• High Integrated and High Efficiency
• Up to 1.25A Charge Current (68mΩ RSEN)
• Up to 1.55A Charge Current (55mΩ RSEN)
• 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
• 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 Switching Frequency
• Automatical High Impedance Mode for Low Power Consumption
• 5V,1A Boost Mode for USB OTG
• CSP1.93x2.05-20 Package
• Spread Spectrum Control for Improved EMI Performance
• Factory Test-Mode for GSM Calibration without a Battery

The SY20716 is a high efficiency Buck mode switching charger for 1-cell Li-ion and Li-polymer battery. The SY20716 provides a high integrated solution for the portable device. It integrates the blocking FET, the power FETs, the input current sensing circuits and the charger controller. It is fully USB compliant to minimize the charge time when it is supplied from a USB port. The SY20716 also supports USB OTG with the integrated Boost regulator.

Three internal DACs are used as the reference of battery voltage, battery charge current and adapter input current limit, and programmed by host using I²C. The adaptive input current limit allows the maximum charge current to minimize the charge time and prevent input source overloading.

The SY20716 is available in CSP1.93x2.05-20 package to allow small PCB footprint.