wm8325gefl/v Wolfson Microelectronics plc, wm8325gefl/v Datasheet

wm8325gefl/v

Manufacturer Part Number

wm8325gefl/v

Description

Processor Power Management Subsystem

Manufacturer

Wolfson Microelectronics plc

Datasheet

1.WM8325GEFLV.pdf (20 pages)

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DESCRIPTION

The WM8325 is an integrated power-management subsystem

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

for power management. It is specifically targeted at the

requirements of a range of low-power portable consumer

products, but is suitable to any application with a multimedia

processor. The WM8325 is designed to operate as a system

PMIC supporting the ARM9™, ARM11™ and ARM Cortex-A™

processors, but is also capable of supporting the majority of

application and mobile processors at the heart of a wide range

of low-power consumer multimedia applications.

The

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. The InstantConfig™ interface

enables an external EEPROM to configure the WM8325.

The WM8325 power management subsystem comprises four

programmable DC-DC converters and eleven LDO regulators

(four of which are 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.

The DC-DC converters deliver high performance and high

efficiency across a wide range of operating conditions. They

are optimised to support the high load current transients seen

in modern processor core domains. DC-DC3 / DC-DC4 can be

connected together and operated in ‘dual’ mode to support an

increased current load of up to 1.6A.

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 ‘Alive’ processor power domains

external to the WM8325.

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.

WM8325 includes a crystal oscillator and an internal RC

oscillator 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 WM8325 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 <7uA,

making it particularly suitable for portable applications.

The WM8325 is supplied in an 8x8mm 81-lead QFN package,

ideal for use in portable systems. The WM8325 forms part of

the Wolfson series of audio and power management solutions,

and is widely register compatible with the WM831X family of

PMIC devices.

WOLFSON MICROELECTRONICS plc

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start-up

behaviour

Processor Power Management Subsystem

and

configuration

http://www.wolfsonmicro.com/enews

fully

FEATURES

Power Management

•

System Control

•

Additional Features

•

Package Options

•

APPLICATIONS

•

1 x DC-DC synchronous buck converter

(0.6V - 1.8V, 2.5A, DVS)

1 x DC-DC synchronous buck converter

(0.6V - 1.8V, 1.25A, DVS)

2 x DC-DC synchronous buck converters

(0.85V - 3.4V, 1A)

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

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

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

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

2 x Low-noise LDO regulators (1.0V - 3.5V, 150mA, 2Ω)

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

Comprehensive interrupt scheme

Watchdog timer and system reset control

Autonomous power sequencing and fault detection

OTP memory bootstrap configuration function

Auxiliary ADC for multi-function analogue measurement

128-bit pseudo-random unique ID

Secure Real-Time Clock with wake-up alarm

12 x configurable multi-function (GPIO) pins

Comprehensive clocking scheme: low-power 32kHz RTC

crystal oscillator, GPIO clock output and 4MHz RC clock

for power management

System LED outputs indicating device power state, and

fault status

8 x 8 x 0.85mm, 81-lead QFN package

Cellular Handsets

Smartphones

Electronic Books

Portable Media Players

Mobile Internet Devices

Electronic Gaming Devices

Netbooks

Smartbooks

Set Top Box

Digital Picture Frames

C or SPI compatible primary control interface

Product Brief, February 2011, Rev 1.4

WM8325

Related parts for wm8325gefl/v

wm8325gefl/v Summary of contents

Page 1

... Smartphones • Electronic Books • Portable Media Players • Mobile Internet Devices • Electronic Gaming Devices • Netbooks • Smartbooks • Set Top Box • Digital Picture Frames http://www.wolfsonmicro.com/enews WM8325 Product Brief, February 2011, Rev 1.4 Copyright ©2011 Wolfson Microelectronics plc ...

Page 2

WM8325 BLOCK DIAGRAM w Product Preview Product Brief, February 2011, Rev 1.4 2 ...

Page 3

Product Preview TYPICAL APPLICATIONS The WM8325 is designed as a system PMIC device that generates configurable DC supplies to power processors and associated peripherals within a system. The WM8325 provides four DC-DC synchronous buck (step-down) converters. Two of these can ...

Page 4

WM8325 DESCRIPTION ....................................................................................................... 1 FEATURES............................................................................................................. 1 APPLICATIONS ..................................................................................................... 1 BLOCK DIAGRAM ................................................................................................. 2 TYPICAL APPLICATIONS ..................................................................................... 3 TABLE OF CONTENTS ......................................................................................... 4 PIN CONFIGURATION ........................................................................................... 5 ORDERING INFORMATION .................................................................................. 5 PIN DESCRIPTION ................................................................................................ 6 ABSOLUTE MAXIMUM RATINGS ......................................................................... 9 RECOMMENDED ...

