NCP435 datasheet(9/10 Pages) ONSEMI

9 / 10 page

NCP434, NCP435

www.onsemi.com

Figure 16. Routing Example 2 oz, 4 Layers, 60

5C/W

Example of Application Definition

J * TA + R

qJA

D + R

qJA

DS(on)

TJ: Junction Temperature.

TA: Ambient Temperature.

Rq = Thermal resistance between IC and air, through PCB.

RDS(on): intrinsic resistance of the IC MOSFET.

I: load DC current.

Taking into account of Rq obtain with:

• 1 oz, 2 layers: 100°C/W.

At 2 A, 25

°C ambient temperature, RDS(on) 44 mW @ VIN

1.8 V, the junction temperature will be:

J + R

qJA

D + 25 ) 0.044

100

+ 46° C

Taking into account of Rtq obtain with:

• 2 oz, 4 layers: 60°C/W.

At 2 A, 25

°C ambient temperature, RDS(on) 44 mW @ VIN

1.8 V, the junction temperature will be:

J + TA ) R

D + 25 ) 0.044

+ 35.5° C

ORDERING INFORMATION

Device

Marking

Package

Shipping†

NCP434FCT2G

WLCSP 0.96 x 0.96 mm

(Pb−Free)

3000 / Tape & Reel

NCP435FCT2G

WLCSP 0.96 x 0.96 mm

(Pb−Free)

3000 / Tape & Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

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