MOTOROLA MC78M18CDT, MC78M18BT, MC78M15CDT, MC78M15CDTRK, MC78M15BT Datasheet

 Semiconductor Components Industries, LLC, 2000

April, 2000 – Rev. 7

1 Publication Order Number:

MC78M00/D

MC78M00, MC78M00A
Series

Three-Terminal
Medium Current Positive
V oltage Regulators

The MC78M00/MC78M00A Series positive voltage regulators are
identical to the popular MC7800 Series devices, except that they are
specified for only half the output current. Like the MC7800 devices,
the MC78M00 three–terminal regulators are intended for local,
on–card voltage regulation.

Internal current limiting, thermal shutdown circuitry and safe–area
compensation for the internal pass transistor combine to make these
devices remarkably rugged under most operating conditions.
Maximum output current, with adequate heatsinking is 500 mA.

• No External Components Required

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe–Area Compensation

• MC78M00A High Accuracy (±2%) Available for 5.0 V, 8.0 V , 12 V

and 15 V

Representative Schematic Diagram

This device contains 28 active transistors.

1.0 k 1.0 k

Input

210

6.7
V

16 k

100

200

300

3.6
k

6.4
k

520

6.0 k

2.0 k 3.9 k

6.0
k

2.8 k

40
pF

5.6 k

3.0 k

1.0 k

300

20050

13

0.24

Gnd

Output

10 pF

2.6 k

TO–220

T SUFFIX

CASE 221A

1

http://onsemi.com

DPAK
DT SUFFIX
CASE 369A

MARKING

DIAGRAMS

xx = Voltage Option
Z = A, B, or C Option
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W= Work Week

2

3

See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.

ORDERING INFORMATION

Heatsink surface

connected to Pin 2.

Pin 1. Input

2. Ground

3. Output

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

1

3

8MxxZ

ALYWW

MC

ALYWW

78MxxZT

MC78M00, MC78M00A Series

http://onsemi.com

2

MAXIMUM RATINGS (T

A

= 25°C, unless otherwise noted.)

Rating

Symbol Value Unit

Input Voltage (5.0 V–18 V) V

I

35 Vdc

(20 V–24V) 40

Power Dissipation (Package Limitation)

Plastic Package, T Suffix

TA = 25°C P

D

Internally Limited

Thermal Resistance, Junction–to–Air θ

JA

70 °C/W

Thermal Resistance, Junction–to–Case θ

JC

5.0 °C/W

Plastic Package, DT Suffix

TA = 25°C P

D

Internally Limited

Thermal Resistance, Junction–to–Air θ

JA

92 °C/W

Thermal Resistance, Junction–to–Case θ

JC

5.0 °C/W

Operating Junction Temperature Range T

J

+150 °C

Storage Temperature Range T

stg

–65 to +150 °C

NOTE: ESD data available upon request.

MC78M05C/AC/B ELECTRICAL CHARACTERISTICS (V

I

= 10 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W,

unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

Vdc
MC78M05C 4.8 5.0 5.2
MC78M05AC 4.9 5.0 5.1

Output Voltage Variation V

O

Vdc

(7.0 Vdc ≤ VI ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

MC78M05C 4.75 – 5.25
MC78M05AC 4.80 – 5.20

Line Regulation Reg

line

– 3.0 5.0 mV

(TJ = 25°C, 7.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 20 100
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 10 50

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.0 mA

Quiescent Current Change ∆I

IB

mA
(8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 40 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 8.0 V ≤ VI ≤ 18 V) 62 – –
(IO = 300 mA, f = 120 Hz, 8.0 ≤ VI ≤ 18 V, TJ = 25°C) 62 80 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.2 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M00, MC78M00A Series

http://onsemi.com

3

MC78M06C ELECTRICAL CHARACTERISTICS (V

I

= 11 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

5.75 6.0 6.25 Vdc

Output Voltage Variation V

O

5.7 – 6.3 Vdc

(8.0 Vdc ≤ VI ≤ 21 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

Line Regulation Reg

line

– 5.0 50 mV

(TJ = 25°C, 8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 20 120
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 60

