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mic2033 high - accuracy, high - side, fixed current limit power switch micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944 - 0800 ? fax + 1 (408) 474 - 1000 ? http://www.micrel.com n ove m ber 11 , 2015 revision 1.1 general description the mic2033 is a high - side mosfet power distribution switch providing increased system reliability utilizing 5% c urrent limit accuracy . the mic2033 has an operating input voltage range from 2.5v to 5.5v, is internally current limited and has thermal shutdown to protect the device and system . the mic2033 is offered with either active - high or active - low logic level enable input controls, has a n open drain fault status output flag with a built - in 32ms delay that assert s low during over cu rrent or thermal shutdown conditions. the mic2033 is available in several different fixed current limit options: 0.5a, 0.8a, 1a, and 1.2a. a capacitor adjustable soft - start circuit minimizes inrush current in applications where high capacitive loads are used. the mic 2033 is offered in both 6 - pin sot - 23 and 6 - pin 2mm x 2 mm t hin dfn packages . the mic 2033 has an operating junction temperature range of ? 40 c to + 12 5 c. data sheets and support documentation can be found on micrels web site at: www.micrel.com . features ? 5% c urrent limit accuracy ? input supply range from 2.5v to 5.5 v ? low q uiescent c urrent : 100a typical (switch on) ? 75m typical r ds(on) at 5v ? current l imit options: 0.5a, 0.8a, 1a, and 1.2a ? soft -s tart control via an external capacitor ? undervoltage lockout (uvlo) ? fast response time (10 s) to short circuit loads ? fault status output flag ? logic controlled enable (a ctive - high, a ctive - low) ? thermal shutdown ? pin compatible with mic2005 ? 6- pin 2 mm 2 mm th in dfn and 6 -p in sot - 23 package s ? junction temperature range from ? 40 c to + 12 5 c applications ? usb peripherals and usb 2.0/3.0 c ompatible ? dtv/stb ? notebooks and consumer electronics ? general purpose power distribution ____________________________________________________________________________________________________________ typical application downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 2 revision 1.1 ordering information part number top mark (1) current limit enable package mic2033 - 05a ym6 35a 0.5a active high sot - 23 - 6l mic 2033 - 05b ym6 35b 0.5a active low sot - 23 - 6l mic2033 -05aymt (2) 3a5 0.5a active high 6-p in 2mm x 2 mm thin dfn mic2033 -05bymt (2) 3b5 0.5a active low 6- pin 2mm x 2mm thin dfn mic2033 -55aym6 (3) 55a 0.55a active high sot - 23 - 6l mic2033 -55aymt (2 )( 3) 5a5 0.55a active high 6- pin 2mm x 2mm thin dfn mic2033 -08aym6 38a 0.8a active high sot - 23 - 6l mic2033 -08bym6 38b 0.8a active low sot - 23 - 6l mic2033 -08aymt (2) 3a8 0.8a active high 6- pin 2mm x 2mm thin dfn mic2033 -08bymt (2) 3b8 0.8a active low 6- pin 2mm x 2mm thin dfn mic2033 -10aym6 31a 1.0a active high sot - 23 - 6l mic2033 -10bym6 31b 1.0a active low sot - 23 - 6l mic2033 -10aymt (2) 3a1 1.0a active high 6- pi n 2mm x 2mm thin dfn mic2033 -10bymt (2) 3b1 1.0a active low 6- pin 2mm x 2mm thin dfn mic2033 -12aym6 32a 1.2a active high sot - 23 - 6l mic2033 -12bym6 32b 1.2a active low sot - 23 - 6l mic2033 -12aymt (2) 3a2 1.2a active high 6- pin 2mm x 2mm thin dfn mic2033 -12bymt (2) 3b2 1.2a active low 6- pin 2mm x 2mm thin dfn notes: 1. under bar symbol ( _ ) may not be to scale. 2. thin dfn is a green rohs compliant package. lead finish is nipdau. mold compound is halogen free. 3. contact micrel for availability. downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 3 revision 1.1 pin configuration vin fault/ cslew vout en gnd 4 5 6 1 2 3 vin fault/ cslew vout gnd ep en 6 1 2 3 5 4 sot - 23 6- lead (m6 ) top view 2 mm x 2 mm 6-p in thin dfn (mt) (1) top view notes: 1. thin dfn = pin 1 identifier. pin description pin number pin name pin function sot - 23 - 6l 6-p in 2mm x 2 mm thin dfn 1 6 v in input: power s witch and logi c supply input . 2 5 gnd ground: input and output return pin. 3 4 en enable (input) : logic compatible, enable control input that allows turn - on/ - off of the switch . do not leave the en pin floating. 4 3 fault/ fault status flag (output): active - low, o pen - drain output. a logic low state indicates an over current or thermal shutdown condition. an o ver current condition must last longer than t f ault / in order to assert fault/ . a pull - up resistor (10k recommended) to an external supply is required. 