Datasheet MC78M24, MC78M05, MC78M15, MC78M08, LM78M05 Datasheet (Fairchild Semiconductor)

www.fairchildsemi.com

MC78MXX/LM78MXX

3-Terminal 0.5A Positive Voltage Regulator

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

Internal Block Digram

Description

The MC78MXX/LM78MXX series of three-terminal
positive regulators are available in the TO-220/D-PAK
package with s everal fixed ou tput voltag es making it useful
in a wide range of applications.

TO-220

1

D-PAK

1

1. Input 2. GND 3. Output

GND

GND

INPUT

1

CURRENT
GENERATOR

STARTING
CIRCUIT

©2002 Fairchild Semiconductor Corporation

REFERENCE
VOLTAGE

ERROR
AMPLIFIER

SOA
PROTECTION

THERMAL
PROTECTION

SERIES
PASS
ELEMENT

OUTPUT

3

R1

R2

GND

2

Rev. 1.0.5

MC78MXX/LM78MXX

Absolute Maximum Ratings

Parameter Symbol Value Unit

Input Voltage (for V
(for V

= 24V)

O

= 5V to 18V)

O

Thermal Resistance Junction-Case (Note1)
TO-220 (Tc = +25°C)

V

I

V

I

R

θJC

35
40

2.5 °C/W

Thermal Resistance Junction-Air (Note1, 2)
TO-220 (Ta = +25°C)
D-PAK (Ta = +25°C)

Operating Junction Temperature Range T
Storage Temperature Range T

Note:

1. Thermal resistance test board
Size: 76.2mm * 114.3mm * 1.6mm(1S0P)
JEDEC standard: JESD51 -3, JESD51-7

2. Assume no ambient airflow

R

θJA

OPR
STG

66

°C/W

92

0 ~ +150 °C

-65 ~ +150 °C

Electrical Characteristics (MC78M05/LM78M05)

<

(Refer to the test circuits, 0

T

J

<

+125°C, I

=350mA, VI=10V, unless otherwise specified, CI = 0.33µF, CO=0.1µF)

O

V
V

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C 4.855.2

Output Voltage V

Line Regulation (Note3) ∆V

Load Regulation (Note3) ∆V
Quiescent Current I

O

O

= 5mA to 350mA

I

O

V

= 7V to 20V

I

IO = 200mA
T

=+25°C

J

4.75 5 5.25

= 7V to 25V - - 100

V

I

= 8V to 25V - - 50

V

I

IO = 5mA to 0.5A, TJ =+25°C - - 100

O

Q

= 5mA to 200mA, TJ =+25 °C- - 50

I

O

TJ =+25°C-4.06.0mA

V

mV

mV

IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Q

Output Voltage Drift ∆V/∆T
Output Noise Voltage V

N

Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

D
SC
PK

= 200mA

I

O

V

= 8V to 25V

I

I

= 5mA

O

T

= 0 to +125°C

J

--0.8

--0.5-mV/°C

f = 10Hz to 100kHz - 40 ­f = 120Hz, I

V

= 8V to 18V, TJ =+25 °C

I

= 300mA

O

-80- dB

TJ =+25°C, IO = 500mA - 2 - V
TJ =+25°C, VI = 35V - 300 - mA
TJ =+25°C - 700 - mA

mA

µ

V/Vo

Note:

3. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

2

due to heating effects must be taken

o

MC78MXX/LM78MXX

Electrical Characteristics (MC78M06)

(Refer to the test circuits, 0

< TJ < +125°C, IO=350mA, VI =11V, unless otherwise specified, CI=0.33µF, CO=0.1µF)

(Continued)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C 5.75 6 6.25

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I

O

O

= 5mA to 350mA

I

O

V

= 8V to 21V

I

IO = 200mA
T

= +25°C

J

5.7 6 6.3

V

= 8V to 25V - - 100

I

= 9V to 25V - - 50

V

I

IO = 5mA to 0.5A, TJ = +25°C - - 120

O

Q

= 5mA to 200mA, TJ = +25°C- -60

I

O

TJ = +25°C-4.06.0mA
IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Output Voltage Drift ∆V/∆T
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

