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unisonic technologies co., ltd uc621xx cmos ic www.unisonic.com.tw 1of 13 copyright ? 2011 unisonic technologies co., ltd qw-r052-028.c boosting voltage regulators ? description the utc uc621xx is a positive output vo ltage regulator that can supply up to 1a of output current using an external transistor. low power and high accuracy are achieved through cmos process and metal fuses trimming technologies. the series consists of a high prec ision voltage reference, an error correction circuit and a short-circ uit protected output driver. in stand-by mode, supply current can be dramatically cut. since the input-output voltage differential is small, loss control efficiency is good. the utc uc621xx is particularly suited for use with battery operated portable products, and products where supply current regulation is required. ? features * ultra small input-out put voltage differential : 100ma of output current is avail able with a differential of 0.1v. (performance depends on the external transistor characteristics.) * maximum output current : 1a * output voltage range : 2v ~ 6v in 0.1v increments * highly accurate : set-up voltage 2% * low power consumption : typ.50 a (v out = 5.0v) : typ.0.2 a (stand-by) * output voltage temperature c haracteristics: typ. 100ppm/ * input stability : typ.0.1%/v ? ordering information ordering number package packing lead free halogen free UC621XXL-AF5-R uc621xxg-af5-r sot-25 tape reel note: xx: output voltage, re fer to marking information.
uc621xx cmos ic unisonic technologies co., ltd 2 of 13 www.unisonic.com.tw qw-r502-028.c ? marking information package voltage code marking sot-25 30:3.0v 33:3.3v 40:4.0v 50:5.0v 3 2 1 62xx g 5 4 voltage code g: halogen free l: lead free ? pin configuration pin no. pin name function 1 v ss ground 2 v in supply voltage input 3 v out regulated voltage output 4 ext base current control 5 ce chip enable ? function series ce output voltage utc uc621xx h on l off ? block diagram voltage reference + - current limit v dd ext ce v out vss
uc621xx cmos ic unisonic technologies co., ltd 3 of 13 www.unisonic.com.tw qw-r502-028.c ? absolute maximum ratings (t a =25 ) parameter symbol ratings unit input voltage v in 12 v output voltage v out vss-0.3 ~ v in +0.3 v ce input voltage v ce vss-0.3 ~ v in +0.3 v ext output voltage v o ( ext ) 12 v ext output current i ext 50 ma power dissipation p d 150 mw junction temperature t j +125 operating temperature t opr -40 ~ +85 storage temperature t stg -40 ~ +150 note:1.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. 2.the device is guaranteed to meet performance specification within 0 ~+70 operating temperature range and assured by design from -20 ~+85 . ? electrical characteristics (t a =25 , unless otherwise specified.) uc62130 ( v out(t) =3.0v) parameter symbol test conditions min typ max unit output voltage (note2) v out ( e ) i out =50ma, v in =4.0v 2.940 3.000 3.060 v input voltage v in 8 v ext output voltage v ext 8 v ce level voltage high v ceh 1.5 v low v cel 0.25 v load stability (note 4) v out v in =4.0v, 1ma i out 100ma -60 60 mv input-output voltag e differential v diff i out =100ma 100 mv maximum output current(note 4) i out ( ma x ) v in =4.0v 1000 ma supply current1 iss1 v in =4.0v, v ce =v ss 0.6 a supply current2 iss2 v in =8.0v, v ce =v in 50 80 a ext leakage current i leak 0.5 a ce level current high i ceh v ce =v in 0.1 a low i cel v ce =v ss -0.2 -0.05 0 a input stability (note 4) v out v in v out i out =50ma, 4.0v v in 8.0v 0.1 0.3 %/v output voltage temperature characteristics (note 4) v out t opr v out i out =10ma, -20 t opr 85 100 ppm/ uc62133 (v out(t) =3.3v) parameter symbol test conditions min typ max unit output voltage (note2) v out ( e ) i out =50ma, v in =4.3v 3.234 3.300 3.366 v input voltage v in 8 v ext output voltage v ext 8 v ce level voltage high v ceh 1.5 v low v cel 0.25 v load stability (note 4) v out v in =4.3v, 1ma i out 100ma -60 60 mv input-output voltag e differential v diff i out =100ma 100 mv maximum output current (note 4) i out ( ma x ) v in =4.3v 1000 ma supply current1 iss1 v in =4.3v, v ce =v ss 0.6 a supply current2 iss2 v in =8.0v, v ce =v in 50 80 a ext leakage current i leak 0.5 a ce level current high i ceh v ce =v in 0.1 a low i cel v ce =v ss -0.2 -0.05 0 a input stability (note 4) v out v in v out i out =50ma, 4.3v v in 8.0v 0.1 0.3 %/v output voltage temperature characteristics (note 4) v out t opr v out i out =10ma, -20 t opr 85 100 ppm/
uc621xx cmos ic unisonic technologies co., ltd 4 of 13 www.unisonic.com.tw qw-r502-028.c ? electrical characteristics(cont.) uc62140 (v out(t) =4.0v) parameter symbol test conditions min typ max unit output voltage (note2) v out ( e ) i out =50ma, v in =5.0v 3.92 4.000 4.08 v input voltage v in 8 v ext output voltage v ext 8 v ce level voltage high v ceh 1.5 v low v cel 0.25 v load stability (note 4) v out v in =5.0v, 1ma i out 100ma -60 60 mv input-output voltag e differential v diff i out =100ma 100 mv maximum output current(note 4) i out ( ma x ) v in =5.0v 1000 ma supply current1 iss1 v in =5.0v, v ce =v ss 0.6 a supply current2 iss2 v in =8.0v, v ce =v in 50 80 a ext leakage current i leak 0.5 a ce level current high i ceh v ce =v in 0.1 a low i cel v ce =v ss -0.2 -0.05 0 a input stability (note 4) v out v in v out i out =50ma, 5.0v v in 8.0v 0.1 0.3 %/v output voltage temperature characteristics (note 4) v out t opr v out i out =10ma, -20 t opr 85 100 ppm/ uc62150 (v out(t) =5.0v) parameter symbol test conditions min typ max unit output voltage (note2) v out ( e ) i out =50ma, v in =6.0v 4.900 5.000 5.100 v input voltage v in 8 v ext output voltage v ext 8 v ce level voltage high v ceh 1.5 v low v cel 0.25 v load stability (note 4) v out v in =6.0v, 1ma i out 100ma -60 60 mv input-output voltag e differential v diff i out =100ma 100 mv maximum output current(note 4) i out ( ma x ) v in =6.0v 1000 ma supply current1 iss1 v in =6.0v, v ce =v ss 0.6 a supply current2 iss2 v in =8.0v, v ce =v in 50 80 a ext leakage current i leak 0.5 a ce level current high i ceh v ce =v in 0.1 a low i cel v ce =v ss -0.2 -0.05 0 a input stability (note 4) v out v in v out i out =50ma, 6.0v v in 8.0v 0.1 0.3 %/v output voltage temperature characteristics (note 4) v out t opr v out i out =10ma, -20 t opr 85 100 ppm/ note: 1. v out(t) =specified output voltage. 2. v out(e) =effective output voltage (i .e. the output voltage when "v out(t) +1.0v" is provided at the v in pin while maintaining a certain i out value). 3. v diff = {v in1 -v out1 } *v out1 = a voltage equal to 98% of the output voltage whenever an amply stabilized i out {v out(t) +1.0v} is input. *v in1 = the input voltage when v out1 appears as input voltage is gradually decreased. 4. the characteristics for those parameters marked with an asterisk* are liable to vary depending on which transistor is used. please use a transistor with a low saturation voltage level and h fe equal to 100 or more.
