MC7900 데이터 시트보기 (PDF) - ON Semiconductor

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MC7900

1.0 A Negative Voltage Regulators

ON Semiconductor 

MC7900 Series

80

3.5

PD(max) for TA = +50°C

70

Free Air

Mounted

60

Vertically

50

Minimum

Size Pad

40

RqJA

3.0

2.0 oz. Copper 2.5

L

ÎÎÎÎÎÎ 2.0

L

ÎÎÎÎÎÎ 1.5

30

1.0

0

5.0

10

15

20

25

30

L, LENGTH OF COPPER (mm)

Figure 11. D2PAK Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

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.

Input Bias 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.

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