NCP81243: Multi-Phase Buck Controller for IMVP8
The NCP81243 is a Multi-Phase buck solution is optimized for Intel IMVP8 compatible CPUs with user configurations of 3/2/1+ 2/1 phases, including an option to do 4+1. The controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed-forward, and adaptive voltage positioning to provide accurate regulated power for Desktop applications. The control system is based on Dual-Edge pulse-width modulation (PWM) combined with DCR current sensing providing the fastest initial response to dynamic load events at reduced system cost.
Features- Meets Intel's IMVP8 Specification
- Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading
- Dual High Performance Operational Error Amplifier
- One Digital Soft Start Ramp for Both Rails
- Dynamic Reference Injection® (Patent #US07057381)
- Accurate Total Summing Current Amplifier(Patent #US006683441)
- DAC with Droop Feed-forward Injection(Patent Pending)
- 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)
- Switching Frequency Range of 200KHz – 1.5MHz
- Startup into Pre-Charged Loads while avoiding False OVP
- Vin Feed Forward Ramp Slope
- Over Voltage Protection (OVP) & Under Voltage Protection (UVP)
- Over Current Protection (OCP)
- Dual Power Good Output with Internal Delays
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Applications- Industrial Servers
- Embedded Systems Power Management
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Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP81243MNTXG | Active | Pb-free
Halide free | QFN-52 | 485BE | 1 | Tape and Reel | 2500 | $0.9 |
Specifications
| Product | Topology | Phases | Control Mode | VCC Min (V) | VCC Max (V) | fSW Typ (kHz) | tres Typ (ns) |
|---|
| NCP81243MNTXG | Step-Down | 1/2/3 | Voltage Mode | 4.75 | 5.25 | 300-1200 | |
