Motorola MCT7824BT, MCT7824CD2T, MCT7824CT, MCT7818CD2T, MCT7818CT Datasheet
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Three Terminal Positive
Voltage Regulators
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
•No External Components Required
•Internal Thermal Overload Protection
•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 Packages
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.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MCT7805 |
5.0 V |
MCT7812 |
12 V |
MCT7806 |
6.0 V |
MCT7815 |
15 V |
MCT7808 |
8.0 V |
MCT7818 |
18 V |
MCT7809 |
9.0 V |
MCT7824 |
24 V |
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ORDERING INFORMATION
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Output Voltage |
Tested Operating |
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Device |
Tolerance |
Temperature Range |
Package |
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MCT78XXBD2T |
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TJ = ± 40° to +125°C |
Surface Mount |
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MCT78XXBT |
4% |
Insertion Mount |
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MCT78XXCD2T |
TJ = 0° to +125°C |
Surface Mount |
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MCT78XXCT |
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Insertion Mount |
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XX indicates nominal voltage.
Order this document by MCT7800/D
MCT7800
Series
THREE-TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface |
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connected to Pin 2. |
1 |
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2 |
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3 |
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Pin 1. |
Input |
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2. Ground |
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3. |
Output |
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK) 1
3
Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.
STANDARD APPLICATION
Input |
MCT78XX |
Output |
Cin* |
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CO** |
0.33 μF |
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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.
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.
Motorola, Inc. 1994 |
Rev 3 |
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MCT7800 |
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MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.) |
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Rating |
Symbol |
Value |
Unit |
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Input Voltage |
VI |
35 |
Vdc |
Power Dissipation |
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Case 221A |
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TA = +25°C |
PD |
Internally Limited |
W |
Thermal Resistance, Junction-to-Ambient |
θJA |
65 |
°C/W |
Thermal Resistance, Junction-to-Case |
θJC |
5.0 |
°C/W |
Case 936 (D2PAK) |
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TA = +25°C |
PD |
Internally Limited |
W |
Thermal Resistance, Junction-to-Ambient |
θJA |
70 |
°C/W |
Thermal Resistance, Junction-to-Case |
θJC |
5.0 |
°C/W |
Storage Junction Temperature Range |
Tstg |
± 65 to +150 |
°C |
Operating Junction Temperature |
TJ |
+150 |
°C |
Representative Schematic Diagram
Input
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100 |
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100 |
10 k |
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100 |
500 |
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240 |
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200 |
0.3 |
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3.3 k |
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Output |
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6.0 k |
2.0 k |
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0.25 k |
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2.7 k |
1.4 k |
28 k |
30 pF |
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5.0 k |
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500 |
6.0 k |
1.0 k |
5.0 k |
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Gnd |
This device contains 19 active transistors.
MCT7800 |
MOTOROLA |
2
MCT7800
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
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MCT7805B |
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MCT7805C |
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Characteristics |
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Symbol |
Min |
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Typ |
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Max |
Min |
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Typ |
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Max |
Unit |
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Output Voltage (TJ = +25°C) |
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VO |
4.8 |
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5.0 |
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5.2 |
4.8 |
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5.0 |
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5.2 |
Vdc |
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Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) |
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VO |
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Vdc |
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7.0 |
Vdc ≤ Vin ≤ 20 Vdc |
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Ð |
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Ð |
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Ð |
4.75 |
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5.0 |
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5.25 |
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8.0 |
Vdc ≤ Vin ≤ 20 Vdc |
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4.75 |
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5.0 |
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5.25 |
Ð |
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Ð |
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Ð |
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Line Regulation, TJ = +25°C (Note 2) |
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Regline |
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mV |
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7.0 |
Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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7.0 |
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100 |
Ð |
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7.0 |
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100 |
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8.0 |
Vdc ≤ Vin ≤ 12 Vdc |
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Ð |
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2.0 |
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50 |
Ð |
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2.0 |
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50 |
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Load Regulation, TJ = +25°C (Note 2) |
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Regload |
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mV |
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5.0 mA ≤ Vin ≤ 1.5 A |
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Ð |
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2.0 |
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100 |
Ð |
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2.0 |
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100 |
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250 mA ≤ Vin ≤ 750 mA |
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Ð |
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1.5 |
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50 |
Ð |
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1.5 |
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50 |
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Quiescent Current (TJ = +25°C) |
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IB |
Ð |
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5.5 |
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8.0 |
Ð |
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5.5 |
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8.0 |
mA |
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Quiescent Current Change |
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IB |
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mA |
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7.0 |
Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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Ð |
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Ð |
Ð |
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Ð |
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1.3 |
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8.0 |
Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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Ð |
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1.3 |
Ð |
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Ð |
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Ð |
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5.0 mA ≤ IO ≤ 1.0 A |
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Ð |
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Ð |
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0.5 |
Ð |
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Ð |
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0.5 |
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Ripple Rejection |
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RR |
