National Semiconductor LM3753
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.| Part No. | LM3753 |
|---|---|
| Datasheet | LM3753 Download |
| Manufacturer |  National Semiconductor |
| Description | Scalable 2-Phase Synchronous Buck Controllers |
| Buy | Stock & Price |
GENERAL DESCRIPTION
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. The LM3753 Tracking is always enabled, so the output is controlled both up and down. The Soft-Start function on the LM3754 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 LLP package with a thermal pad.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 Trackin...
