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 http://onsemi.com
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 of TO−220−3
1.0 A. Although designed primarily as a fixed voltage regulator, these T SUFFIX
devices can be used with external components to obtain adjustable CASE 221A
voltages and currents. Heatsink surface
• Output Current in Excess of 1.0 A 1
2
connected to Pin 2.
• No External Components Required 3
• Internal Thermal Overload Protection Pin 1. Input D2PAK−3
• Internal Short Circuit Current Limiting 2. Ground D2T SUFFIX
CASE 936
• Output Transistor Safe−Area Compensation 1 3. Output
3
• Output Voltage Offered in 2% and 4% Tolerance Heatsink surface (shown as terminal 4 in
• Available in Surface Mount D2PAK−3, DPAK−3 and Standard case outline drawing) is connected to Pin 2.
3−Lead Transistor Packages 4
• NCV Prefix for Automotive and Other Applications Requiring Site
DPAK−3
DT SUFFIX
and Control Changes 1 2 CASE 369C
• Pb−Free Packages are Available 3
STANDARD APPLICATION
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted)
Value Unit Input MC78XX Output
Rating Symbol 369C 221A 936 Cin* CO**
Input Voltage (5.0 − 18 V) VI 35 Vdc 0.33 F
(24 V) 40
Power Dissipation PD Internally Limited W A common ground is required between the
Thermal Resistance, RJA 92 65 Figure °C/W input and the output voltages. The input voltage
Junction−to−Ambient 14 must remain typically 2.0 V above the output
voltage even during the low point on the input
Thermal Resistance, RJC 5.0 5.0 5.0 °C/W ripple voltage.
Junction−to−Case
XX, These two digits of the type number
Storage Junction Temperature Tstg −65 to +150 °C indicate nominal voltage.
Range * Cin is required if regulator is located an
Operating Junction Temperature TJ +150 °C appreciable distance from power supply
filter.
Maximum ratings are those values beyond which device damage can occur.
** CO is not needed for stability; however,
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are it does improve transient response. Values
exceeded, device functional operation is not implied, damage may occur and of less than 0.1 F could cause instability.
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. ORDERING INFORMATION
Machine Model Method 200 V. See detailed ordering and shipping 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 Publication Order Number:
April, 2005 − Rev. 14 MC7800/D
MC7800, MC7800A, NCV7805
Vin
MC7800 R24
50 D2
Zener
LAT LAT 3 A
Q17 Q18 R19
27.5 k
Q19
QNPN Q20
QNPN
C3 1.0 P
R14
1.0 k
Q10
QNPN
R15
R18 R21 680 R23
100 k R22 600 0.2
100
Vout
Q7 5.01
QNPN Q5
QNPN 2 R30
R17 Q12 18 k
9.0 k Q9 QNPN Sense
QNPN 2 R12 R29
Q6 R11 3.0 k 9.0 k
D1 15 k Q15
Zener QNPN
QNPN R25 R28
R1
10.66 k 6.0 k 9.0 k
R16 R10
R20 3340−(3316ACT)
600 R26 R27
17500
Q8
3.0 k 9.0 k
QNPN
R2
1.56 k
R9
R5 3.0 k R13
4.5 k SUB 11660
Q14 Q11 2
QNPN Q1 C1
C2 N+ 30 P
3.0 P QNPN 6
Q4
QNPN
Q13 Q3
QNPN QNPN
Q2 Q16
R6 QNPN 4
1.0 k Diode
R7 R3 R8
14 k 1.8 k 5.0 k
This device contains 22 active transistors.
Figure 1. Representative Schematic Diagram
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2
MC7800, MC7800A, NCV7805
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 1.0 A, TJ = Tlow to Thigh (Note 22), unless otherwise noted)
MC7815AB/MC7815AC
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO 14.7 15 15.3 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W) VO 14.4 15 15.6 Vdc
17.9 Vdc ≤ Vin ≤ 30 Vdc
Line Regulation (Note 23) Regline mV
17.9 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA − 8.5 20
20 Vdc ≤ Vin ≤ 26 Vdc − 3.0 22
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C − 7.0 20
Load Regulation (Note 23) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C − 1.8 25
5.0 mA ≤ IO ≤ 1.0 A − 1.5 25
250 mA ≤ IO ≤ 750 mA − 1.2 15
Quiescent Current IB − 3.5 6.0 mA
Quiescent Current Change IB mA
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA − − 0.8
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C − − 0.8
5.0 mA ≤ IO ≤ 1.0 A − − 0.5
Ripple Rejection RR 60 80 − dB
18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI − VO − 2.0 − Vdc
Output Noise Voltage (TA = 25°C) Vn − 10 − V/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO − 1.2 − m
Short Circuit Current Limit (TA = 25°C) ISC − 0.2 − A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax − 2.2 − A
Average Temperature Coefficient of Output Voltage TCVO − −1.0 − mV/°C
22. Tlow = 0°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, C, NCV7805
= 40°C for MC78XXB, MC78XXAB, NCV7805
23. Load and line 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.
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