WM8311 Wolfson Microelectronics plc, WM8311 Datasheet

WM8311

Manufacturer Part Number

WM8311

Description

Processor Power Management Subsystem

Manufacturer

Wolfson Microelectronics plc

Datasheet

1.WM8311.pdf (10 pages)

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DESCRIPTION

WM8311 is an integrated power-management subsystem

which provides a cost-effective, flexible, single-chip solution for

power management, specifically targeted at the requirements

of a range of low-power portable applications. WM8311 is

specifically designed to operate as a system PMIC supporting

a variety of industry standard processors and accessories in a

wide range of applications.

The start-up behaviour and configuration is fully programmable

in an integrated OTP non-volatile memory. This highly flexible

solution helps reduce time-to-market, as changing application

requirements can be very easily accommodated in the OTP

contents.

The WM8311 power management subsystem comprises of

four programmable DC-DC converters, seven LDO regulators

(one of which is low-noise for supplying sensitive analogue

subsystems). The integrated OTP bootstrap circuitry controls

the start-up sequencing and voltages of the converters and

regulators as well as the sequencing of system clocks.

WM8311 can be powered from a battery, a wall adaptor or

from a USB power source. An on-chip regulator provides

power for always-on PMIC functions such as register map and

the RTC. The device provides autonomous backup battery

switchover. A low-power LDO is included to support ‘always-

on’ processor power domains external to the WM8311.

A linear on-chip battery charger supports trickle charging and

constant current / constant voltage charging of single-cell

lithium-ion / lithium-polymer batteries. The charge current,

termination voltage, and charger time-out are programmable.

WM8311 detects and handles battery fault conditions with a

minimum of system software involvement.

A 12-bit Auxiliary ADC supports a wide range of applications

for internal as well as external analogue sampling, such as

voltage detection and temperature measurement. The Touch

Panel controller uses the same ADC on an interleaved basis.

WM8311 includes a crystal oscillator, an internal RC oscillator

and Frequency Locked Loop (FLL) to generate all clock signals

for autonomous system start-up and processor clocking. A

Secure Real-time Clock (S-RTC) and alarm function is

included, capable of waking up the system from low-power

modes. A watchdog function is provided to ensure system

integrity.

To maximise battery life, highly-granular power management

enables each function in the WM8311 subsystem to be

independently powered down through a control interface or

alternatively through register and OTP-configurable GPIOs.

The device offers a standby power consumption of <10uA,

making it particularly suitable for portable applications.

The WM8311 is supplied in a 8x8mm 121-ball BGA package,

ideal for use in portable systems. The WM8311 forms part of

the Wolfson series of audio and power management solutions.

WOLFSON MICROELECTRONICS plc

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FEATURES

Power Management

•

Backlight LED Current Sinks

•

Battery Charger

•

System Control

•

Additional Features

•

Package Options

•

APPLICATIONS

•

2 x DC-DC synch. buck converter (0.6V - 1.8V, 1.2A, DVS)

1 x DC-DC synch. buck converter (0.85V - 3.4V, 1A)

1 x DC-DC boost converter (up to 30V, up to 170mA)

1 x LDO regulator (0.9V - 3.3V, 300mA, 1Ω)

2 x LDO regulators (0.9V - 3.3V, 200mA, 1Ω)

2 x LDO regulators (0.9V - 3.3V, 100mA, 2Ω)

1 x Low-noise LDO regulators (1.0V - 3.5V, 200mA, 1Ω)

1 x ‘always on’ regulator (0.8V – 1.55V, up to 10mA)

2 x programmable constant current sinks, suitable for

multi-LED display backlight control

Programmable single-cell lithium-ion / lithium-polymer

battery charger (1A max charge current)

Battery monitoring for temperature and voltage

Autonomous backup battery charging and switching

Interrupt based feedback communication scheme

Watchdog timer and system reset control

Autonomous power sequencing and fault detection

Intelligent power path and power source selection

OTP memory bootstrap configuration function

Auxiliary ADC for multi-function analogue measurement

Touch Panel interface controller (4-wire and 5-wire)

128-bit pseudo-random unique ID

Secure Real-time clock with wake-up alarm

16 x configurable multi-function (GPIO) pins

Comprehensive clocking scheme: low-power 32kHz RTC

crystal oscillator, Frequency Locked Loop, GPIO clock

output and 4MHz RC clock for power management

System LED outputs indicating power state, battery

charger or fault status

Selectable USB current limiting up to 1.8A (in accordance

with USB Battery Charging specification Rev 1.1)

