The SY20372 is a high-frequency synchronous step- down DC-DC regulator capable of delivering 20A continuous output current over the input range from 1.8V to 5.5V. The output voltage is adjustable from 0.4V to 1.5V.

It uses a proprietary ripple-based constant on-time architecture with frequency locked loop. The maximum operating frequency is 10MHz. The SY20372 can achieve very high loop bandwidth to support fast load transient response within ~50ns.

The operating frequency is selectable through I2C from 3.3MHz, 5MHz or 10MHz. The high switching frequency provides very compact solution size with small inductor and capacitors. The internal voltage reference provides ±1% accuracy over full junction temperature from -40°C to 125°C. The differential sense pins allow output feedback remote sensing.

The SY20372 supports forced PWM mode and automatic PWM/PFM mode, cycle-by-cycle current limit, internal soft-start, input under-voltage lock-out, output under/over voltage protection, output short circuit protection and thermal shutdown. The device provides safe operation under all conditions.

The SY20372 is available in a compact QFN3mm×4mm-16 package.