innovative power tm - 1 - www.active-semi.com copyright ? 2012 active-semi, inc. activepmu tm is a trademark of active-semi. i 2 c tm is a trademark of nxp. ACT8848 advanced pmu for multi-core application processors features integrated power supplies ? 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 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 cl ock frequency and etc to manage the system temperature. the ACT8848 is available in a compact, pb-free and rohs-compliant tqfn66-48 package. product brief, 05-dec-12
ACT8848 product brief, 05-dec-12 innovative power tm - 2 - www.active-semi.com copyright ? 2012 active-semi, inc. activepmu tm is a trademark of active-semi. i 2 c tm is a trademark of nxp. functional block diagram product options block function output voltage capability reg1 step-down dc/dc 0.6v to 3.9v 1.5a reg2 step-down dc/dc 0.6v to 3.9v 2.8a reg3 step-down dc/dc 0.6v to 3.9v 2.8a reg4 step-down dc/dc 0.6v to 3.9v 1.5a reg5 low-noise ldo 0.6v to 3.9v 350ma reg6 low-noise ldo 0.6v to 3.9v 350ma reg7 low-noise ldo 0.6v to 3.9v 350ma reg8 low-noise ldo 0.6v to 3.9v 350ma reg9 low-noise ldo 0.6v to 3.9v 350ma reg10 low input-voltage ldo 0.6v to 3.9v 350ma reg11 low input-voltage ldo 0.6v to 3.9v 350ma reg12 low input-voltage ldo 0.6v to 3.9v 350ma reg13 always-on ldo 0.6v to 3.9v 50ma
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