SiP32401A, SiP32402A

www.vishay.com

Vishay Siliconix

S15-1246-Rev. D, 01-Jun-15

10

Document Number: 63705

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

It then follows that, assuming an ambient temperature of

70 °C, the maximum power dissipation will be limited to

about 324 mW.

So long as the load current is below the 2.8 A limit, the

maximum continuous switch current becomes a function of

the ambient temperature.

As an example let us calculate the worst case maximum

occurs at an input voltage of 1.2 V and is equal to 76 m

Ω.

the following formula:

we have

Ω x (1 + 0.00425 x (70 °C - 25 °C))

= 90.5 m

Ω

The maximum current limit is then determined by

which in case is 1.9 A. Under the stated input voltage

condition, if the 1.9 A current limit is exceeded the internal

die temperature will rise and eventually, possibly damage

the device.

Recommended Board Layout

For the best performance, all traces should be as short as

possible to minimize the inductance and parasitic effects.

The input and output capacitors should be kept as close

as possible to the input and output pins respectively.

Connecting the central exposed pad to GND, using wide

traces for input, output, and GND help reducing the case to

ambient thermal impedance.

Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon

Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and

reliability data, see www.vishay.com/ppg?63705.

(max.)

(max.)

DS

LOAD

R

P

I<