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.0 mA

Quiescent Current Change ∆I

IB

mA
(9.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 45 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 9.0 V ≤ VI ≤ 19 V) 59 – –
(IO = 300 mA, f = 120 Hz, 9.0 V ≤ VI ≤ 19 V, TJ = 25°C) 59 80 –

Dropout Voltage VI – V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.2 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M08C/AC/B ELECTRICAL CHARACTERISTICS (V

I

= 14 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W,

unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

Vdc
MC78M08C 7.70 8.0 8.30
MC78M08AC 7.84 8.0 8.16

Output Voltage Variation V

O

Vdc
(10.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

MC78M08C 7.6 – 8.4
MC78M08AC 7.7 – 8.3

Line Regulation Reg

line

– 6.0 50 mV

(TJ = 25°C, 10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 25 160
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 80

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.0 mA

Quiescent Current Change ∆I

IB

mA
(10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 52 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V) 56 – –
(IO = 300 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V, TJ = 25°C) 56 80 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.2 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M00, MC78M00A Series

http://onsemi.com

4

MC78M09C/B ELECTRICAL CHARACTERISTICS (V

I

= 15 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

8.64 9.0 9.45 Vdc

Output Voltage Variation V

O

8.55 – 9.45 Vdc

(11.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

Line Regulation Reg

line

– 6.0 50 mV

(TJ = 25°C, 11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 25 180
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 90

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.0 mA

Quiescent Current Change ∆I

IB

mA
(11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 52 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 12.5 V ≤VI ≤ 22.5 V) 56 – –
(IO = 300 mA, f = 120 Hz, 12.5 V ≤VI ≤ 22.5 V, TJ = 25°C) 56 80 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.2 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M12C/AC/B ELECTRICAL CHARACTERISTICS (V

I

= 19 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W,

unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

Vdc
MC78M12C 11.50 12 12.50
MC78M12AC 11.76 12 12.24

Output Voltage Variation V

O

Vdc
(14.5 Vdc ≤ VI ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

MC78M12C 11.4 – 12.6
MC78M12AC 11.5 – 12.5

Line Regulation Reg

line

– 8.0 50 mV

(TJ = 25°C, 14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 25 240
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 120

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.0 mA

Quiescent Current Change ∆I

IB

mA
(14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 75 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 15 V ≤VI ≤ 25 V) 55 – –
(IO = 300 mA, f = 120 Hz, 15 V ≤VI ≤ 25 V, TJ = 25°C) 55 80 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.3 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M00, MC78M00A Series

http://onsemi.com

5

MC78M15C/AC/B ELECTRICAL CHARACTERISTICS (V

I

= 23 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W,

unless otherwise noted.)

Characteristics Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

Vdc
MC78M15C 14.4 15 15.6
MC78M15AC 14.7 15 15.3

Output Voltage Variation V

O

Vdc
(17.5 Vdc ≤ VI ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

MC78M15C 14.25 – 15.75
MC78M15AC 14.40 – 15.60

Input Regulation Reg

line

– 10 50 mV

(TJ = 25°C, 17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 25 300
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 150

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.0 mA

Quiescent Current Change ∆I

IB

mA
(17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 90 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V) 54 – –
(IO = 300 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V, TJ = 25°C) 54 70 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.3 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M18C ELECTRICAL CHARACTERISTICS (V

I

= 27 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)

Characteristics Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

17.3 18 18.7 Vdc

Output Voltage Variation V

O

17.1 – 18.9 Vdc

(21 Vdc ≤ VI ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

Line Regulation Reg

line

– 10 50 mV

(TJ = 25°C, 21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 30 360
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 180

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.5 mA

Quiescent Current Change ∆I

IB

mA
(21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 100 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V) 53 – –
(IO = 300 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V, TJ = 25°C) 53 70 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.3 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M00, MC78M00A Series

http://onsemi.com

6

MC78M20C ELECTRICAL CHARACTERISTICS (V

I

= 29 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

19.2 20 20.8 Vdc

Output Voltage Variation V

O

19 – 21 Vdc

(23 Vdc ≤ VI ≤ 35 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

Line Regulation Reg

line

– 10 50 mV

(TJ = 25°C, 23 Vdc ≤ VI ≤ 35 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 30 400
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 200

