LM7812A datasheet(2/28 Pages) FAIRCHILD | 3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS

2 page

LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)

ABSOLUTE MAXIMUM RATINGS (T

A = +25

°C, unless otherwise specified)

LM7805/I/R/RI ELECTRICAL CHARACTERISTICS

(Refer to test circuit, TMIN < TJ < TMAX, IO = 500mA, VI = 10V, CI= 0.33

µF, C

O= 0.1

µF, unless otherwise specified)

* TMIN <TJ <TMAX

LM78XXI/RI: TMIN= - 40

°C, T

MAX = +125

°C

LM78XX/R: TMIN= 0

°C, T

MAX= +125

°C

* 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.

Characteristic

Symbol

Value

Unit

Input Voltage (for VO = 5V to 18V)

(for VO = 24V)

Thermal Resistance Junction-Cases

RθJC

°C/W

Thermal Resistance Junction-Air

RθJA

°C/W

Operating Temperature Range KA78XX/A/R/RA

KA78XXI/RI

TOPR

0 ~ +125

-40 ~ +125

°C

Storage Temperature Range

TSTG

-65 ~ +150

°C

LM7805I

LM7805

Min Typ Max Min Typ Max

TJ =+25

°C

4.8

5.0

5.2

4.8

5.0

5.2

Output Voltage

5.0mA

≤ I

≤1.0A, P

≤ 15W

VI = 7V to 20V

VI = 8V to 20V

4.75

5.0

5.25

4.75

5.0

5.25

VO = 7V to 25V

4.0

100

4.0

100

VI = 8V to 12V

1.6

IO = 5.0mA to1.5A

100

IO =250mA to 750mA

Quiescent Current

TJ =+25

°C

5.0

IO = 5mA to 1.0A

0.03

0.5

0.03

0.5

Quiescent Current Change

∆I

VI= 7V to 25V

0.3

1.3

VI= 8V to 25V

0.3

1.3

Output Voltage Drift

∆V

∆T IO= 5mA

-0.8

mV/

°C

Output Noise Voltage

f = 10Hz to 100Khz, TA=+25

°C

µV/Vo

Ripple

Rejection

f = 120Hz

VO = 8 to 18V

Dropout Voltage

IO = 1A, TJ =+25

°C

Output Resistance

f = 1KHz

Ω

Short Circuit Current

ISC

VI = 35V, TA =+25

°C

230

Peak Current

IPK

TJ =+25

°C

2.2

Characteristic

Symbol

Test Conditions

Unit

Line Regulation

∆V

Load Regulation

TJ=+25

°C

TJ=+25

°C

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