MC7800, MC7800A, LM340, LM340A Series

8

MOTOROLA ANALOG IC DEVICE DATA

MC7812C/LM340T–12

Characteristic

Symbol

Min

Typ

Max

Unit

Output Noise Voltage (TA = 25°C)

Vn

–

10

–

µV/VO

10 Hz

≤ f ≤ 100 kHz

Output Resistance f = 1.0 kHz

rO

–

1.1

–

m

Ω

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

–

–0.8

–

mV/

°C

MC7812AC/LM340AT–12

Characteristic

Symbol

Min

Typ

Max

Unit

Output Voltage (TJ = 25°C)

VO

11.75

12

12.25

Vdc

Output Voltage (5.0 mA

≤ IO ≤ 1.0 A, PD ≤ 15 W)

VO

11.5

12

12.5

Vdc

14.8 Vdc

≤ Vin ≤ 27 Vdc

Line Regulation (Note 2)

Regline

mV

14.8 Vdc

≤ Vin ≤ 30 Vdc, IO = 500 mA

–

3.8

18

16 Vdc

≤ Vin ≤ 22 Vdc, IO = 1.0 A

–

2.2

20

14.5 Vdc

≤ Vin ≤ 27 Vdc, TJ = 25°C

–

6.0

120

Load Regulation (Note 2)

Regload

mV

5.0 mA

≤ IO ≤ 1.5 A, TJ = 25°C

–

–

25

5.0 mA

≤ IO ≤ 1.0 A

–

–

25

Quiescent Current

IB

–

3.4

6.0

mA

Quiescent Current Change

∆IB

mA

15 Vdc

≤ Vin ≤ 30 Vdc, IO = 500 mA

–

–

0.8

14.8 Vdc

≤ Vin ≤ 27 Vdc, TJ = 25°C

–

–

0.8

5.0 mA

≤ IO ≤ 1.0 A, TJ = 25°C

–

–

0.5

Ripple Rejection

RR

55

60

–

dB

15 Vdc

≤ Vin ≤ 25 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

–

µV/VO

10 Hz

≤ f ≤ 100 kHz

Output Resistance (f = 1.0 kHz)

rO

–

1.1

–

m

Ω

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

–

–0.8

–

mV/

°C

NOTES: 1. Tlow = –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX

Thigh = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX

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 cycle is used.