LM3753SQX

• Wide input voltage range of 4.5V to 18V
• 12 channels with 300A load
• System accuracy better than 1%
• Output voltage range from 0.6V to 3.6V
• Switching frequencies from 200 kHz to 1 MHz
• Phase current sharing ± 12% maximum over the entire temperature range
• Combined 4.35V ± 2.3% LDO
• Inductive DCR or inductive resistor current sensing
• Interleaved switching of ripple currents with low I/O
• Integrated synchronized NFET driver
• Programmable Soft Start (LM3754) or Track (LM3753)
• Pre-Bias Start (LM3754)
• Output voltage difference remote sensing
• The minimum controllable time is only 50 nanoseconds
• Programmable to enable and input UVLO
• The power supply is well marked
• OVP, UVP and Hiccup overcurrent protection

illustrate

The LM3753 and LM3754 are full-featured, dual-phase, single-output voltage-mode synchronous PWM buck controllers. They can be configured from 2 to 12 staggered power stages to establish a single high-power output control. Both controllers are controlled in a feedforward voltage mode with a high noise immunity with an input voltage. Internal current loop average forces share current between phases in real time during load transients.

The LM3753 supports tracking functions, while the LM3754 supports adjustable soft start. The LM3753 tracking is always enabled, allowing the output to be controlled up and down. The LM3754 with a soft-start function can only go up to the output of the drive - it does not pull down, therefore, the pre-bias load cannot be discharged in time. It is available in a 5 mm x 5 mm thermal pad thermally enhanced 32-pin LLP package.

apply

• CPUs, GPUs (graphics cards), structured ASICs, FPGAs, mass memory arrays, disarmament, demobilization and reintegration
• High current POL converter
• Network system
• Power distribution system
• Telecom/Datacom DC/DC converters
• Desktops, servers, and workstations