APL1565A Ver la hoja de datos (PDF) - Anpec Electronics

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APL1565A

1A Low Dropout, Fast Response Fixed Voltage Regulator

Anpec Electronics 

APL1565A

Application Information (Cont.)

Operating Region and Power Dissi-

pation

The thermal resistance of the case to circuit board,

and the rate of air flow all control the APL1565A’s

maximum power dissipation. The power dissipation

across the device is PD = IOUT (VIN-VOUT) and the maxi-

mum power dissipation is:

PDMAX = (TJ-TA) / (? JC + ? CA)

where T -T is the temperature difference between

JA

the junction and ambient air, ? JC is the thermal re-

sistance of the package, and ? CA is the thermal re-

sistance through the printed circuit board, copper

traces, and other materials to the ambient air.

The GND pin of the APL1565A provide an electrical

connection to ground and channeling heat away. If

power dissipation is large, connect the GND pin to

ground using a large pad or ground plane, can im-

prove the problem of over heat of IC.

Copyright  ANPEC Electronics Corp.

5

Rev. A.3 - Oct., 2002

www.anpec.com.tw

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