• Input voltage range: 2.5V to 5.5V
• Input voltage range for LDOs : 1.8V to 5.5V
• 2 channels DCDC regulators and 3 channels LDO regulators
• 1A output current capability for each DC/DC regulator
• DC/DC regulators output voltage externally adjustable
• 2.2MHz switching frequency
• Power save mode at light load condition for higher efficiency
• Forced-PWM mode selection by Mode pin
• Total 38uA quiescent current for DC/DC regulators
• 400mA output current capability for LDO1
• 200mA output current capability for LDO2 and LDO3
• LDO1, LDO2 output voltage externally adjustable
• Fixed 1.5V output voltage for LDO3
• Hard short protection, thermal shut down protection
• RoHS Compliant and Halogen Free
• Compact package: QFN4x4-24

SY8631B is integrated Power Management IC for applications powered by one Li-ion or Li-Polymer cell which require multiple power rails. It integrates 2 step-down Buck regulators, 3 low dropout LDOs and 1 channel  output. The highly efficient, 2.2MHz step-down Buck regulators will target at providing the core voltage and I/O voltage in a processor based system. Each LDO operates with an input voltage range between 1.8V and 5.5V allowing them to be supplied from one of the step-down converters or directly from the Li-ion battery.

SY8631B operates over a wide input voltage range from 2.5V to 5.5V to optimize the device for 5V, 3.3V or Li-ion battery applications.