MOTOROLA MCT7805BT Three-terminal positive fixed voltage regulator Datasheet

Order this document by MCT7800/D
These voltage regulators are monolithic integrated circuits designed as
fixed-voltage regulators for a wide variety of applications including local,
on-card regulation. These regulators employ internal current limiting,
thermal shutdown, and safe-area compensation. With adequate heatsinking
they can deliver output currents in excess of 1.0 A. Although designed
primarily as fixed voltage regulators, these devices can be used with
external components to obtain adjustable voltages and currents.
• Output Current in Excess of 1.0 A
•
•
•
•
•
•
THREE-TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
No External Components Required
Internal Thermal Overload Protection
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Internal Short Circuit Current Limiting
Output Transistor Safe-Area Compensation
Output Voltage Offered with a 4% Tolerance
Available in Surface Mount D2PAK and Standard 3-Lead Transistor
Heatsink surface
connected to Pin 2.
1
Packages
2
3
Pin 1. Input
2. Ground
3. Output
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
1
2
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
This MCT-prefixed device is intended to be a possible replacement for the similar
device with the MC-prefix. Because the MCT device originates from different source
material, there may be subtle differences in typical parameter values or
characteristic curves. Due to the diversity of potential applications, Motorola can not
assure identical performance in all circuits. Motorola recommends that the
customer qualify the MCT-prefixed device in each potential application.
STANDARD APPLICATION
Input
Cin*
0.33 µF
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MCT7805
MCT7806
MCT7808
MCT7809
5.0 V
6.0 V
8.0 V
9.0 V
MCT7812
MCT7815
MCT7818
MCT7824
12 V
15 V
18 V
24 V
MCT78XX
Output
CO**
A common ground is required between the
input and the output voltages. The input voltage
must remain typically 2.0 V above the output
voltage even during the low point on the input
ripple voltage.
ORDERING INFORMATION
Device
Output Voltage
Tolerance
Tested Operating
Temperature Range
Package
Surface Mount
MCT78XXBD2T
TJ = – 40° to +125°C
MCT78XXBT
Insertion Mount
4%
Surface Mount
MCT78XXCD2T
MCT78XXCT
TJ = 0° to +125°C
Insertion Mount
XX, these two digits of the type number indicate
nominal voltage.
** Cin is required if regulator is located an
appreciable distance from power supply filter.
** Some CO is recommended for stability; it does
improve transient response. Values less than
0.1 µF could cause instability.
XX indicates nominal voltage.
 Motorola, Inc. 1994
MOTOROLA
Rev 3
MCT7800
1
MCT7800
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Symbol
Value
Unit
VI
35
Vdc
PD
θJA
θJC
Internally Limited
65
5.0
W
°C/W
°C/W
PD
θJA
θJC
Internally Limited
70
5.0
W
°C/W
°C/W
Tstg
– 65 to +150
°C
TJ
+150
°C
Input Voltage
Power Dissipation
Case 221A
TA = +25°C
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
Case 936 (D2PAK)
TA = +25°C
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
Storage Junction Temperature Range
Operating Junction Temperature
Representative Schematic Diagram
Input
100
100
100
10 k
500
240
200
0.3
Output
3.3 k
2.0 k
6.0 k
0.25 k
2.7 k
1.4 k
28 k
30 pF
5.0 k
500
6.0 k
1.0 k
5.0 k
Gnd
This device contains 19 active transistors.