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dB |
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8.0 |
Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz |
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Ð |
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65 |
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Ð |
Ð |
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65 |
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Ð |
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Dropout Voltage (IO = 1.0 A, TJ = +25°C) |
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VI ± VO |
Ð |
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2.0 |
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Ð |
Ð |
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2.0 |
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Ð |
Vdc |
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Output Noise Voltage (TA = +25°C) |
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Vn |
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μV/VO |
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10 Hz ≤ f ≤ 100 kHz |
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Ð |
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10 |
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Ð |
Ð |
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10 |
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Ð |
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Output Resistance f = 1.0 kHz |
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rO |
Ð |
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1.3 |
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Ð |
Ð |
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1.3 |
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Ð |
mΩ |
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Short Circuit Current Limit (TA = +25°C) |
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ISC |
Ð |
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0.2 |
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Ð |
Ð |
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0.2 |
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Ð |
A |
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Vin = 35 Vdc |
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Peak Output Current (TJ = +25°C) |
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Imax |
Ð |
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2.2 |
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Ð |
Ð |
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2.2 |
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Ð |
A |
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Average Temperature Coefficient of Output Voltage |
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TCVO |
Ð |
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0.5 |
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Ð |
Ð |
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0.5 |
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Ð |
mV/°C |
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ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) |
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MCT7806B |
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MCT7806C |
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Characteristics |
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Symbol |
Min |
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Typ |
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Max |
Min |
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Typ |
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Max |
Unit |
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Output Voltage (TJ = +25°C) |
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VO |
5.75 |
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6.0 |
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6.25 |
5.75 |
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6.0 |
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6.25 |
Vdc |
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Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) |
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VO |
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Vdc |
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8.0 |
Vdc ≤ Vin ≤ 21 Vdc |
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Ð |
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Ð |
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Ð |
5.7 |
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6.0 |
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6.3 |
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9.0 |
Vdc ≤ Vin ≤ 21 Vdc |
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5.7 |
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6.0 |
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6.3 |
Ð |
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Ð |
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Ð |
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Line Regulation, TJ = +25°C (Note 2) |
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Regline |
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mV |
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8.0 |
Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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7.0 |
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120 |
Ð |
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7.0 |
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120 |
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9.0 |
Vdc ≤ Vin ≤ 13 Vdc |
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Ð |
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2.0 |
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60 |
Ð |
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2.0 |
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60 |
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Load Regulation, TJ = +25°C (Note 2) |
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Regload |
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mV |
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5.0 mA ≤ Vin ≤ 1.5 A |
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Ð |
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2.0 |
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120 |
Ð |
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2.0 |
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120 |
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250 mA ≤ Vin ≤ 750 mA |
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Ð |
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1.5 |
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60 |
Ð |
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1.5 |
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60 |
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Quiescent Current (TJ = +25°C) |
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IB |
Ð |
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5.5 |
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8.0 |
Ð |
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5.5 |
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8.0 |
mA |
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Quiescent Current Change |
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IB |
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mA |
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8.0 |
Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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Ð |
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Ð |
Ð |
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Ð |
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1.3 |
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9.0 |
Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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Ð |
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1.3 |
Ð |
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Ð |
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Ð |
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5.0 mA ≤ IO ≤ 1.0 A |
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Ð |
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Ð |
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0.5 |
Ð |
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Ð |
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0.5 |
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Ripple Rejection |
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RR |
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dB |
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9.0 |
Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz |
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Ð |
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65 |
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Ð |
Ð |
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65 |
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Ð |
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NOTES: |
1. Tlow = 0°C for MCT78XXC |
Thigh = |
+125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting |
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= ± 40°C for MCT78XXB |
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will reduce the output current to less than 1.0 A at a VI±VO of 15 V or |
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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 |
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3
MCT7800
ELECTRICAL CHARACTERISTICS (continued) (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
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MCT7806B |
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MCT7806C |
