product brief CP2128 dc/dc series regulated charge pump dc/dc converters CP2128_pb_eng_rev1.0 march,2005 copyright ?2005 chiphomer technology limited page 1 of 1 overview the CP2128 are low noise, constant frequency switched capacitor voltage doublers. they produce regulated output voltage from a 2.7v to 4.5v input with up to 100ma of output current. low external parts count make the CP2128 ideally suited for small, battery-powered application. a new charge-pump architecture maintains constant switching frequency to zero load and reduces both output and input ripple. the CP2128 have thermal shutdown capability and can survive a continuous short circuit from vout to gnd. high switching frequency enables the use of small ceramic capacitors. features low noise constant frequency operation output current:100ma 2mhz switching frequency fixed 5v 4% output vin range: 2.7v to 4.5v automatic soft-start reduces inrush current no inductors icc<1ua in shutdown sot23-6l -40 85 - + 1 vout 5 vin 2 gnd 6 c+ 4 c- charge pump 2mhz oscilator soft start & switch control 3 shdn
product brief CP2128 dc/dc series regulated charge pump dc/dc converters CP2128_pb_eng_rev1.0 march,2005 copyright ?2005 chiphomer technology limited page 2 of 2 applications cellular phones digital cameras mp3 players pdas, handheld computers gps receivers typical application CP2128 c- c+ gnd 1uf 1uf shdn vin vout 1uf ? 100 ? ? ? 100 ? 100 related products cp2126: step up white led driver, switches at 900khz, can drive two to four leds in series. cp2127: step up white led driver, switches at 1200khz, can drive two to four leds in series. chiphomer technology limited add: 4f, building d, 1618 yishan road, shanghai, p.r.c. tel: +86-(0)21-64058488, 64014543 fax: +86-(0)21-64050030 email: sales@chiphomer.com web: www.chiphomer.com
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