8x8mm, 121-ball BGA package, 0.65mm ball pitch

Portable Media Players

Portable Navigation Devices

Cellular Handsets

Electronic Books

Electronic Gaming Devices

C or SPI compatible primary control interface

Product Brief, July 2009, Rev 1.0

WM8311

Related parts for WM8311

WM8311 Summary of contents

Page 1

... The device offers a standby power consumption of <10uA, making it particularly suitable for portable applications. The WM8311 is supplied in a 8x8mm 121-ball BGA package, ideal for use in portable systems. The WM8311 forms part of the Wolfson series of audio and power management solutions. WOLFSON MICROELECTRONICS plc ...

Page 2

... Auxiliary Functions w DC-DC1 Dynamic Buck Bootstrap 0.6 to 1.8V EEPROM Interface 1.2A Interface DVS OTP NVM Bootstrap Config & Unique 4MHz RC Oscillator Power WM8311 Management Control PM Sub- ` System Monitoring AP Interface, GPIOs and PM Control Aux ADC WALLVDD Battery Charger Real-Time Wake-Up Clock Timer Backup Battery Charger ...

Page 3

... USB and battery power sources according to the prevailing conditions. A backup battery supply is also supported in order to maintain the Real Time Clock (RTC) in the absence of any other supplies. The WM8311 provides a battery charger for the main battery aswell as the backup battery; these can be powered from either the wall adapter or USB supplies. ...

Page 4

... WALLVDD SYSVDD SYSVDD IREFR WALLFETE SYSVDD VREFC SYSVDD NA_N USBVDD SYSVDD BATTVDD USBVDD USBVDD USBVDD BATTVDD USBVDD 8x8 BGA - TOP VIEW (WM8311) PACKAGE ) A 121-ball (8 x 8mm) (Pb-free) 121-ball (8 x 8mm) (Pb-free, tape and reel DC1GND DC1LX DC1VDD DC1FB DC1GND ...

Page 5

... Product Brief PIN DESCRIPTION Notes: 1. Pins are sorted by functional groups. 2. The power domain associated with each pin is noted; VPMIC is the domain powered by LDO12 for the ‘always-on’ functions internal to the WM8311. PIN NAME Touch Panel and Auxiliary ADC F1, F2 USBVMON Analogue Input ...

Page 6

... WM8311 PIN NAME L2 CIFMODE Digital Input D5 SDOUT1 Digital Output C7 SCLK1 Digital Input C6 SDA1 C8 CS ¯¯ Digital Input G7 SCLK2 H8 SDA2 C11 DBVDD1 K3 DBVDD2 L3 DBGND OTP Memory C2 PROGVDD DC-DC Converters and LDO Regulators B11, C1, C4, D3, GND E8, L1, L10 A1 PVDD1 L8 PVDD2 A8, B8 DC1GND A11 ...

Page 7

... USBVDD or BATTVDD. Battery NTC Temperature Monitor Supply VPMIC Battery NTC Temperature Monitor Voltage Sense Input Supply Secondary (Backup) Battery Supply Status LED Driver 1. Open Drain Output SYSVDD Status LED Driver 2. Open Drain Output WM8311 DESCRIPTION Product Brief, July 2009, Rev 1.0 7 ...

Page 8

... MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag. MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag. The WM8311 has been classified as MSL3. CONDITION OTP Programming Supply (PROGVDD) ...

Page 9

... THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE. 8. FALLS WITHIN JEDEC, MO-195 w 8 1.17 mm BODY, 0.65 mm BALL PITCH X X DETAIL CORNER 0. 0.10 Z DETAIL 2 MAX NOTE 1.27 0.26 1.01 0.35 6 WM8311 DM065 TOP VIEW SOLDER BALL DETAIL 1 ccc ddd Z Product Brief, July 2009, Rev 1.0 9 ...

Page 10

... WM8311 IMPORTANT NOTICE Wolfson Microelectronics plc (“Wolfson”) products and services are sold subject to Wolfson’s terms and conditions of sale, delivery and payment supplied at the time of order acknowledgement. Wolfson warrants performance of its products to the specifications in effect at the date of shipment. Wolfson reserves the right to make changes to its products and specifications or to discontinue any product or service without notice ...

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