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.（ 點擊即可咨詢芯片詳細信息）
-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, 1W)
-2 x LDO regulators (0.9V - 3.3V, 200mA, 1W)
-3 x LDO regulators (0.9V - 3.3V, 100mA, 2W)
-2 x Low-noise LDO regulators (1.0V - 3.5V, 200mA, 1W)
-2 x Low-noise LDO regulators (1.0V - 3.5V, 150mA, 2W)
-1 x ‘Alive’ regulator (0.8V – 1.55V, up to 25mA)
-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
-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
WM8326's Block Diagram
4.Portable Media Players
5.Mobile Internet Devices
6.Electronic Gaming Devices
9.Set Top Box
10.Digital Picture Frames
WM8326's Typical Application
The WM8326 is designed as a system PMIC device that generates configurable DC supplies to power processors and associated peripherals with in a system. The WM8326 provides four DC-DC synchronous buck (step-down) converters. Two of these can operate in dual mode, providing an increased current capability. Eleven LDO regulators provide a high degree of flexibility to provide power to multiple devices, with the capability to power-up and power-down different circuits independently.
Two of the DC-DC buck converters incorporate Wolfson’s BuckWiseTM technology specifically designed to handle rapid changes in load current; programmable slew rate DVS is also provided, as required by modern application processors. Selectable operating modes on all of the DC-DC converters allow each converter to be optimally configured for light, heavy or transient load conditions. Flexible operating configurations allow the converters to be tailored for minimum PCB area, maximum performance, or for maximum efficiency. The analogue LDOs provide low-noise outputs suitable for powering sensitive circuits such as RF / Wi-Fi / cellular handset applications.
The WM8326 powers up the converters and LDOs according to a programmable sequence. A configurable ‘SLEEP’ state is also available, providing support for an alternate configuration, typically for low-power / standby operation. The power control sequences and many other parameters can be stored in an integrated user-configurable OTP (One-Time Programmable) memory or may be loaded from an external memory. The WM8326 supports the programming and verification of the integrated OTP memory.
A backup battery supply can be connected to the WM8326 in order to maintain the Real Time Clock (RTC) in the absence of the primary supply.
Programmable GPIO pins may be configured as hardware inputs for general use or for selecting different power management configurations. As outputs, the GPIOs can provide indications of the device status, or may be used as control signals for other power management circuits. The WM8326 also provides two LED drivers, which can be controlled manually or configured as status indicators for the OTP memory programmer or operating power state.
WM8326's Ordering Information