900844 Datasheet, PDF (28/118 Pages) Freescale Semiconductor, Inc – Integrated Power Management IC for Ultra-mobile and Embedded Applications

FUNCTIONAL DESCRIPTION
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
GENERAL DESCRIPTION
The 900844 is a high efficiency Power Management Integrated Circuit (PMIC). It is optimized for Ultra-mobile platforms for
Netbook, Tablets, Slates, embedded devices, and other applications requiring “multi-cell” battery voltage.
The 900844 PMIC, is designed to provide CPU power requirements and control as an integral part of Freescale's power
management solution to meet the needs of Ultra-mobile platforms.
Optimum partitioning, high feature integration, and state of the art technology, enable Freescale to support Ultra-mobile
platforms that are cost effective, by reducing component count and board area. The Freescale solution also allows ease of
system design, resulting in a faster time to market development cycle.
It accepts input from a supply in the range of 3.0 to 4.4 V (for example, from a multi-cell battery scaled down to 3.3 V) to deliver
regulated power to various components (CPU, chip sets, wireless, memory, storage, display, sensors, and others) on Ultra-
mobile platforms.
5 x DC/DC
multi-mode
SWITCHERS
2 x VID
4.0 MHz Switching
Core, I/O, MEM
14 x LDO
REGULATORS
+1 x Power Switch
Low Noise
High Performance
22 Channel 10 bit ADC
PMIC Temp Monitoring
4-Wire Resistive Touch Screen
Select Rails Current Monitoring
General Purpose Inputs
RTC 32.768 kHz
Xtal Oscillator
Control Interface
8 Interrupt Capable GPIOs
SPI Interface + Status and Control Inputs / Outputs
Freescale’s
PMIC Platform
Solution
Power
Control
Logic
State Machine
Figure 4. Power Management Solution - High Level Block Diagram
FEATURE LIST
• Netbook, Tablets, and embedded devices, Ultra-mobile platform Architecture Support
• Fully Programmable DC/DC Switching, Low Drop-Out Regulators, and Load Switches
• Delivers regulated reliable power to various system components
• High efficiency multi mode power conversion ensuring extended battery life
• Fully programmable with extensive protection features and complete fault reporting for best in class overall system reliability
• Internal Compensation
• 5 Buck DC/DC Regulators
- 2x VID Controlled with 1.0 MHz switching and external switches for CPU and Graphics core support
- 3x with 4.0 MHz switching and integrated MOSFET for platform support and LDO supply for optimized thermal
performance and power efficiency.
• 14 Low Dropout (LDO) regulators.
• One configurable LDO/Switch regulator for SDIO card support
• A 3.3 V load switch for platform support
• Coin Cell Backup battery charger
• SPI communication interface (up to 25 MHz operation)
• 22 channel (32 capable) 10-bit ADC for internal and external sensing with touch screen interface
• Low power 32.786 kHz XTAL oscillator.
• Real Time Clock (RTC) to provide time reference and alarm functions with wake up control.
• Eight Interrupt capable GPIOs and 8 GPOs
• Various control and status reporting I/Os
• Interrupt and Reset controller. All interrupt signals can be masked.
• Overall solution size target of < 400 mm² (including clearance and routing)
• Operating temperature of -40 to +85 °C
900844
28
Analog Integrated Circuit Device Data
Freescale Semiconductor