The TPS65720 is a small power management unit targeted for Bluetooth headsets or other portable low power consumer end equipments. It contains an USB friendly Lithium-Ion battery charger, a high efficient step down converter, a low dropout linear regulator and additional supporting functions.
The device is controlled by an I2C interface. Several settings can be customized by the use of non volatile memory which is factory programmed. The 2.25MHz step-down converter enters a low power mode at light load for maximum efficiency across the widest possible range of load currents. For low noise applications the devices can be forced into fixed frequency PWM mode using the I2C compatible interface. The device allows the use of small inductors and capacitors to achieve a small solution size. TPS65720 provides an output current of up to 200mA on the DCDC converter. The TPS65720 also integrates one 200mA LDO. The LDO operates with an input voltage range between 1.8V and 5.6V allowing it to be supplied from the output of the step-down converter or directly from the system voltage.
The TPS65720 comes in a small 25-ball wafer chip scale package (WCSP) with 0,4mm ball pitch or a 4mm × 4mm QFN package with a 0,4mm pitch (TPS65721).
Features
- Battery Charger With Power Path Management
- 28 V Rated Power Path With:
- 100 mA Input Current Limit
- 500 mA input Current Limit
- 300 mA Charge Current
- 200 mA Step-Down Converter for TPS65720
- 400 mA Step-Down Converter for TPS65721
- Up to 92% Efficiency
- VIN Range for DCDC Converter From 2.3V to 5.6V
- 2.25 MHz Fixed Frequency Operation
- Power Save Mode at Light Load Current
- Output Voltage Accuracy in PWM Mode ±2%
- 100% Duty Cycle for Lowest Dropout
- 1 General Purpose 200mA LDO
- VIN Range for LDO From 1.8V to 5.6V
- I2C Compatible Interface
- 4GPIOs
- Available in a 25 Ball WCSP With 0,4mm Pitch and in 4mm × 4mm 32-Pin QFN Package
- APPLICATIONS
- Bluetooth Headsets
- Handheld Equipment
Fonte - Texas Instruments Inc
