NX5P2553

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© NXP Semiconductors N.V. 2015. All rights reserved.

Product data sheet

Rev. 1 — 6 July 2015

16 of 24

NXP Semiconductors

NX5P2553

Precision adjustable current-limited power switch

14. Application information

14.1 Application diagram

14.2 Best practices

In order to avoid product damage, the device should always operate within the boundaries

given in Section 9. However, in applications with high switching currents, these limits

might be violated during transients even when the static values are well within the limiting

values. The device includes soft-start which limits in-rush current when enabling the

N-channel MOSFET. This feature does not limit current transients due to load change

when the N-channel MOSFET is already enabled.

The following aspects can be taken as guideline:

Fig 23. Switch current versus switch voltage

Fig 24. Switch current versus switch voltage

VOUT-VIN (mV)

0

200

100

aaa-011216

560

840

280

1120

1400

(mA)

0

(1)

(2)

(3)

VOUT-VIN (mV)

0

200

100

aaa-011217

160

(mA)

0

40

80

120

(3)

(2)

(1)

For the IEC61000-4-2 contact discharge test, the 10

F input capacitance is not needed.

Fig 25. Application diagram

aaa-007802

100 kΩ

10 μF

0.1 μF

120 μF

FAULT

FAULT signal

5 V

USB input

control signal

EN

VIN

VOUT

USB

port

USB data

ILIM

GND

RILIM

20 kΩ