• Low RDS(ON) for internal switches 

    -- Input Reverse Blocking Switch: 24 mΩ (Typical)

    -- High-side and Low-side Switches of Bi-directional Dc-Dc Regulator: 70 mΩ /70 mΩ (Typical)

    -- Disconnect Switch: 40 mΩ (Typical)

• 2.6V-16V Input Voltage Range with Maximum 36V Storage Voltage

• IN/BUS/STR Voltage and Input Current ADC

• Programmable Input Current Limit from 1.2A to 6.2A

• Selectable Over Voltage Protection: 3.8V, 5.7V, and 14.05V

• Input Power Source Detection to guarantee boost working under stable input condition

• Reverse Blocking at Input Side to Prevent from Leakage Current 

• BUS Auto-discharge Function

• Programmable Reverse Blocking Switch Turn On Delay Time and Soft-start Time

• Integrated High-efficiency Bi-directional Dc-Dc Regulator: 

    -- Programmable Boost Charging Peak Current

    -- Programmable Quasi-Fixed Frequency Constant Off Time Control for Steady-State Operation

    -- Selectable Boost CV Mode and Burst Mode

    -- STR Pin Open Detection in Burst Mode

    -- Programmable Boost Soft Start Time 

    -- Programmable Storage Voltage with flexible OVP Threshold

    -- Selectable Pulse Pre-charge Current for super capacitor Application

• MTP (Multi-Times Programming) Available for Control Parameters Programming by I2C

• Short-circuit Protection at Energy Storage Side

• Storage Capacitance Measurement

• Independent Load Switch Enable Control Pin

• RoHS Compliant and Halogen Free

• Compact package: QFN4×4-25

SY72025B is a power management IC for the applications of power backup in Solid-State Driver or other backup power supplies which can achieve backup power storage and release functions. The energy is transferred bi-directionally between the BUS side and the energy storage side with high efficiency by bi-directional DC/DC regulator. Fast transient response and excellent stability are achieved by the quasi-fixed frequency constant off time control strategy. 

A reverse blocking switch is integrated at the input side to prevent from energy leaking when the input power source is removed. The reverse blocking switch also has the programmable current limit function with the program range from 1.2A to 6.2A. Three different BUS over voltage protection (OVP) thresholds are selectable by OVP pin for the applications with different kind of input power source.

I2C interface is internally integrated in SY72025B to reduce the amount of external components. Control parameters such as input current limit, switching frequency, and boost peak current limit can be programmed by I2C.

Storage capacitance measurement is integrated inside of SY72025B. The measurement results are stored in internal read only data registers for MCU reading by I2C interface.

SY72025B along with QFN4×4-25 package provides compact PCB layout to save circuit area for the increase of SSD memory capacity.