MCT7800
2
MOTOROLA
MCT7800
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7805B
Characteristics
MCT7805C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
4.8
5.0
5.2
4.8
5.0
5.2
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
7.0 Vdc ≤ Vin ≤ 20 Vdc
8.0 Vdc ≤ Vin ≤ 20 Vdc
VO
—
4.75
—
5.0
—
5.25
4.75
—
5.0
—
5.25
—
—
—
7.0
2.0
100
50
—
—
7.0
2.0
100
50
—
—
2.0
1.5
100
50
—
—
2.0
1.5
100
50
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.3
0.5
—
—
—
—
—
—
1.3
—
0.5
—
65
—
—
65
—
—
2.0
—
—
2.0
—
—
10
—
—
10
—
—
1.3
—
—
1.3
—
—
0.2
—
—
0.2
—
Imax
—
2.2
—
—
2.2
—
A
TCVO
—
0.5
—
—
0.5
—
mV/°C
Line Regulation, TJ = +25°C (Note 2)
7.0 Vdc ≤ Vin ≤ 25 Vdc
8.0 Vdc ≤ Vin ≤ 12 Vdc
Regline
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ Vin ≤ 1.5 A
250 mA ≤ Vin ≤ 750 mA
Regload
Quiescent Current (TJ = +25°C)
IB
Quiescent Current Change
7.0 Vdc ≤ Vin ≤ 25 Vdc
8.0 Vdc ≤ Vin ≤ 25 Vdc
5.0 mA ≤ IO ≤ 1.0 A
∆IB
Ripple Rejection
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
RR
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
VI – VO
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
Output Resistance f = 1.0 kHz
rO
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
ISC
Peak Output Current (TJ = +25°C)
Average Temperature Coefficient of Output Voltage
Vdc
mV
mV
mA
mA
dB
Vdc
µV/VO
mΩ
A
ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7806B
Characteristics
MCT7806C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
5.75
6.0
6.25
5.75
6.0
6.25
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
8.0 Vdc ≤ Vin ≤ 21 Vdc
9.0 Vdc ≤ Vin ≤ 21 Vdc
VO
—
5.7
—
6.0
—
6.3
5.7
—
6.0
—
6.3
—
—
—
7.0
2.0
120
60
—
—
7.0
2.0
120
60
—
—
2.0
1.5
120
60
—
—
2.0
1.5
120
60
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.3
0.5
—
—
—
—
—
—
1.3
—
0.5
—
65
—
—
65
—
Line Regulation, TJ = +25°C (Note 2)
8.0 Vdc ≤ Vin ≤ 25 Vdc
9.0 Vdc ≤ Vin ≤ 13 Vdc
Regline
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ Vin ≤ 1.5 A
250 mA ≤ Vin ≤ 750 mA
Regload
Quiescent Current (TJ = +25°C)
IB
Quiescent Current Change
8.0 Vdc ≤ Vin ≤ 25 Vdc
9.0 Vdc ≤ Vin ≤ 25 Vdc
5.0 mA ≤ IO ≤ 1.0 A
∆IB
Ripple Rejection
9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz
RR
NOTES:
Vdc
mV
mV
mA
mA
dB
1. Tlow = 0°C for MCT78XXC
= – 40°C for MCT78XXB
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting
will reduce the output current to less than 1.0 A at a VI–VO of 15 V or
greater. The MC7800 die will supply more current under the same conditions.
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
Pulse testing with low duty cycle is used.
MOTOROLA
MCT7800
3
MCT7800
ELECTRICAL CHARACTERISTICS (continued) (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7806B
Characteristics
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
MCT7806C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VI – VO
—
2.0
—
—
2.0
—
Vdc
—
10
—
—
10
—
—
1.3
—
—
1.3
—
—
0.2
—
—
0.2
—
µV/VO
Vn
Output Resistance f = 1.0 kHz
rO
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
ISC
Peak Output Current (TJ = +25°C)
Imax
—
2.2
—
—
2.2
—
A
TCVO
—
– 0.8
—
—
– 0.8
—
mV/°C
Average Temperature Coefficient of Output Voltage
mΩ
A
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7808B
Characteristics
MCT7808C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
7.7
8.0
8.3
7.7
8.0
8.3
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
10.5 Vdc ≤ Vin ≤ 23 Vdc
11.5 Vdc ≤ Vin ≤ 23 Vdc
VO
—
7.6
—
8.0
—
8.4
7.6
—
8.0
—
8.4
—
—
—
7.0
2.0
160
80
—
—
7.0
2.0
160
80
—
—
2.0
1.5
160
80
—
—
2.0
1.5
160
80
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
—
63
—
—
63
—
—
2.0
—
—
2.0
—
—
10
—
—
10
—
—
18
—
—
18
—
—
0.2
—
—
0.2
—
Line Regulation, TJ = +25°C (Note 2)
10.5 Vdc ≤ Vin ≤ 25 Vdc
11 Vdc ≤ Vin ≤ 17 Vdc
Regline
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Regload
Quiescent Current (TJ = +25°C)
IB
Quiescent Current Change
10.5 Vdc ≤ Vin ≤ 25 Vdc
11.5 Vdc ≤ Vin ≤ 25 Vdc
5.0 mA ≤ IO ≤ 1.0 A
∆IB
Ripple Rejection
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz
RR
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
VI – VO
Vdc
mV
mV
mA
mA
dB
Vdc
µV/VO
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
Output Resistance f = 1.0 kHz
rO
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
ISC
Peak Output Current (TJ = +25°C)
Imax
—
2.2
—
—
2.2
—
A
TCVO
—
– 0.8
—
—
– 0.8
—
mV/°C
Average Temperature Coefficient of Output Voltage
NOTES:
mΩ
A
1. Tlow = 0°C for MCT78XXC
= – 40°C for MCT78XXB
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting
will reduce the output current to less than 1.0 A at a VI–VO of 15 V or
greater. The MC7800 die will supply more current under the same conditions.
