Controllers | NCP81246

Three-Rail Multi Phase Buck Controller for IMVP8

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Overview

The NCP81246 is a 3 Rail Multi Phase Buck solution is optimized for Intel IMVP8 compatible CPUs. It contains a two-phase, and two single-phase rails supporting Core, GT and SA in the following configurations 2ph-1ph-1ph, 1ph-2ph-1ph and 1ph-1ph-1ph. The part is designed for Notebook and Ultrabook applications. 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. The two single-phase controllers can be used for Core, GT or SA rails. Both make use of onsemi’s patented high performance RPM operation. RPM control maximizes transient response while allowing for smooth transitions between discontinuous frequency scaling operation and continuous mode full power operation. The single-phase rails have an ultra low offset current monitor amplifier with programmable offset compensation for ultra high accuracy current monitoring.The NCP81246 offers three internal MOSFET Drivers with a single external PWM signal

  • Embedded Systems

  • 3 Internal Drivers
  • High performance RPM control system
  • Dual Edge Modulation for multiphase rails
  • Dynamic VID Feed-Forward
  • Adaptive Voltage Positioning (AVP)
  • Switching Frequency Range of 300 kHz – 750 kHz
  • Phase to Phase dynamic current balance

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NCP81246MNTXG

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Active

CAD Model

Pb

A

H

P

QFN-52

485BE

1

260

REEL

2500

Y

Step-Down

1/2

Voltage Mode

4.75

5.25

300 - 750

$1.2565

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Reliability Data

Die Related Summary Data

Device: NCP81246MNTXG

Equivalent to wafer fab process: ONC25

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Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

ONC25

1

2712519294

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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