Overview
The NCP5392, produced by onsemi, is a highly advanced 2/3/4-phase buck controller designed specifically for CPU power management. This controller integrates differential voltage sensing, differential phase current sensing, and adaptive voltage positioning to ensure accurately regulated power for both Intel and AMD processors. It features dual-edge pulse-width modulation (PWM) and inductor current sensing, which enhances the system's response to dynamic load events and reduces overall system cost. The NCP5392 also includes a high-performance operational error amplifier and Dynamic Reference Injection to simplify loop compensation and improve transient response and Dynamic VID performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions |
|---|---|---|---|---|---|
| Switching Frequency Range | 100 | - | 1000 | kHz | - |
| VCC UVLO Start Threshold | 4 | 4.25 | 4.5 | V | - |
| VCC UVLO Stop Threshold | 3.8 | 4.05 | 4.3 | V | - |
| VID Voltage Range | 0.375 | - | 1.6 | V | - |
| Output Impedance – HI or LO State | - | 75 | - | Ω | Resistance to VCC (HI) or GND (LO) |
| Gate Pin Source Current | 60 | 80 | 150 | mA | - |
| Gate Pin Threshold Voltage | 210 | 240 | 265 | mV | - |
| Soft-Start Ramp Time | 1.0 | - | 1.5 | ms | DAC = 0 to DAC = 1.1 V |
| Operating Temperature Range | 0 | - | 85 | °C | - |
Key Features
- Meets Intel’s VR11.1 Specifications and AMD 6 Bit Code Specifications
- Dual-edge PWM for fastest initial response to transient loading
- High-performance operational error amplifier
- Internal soft start
- Dynamic Reference Injection
- DAC range from 0.375 V to 1.6 V with ±0.5% DAC voltage accuracy from 1.0 V to 1.6 V
- True differential remote voltage sensing amplifier
- Phase-to-phase current balancing and “lossless” differential inductor current sensing
- Differential current sense amplifiers for each phase
- Adaptive voltage positioning (AVP)
- Oscillator frequency range of 100 kHz – 1 MHz
- Latched overvoltage protection (OVP) and guaranteed startup into pre-charged loads
- Threshold sensitive enable pin for VTT sensing and power good output with internal delays
- Thermally compensated current monitoring
- Pb-free device
Applications
The NCP5392 is primarily used in power management systems for desktop processors, providing efficient and reliable power delivery to both Intel and AMD CPUs. Its advanced features and robust design make it an ideal choice for high-performance computing applications where precise voltage regulation and fast transient response are critical.
Q & A
- What is the primary function of the NCP5392?
The NCP5392 is a 2/3/4-phase buck controller designed for CPU power management, providing accurate voltage regulation for both Intel and AMD processors.
- What are the key benefits of dual-edge PWM in the NCP5392?
Dual-edge PWM offers the fastest initial response to dynamic load events, reducing system cost and improving transient response.
- What is Dynamic Reference Injection in the NCP5392?
Dynamic Reference Injection simplifies loop compensation by eliminating the need to compromise between closed-loop transient response and Dynamic VID performance.
- What is the operating temperature range of the NCP5392?
The operating temperature range of the NCP5392 is from 0°C to 85°C.
- What are the key specifications for the VID voltage range?
The VID voltage range is from 0.375 V to 1.6 V with ±0.5% DAC voltage accuracy from 1.0 V to 1.6 V.
- Does the NCP5392 support both Intel and AMD processors?
- What is the oscillator frequency range of the NCP5392?
The oscillator frequency range is from 100 kHz to 1 MHz.
- What protection features does the NCP5392 include?
The NCP5392 includes latched overvoltage protection (OVP), under-voltage protection (UVP), and guaranteed startup into pre-charged loads.
- Is the NCP5392 a Pb-free device?
- What is the package type and pin count of the NCP5392?
The NCP5392 comes in a 40-pin QFN package.
- What are the typical applications of the NCP5392?
The NCP5392 is typically used in power management systems for desktop processors.