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
Pulse testing with low duty cycle is used.
MCT7800
4
MOTOROLA
MCT7800
ELECTRICAL CHARACTERISTICS (Vin = 15 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7809B
Characteristics
Output Voltage (TJ = +25°C)
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
11.5 Vdc ≤ Vin ≤ 24 Vdc
12.5 Vdc ≤ Vin ≤ 24 Vdc
Line Regulation, TJ = +25°C (Note 2)
11.5 Vdc ≤ Vin ≤ 26 Vdc
11.5 Vdc ≤ Vin ≤ 17 Vdc
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Quiescent Current (TJ = +25°C)
Quiescent Current Change
11.5 Vdc ≤ Vin ≤ 26 Vdc
12.5 Vdc ≤ Vin ≤ 26 Vdc
5.0 mA ≤ IO ≤ 1.0 A
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VO
VO
8.65
9.0
9.35
8.65
9.0
9.35
Vdc
—
8.55
—
9.0
—
9.45
8.55
—
9.0
—
9.45
—
—
—
8.0
4.0
50
25
—
—
8.0
4.0
50
25
—
—
3.0
2.0
50
25
—
—
3.0
2.0
50
25
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
—
62
—
—
62
—
—
2.0
—
—
2.0
—
mV
Regload
IB
∆IB
RR
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
VI – VO
Vn
Output Resistance f = 1.0 kHz
rO
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
Peak Output Current (TJ = +25°C)
ISC
Average Temperature Coefficient of Output Voltage
Vdc
Regline
Ripple Rejection
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
MCT7809C
Imax
TCVO
mV
mA
mA
dB
Vdc
µV/VO
—
10
—
—
10
—
—
18
—
—
18
—
—
0.2
—
—
0.2
—
—
2.2
—
—
2.2
—
A
—
–1.0
—
—
–1.0
—
mV/°C
mΩ
A
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7812B
Characteristics
Output Voltage (TJ = +25°C)
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
14.5 Vdc ≤ Vin ≤ 27 Vdc
15.5 Vdc ≤ Vin ≤ 27 Vdc
Line Regulation, TJ = +25°C (Note 2)
14.5 Vdc ≤ Vin ≤ 30 Vdc
16 Vdc ≤ Vin ≤ 22 Vdc
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Quiescent Current (TJ = +25°C)
Quiescent Current Change
14.5 Vdc ≤ Vin ≤ 30 Vdc
15 Vdc ≤ Vin ≤ 30 Vdc
5.0 mA ≤ IO ≤ 1.0 A
NOTES:
MCT7812C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VO
VO
11.5
12
12.5
11.5
12
12.5
Vdc
—
11.4
—
12
—
12.6
11.4
—
12
—
12.6
—
—
—
10
5.0
240
120
—
—
10
5.0
240
120
—
—
3.0
2.0
240
120
—
—
3.0
2.0
240
120
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
Vdc
Regline
mV
Regload
IB
∆IB
mV
mA
mA
1. Tlow = 0°C for MCT78XXC
= – 40°C for MCT78XXB
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting
will reduce the output current to less than 1.0 A at a VI–VO of 15 V or
greater. The MC7800 die will supply more current under the same conditions.
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
Pulse testing with low duty cycle is used.
