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    SY5881 Sample Application
    General Description

    The SY5881 is a power management IC (PMIC) designed for notebook, desktop, and embedded computing platforms. 
    There are four DCDC converters and two linear regulators integrated into the SY5881, 
    which can minimize the need for external components so that it can ease the layout in a constrained PCB area. 
    The DCDC converters are of high accuracy, high efficiency, and high flexibility. Two LDOs provide power rails for peripherals and pull-up resistors.
    The SY5881 provides protection for a device when a fault occurs, such as overcurrent, output overvoltage, output undervoltage, short circuit, input overvoltage, and over temperature.
    The SY5881 is a halogen- and lead-free device, compliant with RoHS. The package is WLCSP-36 2.4x2.4.

    Features

    AVIN input supply range: 2.7V to 3.7V

    Four buck regulators: BUCK1,output range 1.7V ~ 2.9V; BUCK2,output range 0.9V ~ 2.0V; BUCK3,output range 0.5V ~ 1.3V; BUCK4,output range 0.675V ~ 2.0V

    2 linear regulators: LDO1, 1V ~ 2.7V, 50mV/Step, 0.4A; LDO2, 1V ~ 2.7V, 50mV/Step, 0.4A

    2 external converters

    DCDC voltage accuracy: ±1% FB Voltage

    PWM frequency adjustable:1Mhz~3Mhz,step 500Khz

    BUCK1 can be set as load switch

    BUCK4 can be set as linear regulator

    LDO1/LDO2 can be set as load switch

    Configurable Soft-start Time for All output

    Configurable power on sequence

    Configurable sleep and wake-up sequence

    I2C Interface 400kHz/1MHz/3.4MHz

    Built-in AVIN OV/UV warning indication and fault protection

    Built-in VOUT OVP/UVP/OCL

    Built-in Overd Temperature Protection

    Built-in EFUSE for configurable default value of registers

    8 multifunctional ioses

    Typical Application Circuit Diagram
    Applications

    Solid-state drive

    Video system

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