5 2 c slew slew rate control : adjustable soft -start input . adding a small value capacitor from c slew to vin slows the turn - on time of the power mosfet. 6 1 v out switch output : power switch output. ep ep ad exposed pad: exposed pad on bottom side of package. connect to el ectrical ground for optimum thermal dissipation . downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 4 revision 1.1 absolute maximum ratings (1 ) v in to gnd ....................................................... ? 0.3v to +6v v out to gnd ...................................................... ? 0.3 v to v in v cslew to gnd ................................................. ? 0.3v to +6v v en to gnd ...................................................... ? 0.3v to +6v v fault/ to gnd ................................................. ? 0.3v to +6v fault/ current (i f au lt/ ) .............................................. 25ma maximum power dissipation (p d ) ............. internally limited lead temperature (soldering, 10 sec.) ...................... 260c storage temperature (t s ) ......................... ? 65c to +150 c esd rating (2) hbm ......................................................................... 3 kv mm ......................................................................... 3 00v operating ratings (3) supply voltage (v in ) ..................................... +2 .5 v to +5 .5v v en , v fault/ ................................................... ? 0.3v to +5.5 v v cslew , v out ...................................................... ? 0.3 v to v in ambient temperature range (t a ) .............. C 40c to + 8 5c junction temperature (t j ) ........................ C 40c to + 12 5c package thermal resistance sot - 23 - 6 ( ja ) .............................................. 177.2 c/w 6-p in 2 mm 2mm dfn ( ja ) ............................. 9 0c/ w electrical characteristics (4) v in = v en = 5v; c in = 1 f ; c c slew = 0.1 f; c out = 1 f; t j = 25c. bold values indicate C 40c t j + 12 5c, unless noted. symbol parameter condition min. typ. max. units power supply input v in input voltage range 2. 5 5.5 v v uvlo input supply undervoltage lockout threshold v in rising 2.0 2.25 2.5 v v in falling 1.9 2.15 2.4 v uvlohys input supply undervoltage lockout threshold hysteresis v in rising or v in falling 100 mv i dd supply current switch off; active hi gh enable (a): v en = 0v, v in = 5v, i out = 0a 0.75 5 a switch off; active low enable (b): v en = v in = 5v, i out = 0a switch on; active high enable (a): v en = 1.5v, v in = 5v, i out = 0a 100 300 a switch on; active low enable (b): v en = 0v, v in = 5v, i out = 0a power mosfet r ds - on switch on - resistance v in = 2.5v, i out = 350ma 100 177 m ? v in = 3.3v, i out = 350ma 85 145 v in = 5v, i out = 350ma 75 125 i lkg output leakage current switch off, v out = 0v 0.22 15 a downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 5 revision 1.1 electrical characteristics (4) (continued) v in = v en = 5 v; c in = 1 f ; c c slew = 0.1 f; c out = 1 f; t j = 25c. bold values indicate C 40c t j + 12 5c, unless noted. symbol parameter condition min. typ. max. units current limit i limit current limit accuracy mic2033 - 05xxxx , v out = 0.8*v in 0.475 0.5 0.525 a mic2033 - 08xxxx, v out = 0.8*v in 0.76 0.8 0.84 mic2033 - 10xxxx, v out = 0.8*v in 0.95 1.0 1.05 mic2033 - 12xxxx, v out = 0.8*v in 1.14 1.2 1.26 i/o v en enable voltage logic low 0.5 v logic high 1.5 i en enabl e input current 0v v en 5v 1 a r flag fault flag output resistance i out = 10ma 25 ? i flag_off fault flag off current v flag = v in 10 a r fault/ fault/ output resistance i out = 10ma 25 i fault/_off fault/ off current v fault/ = v in 10 a i cslew cslew input cu rrent (6) v cslew = v in 0.6 a thermal protection t tsd thermal shutdown temperature t j rising 157 c t tsdhys thermal shutdown hysteresis 15 c downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 6 revision 1.1 electrical characteristics (4) (continued) v in = v en = 5 v; c in = 1 f ; c c slew = 0.1 f; c out = 1 f; t j = 25c. bold values indicate C 40c t j + 12 5c, unless noted. symbol parameter condition min. typ. max. units timing specifications (ac parameters) t rise output turn - on rise time (6) r load = 10 ; c out = 1 f 700 s t fall output turn - off fall time (6) v en = off; r load = 10 ; c out = 1 f 32 s t on_dly output turn - on delay (6) r load = 10 ; c out = 1 f 700 s t off_dly output turn - off delay (6) r load = 10 ; c out = 1 f 5 s t sc_resp short circuit response time ( 6, 7) v out = 0v (short circuit) ; c cslew = 0.1 f 10 ms t sc_resp short circuit response time (6) v out = 0v (short circuit) ; c cslew = open 10 s t fault/ overcurrent fault response delay time (6) 16 32 49 ms notes: 1. exceeding the absolute maximum rating may damage the device. 