KA78M20I - Fairchild Semiconductor Corporation

Fixed Voltage Regulator (Positive)

www.fairchildsemi.com

Rev. 1.0.0

Features

• Ou tput Cu rrent up to 0. 5A

• Output Voltages of 5, 6, 8, 10, 12, 15, 18, 20, 24V

• Thermal Overload Protectio n

• Short Circuit Protec tion

• Output Transistor SOA Protection

• Industrial and commercial temperature range

Description

The MC78MXX (LM78MXX) (KA78MXX) series of thre e-

termina l positive regulators are available in the TO-220/

D- PAK pa cka ge w it h s e veral f ixed output v ol ta ge s ma ki ng it

useful in a wide range of applications.

TO-220

D-PAK

1. Input 2. GND 3. Output

MC78MXX (LM7 8MXX) (KA78 M XX)

3-Terminal 0.5A Po sitive Voltage Regulators

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

Intern al Block Dia gram

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

Absolute Maximum Ratings (Ta=+25°C, Unless otherwise specified)

KA7 8M05/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤ TJ ≤ +125°C, IO=350mA, VI=10V, unle s s othe rwise speci fied, CI = 0.33mF, CO=0.1mF)

NOTE:

1. TMIN<TJ<TMAX

KA78MXX/Rl: TMIN= -40°C, TMAX = +125°C

KA78MXX/R: TMIN= 0°C, TMAX = +125°C

2. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Value Unit

Input Voltage (for VO = 5V to 18V)

(for VO = 24V) VI

VI35

40 V

Thermal Resistance Junction-Cases RθJC 5°C/W

Thermal Resistance Junction-Air RθJA 65 °C/W

Operating Temperature Range KA78MXXI/RI

KA78MXX/R TOPR -40~ + 125

0~ + 125 °C

°C

Storage Temperature Range TSTG -65~ + 150 °C

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25°C 4.855.2 V

IO = 5 to 350mA

VI= 7 to 20V 4.75 5 5.25

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 7 to 25V - - 100 mV

VI = 8 to 25V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 100 mV

IO = 5mA to 200mA, TJ =+25 °C- - 50

Quiescent Current IQTJ=+25°C-4.06mA

Quiescent Current

Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 8 to 25V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C-- 0.5-mV/°C

Output No ise Voltage VNf = 10Hz to 100KHz - 40 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 8 to 18V 62 - - dB

Dropout Voltage VDTJ =+25°C, IO = 500mA - 2 - V

Short Circuit Current ISC TJ=+25°C, VI= 35V - 300 - mA

Peak Current IPK TJ =+25°C - 700 - mA

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

KA7 8M06/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤TJ ≤ +125°C, IO=350mA, VI =11V, unl es s oth er w ise specified, CI = 0.33mF, CO=0.1mF)(

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78 MXX/ R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25°C 5.75 6 6.25 V

IO = 5 to 350mA

VI= 8 to 21V 5.7 6 6.3

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 8 to 25V - - 100 mV

VI = 9 to 25V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 120 mV

IO = 5mA to 200mA, TJ =+25°C- -60

Quiescent Current IQTJ=+25°C-4.06mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 9 to 25V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C-- 0.5-mV/

°C

Output No ise Voltage VNf = 10Hz to 100KHz - 45 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 9 to 19V 59 - - dB

Dropout Voltage VDTJ =+25°C, IO = 500mA - 2 - V

Short Circuit Current ISC TJ= +25°C, V I= 35V - 300 - mA

Peak Current IPK TJ =+25°C - 700 - mA

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

KA78M08/I/R/RI ELECTRI CAL CHARACTERISTICS

(Refer to the test c ircuits, TMIN ≤TJ≤ +125°C, IO=3 50mA , VI=1 4 V, u nless o therwise specified, CI =0.33mF, CO=0.1mF)

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25 °C 7.7 8 8.3 V

IO = 5 to 350mA

VI= 10.5 to 23V 7.6 8 8.4

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 10.5 to 25V - - 100 mV

VI = 11 to 25V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 160 mV

IO = 5mA to 200mA, TJ =+25°C- - 80

Quiescent Current IQTJ=+25°C-4.06mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 10.5 to 25V --0.8

Output Voltage Drift RR IO = 5mA

TJ = 0 to +125°C-- 0.5-mV/

°C

Output No ise Voltage VNf = 10Hz to 100KHz - 52 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 9 to 19V 56 - - dB

