unisonic technologies co., ltd ur13325 linear integrated circuit www.unisonic.com.tw 1 of 8 copyright ? 2008 unisonic technologies co., ltd qw-r102-030.c 2 channel low-dropout voltage regulator ? features * dual output: 3.3v/1a, 2.5v/1a. * output voltage pr ecision of 2%. * output consists of pnp power tr ansistor with low-dropout voltage. * built-in over current protection circuit (ocp). * built-in thermal shut down circuit (tsd). * ideal for hard disk drives applications. *pb-free plating product number: ur13325l ? ordering information ordering number normal lead free plating package packing UR13325-TN5-R ur13325l-tn5-r to-252-5 tape reel ur13325-tn5-t ur13325l-tn5-t to-252-5 tube ur13325l-tn5-r (1)packing type (2)package type (3)lead plating (1) r: tape reel, t: tube (2) tn5: to-252-5 (3) l: lead free plating, blank: pb/sn
ur13325 linear integrated circuit unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r102-030.c ? pin discription pin no. pin name function 1 v cc power supply 2 n.c. not internally connected 3 gnd ground 4 vo1 3.3v output 5 vo2 2.5v output
ur13325 linear integrated circuit unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r102-030.c ? block diagram reference voltage current limit sat. prevention sat. prevention thermal shut down vo 2 nc pin 5 pin 2 pin 4 vo 1 vcc vcc current limit vcc vcc vcc pin 1 pin 3 gnd + - + -
ur13325 linear integrated circuit unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r102-030.c ? absolute maximum ratings (ta=25 ) parameter symbol ratings unit supply voltage v cc 18 v 1000 mw power dissipation derating above 25 c p d 8 mw/ c junction temperature t j +150 c operating temperature t opr -40 ~ +85 c storage temperature t stg -55 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating ratings (ta=25 ) parameter symbol min max unit input voltage v cc 3.0 16.0 v 3.3v output current io1 1 a 2.5v output current io2 1 a ? electrical characteristics (refer to the test circuit, ta=25 , v cc =5v unless otherwise specified.) parameter symbol test conditions min typ max unit bias current i bias i o1 =0ma, i o2 =0ma 2.0 2.3 ma 3.3v output output voltage 1 v o1 i o1 =500ma 3.234 3.30 3.366 v dropout voltage 1 v d1 i o1 =500ma, v cc =3.135v 0.25 0.5 v peak output current 1 i o1 1.0 1.7 a ripple rejection 1 r.r.1 f=120hz, ein=1vrms i o1 =200ma 50 58 db line regulation 1 v line1 v cc =4v ~ 16v, i o1 =500ma 5 30 mv load regulation 1 v load1 i o1 =0ma ~ 1a 30 75 mv temperature coefficient of output voltage 1 t cvo1 i o1 =5ma, t j =0 ~ 125 0.01 %/ short circuit output current 1 i os1 v cc =16v 600 ma 2.5v output output voltage 2 vo2 i o2 =500ma 2.450 2.50 2.550 v peak output current 2 io2 1.0 1.7 a ripple rejection 2 r.r.2 f=120hz, ein=1vrms i o2 =200ma 50 58 db line regulation 2 v line2 v cc =4v ~ 16v, i o2 =500ma 5 30 mv load regulation 2 v load2 i o2 =0ma ~ 1a 30 75 mv temperature coefficient of output voltage 2 t cvo2 i o2 =5ma, t j =0 ~ 125 0.01 %/ short circuit output current 2 i os2 v cc =16v 450 ma note: all characteristic are measured with a capacity across the input (0.33 f) and the output (22 f). measurement is done at t a P t j , and variations in the par ameter of all measurement (except for temperature coefficient of output voltage) caused by temperature change are not considered.
ur13325 linear integrated circuit unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r102-030.c ? power dissipation 12.5 10 7.5 5 2.5 0 0 25 50 75 100 125 150 ambient temperature, t a ( ) power dissipation, p d (w) (1) with infinitc aluminum heat sink jc=12.5 ( /w) (2) with no heat sink ja=125.0( /w) (2) 1.0 (1) 10.0
ur13325 linear integrated circuit unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r102-030.c ? application circuit ? test circuit for each condition for ripple rejection ratio vo 1 vo 2 gnd vcc 22 f io + 0.33 f v ein v in or
ur13325 linear integrated circuit unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r102-030.c ? application information operation supply voltage range the circuit functionality is guaranteed within operation of ambient temperature range, as long as it is within operation supply voltage range. the standar d electrical characteristic values are guaranteed at the test circuit voltage of vcc=5v. the cannot be guarant eed at other voltages in the operating range of 3. 0v~16.0v, however, the variation will be small. input /output characteristic dropout region regulation region recommended operating region off region v out 2v 3v (typ.t a =25 ) v in for proper regulation, this device must be operated in the recommended operating region shown above. power dissipation refer to the thermal duration characteristics shown in page 4. also, be sure to use this ic within a power dissipation rage allowing enough margins. output and bypass capacitor to prevent oscillations, place the output capacitor betwe en the output pin and gnd for both channel. there is a possibility for oscillation if capacitor's value changes due to temperature, volt age, etc. more than 22 f electrolytic capacitor is recommended. if an extr emely large value of (over 1000 f) is used, it may cause oscillations at low frequency. in case of using ceramic capacitor (it is recommended more than 10 f) connect with 1 ? resistance serially as esr. for the bypass capacitor, a 0.33 f capacitor placed as close to vcc pin and gnd pin as possible is recommended. over- current protection circuit the over-current protection circuits ar e built in at the outputs. they prot ect the ic from being damaged when the load is short-circuited or subjected to an over current condition. this prot ection circuits perform holdback current limiting. thermal protection circuit a thermal shut down circuit (t.s.d.) is built into the ic to prevent damage due to over heating, therefore, all the outputs are turned off when the t.s.d. circuit is activat ed and are turned on when the temperature recedes to the specified level. however, the t.s.d. circuit is only for extreme conditions and the regulator circuit should still be designed for the ic not to exceed t j(max) =150 . grounding it is recommended that every capacitor (bypass and output capacitors) is grounded to pin3 using single-point connections. electromagnetic fields the ic is susceptible to strong electromagnetic fields and may cause malfunction. t herefore, caution should be used when placing it on the pcb. protection diodes it is recommended that protection diodes be used when the output is connected to an inductive load.
ur13325 linear integrated circuit unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r102-030.c 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 expe cted to result in personal injury. reproduction in whole or in part is prohibited without the prior writ ten 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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