MOTOROLA
MCT7800
5
MCT7800
ELECTRICAL CHARACTERISTICS (continued) (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7812B
Characteristics
Ripple Rejection
15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
Peak Output Current (TJ = +25°C)
Average Temperature Coefficient of Output Voltage
Symbol
MCT7812C
Min
Typ
Max
Min
Typ
Max
—
62
—
—
62
—
—
2.0
—
—
2.0
—
—
10
—
—
10
—
—
18
—
—
18
—
—
0.2
—
—
0.2
—
—
2.2
—
—
2.2
—
A
—
–1.0
—
—
–1.0
—
mV/°C
RR
VI – VO
Vn
rO
ISC
Imax
TCVO
Unit
dB
Vdc
µV/VO
mΩ
A
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7815B
Characteristics
MCT7815C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25°C)
VO
14.4
15
15.6
14.4
15
15.6
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
17.5 Vdc ≤ Vin ≤ 30 Vdc
18.5 Vdc ≤ Vin ≤ 30 Vdc
VO
—
14.25
—
15
—
15.75
14.25
—
15
—
15.75
—
—
—
11
5.0
300
150
—
—
11
5.0
300
150
—
—
3.0
2.0
300
150
—
—
3.0
2.0
300
150
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
—
60
—
—
60
—
—
2.0
—
—
2.0
—
—
10
—
—
10
—
—
19
—
—
19
—
—
0.2
—
—
0.2
—
Line Regulation, TJ = +25°C (Note 2)
17.5 Vdc ≤ Vin ≤ 30 Vdc
20 Vdc ≤ Vin ≤ 26 Vdc
Regline
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ Vin ≤ 1.5 A
250 mA ≤ Vin ≤ 750 mA
Regload
Quiescent Current (TJ = +25°C)
IB
Quiescent Current Change
17.5 Vdc ≤ Vin ≤ 30 Vdc
18.5 Vdc ≤ Vin ≤ 30 Vdc
5.0 mA ≤ IO ≤ 1.0 A
∆IB
Ripple Rejection
18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz
RR
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
VI – VO
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vdc
mV
mV
mA
mA
dB
Vdc
µV/VO
Vn
Output Resistance f = 1.0 kHz
rO
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
ISC
Peak Output Current (TJ = +25°C)
Imax
—
2.2
—
—
2.2
—
A
TCVO
—
–1.0
—
—
–1.0
—
mV/°C
Average Temperature Coefficient of Output Voltage
NOTES:
mΩ
A
1. Tlow = 0°C for MCT78XXC
= – 40°C for MCT78XXB
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting
will reduce the output current to less than 1.0 A at a VI–VO of 15 V or
greater. The MC7800 die will supply more current under the same conditions.
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
Pulse testing with low duty cycle is used.
MCT7800
6
MOTOROLA
MCT7800
ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7818B
Characteristics
Output Voltage (TJ = +25°C)
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
21 Vdc ≤ Vin ≤ 33 Vdc
22 Vdc ≤ Vin ≤ 33 Vdc
Line Regulation, TJ = +25°C (Note 2)
21 Vdc ≤ Vin ≤ 33 Vdc
24 Vdc ≤ Vin ≤ 30 Vdc
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ Vin ≤ 1.5 A
250 mA ≤ Vin ≤ 750 mA
Quiescent Current (TJ = +25°C)
Quiescent Current Change
21 Vdc ≤ Vin ≤ 33 Vdc
22 Vdc ≤ Vin ≤ 33 Vdc
5.0 mA ≤ IO ≤ 1.0 A
Ripple Rejection
22 Vdc ≤ Vin ≤ 32 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
Peak Output Current (TJ = +25°C)
Average Temperature Coefficient of Output Voltage
MCT7818C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VO
VO
17.3
18
18.7
17.3
18
18.7
Vdc
—
17.1
—
18
—
18.9
17.1
—
18
—
18.9
—
—
—
11
5.0
360
180
—
—
11
5.0
360
180
—
—
4.0
3.0
360
180
—
—
4.0
3.0
360
180
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