Dropout Voltage VDTJ =+25°C,IO = 500mA - 2 - V

Short Circuit Current ISC TJ =+25°C, VI= 35V - 300 - mA

Peak Current IPK TJ =+25°C - 700 - mA

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

KA7 8M10/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤TJ ≤ +125°C, IO=350mA, VI=17V, unless otherwis e specified, CI = 0.33mF, CO=0.1mF)

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ= +25°C 9.6 10 10.4 V

IO = 5 to 350mA

VI= 12.5 to 25V 9.5 10 10.5

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 12.5 to 25V - - 100 mV

VI = 13 to 25V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 200 mV

IO = 5mA to 200mA, TJ =+25°C - - 100

Quiescent Current IQTJ=+25°C-4.16mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 12.5 to 25V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C-- 0.5-mV/

°C

Output No ise Voltage VNf = 10Hz to 100KHz - 65 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 13 to 23V 55 - - dB

Dropout Voltage VDTJ =+25°C, I O = 500mA - 2 - V

Short Circuit Current ISC TJ= +25°C, VI= 35V - 300 - mA

Peak Current IPK TJ =+25°C - 700 - mA

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

KA7 8M12/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤TJ ≤125°C, IO= 350mA, VI = 19V, unless otherwise specified, CI =0.33mF, CO =0.1mF)

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25°C 11.5 12 12.5 V

IO = 5 to 350mA

VI= 14.5 to 27V 11.5 12 12.6

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 14.5 to 30V - - 100 mV

VI = 16 to 30V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 240 mV

IO = 5mA to 200mA, TJ =+25°C - - 120

Quiescent Current IQTJ=+25°C-4.16mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - 0.5 mA

IO = 200mA

VI = 14.5 to 30V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C-- 0.5-mV/

°C

Output No ise Voltage VNf = 10Hz to 100KHz - 75 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 15 to 25V 55 - dB

Dropout Voltage VDTJ =+25°C, IO = 500mA - 2 - V

Short Circuit Current ISC TJ= +25°C, VI= 35V - 300 - mA

Peak Current IPK TJ = +25°C - 700 - mA

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

KA78M15/I/R/RI ELECTRI CAL CHARACTERISTICS

(Refer to the test c ircuits, TMIN ≤TJ ≤ +125°C, IO=350mA, VI =23V, unl es s oth er w ise specified, CI = 0.33mF, CO=0.1mF)

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regulation are speci fied at constant, jun ction t emperature. Change in VO due to heat ing ef fects must be take n

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25°C 14.4 15 15.6 V

IO = 5 to 350mA

VI= 17.5 to 30V 14.25 15 15.75

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 17.5 to 30V - - 100 mV

VI = 20 to 30V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 300 mV

IO = 5mA to 200mA, TJ =+25°C - - 150

Quiescent Current IQTJ=+25°C-4.16mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 17.5 to 30V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C-- 1 -mV/

°C

Output No ise Voltage VNf = 10Hz to 100K Hz - 100 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 18.5 to 28.5V 54 dB

Dropout Voltage VDTJ =+25°C, I O = 500mA - 2 - V

Short Circuit Current ISC TJ= +25°C, VI= 35V - 300 - m A

Peak Current IPK TJ = + 25°C - 700 - mA

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

KA7 8M18/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤TJ ≤ +125°C, IO=350mA, VI =26V, unl es s oth er w ise specified, CI = 0.33mF, CO=0.1mF)

NOTE:

1. TMIN:

KA78MXX/R: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25°C 17.3 18 18.7 V

IO = 5 to 350mA

VI= 20.5 to 33V 17.1 18 18.9

Line Regulation ∆VOIO = 200mA VI= 21 to 33V - - 100 mV

TJ =+25°CV

I = 24 to 33V - - 50

Load Regulation ∆VΟIO = 5mA to 0.5A, TJ =+25°C - - 360 mV

IO = 5mA to 200mA, TJ =+25°C - - 180

Quiescent Current IQTJ =+25°C-4.26mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 21 to 33V --0.8

Output Voltage Drift ∆V/∆TI

O =5mA

TJ =0 to 125°C--1.1 -mV/

°C

Output No ise Voltage V Nf=10Hz to 100KHz 100 - µV/VO

Ripple Rejection RR f=120Hz, IO=300mA 53 - dB

Dropout Voltage VDTJ =+25°C, IO=500mA - 2 - V

Short Circuit Current ISC TJ =+25°C, VI=35V - 300 - mA

Peak Current IPK TJ =+25°C - 700 - mA

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

KA7 8M20/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤TJ≤ +125°C, IO=3 50mA , VI =29 V, unless othe rwise specified, CI = 0.33mF, CO=0.1mF)

