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unisonic technologies co., ltd rxxld20 linear integrated circuit www.unisonic.com.tw 1 of 10 copyright ? 2005 unisonic technologies co., ltd qw-r102-015.d 2a output type low power-loss voltage regulator features * low power-loss(dropout vo ltage: 0.5v(max) at i out =2.0a) * 2.0a output type * output voltage precision: 3.0% * built-in on/off control functi on and over-current protection circuit. * thermal shutdown protection. 1 to-220b to-220f-4 1 *pb-free plating product number:rxxld20l ordering information order number normal lead free plating package packing rxxld20-tb5-t rxxld20l-tb5-t to-220b tube rxxld20-tf4-t rxxld20l-tf4-t to-220f-4 tube rxxld20l-tb5-t (1)packing type (2)package type (3)lead plating (1) t: tube (2) tb5: to-220b, tf4: to-220f-4 (3) l: lead free plating, blank: pb/sn (4)voltage code (4) xx: refer to marking information pin description pin no. to-220f-4 to-220b pin name 1 nc 1 2 input 2 3 output 3 4 gnd 4 5 on/off
rxxld20 linear integrated circuit unisonic technologies co., ltd 2 of 10 www.unisonic.com.tw qw-r102-015.d marking information package voltage code marking to-220f-4 to-220b 33 :3.3v 35 :3.5v 05 :5.0v 06 :6.0v 09 :9.0v 12 :12 v utc rxxld20l voltage code date code space :pb /sn l: pb-fr ee
rxxld20 linear integrated circuit unisonic technologies co., ltd 3 of 10 www.unisonic.com.tw qw-r102-015.d block diagram to-220f-4 to-220b specfic ic 1 2 3 4 specfic ic 2 3 4 5
rxxld20 linear integrated circuit unisonic technologies co., ltd 4 of 10 www.unisonic.com.tw qw-r102-015.d absolute maximum ratings (ta=25
) parameter symbol ratings unit input voltage(note1) v in 20 v on/off control terminal voltage(note1) vc 20 v output current i out 2.0 a no heat sink 1.4 w power dissipation with heat sink p d 15 w junction temperature(note2) t j 150 c operating temperature t opr -20 ~ +80 c storage temperature t stg -40 ~ +150 c note1 : all are open except gnd and applicable terminals. note2 : overheat protec tion may operate at 125 t j 150 c electrical characteristics (refer to the test circuits, unless otherwise specified, ta=25 c) for r33ld20(3.3v) parameter symbol test conditions min typ max unit output voltage v out v in =5v, i out =1a 3.201 3.3 3.399 v line regulation ? v out v in =4 ~ 10v, i out =5ma 0.1 2.5 % load regulation ? v out v in =5v, i out =5ma ~ 2.0a 0.1 2.0 % temperature coefficient of output voltage tcvo t j =0 ~ 125 c,i out =5ma 0.02 %/ c ripple rejection rr refer to fig.2 45 55 db dropout voltage v d (note1), i out =2a 0.5 v on v c(on) v in =5v 2.0 v voltage for control(note2) off v c(off) v in =5v 0.8 v on i c(on) v c =2.7v,v in =5v 20 a current for control off i c(off) v c =0.4v, v in =5v -0.4 ma quiescent current i q i out =0a, v in =5v 10 ma for r35ld20(3.5v) parameter symbol test conditions min typ max unit output voltage v out v in =5.5v, i out =1a 3.395 3.5 3.605 v line regulation ? v out v in =4.5 ~ 10.5v, i out =5ma 0.1 2.5 % load regulation ? v out v in =5.5v, i out =5ma ~ 2.0a 0.1 2.0 % temperature coefficient of output voltage tcvo t j =0 ~ 125 c,i out =5ma 0.02 %/ c ripple rejection rr refer to fig.2 45 55 db dropout voltage v d (note1), i out =2a 0.5 v on v c(on) v in =5v 2.0 v voltage for control(note2) off v c(off) v in =5v 0.8 v on i c(on) v c =2.7v,v in =5.5v 20 a current for control off i c(off) v c =0.4v, v in =5.5v -0.4 ma quiescent current i q i out =0a, v in =5.5v 10 ma for r05ld20(5v) parameter symbol test conditions min typ max unit output voltage v out v in =7v, i out =1a 4.85 5.0 5.15 v line regulation ? v out v in =6 ~ 12v, i out =5ma 0.5 2.5 % load regulation ? v out v in =7v, i out =5ma ~ 2.0a 0.1 2.0 % temperature coefficient of output voltage tcvo t j =0 ~ 125 c, i out =5ma 0.02 %/ c ripple rejection rr refer to fig.2 45 55 db dropout voltage v d (note1), i out =2a 0.5 v on v c(on) v in =7v 2.0 v voltage for control(note2) off v c(off) v in =7v 0.8 v on i c(on) v c =2.7v, v in =7v 20 a current for control off i c(off) v c =0.4v, v in =7v -0.4 ma quiescent current i q i out =0a, v in =7v 10 ma
