Overview
The NCP339BFCT2G is a high-side P-channel MOSFET power distribution switch designed by onsemi. This component is optimized for battery life and portable device autonomy, featuring a very low on-state resistance (Rdson) and a wide input voltage range from 1.2 V to 5.5 V. It is packaged in a compact WLCSP6 (1 x 1.5 mm) and includes an auto-discharge path to efficiently manage power in various portable devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 1.2 - 5.5 | V |
| Maximum DC Current | 3 | A |
| On-State Resistance (Rdson) at 4.5 V | 19 | mΩ |
| Enable Input Voltage | 0 - 5.5 | V |
| Quiescent Current (Vin = 4.2 V, EN = high) | 1.0 - 1.5 | μA |
| Standby Current (Vin = 4.2 V, EN = low) | 0.35 - 0.6 | μA |
| Reverse Threshold Voltage | 40 | mV |
| Reverse Threshold Hysteresis | 60 | mV |
| Junction Temperature Range | -40 to +125 | °C |
| Storage Temperature Range | -55 to +150 | °C |
| Package Type | WLCSP6 (1 x 1.5 mm) |
Key Features
- Very low Rdson (on-state resistance) to minimize power loss.
- Wide input voltage range from 1.2 V to 5.5 V.
- Active high enable input (EN pin) for easy control.
- Reverse blocking feature to prevent reverse current flow.
- Auto-discharge path to quickly discharge output capacitors when the switch is turned off.
- Soft start control to reduce inrush current.
- Low quiescent current to optimize battery life.
- Pb-free and RoHS compliant.
Applications
- Mobile Phones
- Tablets
- Digital Cameras
- GPS Devices
- Portable Devices
- Computers
Q & A
- What is the operating voltage range of the NCP339BFCT2G?
The operating voltage range is from 1.2 V to 5.5 V. - What is the maximum DC current the NCP339BFCT2G can handle?
The maximum DC current is up to 3 A. - What is the typical on-state resistance (Rdson) at 4.5 V?
The typical Rdson at 4.5 V is 19 mΩ. - How does the reverse blocking feature work?
The reverse blocking feature prevents reverse current flow by automatically engaging if the output voltage (Vout) exceeds the input voltage (Vin) by a threshold voltage (Vrev_thr). - What is the purpose of the auto-discharge path?
The auto-discharge path quickly discharges the output capacitors when the switch is turned off, reducing the time it takes for the output to reach ground potential. - What is the recommended decoupling capacitor configuration?
A 1 μF or greater ceramic capacitor should be connected from IN to GND, and a 100 nF ceramic capacitor from OUT to GND, as close as possible to the IC. - How does the soft start control function?
The soft start control reduces inrush current during startup, helping to stabilize the power supply and prevent voltage spikes. - What are the thermal considerations for PCB design?
The PCB design should ensure good heat dissipation, especially around the IN and OUT pins, to reduce the thermal resistance (RθJA) and allow higher power dissipation. - Is the NCP339BFCT2G Pb-free and RoHS compliant?
Yes, the NCP339BFCT2G is Pb-free and RoHS compliant. - What are the typical applications for the NCP339BFCT2G?
Typical applications include mobile phones, tablets, digital cameras, GPS devices, portable devices, and computers.
