.40 0.20 11 ...

Page 12

LM78MXX Mechanical Dimensions Package 6.60 0.20 5.34 0.30 (0.50) (4.34) MAX0.96 2.30TYP [2.30 0.20] 12 (Continued) Dimensions in millimeters D-PAK (0.50) 0.76 0.10 2.30TYP [2.30 0.20] 6.60 0.20 (5.34) (5.04) (1.50) (2XR0.25) 2.30 0.10 0.50 0.10 0.50 0.10 1.02 0.20 ...

Page 13

... Ordering Information Product Number LM78M05CT LM78M06CT LM78M08CT LM78M12CT LM78M15CT LM78M18CT LM78M24CT LM78M05CDT LM78M06CDT LM78M08CDT LM78M12CDT Package Operating Temperature TO-220 0 ~ +125 CL D-PAK LM78MXX 13 ...

Page 14

... LM78MXX 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. ...

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