USB PD and Type-C current-limited power switch
Rev. 1.2 — 7 June 2019
Product data sheet
1. General description
The NX5P3290 is a precision adjustable current-limited power switch for USB PD
application. The device includes under voltage lockout, over-temperature protection, and
reverse current protection circuits to automatically isolate the switch terminals when a
fault condition occurs. The 29 V tolerance on VBUS pin ensures the device is able to work
on a USB PD port; a current limit input (ILIM) pin defines the overcurrent limit threshold;
an open-drain fault output (FLT) indicates when a fault condition has occurred.
The overcurrent limit threshold can be programmed from 400 mA to 3.3 A, using an
external resistor between the ILIM pin and GND pin. In the overcurrent condition, the
device will clamp the output current to the value set by ILIM and keep the switch on while
asserting the FLT flag.
To minimize current surges during normal turn on, the device has built in soft start by
limiting the power switch turn on slew rate. However, user can disable the soft start and
request a fast output by pulling FO pin HIGH.
A fast RCP recovery circuit has been added to the switch to prevent any reverse current
flowing back to power source at all times. When exiting from reverse current protection
state, the power MOSFET will turn on within 50 us. The fast RCP recovery ensures the
voltage on VBUS doesn’t drop too much in a power source swap application.
NX5P3290 is offered in a 2.05 x 2.05 mm, 16 bump WLCSP package.
2. Features and benefits
VIN supply voltage range from 4.0 V to 5.5 V
All time reverse current protection with ultra fast RCP recovery
Adjustable current limit from 400 mA to 3.3 A
Clamped current output in overcurrent condition
29 V high voltage tolerance on VBUS pin
Low ON resistance of the power FETs: 35 m (typical) in total
Over temperature protection
UL 62368-1, 2nd edition, file no. 20161017-E470128
IEC 62368-1, 2nd edition, file no. DK-57975-UL
IEC61000-4-2 contact discharge exceeds 8 kV on VBUS
HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 2 kV
CDM AEC standard Q100-01 (JESD22-C101E) exceeds 500 V
Specified from 40 C to +85 C ambient temperature