Overview
The NCP81255MNTXG is a high-performance, single-phase voltage regulator designed by onsemi. It is specifically tailored to support a wide range of computing applications, particularly those utilizing Intel's proprietary IMVP8 interface. This regulator integrates power MOSFETs and features a digitally enhanced current mode RPM (Rapid Pulse Modulation) control system, which ensures excellent transient response and minimizes transient aliasing. The device operates at high switching frequencies up to 1.2 MHz, allowing the use of small inductors and capacitors, and it supports auto DCM (Discontinuous Conduction Mode) operation to save power at light loads.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Current (TDC) | - | - | 14 A | A |
| Switching Frequency | - | - | 1.2 MHz | Hz |
| Power Supply Voltage to PGND (VVIN) | - | - | 30 V | V |
| Analog Supply Voltage to GND (VCC, VCCP) | -0.3 | - | 6.5 V | V |
| Operating Junction Temperature Range (TJ) | -40 | - | 125 °C | °C |
| Operating Ambient Temperature Range (TA) | -40 | - | 100 °C | °C |
| Storage Temperature Range (TSTG) | -40 | - | 150 °C | °C |
| Package Type | - | - | QFN40 (5 mm × 5 mm) | - |
Key Features
- High-performance RPM control system for excellent transient response
- Support for Intel's proprietary IMVP8 interface
- Auto DCM operation in high current power states to save power
- Ultra-low offset current monitor amplifier with programmable offset compensation
- Dynamic VID feed-forward and programmable droop gain
- Zero droop capability
- Thermal monitor and PSYS input monitor
- UltraSonic operation and digitally controlled operating frequency
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
The NCP81255MNTXG is designed for various computing applications, particularly those requiring the IMVP8 Intel proprietary interface. It is suitable for Rail1, Rail3, and Rail4 in IMVP8 systems, making it an ideal choice for high-performance computing environments where precise voltage regulation and high current delivery are necessary.
Q & A
- What is the maximum output current of the NCP81255MNTXG?
The NCP81255MNTXG can deliver up to 14 A TDC (Total DC) output current.
- What is the switching frequency range of the NCP81255MNTXG?
The device operates at switching frequencies up to 1.2 MHz.
- What is the operating temperature range of the NCP81255MNTXG?
The operating junction temperature range is -40°C to 125°C, and the operating ambient temperature range is -40°C to 100°C.
- Does the NCP81255MNTXG support Intel's proprietary interface?
Yes, it supports Intel's proprietary IMVP8 interface.
- What is the package type of the NCP81255MNTXG?
The device comes in a QFN40 package with dimensions of 5 mm × 5 mm.
- Is the NCP81255MNTXG RoHS compliant?
Yes, the device is Pb-free, halogen-free/BFR-free, and RoHS compliant).
- What are the key features of the NCP81255MNTXG's control system?
The device features a high-performance RPM control system, auto DCM operation, ultra-low offset current monitor amplifier, and dynamic VID feed-forward among others).
- How does the NCP81255MNTXG handle thermal monitoring?
The device includes a thermal monitor and PSYS input monitor to ensure proper thermal management).
- What are the typical applications for the NCP81255MNTXG?
The device is suitable for Rail1, Rail3, and Rail4 in IMVP8 systems, making it ideal for high-performance computing environments).
- How does the NCP81255MNTXG manage overcurrent protection?
The device includes an overcurrent protection mechanism with an internal latch-off timer that shuts down the controller if the fault is not removed).
- What are the electrical layout considerations for the NCP81255MNTXG?
Good electrical layout is crucial, with recommendations to use wide and short traces for power paths, place inductor current sense RC filters close to the CSN and CSP pins, and ensure VCC decoupling caps are close to the VCC pin).
