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NCP334

2A Ultra-Small Controlled Load Switch with Auto-Discharge Path

ON Semiconductor 

NCP334, NCP335

Figure 14. Routing Example 2 oz, 4 Layers, 605C/W

Example of application definition.

TJ * TA + RqJA Pd + RqJA RDS(on) I2

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 Rtheta obtain with:

1 oz, 2 layers: 100°C/W.

At 2 A, 25°C ambient temperature, RDS(on) 42 mW @ VIN

4.2 V, the junction temperature will be:

TJ + TA ) Rq Pd + 25 ) ǒ0.042 22Ǔ 100 + 41.8° CńW

Taking into account of Rq obtain with:

2 oz, 4 layers: 60°C/W.

At 2 A, 25°C ambient temperature, RDS(on) 42 mW @ VIN

4.2 V, the junction temperature will be:

TJ + TA ) Rq Pd + 25 ) ǒ0.042 22Ǔ 60 + 35° C.

ORDERING INFORMATION

Device

Marking

Package

Shipping†

NCP334FCT2G

AD

WLCSP 0.96 x 0.96 mm

(Pb−Free)

3000 / Tape & Reel

NCP335FCT2G

AA

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.

http://onsemi.com

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