rxxld20 linear integrated circuit unisonic technologies co., ltd 5 of 10 www.unisonic.com.tw qw-r102-015.d electrical characteristics(cont.) for r06ld20(6v) parameter symbol test conditions min typ max unit output voltage v out v in =8v, i out =1a 5.82 6.0 6.18 v line regulation ? v out v in =7 ~ 13v, i out =5ma 0.5 2.5 % load regulation ? v out v in =8v, i out =5ma ~ 2.0a 0.1 2.0 % temperature coefficient of output voltage tcvo t j =0 ~ 125 c, i out =5ma 0.02 %/ c ripple rejection rr refer to fig.2 45 55 db dropout voltage v d (note1), i out =2a 0.5 v on v c(on) v in =8v 2.0 v voltage for control(note2) off v c(off) v in =8v 0.8 v on i c(on) v c =2.7v, v in =8v 20 a current for control off i c(off) v c =0.4v, v in =8v -0.4 ma quiescent current i q i out =0a, v in =8v 10 ma for r09ld20(9v) parameter symbol test conditions min typ max unit output voltage v out v in =11v, i out =1a 8.73 9.0 9.27 v line regulation ? v out v in =10 ~ 16v, i out =5ma 0.5 2.5 % load regulation ? v out v in =11v, i out =5ma ~ 2.0a 0.1 2.0 % temperature coefficient of output voltage tcvo t j =0 ~ 125 c, i out =5ma 0.02 %/ c ripple rejection rr refer to fig.2 45 55 db dropout voltage v d (note1), i out =2a 0.5 v on v c(on) v in =11v 2.0 v voltage for control(note2) off v c(off) v in =11v 0.8 v on i c(on) v c =2.7v, v in =11v 20 a current for control off i c(off) v c =0.4v, v in =11v -0.4 ma quiescent current i q i out =0a, v in =11v 10 ma for r12ld20(12v) parameter symbol test conditions min typ max unit output voltage v out v in =14v, i out =1a 11.64 12.0 12.36 v line regulation ? v out v in =13 ~ 19v, i out =5ma 0.5 2.5 % load regulation ? v out v in =14v, i out =5ma ~ 2.0a 0.1 2.0 % temperature coefficient of output voltage tcvo t j =0 ~ 125 c, i out =5ma 0.02 %/ c ripple rejection rr refer to fig.2 45 55 db dropout voltage v d (note1), i out =2a 0.5 v on v c(on) v in =14v 2.0 v voltage for control(note2) off v c(off) v in =14v 0.8 v on i c(on) v c =2.7v, v in =14v 20 a current for control off i c(off) v c =0.4v, v in =14v -0.4 ma quiescent current i q i out =0a, v in =14v 10 ma note: 1.input voltage shall be the val ue when output voltage is 95% in compar ison with the initial value. 2.in case of opening control terminal(pin 5 of to- 220b, pin 4 of to-220f-4), output voltage turns on.
rxxld20 linear integrated circuit unisonic technologies co., ltd 6 of 10 www.unisonic.com.tw qw-r102-015.d test circuits note : : to-220f-4, ( ): to-220b 1 4 3 2 a v vo 0.33 ? f vc i d io ic r l 47 ? f + v in (2) (3) (5) (4) a a fig.1 1 4 3 2 v + + fig.2 for ripple rejection v in 0.33 ? f 47 ? f io r l ei eo f=120hz ei=0.5vrms v in =5v(r33ld20) 5.5v(r35ld20) 7v(r05ld20) 8v(r06ld20) 11v(r09ld20) 14v(r12ld20) io=0.5a rr=20log (ei/eo) (2) (3) (5) (4) typical application 1 4 3 2 v in v o load cin co + on/off signal high or open:output on low :output off ( ) : to-220b : to-220f-4 (2) (3) (4) (5)
rxxld20 linear integrated circuit unisonic technologies co., ltd 7 of 10 www.unisonic.com.tw qw-r102-015.d typical characteristics power dissipation, p d (w) -20 80 40 20 060 0 5 10 15 20 0 0 output voltage, vo (v) a m b i e n t t e m p e r a t u r e , t a (
) fig.3 power dissipation vs. ambient temperature fig.4 overcurrent protection characteristics(typical value) (r33ld20) pd1 pd2 pd1:no heat sink pd2:with infinite heat sink 4.0 3.0 2.0 1.0 9 8 7 6 5 4 3 2 1 10 11 12 note: oblique line portion:overheat protection may operate in this area . vd=3v vd=0.5v vd=1v vd =2v o u t p u t v o l t a g e , v o ( v ) o u t p u t c u r r e n t , i o ( a ) 04.0 3.0 2.0 1.0 12 11 10 9 8 7 6 5 4 3 2 1 fig.6 overcurrent protection characteristics (typical value)(r09ld20) o u t p u t v o l t a g e , v o ( v ) o u t p u t c u r r e n t , i o ( a ) fig.7 overcurrent protection characteristics (typical value)(r12ld20) o u t p u t c u r r e n t i o ( a ) o u t p u t v o l t a g e , v o ( v ) 04.0 3.0 2.0 1.0 12 11 10 9 8 7 6 5 4 3 2 1 vd=0.5v fig.8 output voltage deviation vs .junction temperature (r03ld20) output voltage deviation, ? vo (mv) -25 100 50 25 075125 -100 -50 0 50 100 150 v in =5v io=0.5a j u n c t i o n t e m p e r a t u r e , t j (