Input Bias Current (TJ = 25°C) I

IB

– 3.2 6.5 mA

Quiescent Current Change ∆I

IB

mA
(23 Vdc ≤ VI ≤ 35 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 110 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 24 V ≤ VI ≤ 34 V) 52 – –
(IO = 300 mA, f = 120 Hz, 24 V ≤ VI ≤ 34 V, TJ = 25°C) 52 70 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C, VI = 35 V) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.5 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M24C ELECTRICAL CHARACTERISTICS (V

I

= 33 V, IO = 350 mA, 0°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)

Characteristics Symbol Min Typ Max Unit

Output Voltage (TJ = 25°C) V

O

23 24 25 Vdc

Output Voltage Variation V

O

22.8 – 25.2 Vdc

(27 Vdc ≤ VI ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 350 mA)

Line Regulation Reg

line

– 10 50 mV

(TJ = 25°C, 27 Vdc ≤ VI ≤ 38 Vdc, IO = 200 mA)

Load Regulation Reg

load

mV
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) – 30 480
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA) – 10 240

Input Bias Current (TJ = 25°C) I

IB

– 3.2 7.0 mA

Quiescent Current Change ∆I

IB

mA
(27 Vdc ≤ VI ≤ 38 Vdc, IO = 200 mA) – – 0.8
(5.0 mA ≤ IO ≤ 350 mA) – – 0.5

Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) V

n

– 170 – µV

Ripple Rejection RR dB

(IO = 100 mA, f = 120 Hz, 28 V ≤ VI ≤ 38 V) 50 – –
(IO = 300 mA, f = 120 Hz, 28 V ≤ VI ≤ 38 V, TJ = 25°C) 50 70 –

Dropout Voltage VI–V

O

– 2.0 – Vdc

(TJ = 25°C)

Short Circuit Current Limit (TJ = 25°C) I

OS

– 50 – mA

Average Temperature Coefficient of Output Voltage ∆VO/∆T – ±0.5 – mV/°C

(IO = 5.0 mA)

Peak Output Current I

O

– 700 – mA

(TJ = 25°C)

MC78M00, MC78M00A Series

http://onsemi.com

7

DEFINITIONS

Line Regulation – The change in output voltage for a

change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.

Load Regulation – The change in output voltage for a

change in load current at constant chip temperature.

Maximum Power Dissipation – The maximum total

device dissipation for which the regulator will operate
within specifications.

Input Bias Current – That part of the input current that

is not delivered to the load.

Output Noise Voltage – The rms AC voltage at the

output, with constant load and no input ripple, measured
over a specified frequency range.

Long Term Stability – Output voltage stability under

accelerated life test conditions with the maximum rated
voltage listed in the devices’ electrical characteristics and
maximum power dissipation.

Figure 1. DPAK Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

Figure 2. Worst Case Power Dissipation

versus Ambient Temperature (TO–220)

, POWER DISSIPATION (W)

D

P

θJC = 5°C/W
P

D(max)

= 7.52 W

No Heat Sink

θHS = 20°C/W

θHS = 10°C/W

Infinite Heat
Sink

R , THERMAL RESIST ANCE

JAθ

JUNCTION–TO–AIR ( C/W)°

L, LENGTH OF COPPER (mm)

P

D

, MAXIMUM POWER DISSIPATION (W)

R

θJA

10

5.0

3.0

2.0

1.0

0.5

0.3

0.2

0.1

40

50

60

70

80

90

100

TA, AMBIENT TEMPERATURE (°C)

25 50 75 100 125 150

0 10203025155.0

L

L

Free Air
Mounted
Vertically

2.0 oz. Copper

P

D(max)

for TA = 50°C

0

0.4

0.8

1.2

1.6

2.0

2.4

Minimum
Size Pad

MC78M00, MC78M00A Series

http://onsemi.com

8

TJ = 25°C

Figure 3. Peak Output Current versus

Dropout Voltage

Figure 4. Dropout Voltage versus

Junction Temperature

Figure 5. Ripple Rejection versus Frequency Figure 6. Ripple Rejection versus Output Current