Page 5

... ORDERING INFORMATION ORDER CODE OTP WM8325GEFL/V Unprogrammed WM8325GEFL/RV Unprogrammed WM8325GEFLxxx/RV* Custom Note: Reel quantity = 2200 * xxx = Unique OTP part number ** Custom OTP minimum order quantity 22,000 EGP (Exposed Ground Paddle) ...

Page 6

WM8325 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 WM8325. PIN NAME Clocking and ...

Page 7

Product Preview PIN NAME Y10 SCLK2 W10 SDA2 B11 DBVDD1 F1 DBVDD2 OTP Memory Y3 PROGVDD DC-DC Converters and LDO Regulators B7 DC1GND A8 DC1FB Analogue Input A7 DC1LX Analogue I/O B8 DC1VDD B6 DC2GND A5 DC2FB Analogue Input A6 ...

Page 8

WM8325 PIN NAME Voltage and Current References W8 VREFC Analogue I/O Y9 IREFR Analogue I/O System LED Drivers U3 LED1 Digital Output U2 LED2 Digital Output System Power U1 PVDD1 Y7 PVDD2 V4 PVDD3 W12 BACKUPVDD Exposed EGP Analogue Ground ...

Page 9

Product Preview ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical ...

Page 10

WM8325 FEATURES OVERVIEW POWER MANAGEMENT FUNCTIONS INPUT DESCRIPTION VOLTAGE VOLTAGE DC-DC1, DC-DC2 0.6V to 1.8V PVDD (BuckWise™ Step- (12.5mV steps) down converters) DC-DC3, DC-DC4 0.85V to 3.4V PVDD (Step-down (25mV steps) converters) 0.9V to 3.3V 1.5V to LDO1 PVDD (50/100mV ...

Page 11

Product Preview The WM8325 provides 4 DC-DC Converters and 11 LDO Regulators. The DC-DC Converters include 2 BuckWise™ valley-mode converters. The Regulators comprise general purpose LDOs (LDO1 - LDO6) and low-noise analogue LDOs (LDO7 - LDO10). The analogue LDOs offer ...

Page 12

WM8325 3. 1.2V OUT I = 10mA to 1.2A OUT 0.01A to 1.2A OUT OUT . Figure 1 BuckWise™ Load Transient Response Note: C ...

Page 13

Product Preview For production use, the WM8325 the on-chip non volatile memory is typically used, in which the essential parameters for starting up the device can be programmed. This allows the WM8325 to start up and shut down the system ...

Page 14

WM8325 Figure 2 Power States and Transitions State transitions to/from the NO POWER state are controlled automatically by the internal supply (VPMIC) voltage generated by LDO12. The device is in the NO POWER state when this voltage is below the ...

Page 15

Product Preview BACKUP DOMAIN FOR RTC AND SYSTEM CONFIGURATION RETENTION • Clocked Backup state quiescent current of 2μA with Real Time Clock (RTC) running • Unclocked Backup state quiescent current of 100nA with RTC paused • minutes ...

Page 16

WM8325 SYSTEM CONTROL AND SUPERVISION 2 • SPI compatible primary control interface • Output fault monitoring on all regulator outputs (overcurrent or undervoltage) with programmable fault action • Programmable system undervoltage (UV) level • Chip thermal monitor ...

Page 17

Product Preview TYPICAL CONNECTIONS CPU ARM Core LDO11VOUT CPU ALIVE LDO10VOUT CPU_PLL LDO9VOUT WiFi LDO8VOUT HD Radio RF HD Radio Core LDO7VOUT LDO6VOUT Mobile TV LDO5VOUT CPU_IO_Block LDO4VOUT CPU_DAC LDO3VOUT CPU_ADC LDO2VOUT CPU_RTC LDO1VOUT CPU_OTG GPIO12 External voltage GPIO11 measurement ...

Page 18

WM8325 PACKAGE DIAGRAM FL: 81 PIN QFN PLASTIC PACKAGE 8 D2 eee 3.675 A11 A10 3.175 B10 B9 B8 B11 2.675 D3 D2 DETAIL B 2.025 DETAIL C F3 ...

Page 19

... Product Preview 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 ...

Page 20

WM8325 REVISION HISTORY DATE REV ORIGINATOR 05/10/10 1 CHANGES Updated DC-DC efficiency in Power Management summary CLKIN renamed as TEST Product Preview Product Brief, February 2011, Rev 1.4 20 ...

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