—
59
—
—
59
—
—
2.0
—
—
2.0
—
Vdc
Regline
mV
Regload
IB
∆IB
mV
mA
RR
ViI – VO
Vn
rO
ISC
Imax
TCVO
mA
dB
Vdc
µV/VO
—
10
—
—
10
—
—
19
—
—
19
—
—
0.2
—
—
0.2
—
—
2.2
—
—
2.2
—
A
—
–1.0
—
—
–1.0
—
mV/°C
mΩ
A
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7824B
Characteristics
Output Voltage (TJ = +25°C)
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)
27 Vdc ≤ Vin ≤ 38 Vdc
28 Vdc ≤ Vin ≤ 38 Vdc
Line Regulation, TJ = +25°C (Note 2)
27 Vdc ≤ Vin ≤ 38 Vdc
30 Vdc ≤ Vin ≤ 36 Vdc
Load Regulation, TJ = +25°C (Note 2)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Quiescent Current (TJ = +25°C)
Quiescent Current Change
27 Vdc ≤ Vin ≤ 38 Vdc
28 Vdc ≤ Vin ≤ 38 Vdc
5.0 mA ≤ IO ≤ 1.0 A
Ripple Rejection
28 Vdc ≤ Vin ≤ 38 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = +25°C)
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (TA = +25°C)
Vin = 35 Vdc
Peak Output Current (TJ = +25°C)
Average Temperature Coefficient of Output Voltage
NOTES:
MCT7824C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
VO
VO
23
24
25
23
24
25
Vdc
—
22.8
—
24
—
25.2
22.8
—
24
—
25.2
—
—
—
12
6.0
480
240
—
—
12
6.0
480
240
—
—
5.0
4.0
480
240
—
—
5.0
4.0
480
240
—
5.5
8.0
—
5.5
8.0
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
—
56
—
—
56
—
—
2.0
—
—
2.0
—
Vdc
Regline
mV
Regload
IB
∆IB
mV
mA
RR
VI – VO
Vn
rO
ISC
Imax
TCVO
mA
dB
Vdc
µV/VO
—
10
—
—
10
—
—
20
—
—
20
—
—
0.2
—
—
0.2
—
—
2.2
—
—
2.2
—
A
—
–1.5
—
—
–1.5
—
mV/°C
mΩ
A
1. Tlow = 0°C for MCT78XXC
= – 40°C for MCT78XXB
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting
will reduce the output current to less than 1.0 A at a VI–VO of 15 V or
greater. The MC7800 die will supply more current under the same conditions.
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
Pulse testing with low duty cycle is used.
MOTOROLA
MCT7800
7
MCT7800
Figure 1. Peak Output Current as a Function of
Input-Output Differential Voltage
Figure 2. Ripple Rejection as a Function of
Output Voltages (MCT78XXC)
80
3.0
2.0
TJ = – 40°C
1.0
TJ = +25°C
RR, RIPPLE REJECTION (dB)
I O , OUTPUT CURRENT (A)
4.0
TJ = +125°C
10
20
30
40
VI – VO, INPUT-OUPUT VOLTAGE DIFFERENTIAL (V)
0
0
60
Device
50
40
4.0
Figure 3. Ripple Rejection as a Function of
Frequency (MCT78XXC)
6.0
8.0
Vin
10 V
19 V
23 V
10
12
14
16
18
VO, OUTPUT VOLTAGE (V)
20
22
24
1000
Z O, OUTPUT IMPEDANCE (mΩ )
RR, RIPPLE REJECTION (dB)
MCT7805C
MCT7812C
MCT7815C
Figure 4. Output Impedance as a Function of
Output Voltage (MCT78XXC)
80
60
Vin = 10 V
VO = 5.0 V
IO = 20 mA
40
20
10
f = 120 Hz
IO = 20 mA
∆Vin = 1.0 Vrms
70
100
1.0 k
f, FREQUENCY (Hz)
10 k
100 k
500
300
200
100
f = 120 Hz
IO = 500 mA
CL = 0 µF
50
30
20
10
4.0
8.0
12
16
VO, OUTPUT VOLTAGE (V)
20
24
Figure 5. Quiescent Current as a
Function of Temperature
I B, QUIESCENT CURRENT (mA)
6.0
4.0
2.0
1.0
0
–75
MCT7800
8
Vin = 10 V
VO = 5.0 V
IO = 20 mA
3.0
– 50
– 25
0
25
50
75
TJ, JUNCTION TEMPERATURE (°C)
100
125
MOTOROLA
MCT7800
APPLICATIONS INFORMATION
Design Considerations
The MCT7800 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 regulators’
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.
