MC78TXX

2

Absolute Maximum Ratings

Note:

1. Thermal resistance test board

Size: 76.2mm * 114.3mm * 1.6mm(1S0P)

JEDEC standard: JESD51-3, JESD51-7

2. Assume no ambient airflow.

Electrical Characteristics(MC78T05)

Note:

≤ Pmax, Pmax = 25W

4. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into

account separately. Pulse testing with low duty is used.

Parameter

Symbol

Value

Unit

35

40

V

V

Power Dissipation

PD

Internally limited

Thermal Resistance, Junction to Air (Note1, 2)

Ta = +25

°C

R

θJA

65

°C/W

Thermal Resistance, Junction to Case (Note1)

Tc = +25

°C

R

θJC

2.5

°C/W

Operating Junction Temperature Range

0 ~ +125

°C

Storage Temperature Range

-65 ~ +150

°C

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage

Vo

5mA

7.3V

≤≤≤≤ VI ≤≤≤≤ 20V, 5mA ≤≤≤≤ Io ≤≤≤≤ 2.0A

4.8

4.75

5.0

5.0

5.2

5.25

V

Line Regulation (Note4)

7.2V

7.2V

7.5V

8.0V

-3.0

25

mV

Load Regulation (Note4)

5mA

5mA

≤ Io ≤ 3.0A

-

10

15

30

80

mV

mV

Thermal Regulation

Pulse =10ms, P = 20W

°C

-

0.002

0.03

%Vo/W

Quiescent Current

5mA

5mA

≤ Io ≤ 3.0A

-

3.5

4.0

5.0

6.0

mA

mA

Quiescent Current Change

7.2V

≤ VI ≤ 35V, Io = 5mA

°C ;

7.5V

≤ VI ≤ 20V, Io =2.0A ;

5mA

-0.1

0.8

mA

Ripple Rejection

RR

f = 120Hz, 8V

°C

-75

-

dB

Dropout Voltage

°C-

2.2

2.5

V

Output Noise Voltage

°C, 10Hz ≤ f ≤ 100kHz

-

10

-

µV/Vo

Peak Output Current

°C-

5.0

-

A

Output Resistance

Ro

f = 1.0kHz

-

2.0

-

m

Ω

Short Circuit Current Limit

Isc

°C-

1.5

2.5

A

Average Temperature

Coefficient of Output Voltage

-

0.2

-

mV/

°C