MC78M20CT Datasheet PDF - Motorola Semiconductors
| Part Number | MC78M20CT | |
| Description | THREE-TERMINAL MEDIUM CURRENT POSITIVE FIXED VOLTAGE REGULATORS | |
| Manufacturers | Motorola Semiconductors | |
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Three-Terminal
Medium Current Positive
Voltage 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
• Previous Commerical Temperature Range has been extended to a
Junction Temperature Range of –40°C to +125°C
Representative Schematic Diagram
1.0 k 1.0 k
Input
210
300
3.6
k
6.4
k
6.7
V 16 k
1.0 k
3.0 k
5.6 k
100
200
300
40
pF
6.0 k
50 200
0.24
13
Output
2.0 k 3.9 k
Order this document by MC78M00/D
MC78M00
MC78M00A
Series
THREE–TERMINAL MEDIUM
CURRENT POSITIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
(TO–220)
Heatsink surface
connected to Pin 2.
Pin 1. Input
2. Ground
3. Output
1
2
3
1
3
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
12 3
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
6.0 2.8 k
k
Gnd
This device contains 28 active transistors.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC78M05AC
MC78M05C
MC78M06C
MC78M08AC
MC78M08C
5.0 V
5.0 V
6.0 V
8.0 V
8.0 V
MC78M09C
MC78M12AC
MC78M12C
MC78M15AC
MC78M15C
9.0 V
12 V
12 V
15 V
15 V
MC78M18C
MC78M20C
MC78M24C
18 V
20 V
24 V
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC78MXXCDT
MC78MXXACDT*
MC78MXXCT
MC78MXXACT*
TJ = – 40° to +125°C
DPAK
TO–220
XX Indicates nominal voltage.
* Available in 5.0, 8.0, 12 and 15 V devices.
© Motorola, Inc. 1997
Rev 6
1
|
| |
 
MC78M00 MC78M00A Series
MC78M15C/AC ELECTRICAL CHARACTERISTICS (VI = 23 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W,
unless otherwise noted.)
Characteristics
Symbol Min Typ
Output Voltage (TJ = 25°C)
MC78M15C
MC78M15AC
Output Voltage Variation
(17.5 Vdc ≤ VI ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
MC78M15C
MC78M15AC
Input Regulation
(TJ = 25°C, 17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V)
(IO = 300 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
VO
VO
Regline
Regload
IIB
∆IIB
Vn
RR
VI–VO
IOS
∆VO/∆T
IO
14.4
14.7
14.25
14.40
–
–
–
–
–
–
–
54
54
–
–
–
–
15
15
–
–
10
25
10
3.2
–
–
90
–
70
2.0
50
±0.3
700
Max
15.6
15.3
15.75
15.60
50
300
150
6.0
0.8
0.5
–
–
–
–
–
–
–
Unit
Vdc
Vdc
mV
mV
mA
mA
µV
dB
Vdc
mA
mV/°C
mA
MC78M18C ELECTRICAL CHARACTERISTICS (VI = 27 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C)
Output Voltage Variation
(21 Vdc ≤ VI ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
Line Regulation
(TJ = 25°C, 21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA)
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V)
(IO = 300 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
VO 17.3 18 18.7 Vdc
VO 17.1 – 18.9 Vdc
Regline
–
10 50 mV
Regload
IIB
∆IIB
Vn
RR
VI–VO
–
–
–
–
–
–
53
53
–
mV
30 360
10 180
3.2 6.5 mA
mA
– 0.8
– 0.5
100 – µV
dB
––
70 –
2.0 – Vdc
IOS – 50 – mA
∆VO/∆T – ±0.3 – mV/°C
IO – 700 – mA
MOTOROLA ANALOG IC DEVICE DATA
5
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| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ MC78M20CT.PDF Datasheet ] | |
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