ACT8848
Product Brief, 05-Dec-12
Advanced PMU for Multi-core Application Processors
FEATURES
INTEGRATED POWER SUPPLIES
GENERAL DESCRIPTION
The ACT8848 is a complete, cost effective, and
highly-efficient
ActivePMU
TM
power management
solution optimized for the power, voltage
sequencing and control requirements of Telechips
TCC88xx and Samsung S5PC210 application
processors. (Please see the ORDERING
INFORMATION section to get the
Full Part
Numbers.)
The ACT8848 features four fixed-frequency,
current-mode, synchronous PWM step-down
converters that achieve peak efficiencies of up to
97%. These regulators operate with a fixed
frequency of 2.25MHz, minimizing noise in sensitive
applications and allowing the use of small external
components. These buck regulators supply up to
2.8A of output current and can fully satisfy the
power and control requirements of the multi-core
application processors. Dynamic Voltage Scaling
(DVS) is supported either by dedicated control pins,
or through I2C interface to optimize the energy-per-
task performance for the processors. This device
also includes eight low-noise LDOs (up to 350mA
per LDO), one always-ON LDO and an integrated
backup battery charger to provide the complete
power system for the processors.
The power sequence and reset controller provides
power-on reset, SW-initiated reset, and power cycle
reset for the processor. It also features the
watchdog supervisory function. Multiple sleep
modes with autonomous sleep and wake-up
sequence control are supported.
The thermal management and protection
subsystem allows the host processor to manage the
power dissipation of the PMU and the overall
system dynamically. The PMU provides a thermal
warning to the host processor when the
temperature reaches a certain threshold such that
the system can turn off some of the non-essential
functions, reduce the clock frequency and etc to
manage the system temperature.
The ACT8848 is available in a compact, Pb-Free
and RoHS-compliant TQFN66-48 package.
•
Four DC/DC Step-Down (Buck) Regulators
−
2 x 2.8A, 2 x 1.5A
•
•
•
•
Five Low-Noise LDOs (350mA)
Three Low-Input Voltage LDOs (350mA)
One Low IQ Keep-Alive LDO
Backup Battery Charger
SYSTEM CONTROL AND INTERFACE
•
Six General Purpose I/O with PWM Drivers
•
I
2
C Serial Interface
•
Interrupt Controller
SYSTEM MANAGEMENT
•
Reset Interface and Sequencing Controller
−
Power on Reset
−
Soft / Hard Reset
−
Watchdog Supervision
−
Multiple Sleep Modes
•
Thermal Management Subsystem
APPLICATIONS
•
•
•
•
Tablet PC
Mobile Internet Devices (MID)
Ebooks
Personal Navigation Devices
Innovative Power
TM
ActivePMU
TM
is a trademark of Active-Semi.
I
2
C
TM
is a trademark of NXP.
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
