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MC78T00

更新时间： 2024-11-25 22:22:23
品牌 Logo 应用领域
安森美 - ONSEMI 稳压器
页数 文件大小 规格书
12页 166K
描述
THREE-AMPERE POSITIVE FIXED VOLTAGE REGULATORS

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MC78T00 数据手册

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Order this document by MC78T00/D  
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.  
THREE–AMPERE  
POSITIVE FIXED  
VOLTAGE REGULATORS  
SEMICONDUCTOR  
TECHNICAL DATA  
• 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  
T SUFFIX  
PLASTIC PACKAGE  
CASE 221A  
Pin 1. Input  
2. Ground  
3. Output  
2
MAXIMUM RATINGS (T = +25°C, unless otherwise noted.)  
1
A
3
Rating  
Symbol  
Value  
Unit  
Input Voltage (5.0 V – 12 V)  
Input Voltage (15 V)  
V
I
35  
40  
Vdc  
Heatsink surface is connected to Pin 2.  
Power Dissipation and Thermal Characteristics  
Plastic Package (Note 1)  
T
= +25°C  
P
InternallyLimited  
A
D
Thermal Resistance, Junction–to–Air  
= +25°C  
R
P
R
65  
InternallyLimited  
2.5  
°C/W  
θJA  
D
T
C
Thermal Resistance, Junction–to–Case  
°C/W  
°C  
θJC  
Storage Junction Temperature  
T
stg  
+150  
Operating Junction Temperature Range  
(MC78T00C, AC)  
T
J
0 to +125  
°C  
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE  
MC78T05  
MC78T08  
5.0 V  
8.0 V  
MC78T12  
MC78T15  
12 V  
15 V  
NOTES: 1. Although power dissipation is internally limited, specifications apply only  
for P ≤ P , P = 25 W.  
O
max max  
ORDERING INFORMATION  
Operating  
Simplified Application  
V
Temperature  
Range  
O
Tol.  
Device  
Package  
MC78TXX  
Output  
Input  
T = 0° to  
+125°C  
Plastic  
Power  
MC78TXXCT  
MC78TXXACT  
4%  
2%*  
J
C
*
in  
0.33µF  
C **  
O
T = –40° to  
+125°C  
Plastic  
Power  
MC78TXXBT#  
MC78TXXABT# 2%*  
4%  
J
XX Indicates nominal voltage.  
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.  
* 2% regulators available in 5, 12 and 15 V devices.  
XX these two digits of the type number indicate voltage.  
# Automotive temperature range selections are avail-  
able with special test conditions and additional  
tests. Contact your local Motorola sales office for  
information.  
** C is required if regulator is located an appreciable distance from power supply filter.  
in  
** (See Applications Information for details.)  
** C is not needed for stability; however, it does improve transient response.  
O
Motorola, Inc. 1996  
Rev 1  
1234567...12

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