Demonstration circuit 2411A is a high efficiency synchronous buck regulator with a 3.1V to 20V input range. It can supply 20A maximum load current at 1.2V output. The demo board features the LTC7150S regulator. No external MOSFETs nor external current sense resistor are required. It uses a phase-lockable controlled on-time constant-frequency, current mode architecture, ideal for high step-down ratio applications. The operating frequency is programmable from 400kHz to 3MHz with an external resistor (R5). The LTC7150S is housed in a 6mm × 5mm × 1.3mm 42-Lead BGA package.