What this switch does on your board
The NX3P1108UKZ is a single-channel P-channel load switch from NXP, built for general-purpose power-domain switching.
Package and footprint realities
This part comes in a 4-bump WLCSP measuring 0.96 x 0.96 mm.

NXP NX3P1108UKZ, P-Channel General Purpose Power Switch, 1:1 High Side, 1 Output, 1.5A, 34mOhm Typ, 0.9V-3.6V Load, 4-WLCSP (0.96x0.96mm), -40°C to 85°C.
| Parameter | Value |
|---|---|
| Output type | P-Channel |
| Type | General Purpose |
| Mounting | Surface Mount |
| Voltage - load | 0.9V ~ 3.6V |
| Voltage - supply (Vcc (Vdd)) | Not Required |
| Output current | 1.5A |
| I/O channels | 1 |
| Interface | On/Off |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Features | Load Discharge, Slew Rate Controlled |
| Rds on | 34mOhm |
| Case | 4-UFBGA, WLCSP |
| Output configuration | High Side |
| Ratio - Input:Output | 1:1 |
The NX3P1108UKZ is a single-channel P-channel load switch from NXP, built for general-purpose power-domain switching.
This part comes in a 4-bump WLCSP measuring 0.96 x 0.96 mm.
The NX3P1108UKZ is a 4-bump WLCSP. Pin 1 is the input (VIN), pin 2 is the output (VOUT), pin 3 is the enable (ON), and pin 4 is ground (GND). The enable is active-high; leave it floating or tie to GND to keep the switch off.
Within the same NX3P1xxx family, the NX3P1108UKZ sits between the 1 A NX3P1xxx and the 2 A NX3P2xxx variants, all sharing the same 4-WLCSP footprint and pinout. For a different package, the NX3P1108GM (XQFN8) offers the same electrical specs in a larger, easier-to-handle package.
Yes, the NX3P1108UKZ is ROHS3 compliant, meaning it meets the latest EU RoHS directive with no exemptions for lead, mercury, cadmium, or other restricted substances.