Features: ` Linear Charger Management for Single Li-Ion or Li-Polymer Cells
` Dual Input Ports for Charging From USB or From Wall Plug, Handles 100-mA / 500-mA USB Requirements
` Charge Current Programmable via External Resistor
` 1-A, 95% Efficient Step-Down Converter for I/O and Peripheral Components (VMAIN)
`400-mA, 90% Efficient Step-Down Converter for Processor Core (VCORE)
` 2x 200-mA LDOs for I/O and Peripheral Components, LDO Enable via Bus
` Serial Interface Compatible With I2C, Supports 100-kHz, 400-kHz Operation
` LOW_PWR Pin to Lower or Disable Processor Core Supply Voltage in Deep Sleep Mode
` 70-A Quiescent Current
` 1% Reference Voltage
` Thermal Shutdown Protection
Application` All Single Li-Ion Cell-Operated Products Requiring Multiple Supplies Including:
PDA
Cellular/Smart Phone
Internet Audio Player
Digital Still Camera
` Digital Radio Player
` Split Supply DSP and P SolutionsPinout
Specifications
| |
UNIT |
| Input voltage on VAC pin with respect to AGND |
20 V |
| Input voltage range on all other pins except AGND/PGND pins with respect to AGND |
-0.3 V to 7 V |
| HBM and CBM capabilities at pins VIB, PG, and LED2 |
1 kV |
| Current at AC, VBAT, VINMAIN, L1, PGND1 |
1800 mA |
| Peak current at all other pins |
1000 mA |
| Continuous power dissipation |
See Dissipation Rating Table |
| Operating free-air temperature, TA |
-40°C to 85°C |
| Maximum junction temperature, TJ |
125°C |
| Storage temperature, Tstg |
-65°C to 150°C |
| Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
260°C |
DescriptionThe TPS65012 is an integrated power and battery management IC for applications powered by one Li-Ion or Li-Polymer cell and which require multiple power rails. The TPS65012 provides two highly efficient, step-down converters targeted at providing the core voltage and peripheral, I/O rails in a pro-cessor-based system. Both step-down converters en- ter a low power mode at light load for maximum efficiency across the widest possible range of load currents. The LOW_PWR pin allows the core con verter to lower its output voltage when the application processor goes into deep sleep. The TPS65012 also integrates two 200-mA LDO voltage regulators, which are enabled via the serial interface. Each LDO operates with an input voltage range between 1.8 V and 6.5 V, allowing them to be supplied from one of the step-down converters or directly from the battery.
The TPS65012 has a highly integrated and flexible Li-Ion linear charger and system power management.Imt aonffaegrseminetnetgrwaittehd aUuStoBn-opmorotuasnpdoawce-ra-dsoauprtecer ssueplepcly-tion, power FET and current sensor, high accuracy current and voltage regulation, charge status, and charge termination.
The TPS65012 charger automatically selects the USB port or the ac adapter as the power source for the system. In the USB configuration, the host can increase the charge current from the default value of maximum 100 mA to 500 mA via the interface. In the ac-adapter configuration, an external resistor sets the maximum value of charge current.
cTohnesbtaantttercyurisrecnht,aragnedd icnonthsrteaentphvaoslteasg:ec. oCndhiatirogneingis, normally terminated based on minimum current. An internal charge timer provides a safety backup for charge termination. The TPS65012 automatically restarts the charge if the battery voltage falls below an internal threshold. The charger automatically enters sleep mode when both supplies are removed.
TPS65012 Data Sheet
