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KA78TXX
3-Terminal 3A Positive Voltage Regulator
Features
• • • • • • • • Output current in exce...
www.fairchildsemi.com
KA78TXX
3-Terminal 3A Positive
Voltage Regulator
Features
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
Description
This family of fixed
voltage regulators are monolithic integrated circuit capable of driving loads in excess of 3.0 A.
TO-220
1
1.Input 2. GND 3. Output
Internal Block Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
KA78TXX
Absolute Maximum Ratings
Parameter Input
Voltage (for VO = 5V to 12V) (for VO = 15V) Power Dissipation Thermal Resistance, Junction to Air Tc = +25 °C Thermal Resistance ,Junction to Case Operating Junction Temperature Range Storage Temperature Range Symbol VI PD RθJA RθJC TJ TSTG Value 35 40 Internally limited 65 2.5 0 ~ +150 -65 ~ +150 Unit V V °C/W °C/W °C °C
Electrical Characteristics(KA78T05)
(VI = 10V, IO = 3.0 A, 0 °C ≤ TJ ≤ +125 °C, Po ≤ PMAX , unless otherwise specified.) Parameter Output
Voltage Symbol Vo Conditions 5mA ≤ Io ≤ 3.0A , TJ = +25 °C 7.3V ≤ VI ≤ 20V, 5mA ≤ Io ≤ 2.0A 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 8.0V ≤ VI ≤ 12V, Io =3.0A 5mA ≤ Io ≤ 3.0A , TJ = +25 °C 5mA ≤ Io ≤ 3.0A Pulse =10ms, P = 20W TA = +25 °C 5mA ≤ Io ≤ 3.0A , TJ = +25 °C 5mA ≤ Io ≤ 3.0A 7.2V ≤ VI ...