SC
PK

Q

N

D

= 200mA

I

O

V

= 9V to 25V

I

I

= 5mA

O

T

= 0 to +125°C

J

--0.8

--0.5-mV/°C

f = 10Hz to 100kHz - 45 ­f = 120Hz, I

V

= 9V to 19V, TJ =+25 °C

I

= 300mA

O

-80-dB

TJ =+25°C, IO = 500mA - 2 - V
TJ = +25°C, VI= 35V - 300 - mA
TJ =+25°C - 700 - mA

µ

V

mV

mV

mA

V/Vo

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

o

3

MC78MXX/LM78MXX

Electrical Characteristics (MC78M08)

(Refer to the test circuits, 0

< TJ < +125°C, IO=350mA, VI=14V, unless otherwise specified, CI = 0.33µF, CO=0.1µF)

(Continued)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ =+25°C7.788.3

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I

O

O

= 5mA to 350mA

I

O

V

= 10.5V to 23V

I

IO = 200mA
T

=+25°C

J

7.6 8 8.4

V

= 10.5V to 25V - - 100

I

= 11V to 25V - - 50

V

I

IO = 5mA to 0.5A, TJ =+25°C - - 160

O

Q

= 5mA to 200mA, TJ =+25°C--80

I

O

TJ = +25°C-4.06.0mA
IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Output Voltage Drift RR
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

SC
PK

Q

N

D

= 200mA

I

O

V

= 10.5V to 25V

I

I

= 5mA

O

T

= 0 to +125°C

J

--0.8

- −0.5 - mV/°C

f = 10Hz to 100kHz - 52 ­f = 120Hz, I

V

= 11.5V to 21.5V, TJ =+25 °C

I

= 300mA

O

-80-dB

TJ = +25°C, IO = 500mA - 2 - V
TJ = +25°C, VI = 35V - 300 - mA
TJ = +25°C - 700 - mA

µ

V

mV

mV

mA

V/Vo

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

4

MC78MXX/LM78MXX

Electrical Characteristics (MC78M12)

(Continued)

(Refer to the test circuits, 0 < TJ < +125°C, IO=350mA, VI=19V, unless otherwise specified, CI =0.33µF, CO=0.1µF)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C 11.5 12 12.5

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I

O

O

= 5mA to 350mA

I

O

V

= 14.5V to 27V

I

IO = 200mA
T

= +25°C

J

11.4 12 12.6

V

= 14.5V to 30V - - 100

I

= 16V to 30V - - 50

V

I

IO = 5mA to 0.5A, TJ = +25°C - - 240

O

Q

= 5mA to 200mA, TJ = +25°C - - 120

I

O

TJ =+25°C-4.16.0mA

V

mV

mV

IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Q

Output Voltage Drift ∆V/∆T
Output Noise Voltage V

N

Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

D
SC
PK

= 200mA

I

O

V

= 14.5V to 30V

I

I

= 5mA

O

T

= 0 to +125°C

J

--0.8

--0.5-mV/°C

f = 10Hz to 100kHz - 75 ­f = 120Hz, I

V

= 15V to 25V, TJ =+25 °C

I

= 300mA

O

-80-dB

TJ =+25°C, IO = 500mA - 2 - V
TJ = +25°C, VI = 35V - 300 - mA
TJ = +25°C - 700 - mA

mA

µ

V/Vo

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

o

5

MC78MXX/LM78MXX

Electrical Characteristics (MC78M15)

(Continued)

(Refer to the test circuits, 0 < TJ < +125°C, IO=350mA, VI=23V, unless otherwise specified, CI =0.33µF, CO=0.1µF)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C 14.4 15 15.6

