LM21305 5A Synchronous Buck Regulators

Texas Instruments LM21305 5A Adjustable Frequency Synchronous Buck Regulators are optimized for solution size, flexibility, and high conversion efficiency. High power density LM21305 designs are achieved via monolithic integration of the high-side and low-side power MOSFETs, high switching frequency, current-mode control, and optimized thermal design. The efficiency of National LM21305 buck regulators is elevated at light loads with diode emulation mode operation and at heavy loads by optimal design of the MOSFET gate drivers to minimize switch dead-times and body-diode conduction losses. TI LM21305 synchronous buck regulators accept a wide input voltage range of 3V to 18V, facilitating interface to all intermediate bus voltages, including 3.3V, 5V, and 12V rails. An output voltage as low as 0.598V is supported with excellent setpoint accuracy and low ripple and RMS noise.