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LM3753 - Scalable 2-Phase Synchronous Buck Controllers

Description

The LM3753 and LM3754 are full featured single-output dualphase voltage-mode synchronous PWM buck controllers.

They can be configured to control from 2 to 12 interleaved power stages creating a single high power output.

Features

  • Wide input voltage range of 4.5V to 18V.
  • Up to 12 channels for 300A load.
  • System accuracy better than 1%.
  • 0.6V to 3.6V output voltage range.
  • Switching frequency from 200 kHz to 1 MHz.
  • Phase current sharing ±12% max over temperature.
  • Integrated 4.35V ±2.3% LDO.
  • Inductor DCR or sense resistor current sensing.
  • Interleaved switching for low I/O ripple current.
  • Integrated synchronous NFET drivers.
  • Programmable Soft-Start (LM3754) or Tracking (L.

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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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LM3753/54 Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers and Linear Regulator Controller LM3753/54 December 14, 2009 Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers and Linear Regulator Controller General Description The LM3753 and LM3754 are full featured single-output dualphase voltage-mode synchronous PWM buck controllers. They can be configured to control from 2 to 12 interleaved power stages creating a single high power output. Both controllers utilize voltage-mode control with input voltage feedforward for high noise immunity. An internal average current loop forces real time current sharing between phases during load transients. The LM3753 supports a Tracking function, while the LM3754 supports adjustable Soft-Start.
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