2. devices are esd sensitive. handling precautions recommended. human body model (hbm), 1.5 k ? in series with 100pf. 3. the device is not guaranteed to function outside its operating rating. 4. specification for packaged product only. 5. preliminary. 6. see timing diagrams (figures 1 - 3) . 7. c c slew values above 0.1 f are not recommended. downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 7 revision 1.1 timing diagrams vout 00 t rise t fall t v 10% 10% 90% 90% en figure 1. output rise/fall time vout en 00 t on_dly t off_dly t v 10% 50% 50% 90% figure 2. turn - on/off delay downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 8 revision 1.1 timing diagrams (continued) iout fault/ 00 t sc_resp t fault/ t v vout 0 i limit figure 3. short circuit resp onse time and over current fault flag delay downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 9 revision 1.1 typical characteristics input supply current vs. temperature 0 25 50 75 100 125 150 175 200 -50 -25 0 25 50 75 100 125 temperature (c) supply current (a) v in = 5v i ou t = 0ma vin off current vs. temperature 0.00 0.25 0.50 0.75 1.00 1.25 1.50 -50 -25 0 25 50 75 100 125 temperature (c) supply off current (a) v in = 5v v en = off i ou t = 0ma undervoltage lockout vs. temperature 1.50 1.75 2.00 2.25 2.50 -50 -25 0 25 50 75 100 125 temperature (c) uvlo threshold (v) v in falling v in rising r ds(on) vs. temperature 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 temperature (c) r ds (on) (m) v in = 5v i ou t = 350ma mic2033-05xx r ds(on) vs. temperature 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 temperature (c) r ds (on) (m) v in = 5v i ou t = 350ma mic2033-12xx r ds(on) vs. output current 0 25 50 75 100 125 0 100 200 300 400 500 output current (ma) r ds (on) (m) v in = 5v t a = 25c mic2033-05xx r ds(on) vs. output current 0 25 50 75 100 125 0 100 200 300 400 500 output current (ma) r ds (on) (m) v in = 3.3v t a = 25c mic2033-05xx r ds(on) vs. output current 0 25 50 75 100 125 0.00 0.25 0.50 0.75 1.00 1.25 output current (a) r ds (on) (m) v in = 5v t a = 25c mic2033-12xx r ds(on) vs. output current 0 25 50 75 100 125 0.00 0.25 0.50 0.75 1.00 1.25 output current (a) r ds (on) (m) v in = 3.3v t a = 25c mic2033-12xx downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 10 revision 1.1 typical characteristics (continued) current limit vs. temperature 400 450 500 550 600 -50 -25 0 25 50 75 100 125 temperature (c) current limit (ma) v in = 5v v out = 4v mic2033-05xx current limit vs. temperature 0 200 400 600 800 1000 1200 -50 -20 10 40 70 100 130 temperature (c) current limit (ma) v in = 5v v out = 4v mic2033-08xx current limit vs. temperature 0.00 0.25 0.50 0.75 1.00 1.25 1.50 -50 -20 10 40 70 100 130 temperature (c) current limit (a) v in = 5v v out = 4v mic2033-10xx current limit vs. temperature 1.10 1.15 1.20 1.25 1.30 -50 -25 0 25 50 75 100 125 temperature (c) current limit (a) v in = 5v v out = 4v mic2033-12xx vin - vout vs. output current 0 10 20 30 40 50 0 100 200 300 400 500 output current (ma) vin - vout (mv) v in = 5v t a = 25c mic2033-05xx vin - vout vs. output current 0 25 50 75 100 125 0.00 0.25 0.50 0.75 1.00 1.25 output current (a) vin - vout (mv) v in = 5v t a = 25c mic2033-12xx fault/ pin resistance vs. temperature 0 5 10 15 20 25 -50 -25 0 25 50 75 100 125 temperature (c) fault/ pin resistance () v in = 5v i flag = 10ma fault/ response time vs. temperature 0 10 20 30 40 50 -50 -25 0 25 50 75 100 125 temperature (c) fault/ response time (ms) v in = 5v mic2033-xxxx downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 11 revision 1.1 functional characteristics downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 12 revision 1.1 functional characteristics (continued) downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 13 revision 1.1 functional diagram figur e 4 . mic 20 33 block diagram downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 14 revision 1.1 functional description the mic2033 is a high - side mosfet power distribution switch providing increased system reliability utilizing 5% current limit accuracy. the mic2033 has an operating input voltage