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ= +25°C 19.2 20 20.8 V

IO = 5 to 350mA

VI= 23 to 35V 19 20 21

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 23 to 35V - - 100 mV

VI = 24 to 35V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, TJ =+25°C - - 400 mV

IO = 5mA to 200mA, TJ =+25°C - - 200

Quiescent Current IQTJ=+25°C-4.26mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 23 to 35V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C--1.1-mV/

°C

Output No ise Voltage VNf = 10Hz to 100KHz - 110 - mV/VO

Ripple Rejection RR f = 120H z, IO = 300mA

VI = 24 to 34V 53 - - dB

Dropout Voltage VDTJ =+25°C, IO = 500mA - 2 - V

Short Circuit Current ISC TJ = +25°C, VI= 35V - 300 - mA

Peak Current IPK TJ = +25°C - 700 - mA

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

KA7 8M24/I/R/RI Electrical Characteristic s

(Refer to the test c ircuits, TMIN ≤TJ ≤ +125°C, IO=350mA, VI=33V, unless otherwis e specified, CI = 0.33mF, CO=0.1mF)

NOTE:

1. TMIN:

KA78MXX/RI: TMIN = -40°C

KA78MXX/R: TMIN = 0°C

2. Load and line regul ation are specifi e d at constant, j uncti o n temp erature. Change in V O due to he at ing ef fects must be taken

into account separately. Pulse testing with low duty is used.

Parameter Symbol Conditions Min. Typ. Max. Units

Output Voltage VOTJ=+25°C232425V

IO = 5 to 350mA

VI= 27 to 38V 22.8 24 25.2

Line Regulation ∆VOIO = 200mA

TJ =+25°CVI= 27 to 38V - - 100 mV

VI = 28 to 38V - - 50

Load Regulation ∆VOIO = 5mA to 0.5A, T J =+25 °C - - 480 mV

IO = 5mA to 200mA, TJ =+25°C - - 240

Quiescent Current IQTJ=+25°C-4.26mA

Quiescent Current Change ∆IQIO = 5mA to 350mA - - 0.5 mA

IO = 200mA

VI = 27 to 38V --0.8

Output Voltage Drift ∆V/∆TI

O = 5mA

TJ = 0 to +125°C-- 1.2-mV/

°C

Output No ise Voltage VNf = 10Hz to 100KHz - 170 - mV/VO

Ripple Rejection RR f = 120Hz, IO = 300mA

VI = 28 to 38V 50 - - dB

Dropout Voltage VDTJ =+25°C, IO = 500mA - 2 - V

Short Circuit Current ISC TJ= +25 °C, VI= 35V - 300 - mA

Peak Current IPK TJ =+25°C - 700 - mA

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

Typical Applicat ions

Figure 1. Fixed Output Regulator

Figure 2. Constant Current Regulator

Notes:

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

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

3. Required if regulator is located an appreciable distance from power Supply filter

Figure 3. Circuit for Increasing Output Voltage

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

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

Figure 5. 0.5 to 10V Regulator

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

Ordering Information

Device Packag e Operating Temperature

MC78MXXCT (LM78XXCT) (KA78MXX) TO-220 0 ~ + 125°C

KA78MXXI -40 ~ +125°C

MC78MXXCDT (KA78MXXR) D-PAK 0 ~ + 125°C

KA78MXXRI -40 ~ + 125°C

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

Package Dimensions

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

Package Dimensions (Continued)

MC78M XX (LM78MXX) (KA78 MXX)

Fixed Voltage Regulator (Positive)

MC78MXX (LM 78MXX) (KA 7 8M XX)

Fixed Voltage Regulator (Positive)

1/3/00 0.0m 001

Stock#DSxxxxxxxx

 1999 F airch ild Sem ic onduct or C orporation

LIFE SUP PORT POLICY

FAIRCHILD’S PRODUCT S AR E NO T AUTHORIZED FOR USE AS C RITICAL C OMP ONENTS IN LIFE SUPPOR T DE VICE S

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

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

reasona bly expected to cause the failure of the life support

device or system, or to affect its safety or effectiveness.