NX5P2190

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

Product data sheet

Rev. 1.1 — 15 January 2015

6 of 20

NXP Semiconductors

NX5P2190

Logic controlled high-side power switch

8.7 Reverse bias current/back drive protection (RCP)

The reverse bias current protection circuit can only be triggered when EN is set HIGH. If

VBUS > (VINT + 30 mV) for longer than 4 ms; or VBUS > (VINT + 0.45 V) the device is in

reverse bias. The RCP circuit disables the N-channel MOSFET and sets the FAULT

output LOW. Once VBUS < VINT for longer than 4 ms the device returns to the defined

state. If the RCP circuit is active, setting the EN pin LOW returns the device to low-power

mode.

8.8 FAULT output

The FAULT output is an open-drain output that requires an external pull-up resistor. If any

of the UVLO, OVLO, RCP, OCP or OTP circuits is activated, the FAULT output is set LOW

to indicate that a fault has occurred. The FAULT output returns to the high impedance

state automatically once the fault condition is removed.

8.9 VDET output

VDET is an analog output that allows a controller to monitor the voltage level on VBUS.

8.10 In-rush current protection

When the N-channel MOSFET is enabled, the in-rush current protection circuit clamps the

switch current until VBUS = VINT

 200 mV. The resistor connected to ILIM sets the clamp

current. The in-rush current protection circuit is disabled in low-power mode.