preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 pag e 1 of 9 high performance regulated charge pump general description the LP3110 is a high performance charge pump dc/dc converter that produces a regulated 5v output. no external inductor is required for operation. the operating voltage range is 2.6v to vout. internal soft-start circuitry effectively reduces the in-rush current both while start-up and mode change. the LP3110 features very low quiescent current, over current protection and short circuit protection. the LP3110 is available in sot-23-6 package. order information LP3110 - f: pb-free package type b6: sot23-6 applications ? lcd panel ? cellular and smart mobile phone ? pda/dsc ? flash led driver features ? 2x mode for ultra-high efficiency ? 2.8v to vout range input voltage ? soft start function ? built-in short-circuit protection ? 1.2mhz fixed frequency ? built-in thermal protection ? over current protection function ? i q <1ua in shutdown ? sot23-6 package ? rohs compliant and 100% lead (pb)-free typical application circuit 2.2uf vout_5v chip enable vin 1uf LP3110 2 3 5 6 1 4 gnd en vin c+ out c- 2.2uf marking information please see website.
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 2 of 9 functional pin description package type pin configurations sot23-6 pin name description 1 vout output voltage 2 gnd ground 3 en chip enable (active high) 4 cn flying capacitor negative terminal 5 vin power input voltage 6 cp flying capacitor positive terminal function block diagram absolute maximum ratings ? input voltage to gnd (v in) ------------------------------------------------------------------------------------ 6v ? en to gnd voltage (v en ) --------------------------------------------------------------------- 0.3v to v in +0.3v ? maximum dc output current(iout) ----------------------------------------------------------------------- 150ma ? operating junction temperature range (t j ) ---------------------------------------------------- 4 0 to 150 ? maximum soldering temperature (at leads, 1 0sec) ----------------------------------------------------- 260
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 3 of 9 electrical characteristics (over recommended operating conditions unless specified otherwise) v in =3.6v,en=high, t a =25 ) symbol parameter conditions LP3110 unit min. typ. max. v in input voltage 2.8 vout v v out output voltage range 5 v i q quiescent current n o load 150 450 a i shdn shutdown current en = gnd 1 5 a f osc oscillator frequency 0.8 1.2 1.4 mhz i sc output short circuit current limit vout<0.5v 250 350 400 ma v en(l) enable threshold low 0.4 v v en(h) enable threshold high 1.4 v i en input low current v in = v en = 5.5v -1 1 a
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 4 of 9 typical operating characteristics
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 5 of 9
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 6 of 9
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 7 of 9 application information 2.2uf 82r 82r chip enable vin 82r 1uf 82r 82r up to 6pcs white/blue led LP3110 2 3 5 6 1 4 gnd en vin c+ out c- 2.2uf 82r 10uf load 1uf 2.2uf up to 120ma vin LP3110 2 3 5 6 1 4 gnd en vin c+ out c- chip enable 10uf 1uf LP3110 2 3 5 6 1 4 gnd en vin c+ out c- vin 2.2uf vout_5v chip enable figure2: up to 6pcs white/blue led driver from li-ion battery source figure3: step-up to 5v with loading application from li-ion battery source figure4: step-up to 5v with lcd vbais application from li-ion battery source
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 p age 8 of 9 up to 150ma 2.2uf vin LP3110 2 3 5 6 1 4 gnd en vin c+ out c- flash wled driver 10uf 1uf 100r chip enable up to 350ma 10uf 1uf 10uf 1uf vin 2.2uf flash wled driver chip enable 100k 10r on/off 10r LP3110(b) 2 3 5 6 1 4 gnd en vin c+ out c- LP3110(a) 2 3 5 6 1 4 gnd en vin c+ out c- figure6: large current flash led driver from li-ion battery source
preliminary datasheet LP3110 LP3110 C ver. 1.1 datasheet feb.-2008 pag e 9 of 9 packaging information sot23-6 package
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