NCP605 데이터 시트보기 (PDF) - ON Semiconductor

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NCP605

LDO Regulator - Low IGND, CMOS with/without Enable and with Enhanced 500 mA

ON Semiconductor 

NCP605, NCP606

temperature (TA) is 25°C. See Figure 23 for RqJA versus

PCB area.

The power dissipated by the NCP605/NCP606 can be

calculated from the following equations:

ǒ Ǔ PD [ Vin IGND@IOUT ) IoutǒVin * VoutǓ

(eq. 4)

or

PD(MAX) ) ǒVout

Vin(MAX) [

Iout ) IGND

IoutǓ

(eq. 5)

250

Hints

Vin and GND printed circuit board traces should be as

wide as possible. When the impedance of these traces is

high, there is a chance to pick up noise or cause the regulator

to malfunction. Place external components, especially the

output capacitor, as close as possible to the

NCP605/NCP606, and make traces as short as possible.

200

150

FR4 = 1.0 oz

100

FR4 = 2.0 oz

50

0

0

200

400

600

800

COPPER AREA (mm2)

Figure 23. Thermal Resistance vs. Copper Area

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