Figure 7. Bias Current versus Input Voltage

100

80

60

40

20

1.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 M
f, FREQUENCY (Hz)

RR, R

I

PP

L

E RE

J

E

C

T

IO

N (

d

B)

I

out

= 500 mA

, DROPOUT VOLTAGE (V)

IO

TJ, JUNCTION TEMPERATURE (°C)

2.5

2.0

1.5

1.0

0.5

0

0 25 50 75 100 125 150

–VV

∆VO = 100 mV

IO = 500 mA

IO = 100 mA
IO = 10 mA

RR, RIPPLE REJECTION (dB)

IO, OUTPUT CURRENT (A)

100

80

60

40
30

0.01 0.1 0.5 1.0 10

V

out

= 5.0 V
Vin = 10 V
CO = 0
f = 120 Hz
TJ = 25°C

, BIAS CURRENT (mA)

B

VI, INPUT VOLTAGE (Vdc)

4.0

3.0

2.0

1.0

0

0 5.0 10 15 20 25 30 35 40

I

TJ = 25°C

TJ = 125°C

TJ = 125°C

TJ = 25°C

VO = 5.0 V
IO = 0.5 A

IO, OUTPUT CURRENT (A)

5.0

4.0

3.0

2.0

1.0

0

0.01 0.1 0.5 1.0 10

TJ = 125°C

VI–VO = 5.0 V

Figure 8. Bias Current versus Output Current

, OUTPUT CURRENT (A)

O

VI – VO, DROPOUT VOLTAGE (V)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1
0

0 5.0 10 15 20 25 30 35 40

TJ = 125°C

TJ = 25°C

I

, BIAS CURRENT (mA)

B

I

I

out

= 500 mA

V

out

= 5.0 V
Vin = 10 V
CO = 0
TJ = 25°C

MC78M00, MC78M00A Series

http://onsemi.com

9

APPLICATIONS INFORMATION

Design Considerations

The MC78M00/MC78M00A Series of fixed voltage
regulators are designed with Thermal Overload Protection
that shuts down the circuit when subjected to an excessive
power overload condition, Internal Short Circuit Protection
that limits the maximum current the circuit will pass, and
Output Transistor Safe–Area Compensation that reduces the
output short circuit current as the voltage across the pass
transistor is increased.

In many low current applications, compensation
capacitors are not required. However, it is recommended
that the regulator input be bypassed with a capacitor if the

regulator is connected to the power supply filter with long
wire lengths, or if the output load capacitance is large. An
input bypass capacitor should be selected to provide good
high frequency characteristics to insure stable operation
under all load conditions. A 0.33 µF or larger tantalum,
mylar, or other capacitor having low internal impedance at
high frequencies should be chosen. The bypass capacitor
should be mounted with the shortest possible leads directly
across the regulator’s input terminals. Normally good
construction techniques should be used to minimize ground
loops and lead resistance drops since the regulator has no
external sense lead.

The addition of an operational amplifier allows adjustment to higher
or intermediate values while retaining regulation characteristics.
The minimum voltage obtainable with this arrangement is 2.0 V
greater than the regulator voltage.

Input

MC78M05C

Output

0.33 µF
10 k

MC1741

7

6

4

1.0 k

0.1 µF

3

2

The MC78M00 series can be current boosted with a PNP
transistor. The MJ2955 provides current to 5.0 A. Resistor R in
conjunction with the VBE of the PNP determines when the pass
transistor begins conducting; this circuit is not short circuit
proof. Input–output differential voltage minimum is increased
by VBE of the pass transistor.

XX = 2 digits of type number indicating voltage.

MC78MXXC

Input

Output

R

1.0 µF

MJ2955 or Equiv.

1.0 µF

The circuit of Figure 11 can be modified to provide supply protection
against short circuits by adding a short circuit sense resistor, Rsc,
and an additional PNP transistor. The current sensing PNP must be
able to handle the short circuit current of the three–terminal
regulator .Therefore, a 4.0 A plastic power transistor is specified.

XX = 2 digits of type number indicating voltage.

1.0 µF

MC78MXXC

MJ2955
or Equiv.

Input

Output

R

SC

R

2N6049
or Equiv.

