5. charge pump ics __________________________________________________________________________________ 52 xc9801 series step-up charge pump general description features the xc9801 series are step-up char g e pump ics which provide stable, hi g hl y efficient, positive volta g es with the onl y external components required bein g 2 capacitors. output volta g e is selectable in 0. 1v steps within a 2.5v ~ 5.2v ran g e and with output stabilised throu g h the control of the char g e pump's output impedance, ripple is minimal. control switches to pfm (pulse skip) durin g li g ht loads without affectin g output impedance or ripple so that the ic is protected against drops in efficiency. as well as the ultra small msop-8 package, the small con- sumption current and hi g h efficiencies of the series make the xc9801 suitable for use with all t y pes of batter y operated ap - plications. input voltage range: 1.8v ~ 5.5v output voltage range: 2.5v ~ 5.2v small input current: 80 a (no load) output current: 80ma (3.6v 5v step-up) oscillation frequency: 300khz stand-by current (ce 'l'): 2.0 a (max) can be used as a step-up doubler (sense = 0v) msop-8a package pin configuration pin assignment sense ce v in gnd v out c1+ c1- p g nd msop-8a (top view) pin number pin name function 1 sense output voltage monitor 2ce chip enable 3v in input (power supply) 4 gnd ground 5 pgnd power ground 6c1 - external capacitor - 7c1 + external capacitor + 8v out output block diagram v in ce c1+ c1- v out sense gnd pgnd chip enable oscillator vref controler p1 p2 p3 n4 n5 ordering information xc9801/02 ? ? ? ? ? ? designator description ? b true logic level at ce pin : positive ? ? 25~52 output voltage (2.5v ~ 5.2v) 5.0v ? =5, ? =0 ? 3 oscillator frequency : 300khz ? k package : msop-8a (1reel = 1000pcs) r embossed tape. standard feed ? l embossed tape. reverse feed
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