•   2.5V to 5.5V Wide Input Voltage Range
•   Quad Output 1+1+1+1
•   5A Per Phase Output Current Capability
•   Low IQ in Low Power Mode
•   COT Control Achieves Fast Transient Performance
•   I2C Programmable Output Voltages from 0.45V to 2.0V
•   ±0.7% System Accuracy with Remote Sensing
•   Independent Dynamic Voltage Scaling (DVS) for each Output
•   Support Start-up with Pre-bias Voltage
•   Status Feedback with Interrupt Pin
•   Reliable OTP/SCP/UVP/OVP Protection
•   Compact Package: WLCSP 2.66x3.89-54

The SY21525B is a high-efficiency, quad output, synchronous Buck regulator. The SY21525B features four integrated power stages and each phase has the capability to deliver up to 5A continuous output current. This flexibility allows the device to work for a wide range of applications where high-power and multi-output is needed.

The SY21525B operates over a wide input voltage range from 2.5V to 5.5V. This device adopts instant PWM control scheme to achieve fast transient response and loop stabilization. And seamless DCM/CCM transitions maximize efficiency at either heavy load or light load. During start-up and voltage change, the device controls the output slew rate to minimize output voltage overshoot and in-rush current.

The SY21525B supplies under voltage lockout, over voltage, over current and over temperature protection to ensure reliable operation of the system.

In addition to the standard interrupt, chip enable, and watchdog reset functions, the SY21525B also supports I²C communication protocol.

The part is available in a WLCSP 2.66x3.89-54 package.