LM78T12CT

LM78T12CT Datasheet

LM78TXX

Part	Datasheet
LM78T12CT	LM78T12CT (pdf)

Related Parts	Information
LM78T15CT	LM78T15CT
LM78T05CT	LM78T05CT

PDF Datasheet Preview
LM78TXX 3-Terminal 3A Positive Voltage Regulator • Output Current in Excess of 3.0A • Output Transistor Safe Operating Area Compensation • Power Dissipation :25W • Internal Short Circuit Current Limiting • Internal Thermal Overload Protection • Output Voltage Offered in 4% Tolerance • No External Components Required • Output Voltage of 5,12 and 15V This family of fixed voltage regulators are monolithic integrated circuit capable of driving loads in excess of A. TO-220 1.Input GND Output Internal Block Diagram INPUT 1 STARTING CIRCUIT CURRENT GENERATOR REFERENCE VOLTAGE SERIES PASS ELEMENT SOA PROTECTION ERROR AMPLIFIER THERMAL PROTECTION OUTPUT 3 GND 2 2009 Fairchild Semiconductor Corporation LM78TXX Absolute Maximum Ratings Parameter Input Voltage for VO = 5V to 12V for VO = 15V Power Dissipation Thermal Resistance, Junction to Air Note1, 2 Ta = +25°C Thermal Resistance, Junction to Case Note1 Tc = +25°C Operating Junction Temperature Range Storage Temperature Range Note Thermal resistance test board Size 76.2mm * 114.3mm * 1.6mm 1S0P JEDEC standard JESD51-3, JESD51-7 Assume no ambient airflow. Symbol VI PD TSTG Value 35 40 Internally limited 0 ~ +125 -65 ~ +150 Unit V °C/W °C/W °C °C Electrical Characteristics LM78T05 VI = 10V, IO = A, 0°C TJ +125°C, Po PMAX Note3 , unless otherwise specified. Parameter Conditions Output Voltage 5mA Io 3.0A , TJ = +25°C 7.3V VI 20V, 5mA Io 2.0A Line Regulation Note4 7.2V VI 35V , Io=5mA, TJ =+25°C 7.2V VI 35V , Io=1.0A, TJ = +25°C 7.5V VI 20V, Io =2.0A, TJ = +25°C 8.0V VI 12V, Io =3.0A, TJ = +25°C Load Regulation Note4 5mA Io 3.0A , TJ = +25°C 5mA Io 3.0A Ordering Information Product Number LM78T05CT LM78T12CT LM78T15CT Package TO-220 Operating Temperature 0 ~ +125°C LM78TXX LM78TXX DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 7/6/09 0.0m 001 Stock#DS903490 2009 Fairchild Semiconductor Corporation

PDF Datasheet Preview

LM78TXX
3-Terminal 3A Positive Voltage Regulator
• Output Current in Excess of 3.0A
• Output Transistor Safe Operating Area Compensation
• Power Dissipation :25W
• Internal Short Circuit Current Limiting
• Internal Thermal Overload Protection
• Output Voltage Offered in 4% Tolerance
• No External Components Required
• Output Voltage of 5,12 and 15V

This family of fixed voltage regulators are monolithic integrated circuit capable of driving loads in excess of A.

TO-220
1.Input GND Output

Internal Block Diagram

INPUT 1

STARTING CIRCUIT

CURRENT GENERATOR

REFERENCE VOLTAGE

SERIES PASS ELEMENT

SOA PROTECTION

ERROR AMPLIFIER

THERMAL PROTECTION

OUTPUT 3

GND 2
2009 Fairchild Semiconductor Corporation

LM78TXX

Absolute Maximum Ratings

Parameter Input Voltage for VO = 5V to 12V for VO = 15V Power Dissipation Thermal Resistance, Junction to Air Note1, 2 Ta = +25°C Thermal Resistance, Junction to Case Note1 Tc = +25°C Operating Junction Temperature Range Storage Temperature Range

Note Thermal resistance test board

Size 76.2mm * 114.3mm * 1.6mm 1S0P JEDEC standard JESD51-3, JESD51-7 Assume no ambient airflow.

Symbol VI PD

TSTG

Value 35 40

Internally limited
0 ~ +125 -65 ~ +150

Unit V
°C/W
°C/W °C °C

Electrical Characteristics LM78T05

VI = 10V, IO = A, 0°C TJ +125°C, Po PMAX Note3 , unless otherwise specified.

Parameter

Conditions

Output Voltage
5mA Io 3.0A , TJ = +25°C 7.3V VI 20V, 5mA Io 2.0A

Line Regulation Note4
7.2V VI 35V , Io=5mA, TJ =+25°C 7.2V VI 35V , Io=1.0A, TJ = +25°C 7.5V VI 20V, Io =2.0A, TJ = +25°C 8.0V VI 12V, Io =3.0A, TJ = +25°C

Load Regulation Note4
5mA Io 3.0A , TJ = +25°C 5mA Io 3.0A
Ordering Information

Product Number LM78T05CT LM78T12CT LM78T15CT

Package TO-220

Operating Temperature 0 ~ +125°C

LM78TXX

LM78TXX

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.

A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
7/6/09 0.0m 001 Stock#DS903490 2009 Fairchild Semiconductor Corporation

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LM78T12CT Datasheet file may be downloaded here without warranties.

Datasheet ID: LM78T12CT 634300