Regulador de Voltaje 78xx

www.fairchildsemi.com

MC78XX/LM78XX/MC78XXA

3-Terminal 1A Positive Voltage Regulator
Features

Description

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The MC78XX/LM78XX/MC78XXA series of three
terminal positive regulators are available in the
TO-220/D-PAK package and with several fixed output
voltages, making them useful in a wide range of
applications. Each type employs internal current limiting,
thermalshut down and safe operating area protection,
making it essentially indestructible. If adequate heat sinking
is provided, they can deliver over 1A output current.
Although designed primarily as fixed voltage regulators,
these devices can be used with external components to
obtain adjustable voltages and currents.

Output Current up to 1A
Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24VThermal Overload Protection
Short Circuit Protection
Output Transistor Safe Operating Area Protection

TO-220

1
D-PAK

1
1. Input 2. GND 3. Output

Internal Block Digram

Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation

MC78XX/LM78XX/MC78XXA

Absolute Maximum Ratings
Parameter

Symbol

Value

Unit

VI
VI

35
40

V
V

RθJC

5

Input Voltage (for VO =5V to 18V)
(for VO = 24V)
Thermal Resistance Junction-Cases (TO-220)

o

C/W

oC/W

Thermal Resistance Junction-Air (TO-220)

RθJA

65

Operating Temperature Range

TOPR

0 ~ +125

o

-65 ~ +150

o

Storage Temperature Range

TSTG

C
C

Electrical Characteristics (MC7805/LM7805)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI = 10V, CI= 0.33µF, CO=0.1µF, unless otherwise specified)
Parameter

Symbol

Conditions

MC7805/LM7805

VO

Typ.

Max.

TJ =+25 oC
Output Voltage

Min.
4.8

5.0

5.2

5.0mA ≤ Io ≤ 1.0A, PO ≤ 15W
VI = 7V to 20V

4.75

5.0

5.25

Unit

VO = 7V to 25V

-

4.0

100

VI = 8V to 12V

-

1.6

50

IO = 5.0mA to1.5A

-

9

100

IO =250mA to
750mA

-

4

50

VLine Regulation (Note1)

Regline

TJ=+25 oC

Load Regulation (Note1)

Regload

TJ=+25 oC

IQ

TJ =+25 oC

-

5.0

8.0

IO = 5mA to 1.0A

-

0.03

0.5

VI= 7V to 25V

-

0.3

1.3

IO= 5mA

-

-0.8

-

mV/ oC

-

42

-

µV/Vo

62

73

-

dB

IO = 1A, TJ =+25 oC

-

2

-

V

f = 1KHz

-

15

-

mΩ

-

230

-

mA-

2.2

-

A

Quiescent Current
Quiescent Current Change
Output Voltage Drift

∆IQ
∆VO/∆T

Output Noise Voltage

VN

f = 10Hz to 100KHz, TA=+25 oC

Ripple Rejection

RR

f = 120Hz
VO = 8V to 18V

Dropout Voltage

VDrop

Output Resistance
Short Circuit Current
Peak Current

rO
ISC

VI = 35V, TA =+25

IPK

o

TJ =+25 C

oC

mV

mV
mA
mA

Note:1. 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.

2

MC78XX/LM78XX/MC78XXA

Electrical Characteristics (MC7806)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =11V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified)
Parameter

SymbolConditions

MC7806

VO

Typ.

Max.

TJ =+25 oC
Output Voltage

Min.
5.75

6.0

6.25

5.0mA ≤ IO ≤ 1.0A, PO ≤ 15W
VI = 8.0V to 21V

5.7

6.0

6.3

VI = 8V to 25V

-

5

120

VI = 9V to 13V

-

1.5

60

IO =5mA to 1.5A

-

9

120

IO =250mA to750A

-

3

60

Unit

V

Line Regulation (Note1)

Regline

TJ =+25 oC

Load Regulation(Note1)

Regload

TJ =+25 oC

IQ

TJ =+25 oC

-

5.0

8.0

IO = 5mA to 1A

-

-

0.5

VI = 8V to 25V

-

-

1.3

IO = 5mA

-

-0.8

-

mV/ oC

VN

f = 10Hz to 100KHz, TA =+25 oC

-

45

-

µV/Vo

Ripple Rejection

RR

f = 120Hz
VI = 9V to 19V

59

75

-

dB

Dropout Voltage

VDrop

IO = 1A, TJ =+25 oC

-

2

-

V...