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Fairchild Semiconductor
Fairchild Semiconductor

7805 Datasheet

3-Terminal 1A Positive Voltage Regulator


7805 Datasheet Preview


September 2014
LM78XX / LM78XXA
3-Terminal 1 A Positive Voltage Regulator
Features
• Output Current up to 1 A
• Output Voltages: 5, 6, 8, 9, 10, 12, 15, 18, 24 V
• Thermal Overload Protection
• Short-Circuit Protection
• Output Transistor Safe Operating Area Protection
Description
The LM78XX series of three-terminal positive regulators
is available in the TO-220 package and with several fixed
output voltages, making them useful in a wide range of
applications. Each type employs internal current limiting,
thermal shut-down, and safe operating area protection. If
adequate heat sinking is provided, they can deliver over
1 A output current. Although designed primarily as fixed-
voltage regulators, these devices can be used with exter-
nal components for adjustable voltages and currents.
TO-220 (Single Gauge)
GND
1. Input
1 2. GND
3. Output
Ordering Information(1)
Product Number
LM7805CT
LM7806CT
LM7808CT
LM7809CT
LM7810CT
LM7812CT
LM7815CT
LM7818CT
LM7824CT
LM7805ACT
LM7809ACT
LM7810ACT
LM7812ACT
LM7815ACT
Output Voltage
Tolerance
±4%
±2%
Package
TO-220
(Single Gauge)
Note:
1. Above output voltage tolerance is available at 25°C.
Operating
Temperature
Packing Method
-40°C to +125°C
Rail
0°C to +125°C
© 2006 Fairchild Semiconductor Corporation
LM78XX / LM78XXA Rev. 1.3.1
www.fairchildsemi.com
Page 1

Block Diagram
Input
1
Starting
Circuit
Current
Generator
Reference
Voltage
Series Pass
Element
SOA
Protection
Error
Amplifier
Thermal
Protection
Figure 1. Block Diagram
Output
3
GND
2
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted.
Symbol
Parameter
Value
Unit
VI
RθJC
RθJA
TOPR
Input Voltage
VO = 5 V to 18 V
VO = 24 V
Thermal Resistance, Junction-Case (TO-220)
Thermal Resistance, Junction-Air (TO-220)
Operating Temperature Range
LM78xx
LM78xxA
35
40
5
65
-40 to +125
0 to +125
V
°C/W
°C/W
°C
TSTG
Storage Temperature Range
- 65 to +150
°C
© 2006 Fairchild Semiconductor Corporation
LM78XX / LM78XXA Rev. 1.3.1
2
www.fairchildsemi.com
Page 2

Electrical Characteristics (LM7805)
Refer to the test circuit, -40°C < TJ < 125°C, IO = 500 mA, VI = 10 V, CI = 0.1 μF, unless otherwise specified.
Symbol
Parameter
VO Output Voltage
Regline Line Regulation(2)
Regload Load Regulation(2)
IQ
ΔIQ
ΔVO/ΔT
VN
RR
VDROP
RO
ISC
IPK
Quiescent Current
Quiescent Current
Change
Output Voltage Drift(3)
Output Noise Voltage
Ripple Rejection(3)
Dropout Voltage
Output Resistance(3)
Short-Circuit Current
Peak Current(3)
Conditions
TJ = +25°C
IO = 5 mA to 1 A, PO 15 W,
VI = 7 V to 20 V
TJ = +25°C
VI = 7 V to 25 V
VI = 8 V to 12 V
TJ = +25°C
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
TJ = +25°C
IO = 5 mA to 1 A
VI = 7 V to 25 V
IO = 5 mA
f = 10 Hz to 100 kHz, TA = +25°C
f = 120 Hz, VI = 8 V to 18 V
TJ = +25°C, IO = 1 A
f = 1 kHz
TJ = +25°C, VI = 35 V
TJ = +25°C
Min.
4.80
4.75
62
Typ.
5.00
5.00
4.0
1.6
9.0
4.0
5
0.03
0.30
-0.8
42
73
2
15
230
2.2
Max.
5.20
5.25
Unit
V
100.0
50.0
100.0
50.0
8
0.50
1.30
mV
mV
mA
mA
mV/°C
μV
dB
V
mΩ
mA
A
Notes:
2. 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 is used.
3. These parameters, although guaranteed, are not 100% tested in production.
© 2006 Fairchild Semiconductor Corporation
LM78XX / LM78XXA Rev. 1.3.1
3
www.fairchildsemi.com
Page 3
Part Number 7805
Manufactur Fairchild Semiconductor
Description 3-Terminal 1A Positive Voltage Regulator
Total Page 24 Pages
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