________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 1/10 um365xx 300ma, micropower, vldo linear regulator um365xxs sot23-3 general description the um365xxs series are vldo (very low dropout) linear regulators d esigned for low power portable applications. typical output noise is only 100 v rms and maximum dropout is just 200mv at the load current of 100ma.the internal p-channel mosfet pass transistor requires no base current, allowing the device to draw only 90 a during normal operation at the maximum load current of 300ma. other features include high output voltage accura cy, excellent transient response, under voltage lockout, stability with ultralow esr ceramic capacitors as small as 1 f, thermal overload protection and output current limiting. the um365xxs series are available in a low profile sot23-3 package. applications features z bluetooth/802.11 cards z pdas and notebook computers z portable instruments and battery-powered systems z cellular phones z low dropout: 200mv(max) at 100ma z maximum input voltage: 6.0v z low noise:100 v rms (10hz to 100khz) z 2%voltage accuracy at 150ma z fast transient response z fixed output voltage: 5.0v/4.8v/4.7v/4.5v/4.3v/4.2v/4.0v/3.8v/ 3.6v/3.5v/3.3v/3.0v/2.8v/2.7v/2.5v/1.8v/ 1.5v/1.3v/1.2v z output current limit z stable with 1 f output capacitor z thermal overload protection z low profile sot23-3 package pin configurations top view um365xxs m: month code sot23-3
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 2/10 um365xx pin description pin number symbol function 1 in power supply 2 out voltage regulated output 3 gnd ground ordering information part number output voltage packaging type marking code shipping qty UM36550S 5.0v u4f um36548s 4.8v 54q um36547s 4.7v 54p um36545s 4.5v 54j um36543s 4.3v u4e um36542s 4.2v u4d um36540s 4.0v 54r um36538s 3.8v 54k um36536s 3.6v 54l um36535s 3.5v 53z um36533s 3.3v 53u um36530s 3.0v 52r um36528s 2.8v 52q um36527s 2.7v 52p um36525s 2.5v 52n um36518s 1.8v 52k um36515s 1.5v 52j um36513s 1.3v 52e um36512s 1.2v sot23-3 52d 3000pcs/7inch tape & reel
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 3/10 um365xx absolute maximum ratings (note 1) symbol parameter value unit v in supply voltage on in pin -7.5 to +7.5 v v out voltage on out pin -0.3 to +7.5 v output short-circuit duration indefinite t j operating junction temperature (notes 2, 3) -40 to +125 c t stg storage temperature range -65 to +150 c t l lead temperature for sold ering 10 seconds +300 c note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired. note 2: the um365xxs is tested and specifi ed under pulse load conditions such that t j t a . the device is guaranteed to meet pe rformance specifications from 0 to 70 . specifications over the ? 40 to 125 operating junction temperature range are assured by design, characterization and correlation with statistical process controls. note 3: this ic includes overtemperature protec tion that is intended to protect the device during momentary overload conditions. junction temperature will exceed 125 when overtemperature protection is active. contin uous operation above the specified maximum operating junction temperature may impair device reliability.
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 4/10 um365xx electrical characteristics v + =+510%,t a =-40 to +85 .typical conditions:vcc=5v, t a =25 . symbol parameter test conditions min typ max unit v in input voltage range 2.5 5.5 v v out output voltage range 1.2 5.0 v i out =0ma 70 120 i q operating quiescent current i out =300ma 90 130 a i out output current 300 ma output voltage accuracy 1ma i out 300ma, t a =-40 to +85 -2.5 +2.5 % v do dropout voltage i out =100ma 150 200 mv i limt output current limit r l =1 ? 330 450 700 ma t startup time response r l =68 ? , c out =1 f 20 s output voltage tc 100 ppm/ t shdn thermal-shutdown temperature 160 t shdn thermal-shutdown hysteresis 20 line regulation v out +0.3v v in 5.5v or v in >2.5v i out =10ma 0.3 %/v load regulation v in =v out +1v or v in >2.5v 1ma i out 300ma 0.6 % output voltage noise 10hz to 100khz c in =1 f, i out =10ma 100 v r ms f=100hz 60 psrr power supply ripple rejection v in =v out +1v i out =100ma f=10khz 30 db esd rating human body mode 2 kv
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 5/10 um365xx typical performance characteristics quiescent current vs input voltage output voltage vs input voltage dropout voltage vs output current output voltage vs output current output voltage vs temperature load transient response 3.5 4.0 4.5 5.0 5.5 6.0 6.5 3.24 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 o u t pu t v o lt age (v) input voltage(v) um36533 100 125 150 175 200 225 250 275 300 100 150 200 250 300 350 400 450 500 550 600 650 dropout voltage(mv) output current(ma) um36533 0 50 100 150 200 250 300 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 v in =4.3v output voltage(v) output current(ma) um36533 20 30 40 50 60 70 80 90 100 110 120 130 3.24 3.26 3.28 3.30 3.32 3.34 3.36 3.38 3.40 3.42 3.44 3.46 3.48 3.50 v in =4.3v,i load =10ma output voltage(v) temperature( o c) um36533 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 36 38 40 42 44 46 48 50 52 54 56 58 quiescent current(ua) input voltage(v) um36533 i out =1ma to 150ma v out =3.3v (100mv/div) v in =4.3v , 50us/div