uc621xx cmos ic unisonic technologies co., ltd 5 of 13 www.unisonic.com.tw qw-r502-028.c ? typical application circuit ? operational explanation functional description output voltage (v out ) can be fixed by revising the external transistor's base current. this can be done by comparing the detected volt age level and the set voltage power supply level. ? directions for use suggestions for external comporients 1. pnp transistor the selection of a transistor should take into account output current, input voltage and power dissipation for each specific application. it is reco mmended that a transistor that has a low output saturated voltage (v ce ) and high h fe characteristics be used. 2. r b resistor although the ic unit is protected by a base current remitter circuit, it is recommended that a resistor (r b ) be connected between the transistor's base and the ic's ext pin to protect the transistor. required output current can be calculated using the follow ing equation although characteristic variations and conditions of use should be carefully checked before use. the following equation also indicates the conditions needed to obtain i out (max.) at v in (min.) . however, the larger the input curre nt, the larger the output current (i out ) that can be obtained. v in(min) -1.2(v) 0.7(v) i out(max) r b r be h fe 3. r be resistor, c l capacitor to prevent oscillation due to output load variat ion, use of a phase compensation capacitor c l is recommended. please use a tantalum capacitor of at least 10 f. please also use an r be resistor of less than 47k ? . an r be resistor of between 20k ? and 47k ? is recommended for less power consumption. 4. input impedance in order to control oscillation brought about as a result of impedance at the power supply line, connect a capacitor of 10 f or more (tantalum) between the external transistor's emitter and the ground pin. special note 1. protection circuit the built-in protect circuit is to protect the ic only. therefore to prevent output shorts and overshoot current through the transistor, use of a resistor r b or an overshoot current protection circuit is recommended. care should also be taken with the transistor's power dissipation.
uc621xx cmos ic unisonic technologies co., ltd 6 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics (1) output voltage vs. output current output voltage, v out (v) output voltage, v out (v) output v oltage, v o ut (v) ,v out (v) output v oltage (2) output voltage vs. input voltage 2.5 3.0 3.2 3.0 3.5 2.8 2.6 uc62130 34 3.05 5 2.85 3.10 3.00 6 2.95 2.90 2.4 2.2 input voltage, v in (v) output voltage, v out (v) input voltage, v in (v) , v out (v) 500 ma 100 ma 500ma 100 ma uc62130 i out =1ma i out =1 ma t opr =25 c l =10 f (tantalum) t opr =25 c l =10 f (tantalum) output voltag e
uc621xx cmos ic unisonic technologies co., ltd 7 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) 2 . 8 3.3 3.5 3.3 3.8 3.1 2.9 uc62133 34 3.35 5 3.15 3.40 3.30 6 3.25 3.20 2.7 2.5 input voltage, v in (v) output voltage, v out (v) input voltage, v in (v) , v out (v) 500 ma 100 ma 500ma 100 ma uc62133 i out =1m a i out =1m a t opr =25 c l =10 f (tantalum) t opr =25 c l =10 f (tantalum) output voltag e , v out (v) output voltage, v o ut (v) output volta ge ,v ou t (v) output voltage, v out (v) output voltage
uc621xx cmos ic unisonic technologies co., ltd 8 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) (3) input/output voltage differential vs. output current input/output differential, v diff (v) input/output differential, v diff ( v ) input/output differential, v diff (v) input/output differential, v diff (v) (4) supply current vs. input voltage 34 40 supply current, iss (a) 5 0 50 30 6 input voltage, v in (v) 20 10 uc62130 t opr =25 85 -20 34 40 supply current, iss (a) 5 0 50 30 6 input voltage, v in (v) 20 10 uc62133 t opr =25 85 -20
