utc ur0033 linear integrated circuit utc unisonic technologies co., ltd. 1 qw-r102-023,a 2 channel low-dropout voltage regulator features *dual output: adj/1a, 3.3v/1a. *output voltage precision of 2%. *output consists of pnp power transistor with low-dropout voltage. *built-in over current protection circuit (ocp). *built-in thermal shut down circuit (tsd). *ideal for hard disk drives applications. 1 to-252-5 1: vcc 2: adj 3: gnd 4: v o1 5: v o2 *pb-free plating product number: ur0033l pin discription pin no. pin name function 1 vcc power supply 2 adj 1.25v 3 gnd ground 4 vo 1 adj output 5 vo 2 3.3v output
utc ur0033 linear integrated circuit utc unisonic technologies co., ltd. 2 qw-r102-023,a block diagram reference voltage current limit sat. prevention sat. prevention thermal shut down vo 2 adj pin 5 pin 2 pin 4 vo 1 vcc vcc current limit vcc vcc vcc pin 1 pin 3 gnd + - + -
utc ur0033 linear integrated circuit utc unisonic technologies co., ltd. 3 qw-r102-023,a absolute maximum ratings (t a =25 ) parameter symbol ratings unit supply voltage vcc 18 v power dissipation p d 1000* mv operating temperature range t opr -40 ~ +85 c storage temperature range t stg -55 ~ +150 c junction temperature t j 150 c * p d derated at 8mw/ for temperatures above t a =25 operating ratings (t a =25 ) parameter symbol min max unit input voltage vcc 4.0 16.0 v adj output current io 1 1 a 3.3v output current io 2 1 a electrical characteristics (refer to the test circuit, t a =25 , v cc =6v unless otherwise specified.) parameter symbol test conditions min typ max unit bias current i b io 1 =0ma, io 2 =0ma 0.8 1.5 ma adj output output voltage 1 vo 1 io 1 =500ma 1.225 1.25 1.275 v dropout voltage 1 v d1 io 1 =500ma 0.25 0.5 v peak output current 1 io 1 1.0 1.7 a ripple rejection 1 r.r.1 f=120hz, ein=1vrms io 1 =200ma 50 58 db line regulation 1 v line1 vcc=v o +1v ~ 16v, io 1 =500ma 5 30 mv load regulation 1 v load1 io 1 =0ma ~ 1a 30 75 mv temperature coefficient of output voltage 1* t cvo1 io 1 =5ma, t j =0 ~ 125 0.01 %/ short circuit output current 1 i os1 vcc=16v 270 ma 3.3v output output voltage 2 vo 2 io 2 =500ma 3.234 3.30 3.366 v peak output current 2 io 2 1.0 1.7 a ripple rejection 2 r.r.2 f=120hz, ein=1vrms io 2 =200ma 50 58 db line regulation 2 v line2 vcc=4v ~ 16v, io 1 =500ma 5 30 mv load regulation 2 v load2 io 2 =0ma ~ 1a 30 75 mv temperature coefficient of output voltage 2* t cvo2 io 2 =5ma, t j =0 ~ 125 0.01 %/ short circuit output current 2 i os2 vcc=16v 270 ma * design guarantee. (outgoing inspection is not done on all products.) this product is not designed for protection against radioactive rays. 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 parameter of all measurement (except for temperature coefficient of output voltage)caused by temperature change are not considered.
utc ur0033 linear integrated circuit utc unisonic technologies co., ltd. 4 qw-r102-023,a 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 j-c=12.5 ( /w) (2) with no heat sink j-a=125.0( /w) (2) 1.0 (1) 10.0 standard application circuit vo 1 vo 2 gnd vcc 22 f or 10 f ceramic 1 22 f + + 1 or 10 f ceramic test circuit for each condition vo 1 or vo 2 gnd vcc 22 f io + a 0.33 f v a
utc ur0033 linear integrated circuit utc unisonic technologies co., ltd. 5 qw-r102-023,a test circuit for ripple rejection ratio vo 1 vo 2 gnd vcc 22 f io + 0.33 f v ein v in or 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 standard electrical characteristic values are guaranteed at the test circuit voltage of vcc=v o +1v. the cannot be guaranteed at other voltages in the operating range of v o +1v ~ 16.0v, homever, 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 fig.3. 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 between the output pin and gnd for both channel. there is a possibility for oscillation if capacitor ' s value changes due to temperature, voltage, etc. more than 22 f electrolytic capacitor is recommended. if an extremely 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.
utc ur0033 linear integrated circuit utc unisonic technologies co., ltd. 6 qw-r102-023,a over- current protection circuit the over-current protection circuits are built in at the outputs. they protect the ic from being damaged when the load is short-circuited or subjected to an over current condition. this protection 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 overheating, therefore, all the outputs are turned off when the t.s.d. circuit is activated 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. therefore, 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. 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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