A 3V to 6V in, 6A out synchronous buck PWM integrated FET switcher design uses state-of-art power IC technology

摘要

A 3V to 6V input, 6A output synchronous buck PWM switcher with integrated FETs; TI code name SWIFT™ has been fabricated using a combination of past reported power IC technology. In this IC we extended a production 0.72μm technology with enhanced features and then combined mixed circuit design with integrated thin-gate oxide, planar, very-thin-resurf VTR LDMOS FETs. The Power IC uses plated CuNiPd top metal for low resistance busing and bonding over active area and is packaged in a thin line 28 pin TSSOP package having a POWERPAD™. The technology combination yields a state-of-art performance power IC. The device is capable of 95% efficiency and is excellent for point-of-load applications such as DSP solutions as well as high density distributed power systems. The key to high efficiency in this product is dual low Ron=30 mΩ fets, low gate charge losses, and low reverse recovery losses during power FET switching.