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 6/10 um365xx line transient response line transient response pin function in (pin 1): power for um365xxs and load. power is s upplied to the devices through the in pin. the in pin should be locally bypassed to gro und if the um365xxs series are more than a few inches away from another source of bulk capacitan ce. in general, the output impedance of a battery rises with frequency, so it is usually a dvisable to include an input bypass capacitor in battery-powered circuits. a cap acitor in the range of 0.1 f to 1 f is usually sufficient. the um365xxs series are designed to withstand reverse voltages on the in pin with respect to both ground and the output pin. in the case of a reve rsed input, which can happen if a battery is plugged in backwards, the um365xxs will act as if ther e is a large resistor in series with its input with only a small amount of current flow. out (pin 2): voltage regulated output. the out pin supplies power to the load. a minimum output capacitor of 1 f is required to ensure stability. larg er output capacitors may be required for applications with large transient loads to lim it peak voltage transients. see the applications information section for more information on output capacitance. gnd (pin3) : ground and heat sink. solder to a ground plane or large pad to maximize heat dissipation. typical application circuit out 1 f 1 f vout vin in gnd v in =4.3v to 5.3v(1v/div) v out =3.3v (100mv/div) v in =5.3v to 4.3v(1v/div) v out =3.3v (100mv/div) v in =4.3v,iout=10ma , 100us/div v in =4.3v,iout=10ma , 100us/div
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 7/10 um365xx applications information the um365xxs series are 300ma very low dropout regulators with micropower quiescent current . the maximum dropout is only 90mv at the load current of 150ma. output voltage noise is as low as 100 v rms over a 10hz to 100khz bandwidth. in addition to the low quiescent current, the um3 65xxs regulators incorporate several protection features which make them ideal for use in batte ry-powered systems. the devices are protected against both reverse input voltages and reverse voltages from output to input (reverse current protection). the devices also include current li mit and thermal overload protection, and will survive an output short circuit indefinitely. the fast transient response over comes the traditional tradeoff between dropout voltage, quiescent current and load transient response inherent in most regulators by using a proprietary new architecture. output capacitance and transient response the um365xxs regulators are designed to be stable with a wide range of output capacitors. the esr of the output capacitor affects stability, most notably with small capacitors. a minimum output capacitor of 1 f with an esr of 0.3 ? or less is recommended to ensure stability. the um365xxs series are micropower devices and output transient response will be a function of output capacitance. larger values of output capacita nce decrease the peak deviations and provide improved transient response for larger load current changes. the shaded region of figure 1 defines the region over which the um365xxs regulators are stable. the maximum esr allowed is 0.3 ? . high esr tantalum and electrolytic capacitors may be used, but a low esr ceramic capacitor must be in parallel at the output. there is no minimum esr requirement. figure 1 extra consideration must be given to the use of ceramic capacitors. ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applied voltage. the most common dielectrics used are z5u, y5v, x5r and x7r. the z5u and y5v dielectrics are good for providing high capacita nces in a small package, but exhibit strong voltage and temperature coefficients as shown in figures 2 and 3. when used with a 5v regulator, a 10 f y5v capacitor can exhibit an effective value as low as 1 f to 2 f over the operating temperature range. the x5r and x7r dielectrics result in more stable characteristics and are more suitable for use as the output capacitor. the x7 r type has better stability across temperature, while the x5r is less expensive a nd is available in higher values.
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 8/10 um365xx figure 2 figure 3 additionally, some ceramic capacitors have a piezoelectric response. a piezoelectric device generates voltage across its terminals due to mech anical stress, similar to the way a piezoelectric accelerometer or microphone works. for a ceram ic capacitor the stress can be induced by vibrations in the system or thermal transi ents. the resulting voltages produced can cause appreciable amounts of noise, especially when a ceramic capacitor is used for noise bypassing.
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 9/10 um365xx package information um365xxs: sot23-3 outline drawing dimensions millimeters inches symbol min max min max a 1.050 1.250 0.041 0.049 a1 0.000 0.100 0.000 0.004 a2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 d 2.820 3.020 0.111 0.119 e 1.500 1.700 0.059 0.067 e1 2.650 2.950 0.104 0.116 e 0.950ref 0.037ref e1 1.800 2.000 0.071 0.079 l 0.550ref 0.022ref l1 0.300 0.600 0.012 0.024 0 8 0 8 land pattern notes: 1. compound dimension: 2.921.60 2. unit: mm; 3. general tolerance 0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
________________________________________________________________________ http://www.union-ic.com rev.01 nov.2010 10/10 um365xx important notice the information in this document has been ca refully reviewed and is believed to be accurate. nonetheless, this document is subjec t to change without notice. union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. union rese rves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. union semiconductor, inc add: 7f, no. 5, bibo road, shanghai 201203 tel: 021-51097928 fax: 021-51026018 website: www.union-ic.com
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