• High Integrated and High Efficiency
• Up to 1.25A Charge Current (68mΩ RSENSE)
• Up to 1.55A Charge Current (55mΩ RSENSE)
• Up to 18V Absolute Maximum Input Voltage
• 6V Maximum Operating Input Voltage
• Adaptive Input Current Limit
• ±5% Input Current Limit Accuracy@500mA
• ±0.5% Charge Voltage Accuracy
• ±3.5% Charge Current Accuracy when ICHG Higher than 550mA
• I2C Controls(up to 3.4Mbps)

-- Battery Charge Voltage (3.5V – 4.44V)
-- Battery Charge Current (550mA – 1.25A)
-- Termination Current (50mA – 400mA)
-- Battery Weak Voltage (3.4V – 3.7V)
-- Input Current Limit
-- VBUS Threshold for Adaptive Input Current
-- Low Charge Current Mode Enable and Disable
-- Termination Enable and Disable

• Integrated Loop Compensation
• Internal Soft-start
• Bad adapter Detection and Rejection
• 3MHz Frequency PWM
• Automatic High Impedance Mode for Low Power Consumption
• 5V, Boost Mode for USB OTG
• CSP1.93x2.05-20 Package
• Spread Spectrum Frequency Control for Improved EMI Performance

The SY20716 is a highly efficient, buck-mode switching charger designed for single-cell Li-ion and Li-polymer batteries. This device enables a comprehensive solution for portable devices by integrating essential components such as the blocking MOSFET, power MOSFETs, input current sensing circuits, and the charger controller. It is fully USB compliant, ensuring minimized charging times when powered via a USB port. Additionally, the SY20716 supports USB on-the-go (OTG) functionality through its built-in boost regulator.

The device employs three internal digital-to-analog converters (DACs) to set and regulate the battery voltage, battery charging current, and adapter input current limit. These parameters are programmable via I²C by the host controller. The SY20716 features an adaptive input current limit, which optimizes the charging current to reduce charging time while preventing overloading of the input source.

The SY20716 is available in a compact CSP 1.93mm x 2.05mm – 20 pin package.