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Characteristics |
Symbol |
Min |
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Typ |
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Max |
Min |
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Typ |
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Max |
Unit |
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Dropout Voltage (IO = 1.0 A, TJ = +25°C) |
VI ± VO |
Ð |
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2.0 |
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Ð |
Ð |
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2.0 |
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Ð |
Vdc |
Output Noise Voltage (TA = +25°C) |
Vn |
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μV/VO |
10 Hz ≤ f ≤ 100 kHz |
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Ð |
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10 |
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Ð |
Ð |
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10 |
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Ð |
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Output Resistance f = 1.0 kHz |
rO |
Ð |
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1.3 |
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Ð |
Ð |
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1.3 |
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Ð |
mΩ |
Short Circuit Current Limit (TA = +25°C) |
ISC |
Ð |
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0.2 |
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Ð |
Ð |
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0.2 |
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Ð |
A |
Vin = 35 Vdc |
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Peak Output Current (TJ = +25°C) |
Imax |
Ð |
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2.2 |
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Ð |
Ð |
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2.2 |
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Ð |
A |
Average Temperature Coefficient of Output Voltage |
TCVO |
Ð |
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± 0.8 |
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Ð |
Ð |
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± 0.8 |
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Ð |
mV/°C |
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.) |
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MCT7808B |
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MCT7808C |
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Characteristics |
Symbol |
Min |
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Typ |
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Max |
Min |
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Typ |
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Max |
Unit |
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Output Voltage (TJ = +25°C) |
VO |
7.7 |
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8.0 |
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8.3 |
7.7 |
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8.0 |
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8.3 |
Vdc |
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W) |
VO |
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Vdc |
10.5 Vdc ≤ Vin ≤ 23 Vdc |
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Ð |
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Ð |
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Ð |
7.6 |
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8.0 |
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8.4 |
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11.5 Vdc ≤ Vin ≤ 23 Vdc |
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7.6 |
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8.0 |
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8.4 |
Ð |
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Ð |
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Ð |
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Line Regulation, TJ = +25°C (Note 2) |
Regline |
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mV |
10.5 Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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7.0 |
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160 |
Ð |
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7.0 |
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160 |
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11 Vdc ≤ Vin ≤ 17 Vdc |
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Ð |
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2.0 |
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80 |
Ð |
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2.0 |
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80 |
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Load Regulation, TJ = +25°C (Note 2) |
Regload |
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mV |
5.0 mA ≤ IO ≤ 1.5 A |
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Ð |
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2.0 |
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160 |
Ð |
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2.0 |
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160 |
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250 mA ≤ IO ≤ 750 mA |
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Ð |
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1.5 |
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80 |
Ð |
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1.5 |
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80 |
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Quiescent Current (TJ = +25°C) |
IB |
Ð |
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5.5 |
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8.0 |
Ð |
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5.5 |
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8.0 |
mA |
Quiescent Current Change |
IB |
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mA |
10.5 Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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Ð |
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Ð |
Ð |
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Ð |
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1.0 |
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11.5 Vdc ≤ Vin ≤ 25 Vdc |
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Ð |
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Ð |
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1.0 |
Ð |
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Ð |
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Ð |
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5.0 mA ≤ IO ≤ 1.0 A |
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Ð |
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Ð |
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0.5 |
Ð |
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Ð |
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0.5 |
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Ripple Rejection |
RR |
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dB |
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz |
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Ð |
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63 |
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Ð |
Ð |
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63 |
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Ð |
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Dropout Voltage (IO = 1.0 A, TJ = +25°C) |
VI ± VO |
Ð |
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2.0 |
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Ð |
Ð |
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2.0 |
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Ð |
Vdc |
Output Noise Voltage (TA = +25°C) |
Vn |
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μV/VO |
10 Hz ≤ f ≤ 100 kHz |
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Ð |
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10 |
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Ð |
Ð |
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10 |
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Ð |
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Output Resistance f = 1.0 kHz |
rO |
Ð |
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18 |
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Ð |
Ð |
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18 |
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Ð |
mΩ |
Short Circuit Current Limit (TA = +25°C) |
ISC |
Ð |
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0.2 |
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Ð |
Ð |
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0.2 |
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Ð |
A |
Vin = 35 Vdc |
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Peak Output Current (TJ = +25°C) |
Imax |
Ð |
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2.2 |
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Ð |
Ð |
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2.2 |
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Ð |
A |
Average Temperature Coefficient of Output Voltage |
TCVO |
Ð |
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± 0.8 |
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Ð |
Ð |
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± 0.8 |
|
Ð |
mV/°C |
NOTES: 1. Tlow = |
0°C for MCT78XXC |
Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting |
= |
± 40°C for MCT78XXB |
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 |
MOTOROLA |
4
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