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I

O

O

= 5mA to 350mA

I

O

V

= 17.5V to 30V

I

IO = 200mA
T

=+25°C

J

14.25 15 15.75

V

= 17.5V to 30V - - 100

I

= 20V to 30V - - 50

V

I

IO = 5mA to 0.5A, TJ =+25°C - - 300

O

Q

= 5mA to 200mA, TJ =+25°C - - 150

I

O

TJ = +25°C-4.16.0mA

V

mV

mV

IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Q

Output Voltage Drift ∆V/∆T
Output Noise Voltage V

N

Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

D
SC
PK

= 200mA

I

O

V

= 17.5V to 30V

I

I

= 5mA

O

T

= 0 to +125°C

J

--0.8

--1 -mV/°C

f = 10Hz to 100kHz - 100 ­f = 120Hz, I

V

= 18.5V to 28.5V, TJ =+25 °C

I

= 300mA

O

-70 - dB

TJ =+25°C, IO = 500mA - 2 - V
TJ = +25°C, VI = 35V - 300 - mA
TJ = +25°C - 700 - mA

mA

µ

V/Vo

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

6

MC78MXX/LM78MXX

Electrical Characteristics (MC78M18)

(Continued)

(Refer to the test circuits, 0 < TJ < +125°C, IO=350mA, VI=26V, unless otherwise specified, CI =0.33µF, CO=0.1µF)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C 17.3 18 18.7

Output Voltage V

O

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆VΟ
Quiescent Current I

Q

= 5mA to 350mA

I

O

O

V

= 20.5V to 33V

I

V

= 21V to 33V - - 100

IO = 200mA
T

= +25°C

J

= 5mA to 0.5A, TJ = +25°C - - 360

I

O

= 5mA to 200mA, TJ = +25°C - - 180

I

O

I

= 24V to 33V - - 50

V

I

17.1 18 18.9

TJ = +25°C-4.26.0mA

V

mV

mV

IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Output Voltage Drift ∆V/∆TI
Output Noise Voltage V

Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

SC
PK

Q

N

= 200mA

I

O

V

= 21V to 33V

I

= 5mATJ = 0 to 125°C--1.1-mV/°C

O

f = 10Hz to 100kHz - 100 - µV/Vo
f = 120Hz, I

T

=+25 °C

J

D

TJ = +25°C, I
TJ = +25°C, VI = 35V - 300 - mA
TJ = +25°C - 700 - mA

--0.8

= 300mA , VI = 22V to 32V

O

= 500mA - 2 - V

O

-70- dB

mA

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

7

MC78MXX/LM78MXX

Electrical Characteristics (MC78M24)

(Continued)

(Refer to the test circuits, 0 < TJ < +125°C, IO=350mA, VI=33V, unless otherwise specified, CI =0.33µF, CO=0.1µF)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ =+25°C232425

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I

O

O

= 5mA to 350mA

I

O

V

= 27V to 38V

I

IO = 200mA
T

=+25°C

J

22.8 24 25.2

V

= 27V to 38V - - 100

I

= 28V to 38V - - 50

V

I

IO = 5mA to 0.5A, TJ =+25°C - - 480

O

Q

= 5mA to 200mA, TJ =+25°C - - 240

I

O

TJ = +25°C-4.26.0mA

V

mV

mV

IO = 5mA to 350mA - - 0.5

Quiescent Current Change ∆I

Q

Output Voltage Drift ∆V/∆T
Output Noise Voltage V

N

Ripple Rejection RR
Dropout Voltage V

Short Circuit Current I
Peak Current I

D
SC
PK

= 200mA

I

O

V

= 27V to 38V

I

I

= 5mA

O

T

= 0 to +125°C

J

--0.8

--1.2-mV/°C

f = 10Hz to 100kHz - 170 ­f = 120Hz, I

V

= 28V to 38V, TJ =+25 °C

I

= 300mA

O

-70- dB

TJ = +25°C, IO = 500mA - 2 - V
TJ = +25°C, VI = 35V - 300 - mA
TJ = +25°C - 700 - mA

mA

µ

V/Vo

Note:

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

due to heating effects must be taken

O

8

Typical Applications

MC78MXX/LM78MXX

1

V

I

C

I

0.3µF

MC78MXX
LM78MXX

2

3

C

O

0.1µF

V

O

Figure 1. Fixed Output Regulator

1

Vxx

R

+I

1

MC78MXX
LM78MXX

I

O

O

2

V

I

C

I

0.33µF

IO =

3

C

O

0.1µF

VXX

I

O

R

1

Figure 2. Constant Current Regulator

Notes:

1. To specify an output voltage, substitute voltage value for "XX"

2. Although no output capacitor is needed for stability, it does improve transient response.

3. C

is required if regulator is located an appreciable distance from power Supply filter

I

1

V

I

C

I

0.33µF

MC78MXX
LM78MXX

2

I

O

IR1 ≥ 5I

O

VO = VXX (1+R2/R1) +IOR

3

C

O

0.1µF

V

XX

2

Figure 3. Circuit f or Increasing Output Voltage

V

O

R

1

R

2

9

MC78MXX/LM78MXX

13V < VI < 25V

V

I

-7 < -VI

V

I

0.33µF

< 17V

1

MC78M05

3

LM78M05

C

I

0.33µF

2

7

6

LM741

4

Figure 4. Adjustable Output Regulator (7 to 30V)

1

MC78M05

3

LM78M05

R4

910Ω

R5

9.1kΩ

6

C1

2

VXX

2
3

7

LM741

4

V

O

0.1µF

C

O

10kΩ

V

O

_

2

R3

3

+

R1

10kΩ

C2

0.1µF

VO = Vxx

R

4

R

1

10

Figure 5. 0.5 to 10V Regulator

Mechanical Dimensions

Package

MC78MXX/LM78MXX

Dimensions in millimeters

TO-220

(1.70)

9.20 ±0.2013.08 ±0.20

1.30 ±0.10

(1.46)

(1.00)

1.27 ±0.10

9.90 ±0.20
(8.70)

ø3.60 ±0.10

(3.70)(3.00)

(45°)

1.52 ±0.10

2.80 ±0.1015.90 ±0.20

18.95MAX.

10.08 ±0.30

4.50 ±0.20

+0.10

1.30

–0.05

2.54TYP

±0.20]

[2.54

10.00 ±0.20

0.80 ±0.10

2.54TYP

±0.20]

[2.54

0.50

+0.10
–0.05

2.40 ±0.20

11

MC78MXX/LM78MXX

Mechanical Dimensions

Package

6.60 ±0.20

5.34 ±0.30
(4.34)(0.50) (0.50)

0.60 ±0.20

0.80 ±0.20

(Continued)

D-PAK

2.70 ±0.20

0.70 ±0.20

6.10 ±0.20

9.50 ±0.30

Dimensions in millimeters

2.30 ±0.10

0.50 ±0.10

±0.10

0.91
MIN0.55

MAX0.96

2.30TYP

[2.30±0.20]

0.76 ±0.10

2.30TYP

[2.30±0.20]

9.50 ±0.30

6.10 ±0.20

2.70 ±0.20

0.89 ±0.10

6.60 ±0.20
(5.34)

(5.04)
(1.50)

(2XR0.25)

0.50 ±0.10

1.02 ±0.20

2.30 ±0.20

(0.90)

(0.70)

(0.10) (3.05)

0.76 ±0.10

(1.00)

12

Ordering Information

Product Number Package Operating Temperature

LM78M05CT TO-220 0 ~ +125°C

Product Number Package Operating Temperature

MC78M05CT
MC78M06CT
MC78M08CT
MC78M12CT
MC78M15CT
MC78M18CT

MC78M24CT
MC78M05CDT
MC78M06CDT
MC78M08CDT
MC78M12CDT

TO-220

0 ~ +125°C

D-PAK

MC78MXX/LM78MXX

13

MC78MXX/LM78MXX

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D 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 IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.

LIFE SUPPORT POL I CY

FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. 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

2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .

instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.

www.fairchildsemi.com

11/12/02 0.0m 001

 2002 Fairchild Semiconductor Corporation

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