开关稳压器 For MAX17630A: 4.5V to 36V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter with 3.3V Output Voltage; For MAX17630B: 4.5V to 36V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter with 5V Output Voltage; For MAX17631A: 4.5V to 36V