NCP81248: Three-Rail Buck Controller for IMVP8
The NCP81248 contains a two−phase, and two single−phase buck
regulator controllers optimized for Intel IMVP8 compatible CPUs.
The two−phase controller combines true differential voltage
sensing, differential inductor DCR current sensing, input voltage
feed−forward, and adaptive voltage positioning to provide accurately
regulated power for IMVP8 CPU.
The two single−phase controllers make use of ON Semiconductor’s
patented high performance RPM operation. RPM control maximizes
transient response while allowing smooth transitions between
discontinuous frequency scaling operation and continuous mode full
power operation. The single−phase rails have a low offset current
monitor amplifier with programmable offset compensation for high
accuracy current monitoring.
Features- Vin Range 4.5 V to 25 V
- Startup into Pre−Charged Loads While Avoiding False OVP
- Adjustable Vboot (except Rail 3)
- High Impedance Differential Output Voltage Amplifiers
- Dynamic Reference Injection
- Programmable Output Voltage Slew Rates
- Dynamic VID Feed−Forward
- Differential Current Sense Amplifiers for Each Phase
- Switching Frequency Range of 200 kHz – 1.2 MHz
- Digitally Stabilized Switching Frequency
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Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP81248MNTXG | Active | Pb-free
Halide free | QFN-48 | 485BA | 1 | Tape and Reel | 2500 | $1.314 |
Specifications
| Product | Topology | Phases | Control Mode | VCC Min (V) | VCC Max (V) | fSW Typ (kHz) | tres Typ (ns) |
|---|
| NCP81248MNTXG | Step-Down | 1/2 | Current/Voltage Mode | 4.75 | 5.25 | 200-1200 | |
