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unisonic technologies co., ltd uc3383 cmos ic www.unisonic.com.tw 1 of 15 copyright ? 2010 unisonic technologies co., ltd. qw-r502-032,h pfm controlled, step-up dc/dc converters (variable duty ratio) ? description the utc uc3383 series are pfm step-up dc/dc switching converter. the utc uc3383 can support both large and small currents. it automatically switches duty ratio ( 45%/75%) when it senses changes in load. both built-in and external transistor types include 5-pin and 3-pin packages, which are provided with eith er a ce (chip enable) function that reduces power consumption dur ing shut-down mode, or a v dd pin function (separated power and voltage detect pins). ? features * output voltage range: 2. 0v~7.0v in 0.1v increments * operating (start-up) vo ltage range: 0.9v~10v * highly accurate: set-up voltage 2.5% * maximum oscillator frequency (max fosc1): 180khz (15%) * variable duty ra tio: 45%/75% (5%) * both switching transistor built-in and external types are available * 5-lead package offer chip enable or independent v out pin option. sot-89 sot-25 1 3 5 2 4 1 ? ordering information pin assignment ordering number package 1 2 3 4 5 packing UC3383G-XX-AB3-R sot-89 v ss v out lx - - tape reel uc3383g-xx-af5-r sot-25 ce v out nc v ss lx tape reel note: pin assignment: nc: no connection ce: chip enable xx: output voltage, refer to marking information.
uc3383 cmos ic unisonic technologies co., ltd 2 of 15 www.unisonic.com.tw qw-r502-032,h ? marking information package voltage code marking sot-25 sot-89 20:2.0v 25:2.5v 26:2.6v 27:2.7v 28:2.8v 30:3.0v 31:3.1v 32:3.2v 33:3.3v 36:3.6v 37:3.7v 40:4.0v 45:4.5v 50:5.0v ? pin description pin no. sot-25 sot-89 pin name function 1 - ce chip enable 2 2 v out output voltage monitor, ic internal power supply 3 - nc no connection 4 1 v ss ground 5 3 lx switch
uc3383 cmos ic unisonic technologies co., ltd 3 of 15 www.unisonic.com.tw qw-r502-032,h ? block diagram 2step pfm control osc 100/ 180 khz chip enable buffer v lx limiter v ref + - + - v out v dd ce v ss lx utc uc3383 (v dd is internally connected to the v out pin.) note: the ce pin is only used with the 5-lead package. ~ 5mv
uc3383 cmos ic unisonic technologies co., ltd 4 of 15 www.unisonic.com.tw qw-r502-032,h ? absolute maximum ratings (ta=25c) parameter symbol ratings unit v out input voltage v out 12 v lx pin voltage v lx 12 v ce input voltage v ce 12 v v dd input voltage v dd 12 v lx pin current i lx 400 ma sot-89 500 mw power dissipation sot-25 p d 250 mw operating junction temperature t j +125 c ambient operating temperature t opr -30 ~ +80 c storage temperature t stg -40 ~ +125 c note absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? electrical charactristics (ta=25 , v in =v out 0.6, unless otherwise specified.) utc uc3383-2.0v (i out =10ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 1.950 2.000 2.050 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd1 . f osc >f osc 12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.3 8.6 a supply current 1(note 2) i dd1 v in =v out 0.95 13.6 27.3 a supply current 2 i dd2 v in =v out +0.5v 1.9 3.9 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 9.1 13.7 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 50 55 60 % efficiency effi l, sd, c l etc. connected 70 % f osc 1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency f osc 2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 5 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-2.5v (i out =10ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 2.438 2.500 2.563 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd1 . f osc >f osc 12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.45 8.95 a supply current 1(note 2) i dd1 v in =v out 0.95 16.65 33.35 a supply current 2 i dd2 v in =v out +0.5v 2.0 4.05 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 7.15 10.8 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 70 % f osc 1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency f osc 2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a utc uc3383-2.6v (i out =10ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 2.535 2.600 2.665 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd1 . f osc >f osc 12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.48 9.02 a supply current 1(note 2) i dd1 v in =v out 0.95 17.26 34.56 a supply current 2 i dd2 v in =v out +0.5v 2.02 4.08 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 6.76 10.22 ? duty ratio 1 dty1 same as i dd1 .measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 70 % f osc 1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency f osc 2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 6 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-2.7v (i out =10ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 2.633 2.700 2.768 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd1 . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.51 9.09 a supply current 1(note 2) i dd1 v in =v out 0.95 17.87 35.77 a supply current 2 i dd2 v in =v out +0.5v 2.04 4.11 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 6.37 9.64 ? duty ratio 1 dty1 same as i dd1 .measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 70 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a utc uc3383-2.8v (i out =10ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 2.730 2.800 2.870 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd1 . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.54 9.16 a supply current 1(note 2) i dd1 v in =v out 0.95 18.48 36.98 a supply current 2 i dd2 v in =v out +0.5v 2.06 4.14 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 5.98 9.06 ? duty ratio 1 dty1 same as i dd1, .measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 70 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 7 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-3.0v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 2.925 3.000 3.075 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.6 9.3 a supply current 1(note 2) i dd1 v in =v out 0.95 19.7 39.4 a supply current 2 i dd2 v in =v out +0.5v 2.1 4.2 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 5.2 7.9 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a utc uc3383-3.1v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 3.023 3.100 3.178 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.635 9.365 a supply current 1(note 2) i dd1 v in =v out 0.95 20.3 40.6 a supply current 2 i dd2 v in =v out +0.5v 2.115 4.23 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 5.08 7.72 ? duty ratio 1 dty1 same as i dd1, measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 8 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-3.2v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 3.120 3.200 3.280 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.67 9.34 a supply current 1(note 2) i dd1 v in =v out 0.95 20.9 41.8 a supply current 2 i dd2 v in =v out +0.5v 2.13 4.26 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 4.96 7.54 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a utc uc3383-3.3v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 3.218 3.300 3.383 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.705 9.41 a supply current 1(note 2) i dd1 v in =v out 0.95 21.5 43 a supply current 2 i dd2 v in =v out +0.5v 2.145 4.29 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 4.84 7.36 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 9 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-3.6v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 3.510 3.600 3.690 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.81 9.62 a supply current 1(note 2) i dd1 v in =v out 0.95 23.3 46.6 a supply current 2 i dd2 v in =v out +0.5v 2.19 4.38 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 4.48 6.82 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a utc uc3383-3.7v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 3.608 3.700 3.793 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.845 9.755 a supply current 1(note 2) i dd1 v in =v out 0.95 23.9 47.8 a supply current 2 i dd2 v in =v out +0.5v 2.205 4.41 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 4.36 6.64 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 10 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-4.0v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 3.900 4.000 4.100 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 4.95 9.94 a supply current 1(note 2) i dd1 v in =v out 0.95 25.7 51.4 a supply current 2 i dd2 v in =v out +0.5v 2.25 4.5 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 4.0 6.1 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a utc uc3383-4.5v (i out =30ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 4.388 4.500 4.613 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 5.125 10.25 a supply current 1(note 2) i dd1 v in =v out 0.95 28.8 57.6 a supply current 2 i dd2 v in =v out +0.5v 2.325 4.65 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 3.4 5.2 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 80 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a
uc3383 cmos ic unisonic technologies co., ltd 11 of 15 www.unisonic.com.tw qw-r502-032,h ? electrical charactristics(cont.) utc uc3383-5.0v (i out =50ma) parameter symbol test conditions min typ max unit output voltage v out l, sd, c l etc. connect ed 4.875 5.000 5.125 v maximum input voltage v in 10 v oscillation start-up voltage v st i out =1ma 0.80 0.90 v oscillation hold voltage v hld i out =1ma 0.70 v lx limit voltage v lxlmt same as i dd1 . f osc >fosc12 0.7 1.1 v no-load input current i in i out =0ma (note 1) 5.3 10.6 a supply current 1(note 2) i dd1 v in =v out 0.95 31.7 63.4 a supply current 2 i dd2 v in =v out +0.5v 2.4 4.8 a lx leakage current i lxl no external components, v out =v lx =10v. 1.0 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v 2.8 4.3 ? duty ratio 1 dty1 same as i dd1 . measuring of lx waveform 70 75 80 % duty ratio 2 dty2 i out =1ma. measuring of lx on-time 40 45 50 % efficiency effi l, sd, c l etc. connected 85 % fosc1 same as i dd1 . 75% duty 100 120 130 khz maximum oscillation frequency fosc2 same as i dd1 . 45% duty 150 180 210 khz for 5-pins package only high v ceh same as i dd1 . existence of lx oscillation. 0.75 v ce voltage low v cel same as i dd1 . disappearance of lx oscillation 0.20 v high i ceh same as i dd1 . v ce =v out 0.95 0.25 a ce ?high? current low i cel same as i dd1 . v ce =0v -0.25 a stand-by current i stb same as i dd1 . 0.5 a note: 1. the schottky diode (sd) must be type ma735, with reverse current(i r )<1.0 a at reverse voltage (v r ) =10v. 2. "supply current 1" is the supply cu rrent while the oscillator is continuous ly oscillating. the current actually provided by an external v in source is represented by "no-load input current (i in )".
