Low Voltage Synchronous Buck Controller

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Overview

The NCP81147 is a single phase solution with differential phase current sensing, synchronization input, remote ground power saving operation, and gate drivers to provide accurately regulated power. The adaptive non overlap gate drive and power saving operation circuit provide a low switching loss and high efficiency solution for server, notebook, and desktop systems. A high performance operational error amplifier is provided to simplify compensation of the system. The NCP81147 features also include softstart sequence, accurate overvoltage and over current protection, UVLO for power supply rails, and thermal shutdown.

  • Desktop and Server Systems
  • Internal High Performance Operational Amplifier
  • Supports 5.0 V to 19 V input
  • 5.0 V to 12 v operation
  • Chip enable feature through the OSC pin
  • Integrated MOSFET drivers
  • Guaranteed startup into pre-charged loads
  • Thermal shutdown protection
  • Overvoltage and over current protection
  • Internal softstart / stop
  • Oscillator frequency range of 100 kHz to 1000 kHz
  • Power Saving Mode
  • OCP accuracy, Four re-entry times before latch
  • Lossless differential inductor current sensing
  • Internal High precision current sensing amplifier
  • 20ns Adaptive FET non-overlap time of internal Gate Driver
  • Vout from 0.8V to 3.3V (5V with 12V VCC)
  • Thermally compensated current monitoring
  • Integrated Boost diode with internal Rbst=2.2
  • Load Operation
  • Sync Function
  • Remote Ground Sensing

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NCP81147MNTXG

Active

Pb

A

H

P

QFN-16

1

260

REEL

3000

N

Step-Down

1

-

4.5

13.2

-

$0.5733

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