range from 2.5v to 5.5v and is internally current limited and has thermal shutdown that protects the device and system . soft - start soft - start reduces the power supply input surge current at startup by controlling the output voltage rise time. the input surge appears while the output capacitor is charged up. a slower output rise time will draw a lower input surge current. during soft - start, an internal current s ink dis charges the external capacitor at cslew to ground to control the ramp of the output voltage. the output voltage rise time is dependent upon the value of c c slew , the input voltage, output voltage , and the current limit . the value of the csle w external capacitor is recommended to be in the range of 0 f to 0. 1f. input capacitor a 1 f to 10 f ceramic input capacitor is re commended for most applications. the input capacitor must be placed on the same side of the board and next to the mic 20 33 to minimize the voltage ringing during transient and short circuit conditions. it is also recommended to use two vias for each end of the capacitor to connect to the power and ground plane. x7r or x5r dielectric ceramic capacitors are recommended because of their temperature performance. x7r - type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. z5u and y5v dielectric capacitors change value by as much as 50% and 60% respectively over their operating temperature ranges. to use a ceramic chip capacitor with y5v dielectric, the value must be much higher than an x7r ceramic or a tantalum capacitor to ensure the same capacitance value over the operating temperature range. output capac itor the output capacitor type and placement criteria are the same as the input capacitor. see the input capacitor section for a detailed description . enable the mic2033 offers either an active high or active low enable input (en) that allows on/off contro l of the switch output . the c urrent through the device reduces to near zero when the device is shutdown, with only m icroamperes of leakage current. the en input may be directly tied to v in or driven by a voltage that is equal to or less than v in , but do not leave this pin floating. current limit the mic2 0 33 is available with four fixed current limit settings: 0.5a, 0.8a, 1a, and 1.2a. if the output current exceeds the set current limit, then the mic203 3 switch will enter constant current limit mode. the maximum allowable current limit may be less than the full specified and/or expected current if the mic203 3 is not mounted on a circuit board with sufficiently low thermal resistance. the mic2033 responds within 10s to short circuits to limit the output current and also provides an output fault flag that will assert (low) for an over current condition that lasts longer than 32ms. thermal design to help reduce the thermal resistance, the epad (underneath the ic) should be soldered to the pcb ground and the placement of thermal vias either underneath or near the epad is highly recommended. thermal design requires the following application - speci?c parameters: ? maximum ambient temperature (t a ) ? output current (i out ) ? input voltage (v in ) ? current limit (i limit ) when the mic203 3 is in constant current limit mode , it may exceed the over temperature threshold. if this occurs, the over temperature condition will shut down the mic203 3 switch and the fault status flag will go active (assert low) . after the switch cools down, it will turn on again. the mic203 3 power dissipation can be maximized by either lowering the thermal resistance on the exposed pad (only the dfn package has an exposed pad) on the printed circuit board, or by limiting the maximum allowable ambient temperature. thermal measurements it is always wise to measure the ics case temperature to make sure that it is within its operating limits. although this might seem like a very elementa ry task, it is very easy to get erroneous results. the most common mistake is to use the standard thermal couple that comes with the thermal voltage meter. this thermal couple wire gauge is large, typically 22 gauge, and behaves like a heatsink, resulting in a lower case measurement. there are two suggested methods for measuring the ic case temperature: a thermal couple or an infrared thermometer. if a thermal couple is used, it must be constructed of 36 gauge wire or higher to minimize the wire heatsinking effect. in addition, the thermal couple tip must be covered in either thermal grease or thermal glue downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 15 revision 1.1 to make sure that the thermal couple junction is making good contact to the case of the ic. this thermal c ouple from omega (5sc - tt -k- 36 - 36) is adequate for most applications. to avoid this messy thermal couple grease or glue, an infrared thermometer is recommended. most infrared thermometers spot size is too large for an accurate reading on small form factor ics. however, an ir thermometer from optris has a 1mm spot size, w hich makes it ideal for the 3mm 3mm dfn package. also, get the optional stand. the stand makes it easy to hold the beam on the ic for long periods of time. downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 16 revision 1.1 evaluation board schematic bill of materials item part number manufacturer description qty. c1 c 1608x5r0j105k tdk (1) 1f/6.3v ceramic capacitor, x5 r , 0603 1 06036d105kat2a avx (2) c2 cl31a107mqhnnne samsung (3) 1 00 f/6.3v ceramic capacitor, x5 r , 1206 1 c3 06033c104kat2a tdk 0.1f/25v ceramic capacitor, x7r, 0603 1 c1608x7r1e104k avx r1 , r2 crcw0603 10k 0fkea vishay (4) 10 k , film resistor, 0603 , 1% 2 u1 mic 2033 -xxxymt micrel , inc. (5) high -a ccuracy , h igh -s ide, f ixed cu rrent l imit p ower switch 1 notes: 1. tdk: www.tdk.com . 2. avx.: www.avx.com . 3. samsung: www .semlcr.com 4. vishay : www.vishay.com . 5. micrel, inc.: www.micrel.com downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 17 revision 1.1 pcb layout (mic2033-xxxymt evaluation board) mic2033 - xx xymt evaluation board C top layer mic2033 - xx xymt evaluation board C bottom layer downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 18 revision 1.1 pcb layout (mic2033- xxxym 6 evaluation board) mic2033 - xxxym6 evaluation board C top layer mic2033 - xxxym6 evaluation board C bottom layer downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 19 revision 1.1 package information 6-pin 2 mm x 2 mm thin dfn (mt) downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 20 revision 1.1 package information (continued) sot23 - 6l (m 6) downloaded from: http:///
micrel, inc. mic2033 november 11 , 2015 21 revision 1.1 micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944 - 0800 fax +1 (408) 474 - 1000 web http://www.micrel.com micrel, inc. is a leading global manufacturer of ic solutions for the worldwide high - performance linear and power, lan, and timing & communications markets. the companys products include advanced mixed - signal, analog & power semiconductors; high - performance communication, clock management, mems - based clock oscillators & crystal - less clock generators, ethernet switches, and physical layer transceiver ics. company custom ers include leading manufacturers of enterprise, consumer, industrial, mobile, tele communications, automotive, and computer p roducts. corporation headquarters and state - of - the - art wafer fabrication facilities are located in san jose, ca, with regional sales and support offices and advanced technology design centers situated throughout the americas, europe, and asia. additionally, the company maintains an extensive network of distributors and reps worldwide. micrel makes no representations or warranties with respect to the accuracy or comp leteness of the information furnished in this datasheet. this information is not intended as a warranty and micrel does not assume responsibility for its us e. micrel reserves the right t o change circuitry, specification s and descriptions at any time without notice. no license, whether express, implied, arisi ng by estoppel or otherwise, to an y intellectual property rights is granted by this document. except as provided in micrels terms and condit ions of sale for such products, micrel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/ or use of micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent , copyright, or other intellectual property right. micrel products are not designed or authorized for use as components in life support appl iances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. life support devices or systems are device s or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to res ult in a significant injury to the user. a purchasers use or sale of micrel products for use in life support appliances, devic es or systems is a purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 201 2 micrel, incor porated. downloaded from: http:///

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