uc3383 cmos ic unisonic technologies co., ltd 12 of 15 www.unisonic.com.tw qw-r502-032,h ? typical application circuits v out + c l gnd sd v in l l: 100 h sd: ma735 (schottky diode; matsushita) c l : 16v 47 f 3 2 1 utc uc3383 fig.1 3-lead package application(sot-89) v out + c l gnd sd v in l l: 100h sd: ma735 ( schottky diode; matsushita ) c l : 16 v 47 f ce utc uc3383 5 4 3 2 1 fig.2 5-lead package application(sot-25)
uc3383 cmos ic unisonic technologies co., ltd 13 of 15 www.unisonic.com.tw qw-r502-032,h ? typical characteristics (built-in switchi ng transistor) (1) output voltage vs. output curren 20 60 3.0 l3383-3.0v 80 40 100 3.5 2.5 2.0 0 1.5 1.0 output current, i out (ma) l=100 h, c=47 f ( tantalum ) 0.0 0.5 1.8v 1.5v 1.2v v in =0.9v output voltage, v out (v) 2.0v 20 60 5 l3383-5.0v 80 40 100 6 4 3 0 2 l=100 h, c=47 f (tantalum) 0 1 3.0v 1.5v 1.2v v in =0.9v 2.0v output current, i out (ma) output voltage, v out (v) (2) efficiency vs. output current 20 60 80 l3383-5.0v 80 40 100 100 60 40 0 20 l=100 h, c=47 f (tantalum) 0 0.9v 1.2v v in =3.0v 1.5v 2.0v 20 60 80 l3383-3.0v 80 40 100 100 60 40 0 20 output current, i out (ma) 0 0.9v 1.8v 1.2v v in =2.0v eficiency, effi (%) 1.5v l=100 h, c=47 f (tantalum) eficiency, effi (%) output current, i out (ma) (3) ripple voltage vs. output current 20 60 80 l3383-3.0v 80 40 100 100 60 40 0 20 output current, i out (ma) l=100 h, c= 4 7 f (tantalum) 0 0.9v 1.2v v in =1.5v ripple, v r (m v p-p ) 20 60 100 l3383-5.0v 80 40 100 120 80 60 0 40 l=100 h, c=4 7 f (tantalum) 0 v in =3.0v 1.5v 2.0v - 20 ripple, v r (m v p-p ) output current, i out (ma)
uc3383 cmos ic unisonic technologies co., ltd 14 of 15 www.unisonic.com.tw qw-r502-032,h ? typical characteristics for uc3383-5.0 10 515 0 output current, i out (ma) v hld opfrating start voltage, retain voltage, v st , v hld (v) v st (1) operating start voltage, retain voltage vs. output current 5.1 20 -20 40 5.2 5.0 4.9 -40 temperature, ta ( ) 4.8 output voltage, v out (v) (2) output voltage vs. temperature 60 80 0 1.5 2.0 1.0 0.5 0.0 0.8 20 -20 40 1.0 0.6 0.4 -40 0.2 60 80 0 v hld v st 0.0 50 20 -20 40 60 40 30 -40 20 60 80 0 0 10 (3) operating start voltage, retain voltage vs. output current (4) current consumption 1 vs. temperature temperature, ta ( ) temperature, ta ( ) opfrating start voltage, retain voltage, v st , v hld (v) current consumption 1 , i dd1 ( a) 3 20 -20 40 4 2 1 -40 0 60 80 0 3 20 -20 40 4 2 1 -40 0 (6) lx switching-on resistance vs. temperature 60 80 0 (5) current consumption 2 vs. temperature current consumption 2 , i dd2 ( a) amb. temperature ta , ( ) amb. temperature ta , ( ) lx switching-on resistance, rswon ( )
uc3383 cmos ic unisonic technologies co., ltd 15 of 15 www.unisonic.com.tw qw-r502-032,h ? typical characteristics for uc3383-5.0v(cont.) 150 20 -20 40 200 100 50 -40 amb. temperatyre, ta ( ) 0 maximum osc frequency1, 2, max f osc 1, 2(khz) (7) max osc frequency1, 2 vs. amb. temperture 60 80 0 max f osc 2 max f osc 1 80 20 -20 40 100 60 40 -40 0 dutyratio 1, 2 duty 1, 2 (%) (8) duty ratio1, 2 vs. amb. temperature 60 80 0 duty 1 duty 2 20 amb. temperatyre, ta ( ) utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.

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