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. ACT8846 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 ? 2 x 150ma, 3 x 350ma ? three low-input voltage ldos ? 1 x 150ma, 2 x 350ma ? one low iq keep-alive ldo ? backup battery charger system control and interface ? four 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) ? e-books ? personal navigation devices ? smart phones general description the ACT8846 is a complete, cost effective, and highly-efficient activepmu tm power management solution optimized for the power, voltage sequencing and control requirements of rockchip rk3066 application processor family. the ACT8846 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 processor. dynamic voltage scaling (dvs) is supported either by dedicated control pins, or through i2c interface to optimize the energy-per- task performance for the processor. this device also include eight low-noise ldos (up to 350ma per ldo), one always-on ldo and an integrated backup battery charger to provide a complete power system for the processor. 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 ACT8846 is available in a compact, pb-free and rohs-compliant tqfn66-48 package. product brief, 22-oct-12
ACT8846 product brief, 22-oct-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 1500ma reg2 step-down dc/dc 0.6v to 3.9v 2800ma reg3 step-down dc/dc 0.6v to 3.9v 2800ma reg4 step-down dc/dc 0.6v to 3.9v 1500ma reg5 low-noise ldo 0.6v to 3.9v 150ma reg6 low-noise ldo 0.6v to 3.9v 150ma 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 150ma 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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