innovative power tm - 1 - www.active-semi.com copyright ? 2010 active-semi, inc. activepmu tm is trademark of active-semi. i 2 c tm is a trademark of nxp. product brief, 29-nov-10 ACT8890 advanced pmu for portable handheld equipment features ? three step-down dc/dc converters ? four low-dropout linear regulators ? i 2 c tm serial interface ? advanced enable/disable sequencing controller ? minimal external components ? tiny 55mm tqfn55-32 package ? 0.75mm package height ? pb-free and rohs compliant applications ? personal navigation devices ? portable media players ? tablet devices ? smart phones ? mids general description the ACT8890 is a complete, cost effective, highly- efficient activepmu tm power management solution, for portable handheld equipment such as smartphones, mobile internet devices (mid), ebooks and etc. this device features three step-down dc/dc converters and four low-noise, low-dropout linear regulators. 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, regulators that supply up to 320ma each. the ACT8890 is available in a compact, pb-free and rohs-compliant tqfn55-32 package. typical application diagram ?
ACT8890 product brief, 29-nov-10 ? innovative power tm - 2 - www.active-semi.com copyright ? 2010 active-semi, inc. reg6 ldo reg7 ldo ACT8890 sda vp2 gp2 sw2 out2 out2 vp1 gp1 sw1 out1 out1 to battery out7 out6 reg5 ldo out5 out7 out6 out5 system control reg4 ldo out4 out4 inl45 refbp reference vp3 gp3 sw3 out3 out3 ga ep to battery to battery to battery on6 scl serial interface nrsto out1 inl67 to battery on1 on2 on3 on45 on7 to battery vddref product options block function output voltage capability reg1 step-down dc/dc adjustable, or 0.6v to 3.9v 1150ma reg2 step-down dc/dc 1150ma reg3 step-down dc/dc 1300ma reg4 ldo 0.6v to 3.9v 320ma reg5 ldo 320ma reg6 ldo 320ma reg7 ldo 320ma functional block diagram
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