Overview
The NCP5380MNR2G, produced by onsemi, is a highly efficient, single-phase, synchronous buck switching regulator controller. This device is optimized for converting the silver box voltage to the supply voltage required by high-performance Intel chipsets. It features an internal 7-bit DAC that reads a VID code directly from the chipset, ensuring compliance with Intel VR11 CPU chipset voltage regulator specifications.
The NCP5380MNR2G is part of the NCP5380/A family, with the NCP5380 specified over a temperature range of 0°C to 85°C, and the NCP5380A extending this range to −40°C to 100°C. The device is available in a 32-lead QFN package and is Pb-free.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|
| Voltage Error Amplifier Offset Voltage (VOSVEA) | −0.5 | +0.5 | mV | Relative to CSREF = VDAC | |
| Oscillator Frequency (fOSC) | 300 | 600 | 725 | kHz | RT = 120 kΩ, VVID = 1.20 V, Clocked PWM Mode |
| Supply Voltage Range (VCC) | 4.5 | 5.5 | V | ||
| Supply Current | 4.2 | 10 | mA | Normal mode | |
| VCC OK Threshold Voltage (VCCOK) | 4.4 | 4.5 | V | VCC rising | |
| Operating Ambient Temperature Range | −40 | 100 | °C | ||
| Thermal Impedance (θJA) | 32.6 | °C/W | 2-Layer Board |
Key Features
- Single-chip solution with integrated MOSFET drivers
- Fully compatible with Intel VR11 CPU chipset voltage regulator specifications
- 7-bit, digitally programmable DAC for precise voltage control
- Programmable switching frequency for optimized efficiency
- Programmable load line slope function for optimal core voltage positioning during load transients
- Automatic power-saving modes to maximize efficiency during light load operation
- Soft transient control to reduce inrush current and audio noise
- Independent current limit and load line setting inputs for additional design flexibility
- Built-in power-good masking supports voltage identification (VID) on-the-fly transients
- Short-circuit protection with programmable latchoff delay
- Current monitor output signal
- Pb-free device
Applications
The NCP5380MNR2G is primarily used in desktop power supplies for next-generation Intel chipsets. Its high efficiency, precise voltage control, and robust protection features make it an ideal choice for powering high-performance computing systems.
Q & A
- What is the primary function of the NCP5380MNR2G?
The NCP5380MNR2G is a single-phase, synchronous buck switching regulator controller designed to convert the silver box voltage to the supply voltage required by high-performance Intel chipsets.
- What is the temperature range for the NCP5380 and NCP5380A?
The NCP5380 is specified over a temperature range of 0°C to 85°C, while the NCP5380A extends this range to −40°C to 100°C.
- What package type is the NCP5380MNR2G available in?
The NCP5380MNR2G is available in a 32-lead QFN package.
- What is the purpose of the 7-bit DAC in the NCP5380MNR2G?
The 7-bit DAC reads a VID code directly from the chipset, ensuring compliance with Intel VR11 CPU chipset voltage regulator specifications.
- How does the NCP5380MNR2G optimize efficiency?
The device optimizes efficiency through programmable switching frequency, automatic power-saving modes during light load operation, and minimized thermal switching losses due to lower frequency operation.
- What protection features does the NCP5380MNR2G include?
The device includes short-circuit protection with programmable latchoff delay, current overload protection, and built-in power-good masking.
- What is the significance of the soft transient control feature?
The soft transient control feature reduces inrush current and audio noise during transient events such as VID changes.
- How does the NCP5380MNR2G handle load transients?
The device includes a programmable load line slope function to adjust the output voltage as a function of the load current, ensuring optimal core voltage positioning during load transients.
- Is the NCP5380MNR2G Pb-free?
- What is the typical supply current of the NCP5380MNR2G in normal mode?
The typical supply current in normal mode is 4.2 mA to 10 mA.
- What is the thermal impedance of the NCP5380MNR2G on a 2-layer board?
The thermal impedance (θJA) is 32.6°C/W on a 2-layer board.