Figure 6. Worst Case Power Dissipation versus
Ambient Temperature (Case 221A)
θHS = 0°C/W
16
θHS = 5°C/W
12
θHS = 15°C/W
8.0
4.0
0
– 50
2.5
θJC = 5°C/W
θJA = 65°C/W
TJ(max) = +150°C
V I – VO , INPUT-OUTPUT VOLTAGE
DIFFERENTIAL (V)
PD, POWER DISSIPATION (W)
20
Figure 7. Input Output Differential as a
Function of Junction Temperature
No Heatsink
– 25
0
25
50
75
100
TA, AMBIENT TEMPERATURE (°C)
125
IO = 1.0 A
2.0
200 mA
500 mA
1.5
20 mA
0 mA
1.0
∆VO = 2% of VO
– – – Extended Curve for MCT78XXB
0.5
0
–75
150
– 50
– 25
0
25
50
75
TJ, JUNCTION TEMPERATURE (°C)
100
125
JUNCTION-TO-AIR (° C/W)
R θ JA, THERMAL RESISTANCE
80
3.5
PD(max) for TA = 50°C
70
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
Free Air
Mounted
Vertically
60
2.0 oz. Copper
L
Minimum
Size Pad
50
L
40
RθJA
30
3.0
2.5
2.0
1.5
PD, MAXIMUM POWER DISSIPATION (W)
Figure 8. D2PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
1.0
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
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.
MOTOROLA
Quiescent 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.
MCT7800
9
MCT7800
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A-06
-TF
B
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIM Z DEFINES A ZONE WHERE ALL BODY AND
LEAD IRREGULARITIES ARE ALLOWED.
SEATING
PLANE
C
T
S
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z
4
A
Q
1 2 3
U
H
K
Z
R
L
J
V
G
D
INCHES
MIN
MAX
0.570 0.620
0.380 0.405
0.160 0.190
0.025 0.035
0.142 0.147
0.095 0.105
0.110 0.155
0.018 0.025
0.500 0.562
0.045 0.060
0.190 0.210
0.100 0.120
0.080 0.110
0.045 0.055
0.235 0.255
0.000 0.050
0.045
—
—
0.080
MILLIMETERS
MIN
MAX
14.48 15.75
9.66 10.28
4.07
4.82
0.64
0.88
3.61
3.73
2.42
2.66
2.80
3.93
0.46
0.64
12.70 14.27
1.15
1.52
4.83
5.33
2.54
3.04
2.04
2.79
1.15
1.39
5.97
6.47
0.00
1.27
1.15
—
—
2.04
N
D2T SUFFIX
PLASTIC PACKAGE
CASE 936-03
(D2PAK)
OPTIONAL
CHAMFER
A
TERMINAL 4
-T-
U
E
S
K
V
B
H
F
1
2
3
M
P
J
N
D
R
0.010 (0.254) M T
G
C
MCT7800
10
L
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
4. DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 4.
5. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED
0.025 (0.635) MAXIMUM.
DIM
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
U
V
INCHES
MIN
MAX
0.386
0.403
0.356
0.368
0.170
0.180
0.026
0.036
0.045
0.055
0.051 REF
0.100 BSC
0.539
0.579
0.125 MAX
0.050 REF
0.000
0.010
0.088
0.102
0.018
0.026
0.058
0.078
5 _ REF
0.116 REF
0.200 MIN
0.250 MIN
MILLIMETERS
MIN
MAX
9.804 10.236
9.042
9.347
4.318
4.572
0.660
0.914
1.143
1.397
1.295 REF
2.540 BSC
13.691 14.707
3.175 MAX
1.270 REF
0.000
0.254
2.235
2.591
0.457
0.660
1.473
1.981
5 _ REF
2.946 REF
5.080 MIN
6.350 MIN
MOTOROLA
MCT7800
NOTES
MOTOROLA
MCT7800
11
MCT7800
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola 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 Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part.
Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
Literature Distribution Centers:
USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036.
EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England.
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ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong.
MCT7800
12
◊
*MCT7800/D*
1PHX33530-3 PRINTED IN USA (8/94) MPS/POD LINEAR YCAAAA
MCT7800/D
MOTOROLA
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