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PDF ( 数据手册 , 数据表 ) WM8326

零件编号 WM8326
描述 Processor Power Management Subsystem
制造商 Wolfson Microelectronics
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WM8326 数据手册, 描述, 功能
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WM8326
Processor Power Management Subsystem
DESCRIPTION
The WM8326 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 WM8326 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 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.
The InstantConfigTM interface enables an external EEPROM to
configure the WM8326.
The WM8326 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 WM8326.
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.
WM8326 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 WM8326 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 WM8326 is supplied in an 8x8mm 81-lead QFN package,
ideal for use in portable systems. The WM8326 forms part of
the Wolfson series of audio and power management solutions,
and is widely register compatible with the WM831X devices.
FEATURES
Power Management
2 x DC-DC synchronous buck converters
(0.6V - 1.8V, 2.5A, DVS)
2 x DC-DC synchronous buck converters
(0.85V - 3.4V, 1A)
1 x LDO regulator (0.9V - 3.3V, 300mA, 1)
2 x LDO regulators (0.9V - 3.3V, 200mA, 1)
3 x LDO regulators (0.9V - 3.3V, 100mA, 2)
2 x Low-noise LDO regulators (1.0V - 3.5V, 200mA, 1)
2 x Low-noise LDO regulators (1.0V - 3.5V, 150mA, 2)
1 x ‘Alive’ regulator (0.8V – 1.55V, up to 25mA)
System Control
I2C or SPI compatible primary control interface
Comprehensive interrupt scheme
Watchdog timer and system reset control
Autonomous power sequencing and fault detection
OTP memory bootstrap configuration function
Additional Features
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
Package Options
8 x 8 x 0.85mm, 81-lead QFN package
APPLICATIONS
Cellular Handsets
Smartphones
Electronic Books
Portable Media Players
Mobile Internet Devices
Electronic Gaming Devices
Netbooks
Smartbooks
Set Top Box
Digital Picture Frames
WOLFSON MICROELECTRONICS plc
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Production Data, June 2012, Rev 4.0
Copyright 2012 Wolfson Microelectronics plc







WM8326 pdf, 数据表
WM8326
1 PIN CONFIGURATION
Production Data
A1 A2 A3 A4 A5
A6
A7
A8 A9
A10
A11
B1 B2
C1
D1
E1
F1
G1
H1
J1
K1
L1
M1
B3
N1
P1
R1
B4 B5
B6 B7
EGP
(Exposed Ground Paddle)
B8
B9 B10
B11
D2 D3
F2 F3
H2 H3
K2 K3
M2 M3
N2 N3
R2 R3
T1 U1
U2 U3
V1 V2
V3 V4
W1 W2 W3
W4
W5 W6
W7
W8 W9
W10
W11
W12
Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 Y11 Y12
Top View – WM8326
2 ORDERING INFORMATION
ORDER CODE
OTP
TEMPERATURE
RANGE (TA)
WM8326GEFL/V
Unprogrammed -40C to +85C
WM8326GEFL/RV
Unprogrammed -40C to +85C
WM8326GEFLxxx/RV*
Custom
-40C to +85C
Note:
Reel quantity = 2200
* xxx = Unique OTP part number
** Custom OTP minimum order quantity 22,000.
PACKAGE
81-lead QFN (8 x 8mm)
(Pb-free)
81-lead QFN (8 x 8mm)
(Pb-free, tape and reel)
81-lead QFN (8 x 8mm)
(Pb-free, tape and reel) **
MOISTURE
SENSITIVITY
LEVEL
MSL3
PEAK
SOLDERING
TEMPERATURE
260C
MSL3
260C
MSL3
260C
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PD, June 2012, Rev 4.0
8







WM8326 equivalent, schematic
WM8326
Production Data
7 ELECTRICAL CHARACTERISTICS
7.1 DC-DC SYNCHRONOUS BUCK CONVERTERS
DC-DC1 and DC-DC2
Unless otherwise noted: VIN = 3.8V, VOUT = 1.2V, MODE = FCCM(1), TJ = -40°C to +125°C; typical values are at TJ = 25°C
PARAMETER SYMBOL
TEST CONDITIONS
MIN TYP MAX
UNIT
Input Voltage
Programmable
Output Voltage
VOUT Step Size
VOUT Accuracy
Undervoltage
margin
Overvoltage
margin
VIN
VOUT
VOUT_STEP
VOUT_ACC
VUV
VOV
FSW = 2MHz
FSW = 4MHz
VIN = 2.7V to 5.5V, IOUT = 0mA to 2500mA
0.6V VOUT < 0.9V
0.9V VOUT < 1.3V
1.3V VOUT 1.8V
0.6V VOUT 1.8V
2.7 5.5 V
0.6 1.8 V
0.6 1.4
12.5 mV
-2.5
+2.5
%
50 mV
80
100
100 mV
Output Current
IOUT FCCM(1) and Auto (CCM/DCM FSW = 2MHz
with PS(2)) Modes
FSW = 4MHz
Hysteretic Mode
0
0
0
2500
1250
150
mA
LDO Mode
0 10
P-channel
Current Limit
IP_LIM
3650
mA
Quiescent
Current
IQ IOUT = 0mA, FCCM(1) and Auto (CCM/DCM with
PS(2)) Modes (excluding switching losses)
585
A
Shutdown
Current
IOUT = 0mA, Hysteretic Mode
IOUT = 0mA, LDO Mode
ISD DCm_ENA = 0
100
25
0.01 A
P-channel
On Resistance
RDSP
VIN = VGS = 3.8V, IDCmLX = 100mA
115 m
N-channel
On Resistance
RDSN
VIN = VGS = 3.8V, IDCmLX = -100mA
105 m
Switching
Frequency
FSW DCm_FREQ = 01
DCm_FREQ = 10
2 MHz
4
Notes:
1. Forced Continuous Conduction Mode
2. Continuous / Discontinuous Conduction with Pulse-Skipping Mode
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PD, June 2012, Rev 4.0
16










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