SY21712VDC

• Wide Input Voltage Range:

----3.6V to 16V if VCC is Supplied by Internal LDO

----2.7V to 16V if VCC is Supplied by External 3.3V DC Source

• Low R_DS(ON) for Internal Switches (Top/Bottom): 12.6mΩ/4.3mΩ
• 0.6V ±1% Voltage Reference Over Temperature Range (T_J = -40°C to 125°C)
• Adopt Constant-on-time Architecture and Frequency Lock Loop
• Instant PWM Architecture to Achieve Fast Transient Response
• 600kHz, 800kHz and 1000kHz Switching Frequency Operation Selected by MODE Pin
• PFM/FCCM Light Load Operation Mode Selected by MODE Pin
• Programmable Bottom Valley Limit by ILMT Pin
• Reliable Protection Mode: Auto-Recovery Mode for UVP, UVLO, OTP and OVP
• Cycle-by-cycle Valley Current Limit and Peak Current Limit
• Cycle-by-cycle Reverse Current Limit
• Internal Soft-start Limits the Inrush Current
• Programmable Soft-start Time by SS Pin
• Smooth Soft-start with Output Pre-biased Function
• Adjustable Input Voltage UVLO by EN Pin
• Power Good Indicator
• Differential Output Voltage Remote Sense
• Output Discharge Function
• RoHS Compliant and Halogen Free
• Compact Package: QFN3×4-19

The SY21712 develops a high efficiency synchronous step-down DC/DC regulator capable of delivering 12A current. The device integrates high-side power switch and low-side synchronous rectifier with very low RDS(ON) to minimize the conduction loss. It provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (V_REF) over T_J= -40°C to 125°C.

The SY21712 operates over a wide input voltage range from 2.7V to 16V. The DC/DC regulator adopts the instant PWM architecture to achieve fast transient responses for high step down applications. Cycle-by-cycle current limit, hiccup over current protection and thermal shutdown protect the device during an over current condition