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FAN5236 - Dual Mobile-Friendly DDR / Dual-output PWM Controller

General Description

The FAN5236 PWM controller provides high efficiency and regulation for two output voltages adjustable in the range from 0.9V to 5.5V that are required to power I/O, chip-sets, and memory banks in high-performance notebook computers, PDAs and Internet appliances.

Key Features

  • proper powering of DDR chips. The buffered reference voltage required by this type of memory is also provided. The FAN5236 monitors these outputs and generates separate PGx (power good) signals when the soft-start is completed and the output is within ±10% of its set point. A built-in over-voltage protection prevents the output voltage from going above 120% of the set point. Normal operation is automatically restored when the over-voltage conditions go away. Under-voltage protection latches the.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.fairchildsemi.com FAN5236 Dual Mobile-Friendly DDR / Dual-output PWM Controller Features • Highly flexible dual synchronous switching PWM controller includes modes for: – DDR mode with in-phase operation for reduced channel interference – 90˚ phase shifted two-stage DDR Mode for reduced input ripple – Dual Independent regulators 180° phase shifted • Complete DDR Memory power solution – VTT Tracks VDDQ/2 – VDDQ/2 Buffered Reference Output • Lossless current sensing on low-side MOSFET or precision over-current using sense resistor • VCC Under-voltage Lockout • Converters can operate from +5V or 3.