• 2.5V to 5.5V Wide Input Voltage Range
• Single Output 4-Phase
• 5A per Phase, 4-Phase total 20A Output Current Capability
• Supports Phase Shedding
• I2C Programmable Output Voltages from 0.3V to 1.85V
• COT Control Achieves Fast Transient Performance
• ±0.7% Accuracy with Remote Sensing
• Light Load Mode Available
• Status Feedback with Interrupt Pin
• Reliable OTP/SCP/UVP/OVP Protection
• Compact Package: WLCSP 2.66x3.89-54

The SY21525A is a single output, synchronous quad-phase Buck converter. The SY21525A 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 is needed. 

The SY21525A 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 maximizes 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 inrush current.

The SY21525A 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 SY21525A also supports I2C communication protocol.

The part is available in a WLCSP 2.66x3.89-54 package. See Family Parts for more detailed information.