- 1 - www.active-semi.com i 2 c tm is a trademark of nxp. copyright ? 2012 active-semi, inc. innovative power tm activepmu tm and activepath tm are trademarks of active-semi. ACT8942 advanced pmu for amlogi c aml8726-m3 processor features ? three step-down dc/dc converters ? four low-dropout linear regulators ? integrated activepath tm charger ? i 2 c tm serial interface ? advanced enable/disable sequencing controller ? minimal external components ? tiny 55mm tqfn55-40 package ? 0.75mm package height ? pb-free and rohs compliant general description the ACT8942 is a complete, cost effective, highly- efficient activepmu tm power management solution, optimized for the unique power, voltage- sequencing, and control requirements of the amlogic aml8726-m3 processor. it is ideal for a wide range of high performance portable handheld applications such as tablet or pad devices. this device integrates the activepath tm complete battery charging and management system with seven power supply channels. this device features three step-down dc/dc converters and four low-noise, low-dropout linear regulators, along with a complete battery charging solution featuring the advanced activepath tm system-power selection function. the three dc/dc converters utilize a high- efficiency, fixed-frequency (2mhz), current-mode pwm control architecture that requires a minimum number of external components. two dc/dcs are capable of supplying up to 1150ma of output current, while the third supports up to 1300ma. all four low-dropout linear regulators are high- performance, low-noise regul ators that supply up to 80ma, 320ma, 320ma, 320ma, respectively. the ACT8942 is available in a compact, pb-free and rohs-compliant tqfn55-40 package. typical application diagram product brief, 05-dec-12
ACT8942 product brief, 05-dec-12 - 2 - www.active-semi.com i 2 c tm is a trademark of nxp. copyright ? 2012 active-semi, inc. innovative power tm activepmu tm and activepath tm are trademarks of active-semi. functional block diagram reg6 ldo reg7 ldo charge control chgin bat current sense voltage sense 4.35v to 6v ac adaptor usb li + battery body switch sda activepath control system supply vsys body switch 2.85v pre- condition 110c thermal regulation vp2 gp12 sw2 out2 out2 vp1 gp12 sw1 out1 out1 to vsys (optional) th out7 out6 reg5 ldo out5 out7 out6 out5 system control nirq reg4 ldo out4 out4 inl refbp reference acin iset vp3 gp3 sw3 out3 out3 + chglev ga ep nstat charge status vsys to vsys to vsys to vsys npbstat pwrhld pwren scl nrsto vsel nlbo 1.2v - + lbi out4 bat 102a out4 out4 out4 npbin push button vsys ACT8942 product options block function output voltage capability reg1 step-down dc/dc 0.6v to 3.9v 1150ma reg2 step-down dc/dc 0.6v to 3.9v 1150ma reg3 step-down dc/dc 0.6v to 3.9v 1300ma reg4 ldo 0.6v to 3.9v 80ma reg5 ldo 0.6v to 3.9v 320ma reg6 ldo 0.6v to 3.9v 320ma reg7 ldo 0.6v to 3.9v 320ma
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