Regulador De Voltaje

MC7800, MC7800A, NCV7805 1.0 A 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 of1.0 A. Although designed primarily as a fixed voltage regulator, 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 in 2% and 4% Tolerance• Available in Surface Mount D2PAK−3, DPAK−3 and Standard 3−Lead Transistor Packages • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes • Pb−Free Packages are Available
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted)
Value Rating Input Voltage Power Dissipation Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Storage JunctionTemperature Range Operating Junction Temperature (5.0 − 18 V) (24 V) Symbol VI PD RqJA RqJC Tstg TJ 369C 221A 35 40 Internally Limited 92 5.0 65 5.0 −65 to +150 +150 Figure 14 5.0 936 Vdc W °C/W °C/W °C °C Unit

http://onsemi.com

TO−220−3 T SUFFIX CASE 221A 1 Heatsink surface connected to Pin 2. 3 Pin 1. Input 2. Ground 3. Output D2PAK−3 D2T SUFFIX CASE 936

2

1

3 Heatsink surface(shown as terminal 4 in case outline drawing) is connected to Pin 2. 4 1 2 3 DPAK−3 DT SUFFIX CASE 369C

STANDARD APPLICATION
Input Cin* 0.33 mF MC78XX Output CO**

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 typenumber indicate nominal voltage. * Cin is required if regulator is located an appreciable distance from power supply filter. ** CO is not needed for stability; however, it does improve transient response. Values of less than 0.1 mF could cause instability.

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values(not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. *This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL_STD_883, Method 3015. Machine Model Method 200 V.

ORDERING INFORMATION
See detailed ordering andshipping information in the package dimensions section on page 22 of this data sheet.

DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 28 of this data sheet.

© Semiconductor Components Industries, LLC, 2005

1

April, 2005 − Rev. 14

Publication Order Number: MC7800/D

MC7800, MC7800A, NCV7805
Vin

MC7800
LAT Q17

R24 50 LAT 3A Q18 Q19 QNPN C3 Q10 QNPN 1.0 P

D2 Zener R19 27.5 k Q20 QNPN R14 1.0 k R15 680

R18 100 k

R22 100 Q7 QNPN R17 9.0 k

R21 600

R23 0.2 Vout 5.01 R30 18 k Sense

Q5 QNPN 2 Q9 QNPN 2 Q12 QNPN R11 15 k Q15 QNPN R20 17500 R16 600 R10 3340−(3316ACT) R12 3.0 k R25 6.0 k R26 3.0 k R29 9.0 k R28 9.0 k R27 9.0 k

D1 Zener R1 10.66 k Q8 QNPN R2 1.56 k

Q6 QNPN

R5 4.5 k Q14 QNPN Q1 C23.0 P N+ QNPN 6 Q13 QNPN R6 1.0 k R7 14 k Q4 QNPN C1 30 P

R9 3.0 k SUB Q11 2

R13 11660

Q2 Q16 QNPN 4 Diode R3 1.8 k R8 5.0 k

Q3 QNPN

This device contains 22 active transistors.

Figure 1. Representative Schematic Diagram

http://onsemi.com
2

MC7800, MC7800A, NCV7805
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh (Note 1), unless otherwise noted)...