VO, 7.0 V to 20 V
Vin–V

out

≥ 2.0 V

*

+

Figure 9. Current Regulator

The MC78M00 regulators can also be used as a current source
when connected as above. In order to minimize dissipation the
MC78M05C is chosen in this application. Resistor R determines
the current as follows:

For example, a 500 mA current source would require R to be a

5.0 Ω, 10 W resistor and the output voltage compliance would
be the input voltage less 7.0 V.

IO =

5.0 V
R

+ I

IB

IIB = 1.5 mA over line and load changes.

Input

0.33 µF

R

I

O

MC78M05C

Constant
Current to
Grounded

Load

Figure 10. Adjustable Output Regulator

Figure 11. Current Boost Regulator Figure 12. Current Boost with

Short Circuit Protection

MC78M00, MC78M00A Series

http://onsemi.com

10

ORDERING INFORMATION

Shipping

Device Output Voltage Temperature Range Package

Rails

(No Suffix)

Tape & Reel

(RK Suffix)

MC78M05CDT/RK
MC78M05ACDT/RK

°

°

DPAK

75 Units/Rail

2500 Units/Reel

MC78M05CT

T

J

= 0° to

+125°C

MC78M05ACT

5.0 V

TO–220

50 Units/Rail

–

MC78M05BDT/RK

°

°

DPAK 75 Units/Rail 2500 Units/Reel

MC78M05BT

T

J

= –

40° to +125°C

TO–220 50 Units/Rail –

MC78M06CDT/RK

°

°

DPAK

75 Units/Rail 2500 Units/Reel

MC78M06CT

6.0 V

T

J

= 0° to

+125°C

MC78M06BT

TJ = –40° to +125°C

TO–220

50 Units/Rail

–

MC78M08CDT/RK
MC78M08ACDT/RK

°

°

DPAK

75 Units/Rail

2500 Units/Reel

MC78M08CT

T

J

= 0° to

+125°C

MC78M08ACT

8.0 V

TO–220

50 Units/Rail

–

MC78M08BDT/RK

°

°

DPAK 75 Units/Rail 2500 Units/Reel

MC78M08BT

T

J

= –

40° to +125°C

TO–220 50 Units/Rail –

MC78M09CDT/RK

°

°

DPAK

75 Units/Rail 2500 Units/Reel

MC78M09CT

T

J

= 0° to

+125°C

TO–220

50 Units/Rail –

MC78M09BDT/RK

9.0 V

°

°

DPAK 75 Units/Rail 2500 Units/Reel

MC78M09BT

T

J

= –

40° to +125°C

TO–220 50 Units/Rail –
MC78M12CDT/RK
MC78M12ACDT/RK

°

°

DPAK

75 Units/Rail

2500 Units/Reel

MC78M12CT

T

J

= 0° to

+125°C

MC78M12ACT

12 V

TO–220

50 Units/Rail

–

MC78M12BDT/RK

°

°

DPAK 75 Units/Rail 2500 Units/Reel

MC78M12BT

T

J

= –

40° to +125°C

TO–220 50 Units/Rail –
MC78M15CDT/RK
MC78M15ACDT/RK

°

°

DPAK

75 Units/Rail

2500 Units/Reel

MC78M15CT

T

J

= 0° to

+125°C

MC78M15ACT

15 V

TO–220

50 Units/Rail

–

MC78M15BDT/RK

°

°

DPAK 75 Units/Rail 2500 Units/Reel

MC78M15BT

T

J

= –

40° to +125°C

TO–220 50 Units/Rail
MC78M18CDT

°

°

DPAK

75 Units/Rail

MC78M18CT

18 V

T

J

= 0° to

+125°C

MC78M18BT

TJ = –40° to +125°C

MC78M20CT

TJ = 0° to +125°C

–

MC78M20BT

20 V

TJ = –40° to +125°C

TO–220

50 Units/Rail

MC78M24CT

TJ = 0° to +125°C

MC78M24BT

24 V

TJ = –40° to +125°C

MC78M00, MC78M00A Series

http://onsemi.com

11

P ACKAGE DIMENSIONS

TO–220

T SUFFIX

CASE 221A–09

ISSUE AA

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION Z DEFINES A ZONE WHERE ALL
BODY AND LEAD IRREGULARITIES ARE
ALLOWED.

