MC7808CD2T View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC7808CD2T

THREE–TERMINAL POSITIVE FIXED VOLTAGE REGULATORS

Motorola => Freescale 

MC7800, MC7800A, LM340, LM340A Series

Figure 11. Worst Case Power Dissipation versus

Ambient Temperature (Case 221A)

20

θJC = 5°C/W

16

θHS = 0°C/W

θJA = 65°C/W

TJ(max) = 150°C

12

θHS = 5°C/W

8.0

θHS = 15°C/W

4.0

0

–50 –25

No Heatsink

0 25 50 75 100 125 150

TA, AMBIENT TEMPERATURE (°C)

Figure 12. Input Output Differential as a Function

of Junction Temperature (MC78XXC, AC)

2.5

IO = 1.0 A

IO = 500 mA

2.0

IO = 200 mA

1.5 IO = 20 mA

1.0 IO = 0 mA

0.5

∆VO = 2% of VO

– – – Extended Curve for MC78XXB

0

–75 –50 –25 0 25 50 75 100 125

TJ, JUNCTION TEMPERATURE (°C)

Figure 13. D2PAK Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

80

3.5

70

Free Air

PD(max) for TA = 50°C

3.0

Mounted

60

50

40

Vertically

Minimum

Size Pad

RθJA

2.0 oz. Copper 2.5

L

ÎÎÎÎ 2.0

L

ÎÎÎÎÎÎÎÎÎÎÎÎ 1.5

30

1.0

0

5.0

10

15

20

25

30

L, LENGTH OF COPPER (mm)

DEFINITIONS

Line Regulation – The change in output voltage for a

change in the input voltage. The measurement is made under

conditions of low dissipation or by using pulse techniques such

that the average chip temperature is not significantly affected.

Load Regulation – The change in output voltage for a

change in load current at constant chip temperature.

Maximum Power Dissipation – The maximum total

device dissipation for which the regulator will operate within

specifications.

Quiescent Current – That part of the input current that is

not delivered to the load.

Output Noise Voltage – The rms ac voltage at the output,

with constant load and no input ripple, measured over a

specified frequency range.

Long Term Stability – Output voltage stability under

accelerated life test conditions with the maximum rated

voltage listed in the devices’ electrical characteristics and

maximum power dissipation.

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding

the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and

specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola

data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”

must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of

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applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury

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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that

Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal

Opportunity/Affirmative Action Employer.

MOTOROLA ANALOG IC DEVICE DATA

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