Texas InstrumentsLM2744EVALCartes et kits de développement de gestion de la puissance

The demo board contains a voltage-mode, high-speed synchronous buck regulator controller with an external adjustable reference voltage between 0.5V and 1.5V. The demo board design incorporates the LM4140 high precision low noise reference IC providing 1.0V to the reference pin (VREF). Though the control sections of the IC are rated for 3 to 6V (VCC), the driver sections are designed to accept input supply rails (VIN) as high as 14V. It operates at a fixed-frequency, adjustable from 50 kHz to 1 MHz with one external resistor.

The demo board design regulates to an output voltage of 1.2V at 3.5A with a switching frequency of 1MHz. Note, the demo board is optimized for a 1MHz, 14V input voltage compensation design; if another switching frequency and input voltage is desired, please consult the LM2744 data sheet for control loop compensation procedures. For additional design modifications refer to the Design Consideration section of the LM2744 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller with External Reference SNVS292