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.570 0.620 14.48 15.75
B 0.380 0.405 9.66 10.28
C 0.160 0.190 4.07 4.82
D 0.025 0.035 0.64 0.88
F 0.142 0.147 3.61 3.73

G 0.095 0.105 2.42 2.66

H 0.110 0.155 2.80 3.93
J 0.018 0.025 0.46 0.64
K 0.500 0.562 12.70 14.27
L 0.045 0.060 1.15 1.52
N 0.190 0.210 4.83 5.33

Q 0.100 0.120 2.54 3.04

R 0.080 0.110 2.04 2.79
S 0.045 0.055 1.15 1.39
T 0.235 0.255 5.97 6.47
U 0.000 0.050 0.00 1.27
V 0.045 ––– 1.15 –––
Z ––– 0.080 ––– 2.04

B

Q

H

Z

L

V

G

N

A

K

F

123

4

D

SEATING
PLANE

–T–

C

S

T

U

R
J

DPAK

DT SUFFIX

CASE 369A–13

ISSUE Z

D

A

K

B
R

V

S

F

L

G

2 PL

M

0.13 (0.005) T

E

C

U

J

H

–T–

SEATING
PLANE

Z

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.235 0.250 5.97 6.35
B 0.250 0.265 6.35 6.73
C 0.086 0.094 2.19 2.38
D 0.027 0.035 0.69 0.88
E 0.033 0.040 0.84 1.01
F 0.037 0.047 0.94 1.19
G 0.180 BSC 4.58 BSC
H 0.034 0.040 0.87 1.01

J 0.018 0.023 0.46 0.58
K 0.102 0.114 2.60 2.89
L 0.090 BSC 2.29 BSC
R 0.175 0.215 4.45 5.46
S 0.020 0.050 0.51 1.27
U 0.020 ––– 0.51 –––
V 0.030 0.050 0.77 1.27
Z 0.138 ––– 3.51 –––

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

123

4

MC78M00, MC78M00A Series

http://onsemi.com

12

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes

without further notice to any products herein. SCILLC makes no warranty , representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability ,
including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or
death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold
SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable
attorney fees arising out of, directly or indirectly , any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer .

PUBLICATION ORDERING INFORMATION

CENTRAL/SOUTH AMERICA:

Spanish Phone: [phone] (Mon–Fri 8:00am to 5:00pm MST)

Email: ONlit–[e-mail]

ASIA/PACIFIC : LDC for ON Semiconductor – Asia Support

Phone: [phone] (Tue–Fri 9:00am to 1:00pm, Hong Kong T ime)

T oll Free from Hong Kong & Singapore:

001–800–4422–3781

Email: ONlit–[e-mail]

JAPAN: ON Semiconductor, Japan Customer Focus Center

4–32–1 Nishi–Gotanda, Shinagawa–ku, T okyo, Japan 141–8549

Phone: [phone]
Email: [e-mail]

ON Semiconductor Website: http://onsemi.com

For additional information, please contact your local
Sales Representative.

MC78M00/D

NORTH AMERICA Literature Fulfillment:

Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA

Phone: [phone] or 800–344–3860 T oll Free USA/Canada
Fax: [phone] or 800–344–3867 Toll Free USA/Canada
Email: [e-mail]

Fax Response Line: 303–675–2167 or 800–344–3810 T oll Free USA/Canada

N. American Technical Support: 800–282–9855 Toll Free USA/Canada
EUROPE: LDC for ON Semiconductor – European Support

German Phone: [phone] (M–F 1:00pm to 5:00pm Munich Time)

Email: ONlit–[e-mail]

French Phone: [phone] (M–F 1:00pm to 5:00pm Toulouse Time)

Email: ONlit–[e-mail]

English Phone: [phone] (M–F 12:00pm to 5:00pm UK Time)

Email: [e-mail]

EUROPEAN TOLL–FREE ACCESS*: 00–800–4422–3781

*Available from Germany, France, Italy , England, Ireland