) vd=2v vd=3v vd=1v vd=0.5v vd=2v vd=3v vd=1v fig.5 overcurrent protection characteristics (typical value)(r05ld20) 04.0 3.0 2.0 1.0 12 11 10 9 8 7 6 5 4 3 2 1 vd=2v vd=0.5v vd=3v vd=1v
rxxld20 linear integrated circuit unisonic technologies co., ltd 8 of 10 www.unisonic.com.tw qw-r102-015.d typical characteristics(cont.) fig.9 output voltage deviation vs .junction temperature (r05ld20) output voltage deviation, ? vo (mv) -25 100 50 25 075125 j u n c t i o n t e m p e r a t u r e , t j (
) -100 -50 0 50 100 150 v in =7v io=0.5a v in =11v io=0.5a -25 100 50 25 0 75 125 -150 -100 -50 0 50 100 150 250 fig.10 output voltage deviation vs .junction temperature (r09ld20) output voltage deviation, ? vo (mv) j u n c t i o n t e m p e r a t u r e , t j (
) i n p u t v o l t a g e , v i n ( v ) o u t p u t v o l t a g e , v o ( v ) vi-o=0.5v vi-o=1v 0 15 10 5 0 5 10 v in =18v io=0.5a -25 100 50 25 0 75 125 -150 -100 -50 0 50 100 150 250 fig.11 output voltage deviation vs .junction temperature (r12ld20) output voltage deviation, ? vo (mv) j u n c t i o n t e m p e r a t u r e , t j (
) 200 -200 fig.12 output voltage vs .input voltage (r33ld20) 08 6 4 2 8 7 6 5 4 3 2 1 10 0 fig.13 output voltage vs .input voltage (r05ld20) i n p u t v o l t a g e , v i n ( v ) fig.14 output voltage vs .input voltage (r09ld20) o u t p u t v o l t a g e , v o ( v ) i n p u t v o l t a g e , v i n ( v ) r l = ? r l =2.5 ? r l =2.5 ? r l = ? r l =9 ? r l =4 .5 ? 08 6 4 2 8 7 6 0 4 3 2 1 o u t p u t v o l t a g e , v o ( v ) 10 r l = ? r l =3.3 ? r l =1.65 ? 0
rxxld20 linear integrated circuit unisonic technologies co., ltd 9 of 10 www.unisonic.com.tw qw-r102-015.d typical characteristics(cont.) output voltage, vo (v) 0 25 15 10 520 0 5 10 15 20 i n p u t v o l t a g e , v i n ( v ) fig.15 output voltage vs .input voltage (r12ld30) fig.16 circuit operating current vs .input voltage (r33ld30) r l = ? r l =12 ? r l =6 ? 0510 0 20 40 60 80 i n p u t v o l t a g e , v i n ( v ) r l = ? r l =3.3 ? r l =1.65 ? output voltage, vo (v) i n p u t v o l t a g e , v i n ( v ) i n p u t v o l t a g e , v i n ( v ) fig.20 dropout voltage vs .junction temperature d r o p o u t v o l t a g e , v i - o ( v ) j u n c t i o n t e m p e r a t u r e , t j (

0510 0 20 40 60 80 circuit operating current, i bias (ma) fig.17 circuit operating current vs .input voltage (r05ld30) i n p u t v o l t a g e , v i n ( v ) 0 10 15 fig.18 circuit operating current vs .input voltage (r09ld30) 0 20 40 60 80 5 20 40 60 80 fig.19 circuit operating current vs .input voltage (r12ld30) circuit operating current, i bias (ma) 025 15 10 520 0 -25 50 0 0.1 0.2 0.3 0.4 125 100 075 25 0.5 circuit operating current, i bias (ma) r l = ? r l =5 ? r l =2.5 ? r l = ? r l =9 ? r l =4.5 ? r l = ? r l =12 ? r l =6 ? r33ld20 r12ld20 r09ld20 r05ld20
rxxld20 linear integrated circuit unisonic technologies co., ltd 10 of 10 www.unisonic.com.tw qw-r102-015.d typical characteristics(cont.) -25 100 50 25 075 0 2 4 6 8 ripple rejection, rr (db) i n p u t r i p p l e f r e q u e n c y , f ( k h z ) fig.22 ripple rejection vs .input ripple frequency 125 10 fig.21 quiescent current vs .junction temperature q u i e s c e n t c u r r e n t , i q ( m a ) j u n c t i o n t e m p e r a t u r e , t j (

io=oa r12ld20 r09ld20 r05ld20 r33ld20 0.1 100 0 20 40 60 80 70 50 30 10 10 1 r05ld20(v in =7v) r09ld20(v in =11 v) r12ld20 (v in =14 v) r33ld20(v in =5v) i0=c=0.5a,ei=0.5vrms 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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