WM8310 w Processor Power Management Subsystem DESCRIPTION FEATURES Power Management The WM8310 is an integrated power-management subsystem which provides a cost-effective, flexible, single-chip solution for 2 x DC-DC synchronous buck converters power management. It is specifically targeted at the (0.6V - 1.8V, 1.2A, DVS) requirements of a range of low-power portable consumer 1 x DC-DC synchronous buck converter (0.85V - 3.4V, 1A) products, but is suitable to any application with a multimedia 1 x DC-DC boost converter (up to 30V, up to 90mA) processor. The WM8310 is designed to operate as a system 1 x LDO regulator (0.9V - 3.3V, 300mA, 1 ) PMIC supporting a variety of industry-standard processors and 2 x LDO regulators (0.9V - 3.3V, 200mA, 1 ) accessories in a wide range of consumer multimedia applications. 3 x LDO regulators (0.9V - 3.3V, 100mA, 2 ) 2 x Low-noise LDO regulators (1.0V - 3.5V, 200mA, 1 ) The start-up behaviour and configuration is fully programmable 2 x Low-noise LDO regulators (1.0V - 3.5V, 150mA, 2 ) in an integrated OTP non-volatile memory. This highly flexible solution helps reduce time-to-market, as changing application 1 x Alive LDO regulator (0.8V 1.55V, up to 25mA) requirements can be very easily accommodated in the OTP. Backlight LED Current Sinks The InstantConfig interface enables an external EEPROM to 2 x programmable constant current sinks, suitable for configure the WM8310. multi-LED display backlight control The WM8310 power management subsystem comprises of Battery Charger four programmable DC-DC converters, eleven LDO regulators Programmable single-cell lithium-ion / lithium-polymer (four of which are low-noise for supplying sensitive analogue battery charger (1A max charge current) subsystems). The integrated OTP bootstrap circuitry controls Battery monitoring for temperature and voltage the start-up sequencing and voltages of the converters and Autonomous backup battery charging and switching regulators as well as the sequencing of system clocks. System Control WM8310 can be powered from a battery, a wall adaptor or 2 I C or SPI compatible primary control interface from a USB power source. An on-chip regulator provides Interrupt based feedback communication scheme power for always-on PMIC functions such as register map and Watchdog timer and system reset control the RTC. The device provides autonomous backup battery switchover. A low-power LDO is included to support Alive Autonomous power sequencing and fault detection processor power domains external to the WM8310. Intelligent power path and power source selection OTP memory bootstrap configuration function A linear on-chip battery charger supports trickle charging and Additional Features constant current / constant voltage charging of single-cell lithium-ion / lithium-polymer batteries. The charge current, Auxiliary ADC for multi-function analogue measurement termination voltage, and charger time-out are programmable. 128-bit pseudo-random unique ID WM8310 detects and handles battery fault conditions with a Secure Real-Time Clock with wake-up alarm minimum of system software involvement. 12 x configurable multi-function (GPIO) pins A 12-bit Auxiliary ADC supports a wide range of applications Comprehensive clocking scheme: low-power 32kHz RTC for internal as well as external analogue sampling, such as crystal oscillator, Frequency Locked Loop, GPIO clock voltage detection and temperature measurement. output and 4MHz RC clock for power management System LED outputs indicating power state, battery WM8310 includes a crystal oscillator, an internal RC oscillator charger or fault status and Frequency Locked Loop (FLL) to generate clock signals for autonomous system start-up and processor clocking. A Selectable USB current limiting up to 1.8A (in accordance Secure Real-time Clock (S-RTC) and alarm function is with USB Battery Charging specification Rev 1.1) included, capable of system wake-up from low-power modes. Package Options A watchdog function is provided to ensure system integrity. 7x7mm, 169-ball BGA package, 0.5mm ball pitch To maximise battery life, highly-granular power management enables each function in the WM8310 subsystem to be APPLICATIONS independently powered down through a control interface or Portable Media Players alternatively through register and OTP-configurable GPIOs. Portable Navigation Devices The device offers a standby power consumption of <10uA, making it particularly suitable for portable applications. Cellular Handsets Electronic Books The WM8310 is supplied in a 7x7mm 169-ball BGA package, Electronic Gaming Devices ideal for use in portable systems. The WM8310 forms part of the Wolfson series of audio and power management solutions. Pre-Production, May 2012, Rev 3.1 WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at WM8310 Pre-Production BLOCK DIAGRAM DC-DC1 DC-DC2 DC-DC3 DC-DC4 GND DBVDD Instant- Buck Buck Buck Boost Interrupt and Primary Control Config 0.6 to 1.8V 0.6 to 1.8V 0.85 to 3.4V up to 30V, PVDD DBGND Reset Controller Interface EEPROM 1A up to 90mA 1.2A 1.2A PROGVDD Interface DVS DVS LED Sink ISINK1 System OTP NVM ISINK2 Register Map and Status Bootstrap LED1 ISINKGND Application Processor Config & LED2 LED Interface LDO1VDD LDO 1 Standard LDO Driver Unique ID 0.9 to 3.3V 300mA LDO1VOUT LDO2VDD GPIO1 LDO 2 Standard LDO GPIO2 0.9 to 3.3V 200mA LDO2VOUT 1 to 4MHz GPIO3 LDO3VDD RC LDO 3 Standard LDO GPIO4 Oscillator 0.9 to 3.3V 200mA LDO3VOUT Multi- GPIO5 Power WM8310 Function Pin GPIO6 LDO 4 Standard LDO LDO4VDD Management (GPIO) GPIO7 0.9 to 3.3V 100mA LDO4VOUT Control GPIO8 Controller PM Sub- LDO 5 Standard LDO LDO5VDD GPIO9 System 0.9 to 3.3V 100mA GPIO10 LDO5VOUT Monitoring GPIO11 LDO 6 Standard LDO LDO6VDD GPIO12 0.9 to 3.3V 100mA LDO6VOUT LDO 7 Analogue LDO AP Interface, GPIOs and PM Control LDO7VDD ON 1.0 to 3.5V 200mA LDO7VOUT LDO 8 Analogue LDO LDO8VDD 1.0 to 3.5V 200mA LDO8VOUT LDO 9 Analogue LDO LDO9VDD 1.0 to 3.5V 150mA LDO9VOUT LDO 10 Analogue LDO LDO10VDD 1.0 to 3.5V 150mA LDO10VOUT LDO 11 Alive LDO LDO11VOUT AUXADCIN1 0.8 to 1.55V 25mA Aux AUXADCIN2 LDO12VOUT LDO 12 Internal LDO ADC AUXADCIN3 2.1V 2mA (Backup Battery Connection) AUXADCIN4 LDO 13 Internal LDO LDO13VOUT 2.5V 20mA USBVMON Supply Voltage SYSVMON SYSVDD and Battery BATTVMON Monitor NTCBIAS USBVDD NTCMON Power Path WALLVDD Battery BATTVDD Management Charger Switching BATTFETENA 1A XTO Matrix 32.768kHz Real-Time Wake-Up WALLVDD Oscillator Clock Timer XTI WALLFETENA XOSCGND CLKOUT VREFC FLL IREFR References CLKIN REFGND Auxiliary Functions Power Management PP, May 2012, Rev 3.1 w 2 IRQ RESET CS SDA1 SCLK1 SDOUT1 CIFMODE SDA2 SCLK2 DC1GND DC1FB DC1LX DC1VDD DC2GND DC2FB DC2LX DC2VDD DC3GND DC3FB DC3LX DC3VDD DC4GND DC4FB DC4LX DC4VDD