uc621xx cmos ic unisonic technologies co., ltd 9 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) supply current, iss a ) supply current, iss ( a) ( (5) output volttage vs. ambient temperature output voltage, v out (v) output voltage, v out (v) output voltage, v out (v) output voltage, v out (v)
uc621xx cmos ic unisonic technologies co., ltd 10 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) (6) supply current vs. ambient temperature supply current, iss ( a ) supply current, iss ( a ) supply current, iss ( a ) supply current, iss ( a ) (7) input transient response input voltage, v in (v) output voltage, v out (v) input voltage, v in (v) output voltage, v out (v)
uc621xx cmos ic unisonic technologies co., ltd 11 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) 3.7 5 uc62133 3.4 3.3 3.5 3.6 1 6 4 3 time (0.4msec /div) 2 3.2 3.7 5 uc62133 3.4 3.3 3.5 3.6 1 6 4 3 time (0.4msec/div) 2 3.2 input voltage output voltage input voltage output voltage i out =10 ma c l = 10 f (tantalum) i out =100 ma c l = 10 f (tantalum) input voltage, v in (v) output voltage, v out (v) input voltage, v in (v) output voltage, v out ( v ) 5.4 7 uc62150 5.1 5.0 5.2 5.3 3 8 6 5 time (0.4 msec/div) input voltage, v in (v) 4 4.9 output voltage, v out (v) 5.4 7 uc62150 5.1 5.0 5.2 5.3 3 8 6 5 time (0.4msec/div) input voltage, v in ( v ) 4 4.9 output voltage, v ou t ( v ) input voltage output voltage input voltage output voltage i out =10 ma c l = 10 f (tantalum) i out =100 ma c l = 10 f (tantalum)
uc621xx cmos ic unisonic technologies co., ltd 12 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) (8) load transient response 1000 3.05 uc62130 400 200 600 800 2.85 3.10 3.00 2.95 time (10msec/div) output voltage, v out (v) 2.90 0 output voltage, i out (ma) output voltage output current 300ma 1ma v in =4.0v, c l =1 0 f (tantalum) 1000 3.35 uc62133 400 200 600 800 3.15 3.40 3.30 3.25 time (10msec/div) output voltage, v out (v) 3.20 0 output voltage, i out (ma) output voltage output current 300ma 1ma v in =4.3v, c l =1 0 f (tantalum) 1000 5.05 uc62150 400 200 600 800 4.85 5.10 5.00 4.95 time (1 0 m s e c / d i v ) output voltage, v out ( v) 4.90 0 output voltage, i out (ma) output voltage output current 1000 4.05 uc62140 400 200 600 800 3.85 4.10 4.00 3.95 time (10 msec/div) output voltage, v out (v) 3.90 0 output voltage, i out (ma) output voltage output current 300ma 1ma 300ma 1ma v in =6v, c l =1 0 f( tantalum ) v in =5v, c l =1 0 f (tantalum) (9) ripple rejection rate 0.01 0.1 50 uc62130 ripple rejection rate, rr (db) 1 10 60 40 10 30 20 0 ripple frequency ,f(khz) v in =4.0v dc +0.5v p-pac i out = 200ma, c l =10 f (tantalum) 0.01 0.1 50 uc62133 ripple rejection rate, rr (db) 1 10 60 40 10 30 20 0 ripple frequency ,f(khz) v in =4.3v dc +0.5v p-pac i out = 200ma, c l =10 f (tantalum)
uc621xx cmos ic unisonic technologies co., ltd 13 of 13 www.unisonic.com.tw qw-r502-028.c ? typical characteristics(cont.) 0.01 0.1 50 uc62150 ripple rejection rate, rr (db) 1 10 60 40 10 30 20 0 0.01 0.1 50 uc62140 ripple rejection rate, rr (db) 1 10 60 40 10 ripple frequency ,f(khz) 30 20 0 ripple frequency, f (khz) v in = 6v dc +0.5v p-pac i out = 200ma, c l =10 f (tantalum) v in = 5v dc +0.5v p-pac i out =200ma, c l =10 f (tantalum) 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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