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LM3754

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4.5-V to 18-V, scalable 2-phase synchronous buck controller with integrated FET drivers

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Data sheet

LM3754

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 18 Iout (max) (A) 50 Operating temperature range (°C) -5 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 3.6 Features Enable, Remote Sense Iq (typ) (µA) 650 Duty cycle (max) (%) 81 Number of phases 2
Vin (min) (V) 4.5 Vin (max) (V) 18 Iout (max) (A) 50 Operating temperature range (°C) -5 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 3.6 Features Enable, Remote Sense Iq (typ) (µA) 650 Duty cycle (max) (%) 81 Number of phases 2
WQFN (RTV) 32 25 mm² 5 x 5
  • 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
  • Pre-Biased Startup
  • Output Voltage Differential Remote Sensing
  • Minimum Controllable On-Time of Only 50 ns
  • Programmable Enable and Input UVLO
  • Power Good flag
  • OVP, UVP and Hiccup Over-Current Protection

All trademarks are the property of their respective owners.

  • 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
  • Pre-Biased Startup
  • Output Voltage Differential Remote Sensing
  • Minimum Controllable On-Time of Only 50 ns
  • Programmable Enable and Input UVLO
  • Power Good flag
  • OVP, UVP and Hiccup Over-Current Protection

All trademarks are the property of their respective owners.

The LM3754 is a full featured single-output dual-phase voltage-mode synchronous PWM buck controller. It can be configured to control from 2 to 12 interleaved power stages creating a single high power output. This controller utilizes voltage-mode control with input voltage feed-forward for high noise immunity. An internal average current loop forces real time current sharing between phases during load transients.

The LM3754 supports adjustable Soft-Start. The Soft-Start function can only drive the output upwards – it will not pull it down, therefore, pre-biased loads will not be discharged. Available in the 5 mm x 5 mm thermally enhanced 32-lead WQFN package with a thermal pad.

The LM3754 is a full featured single-output dual-phase voltage-mode synchronous PWM buck controller. It can be configured to control from 2 to 12 interleaved power stages creating a single high power output. This controller utilizes voltage-mode control with input voltage feed-forward for high noise immunity. An internal average current loop forces real time current sharing between phases during load transients.

The LM3754 supports adjustable Soft-Start. The Soft-Start function can only drive the output upwards – it will not pull it down, therefore, pre-biased loads will not be discharged. Available in the 5 mm x 5 mm thermally enhanced 32-lead WQFN package with a thermal pad.
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* Data sheet LM3754 Scalable 2-Phase Synchronous Buck Controller w/ FET datasheet (Rev. B) 05 Apr 2013

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