Overview
The NCP81243MNTXG is a dual output, 3+2 phase buck controller designed by onsemi, optimized for Intel’s IMVP8 CPUs. This controller is tailored for both desktop and notebook applications, offering advanced features to ensure accurate and efficient power regulation. It incorporates true differential voltage sensing, differential inductor DCR current sensing, input voltage feed-forward, and adaptive voltage positioning to maintain precise voltage regulation under various load conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | 4.75 | 5.25 | 6.5 | V |
| Switching Frequency Range | 300 kHz | - | 1.4 MHz | - |
| Switching Frequency Accuracy | -10% | - | 10% | - |
| Operating Junction Temperature Range | -40°C | - | 125°C | - |
| Operating Ambient Temperature Range | -40°C | - | 100°C | - |
| Maximum Storage Temperature Range | -40°C | - | 150°C | - |
| Thermal Characteristic (RJA) | - | - | 68 °C/W | - |
| UVLO Threshold (VCC rising) | - | - | 4.5 V | - |
| UVLO Threshold (VCC falling) | - | - | 4 V | - |
| UVLO Hysteresis | - | - | 200 mV | - |
Key Features
- Meets Intel’s IMVP8 Specification
- Current Mode Dual Edge Modulation for fast initial response to transient loading
- Dual high performance operational error amplifiers
- One digital soft start ramp for both rails
- Dynamic Reference Injection for simplified loop compensation
- Accurate Total Summing Current Amplifier
- DAC with droop feed-forward injection
- Dual high impedance differential voltage and total current sense amplifiers
- Phase-to-phase dynamic current balancing
- “Lossless” DCR current sensing for current balancing
- Summed compensated inductor current sensing for droop
- True differential current balancing sense amplifiers for each phase
- Adaptive Voltage Positioning (AVP)
- Pin programmable power saving phase shedding
- Vin feed forward ramp slope
- Over Voltage Protection (OVP) & Under Voltage Protection (UVP)
- Over Current Protection (OCP)
- Dual Power Good Output with internal delays
- Pb-free and RoHS compliant
Applications
- Desktop processors
- Notebook processors
- Gaming systems
Q & A
- What is the primary application of the NCP81243MNTXG?
The NCP81243MNTXG is primarily used for regulating power in desktop and notebook processors, especially those compliant with Intel’s IMVP8 specification.
- What are the key features of the NCP81243MNTXG?
The key features include current mode dual edge modulation, dynamic reference injection, accurate total summing current amplifier, and adaptive voltage positioning, among others.
- What is the switching frequency range of the NCP81243MNTXG?
The switching frequency range is from 300 kHz to 1.4 MHz.
- Does the NCP81243MNTXG support phase shedding?
Yes, it supports pin programmable power saving phase shedding.
- What kind of protection mechanisms does the NCP81243MNTXG have?
The controller includes Over Voltage Protection (OVP), Under Voltage Protection (UVP), and Over Current Protection (OCP).
- Is the NCP81243MNTXG RoHS compliant?
Yes, the device is Pb-free and RoHS compliant.
- What is the operating junction temperature range of the NCP81243MNTXG?
The operating junction temperature range is from -40°C to 125°C.
- How does the NCP81243MNTXG handle transient load events?
The controller uses dual-edge pulse-width modulation combined with DCR current sensing to provide an ultra-fast initial response to dynamic load events.
- What is the purpose of the Dynamic Reference Injection feature?
The Dynamic Reference Injection simplifies loop compensation by eliminating the need to compromise between closed-loop transient response and Dynamic VID performance.
- Does the NCP81243MNTXG support adaptive voltage positioning?
Yes, it supports adaptive voltage positioning (AVP).
