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PDF MC78T12CT Data sheet ( Hoja de datos )
| Número de pieza | MC78T12CT | |
| Descripción | THREE-AMPERE POSITIVE FIXED VOLTAGE REGULATORS | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Order this document by MC78T00/D
Three-Ampere Positive
Voltage Regulators
This family of fixed voltage regulators are monolithic integrated circuits
capable of driving loads in excess of 3.0 A. These three–terminal regulators
employ internal current limiting, thermal shutdown, and safe–area
compensation. Devices are available with improved specifications, including
a 2% output voltage tolerance, on AC–suffix 5.0, 12 and 15 V device types.
Although designed primarily as a fixed voltage regulator, these devices
can be used with external components to obtain adjustable voltages and
currents. This series of devices can be used with a series–pass transistor to
supply up to 15 A at the nominal output voltage.
• Output Current in Excess of 3.0 A
• Power Dissipation: 25 W
• No External Components Required
• Output Voltage Offered in 2% and 4% Tolerance*
• Thermal Regulation is Specified
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Symbol
Value
Unit
Input Voltage (5.0 V – 12 V)
Input Voltage (15 V)
VI 35 Vdc
40
Power Dissipation and Thermal Characteristics
Plastic Package (Note 1)
TA = +25°C
Thermal Resistance, Junction–to–Air
TC = +25°C
Thermal Resistance, Junction–to–Case
Storage Junction Temperature
Operating Junction Temperature Range
(MC78T00C, AC)
PD
RθJA
PD
RθJC
Tstg
TJ
Internally Limited
65 °C/W
Internally Limited
2.5 °C/W
+150
°C
0 to +125
°C
NOTES: 1. Although power dissipation is internally limited, specifications apply only
for PO ≤ Pmax, Pmax = 25 W.
MC78T00
Series
THREE–AMPERE
POSITIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Pin 1. Input
2. Ground
3. Output
1
2
3
Heatsink surface is connected to Pin 2.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC78T05
MC78T08
5.0 V
8.0 V
MC78T12
MC78T15
12 V
15 V
ORDERING INFORMATION
Simplified Application
Input
Cin*
0.33µF
MC78TXX
Output
CO**
A common ground is required between the input and the output voltages. The input voltage must
remain typically 2.2 V above the output voltage even during the low point on the input ripple voltage.
XX these two digits of the type number indicate voltage.
** Cin is required if regulator is located an appreciable distance from power supply filter.
** (See Applications Information for details.)
** CO is not needed for stability; however, it does improve transient response.
MOTOROLA ANALOG IC DEVICE DATA
Device
Operating
VO Temperature
Tol. Range Package
MC78TXXCT
4%
MC78TXXACT 2%*
TJ = 0° to
+125°C
Plastic
Power
MC78TXXBT# 4%
MC78TXXABT# 2%*
TJ = – 40° to Plastic
+125°C
Power
XX Indicates nominal voltage.
* 2% regulators available in 5, 12 and 15 V devices.
# Automotive temperature range selections are avail-
able with special test conditions and additional
tests. Contact your local Motorola sales office for
information.
© Motorola, Inc. 1996
Rev 1
1
1 page  
MC78T00 Series
ELECTRICAL CHARACTERISTICS (Vin = 20 V, IO = 3.0 A, 0°C ≤ TJ ≤ 125°C, PO ≤ Pmax [Note 1], unless otherwise noted.)
MC78T15AC
MC78T15C
Characteristics
Symbol
Min
Typ
Max
Min
Typ
Max Unit
Output Voltage
(5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C)
(5.0 mA ≤ IO ≤ 3.0 A;
5.0 mA ≤ IO ≤ 2.0 A, 17.5 Vdc ≤ Vin ≤ 30 Vdc)
VO Vdc
14.7 15 15.3 14.4 15 15.6
14.4 15 15.6 14.25 15 15.75
Line Regulation (Note 2)
Regline
–
7.5 55
–
7.5 55 mV
(17.6 Vdc ≤ Vin ≤ 40 Vdc, IO = 5.0 mA, TJ = +25°C;
17.6 Vdc ≤ Vin ≤ 40 Vdc, IO = 1.0 A, TJ = +25°C;
20 Vdc ≤ Vin ≤ 26 Vdc, IO = 3.0 A, TJ = +25°C;
18 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A)
Load Regulation (Note 2)
(5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C)
(5.0 mA ≤ IO ≤ 3.0 A)
Regload
mV
– 10 30 – 10 30
– 15 80 – 15 80
Thermal Regulation
(Pulse = 10 ms, P = 20 W, TA = +25°C)
Regtherm – 0.001 0.01
– 0.002 0.03 %VO/W
Quiescent Current
(5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C)
(5.0 mA ≤ IO ≤ 3.0 A)
IB mA
– 3.5 5.0 – 3.5 5.0
– 4.0 6.0 – 4.0 6.0
Quiescent Current Change
(17.6 Vdc ≤ Vin ≤ 40 Vdc, IO = 5.0 mA, TJ = +25°C;
5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C;
18 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A)
∆IB
– 0.3 1.0 – 0.3 1.0 mA
Ripple Rejection
(18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz,
IO = 2.0 A, TJ = 25°C)
RR 55 65 – 55 65 – dB
Dropout Voltage (IO = 3.0 A, TJ = +25°C)
Vin–VO
–
2.2 2.5
–
2.2 2.5 Vdc
Output Noise Voltage
(10 Hz ≤ f ≤ 100 kHz, TJ = +25°C)
Vn
– 10 –
– 10 – µV/VO
Output Resistance (f = 1.0 kHz)
Short Circuit Current Limit
(Vin = 40 Vdc, TJ = +25°C)
RO
– 2.0 –
– 20 – mΩ
ISC
– 1.0 –
– 1.0 –
A
Peak Output Current (TJ = +25°C)
Imax
– 5.0 –
Average Temperature Coefficient of Output Voltage TCVO – 0.6 –
(IO = 5.0 mA)
– 5.0 –
A
– 0.6 – mV/°C
NOTES: 1. Although power dissipation is internally limited, specifications apply only for PO ≤ Pmax, Pmax = 25 W.
2. Line and load 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 ANALOG IC DEVICE DATA
5
5 Page 
MC78T00 Series
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 which may be provided in Motorola
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. 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.
MOTOROLA ANALOG IC DEVICE DATA
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MC78T12CT.PDF ] | |
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