SY21525FVCS (SY70300FVCS)

Double Output PMIC Buck Converter

SY21525FVCS Double Output PMIC Buck Converter Datasheet

Parameters
Features
Description

Part number	SY21525FVCS
Vin (min) (V)	2.5
Vin (max) (V)	5.5
Channel(#)	3
Application	Optical module
Features	Integrated 4 power stages and three outputs with 2 phase + 1 phase + 1 phase,Each phase has the capability to deliver up to 5A output current,FPWM operation to reduce output ripple
Package	WLCSP2.66×3.89-54

• 2.5V to 5.5V Wide Input Voltage Range

• 2-phase and two 1-phase three-output (2+1+1)

• 5A per Phase Output Current Capability

• I2C Programmable Output Voltages from 0.3V to 1.85V or 0.45V to 2V

• COT Control Achieves Fast Transient Performance

• ±1.0% Accuracy with Remote Sensing

• Fixed-phase Configuration and Continuous Conduction Mode (FPCCM), OTP Programmable Light Load Mode(DCM/FPCCM)

• Supports Phase Shedding if Configured with DCM Mode by Factory OTP

• Supports Startup with Pre-Biased Output Voltage

• Status Feedback with Interrupt Pin

• Reliable OTP/SCP/UVP/OVP Protection

• Compact Package: WLCSP2.66×3.89-54

The SY21525J is a high-efficiency, 2-phase and two 1-phase three-output buck converter. It integrates four synchronous buck converters, each phase is capable of delivering up to 5A continuous output current.

The SY21525J operates over a wide input voltage range from 2.5V to 5.5V and uses instant PWM control for rapid transient response stable operation. Additionally, during startup and voltage adjustments, the device manages the output slew rate to minimize inrush current and output voltage overshoot.

The SY21525J provides undervoltage lockout (UVLO), along with overvoltage (OVP), overcurrent (OCP), and over temperature protections (OTP). In addition to the standard interrupt, chip enable, the SY21525E also supports I2C communication protocol.

The SY21525J is available in a compact WLCSP2.66× 3.89-54 package.

Evaluation Board

Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_SY21525FVCS

EVB File

The EVB_SY21525FVCS is intended for evaluating 2.5V to 5.5V double output PMIC.

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12