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FAN5234 Datasheet Mobile-Friendly PWM/PFM Controller

Manufacturer: Fairchild (now onsemi)

General Description

The FAN5234 PWM controller provides high efficiency and regulation with an adjustable output from 0.9V to 5.5V that are required to power I/O, chip-sets, memory banks or peripherals in high-performance notebook computers, PDAs and Internet appliances.

Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of loads.

The hysteretic mode of operation can be disabled if PWM mode is desired for all load levels.

Overview

www.fairchildsemi.com FAN5234 Mobile-Friendly PWM/PFM Controller.

Key Features

  • Wide input voltage range (2 to 24V) for Mobile systems.
  • Excellent dynamic response with Voltage Feed-Forward and Average Current Mode control.
  • Lossless current sensing on low-side MOSFET or precision over-current using sense resistor.
  • VCC Under-voltage Lockout.
  • Power-Good Signal.
  • Light load Hysteretic mode maximizes efficiency.
  • QSOP16, TSSOP16.
  • 300Khz or 600Khz operation General.