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mic47050 500ma uldo? with low input and low output voltage uldo is a trademark of micrel inc. mlf and micro leadframe are registered trademarks of amkor technology, inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com april 2012 m9999-040312-b general description the mic47050 is a high-speed, ultra-low dropout, dual- supply nmos uldo? designed to take advantage of point-of-load applications that use multiple supply rails to generate a low-voltage, high-current power supply. the mic47050 can source 500ma of output current while only requiring a 1 f ceramic output capacitor for stability. a 1.5% output voltage accuracy , low dropout voltage (44mv @ 500ma), and low ground current makes this device ideally suited for mobile and point-of-load applications. the mic47050 has an nmos output stage offering very low output impedance. the nmos output stage makes for a unique ability to respond very quickly to sudden load changes such as that required by a microprocessor, dsp or fpga. the mic47050 consumes little quiescent current and therefore can be used for driving the core voltages of mobile processors, post regulating a core dc/dc converter in any processor. the mic47050 is available in fixed and adjustable output voltages in the tiny 2mm x 2mm mlf ? and thin mlf ? packages with an operating junction temperature range of ? 40 ? c to ? 125 ? c. data sheets and support documentation can be found on micrel?s web site at: www.micrel.com . features ? voltage range ? input voltage: 1.0v to 3.6v ? bias voltage: 2.3v to 5.5v ? 0.4v to 2.0v output voltage range ? low dropout voltage of 44mv at 500ma ? 1.5% initial output voltage accuracy ? high bandwidth ? very fast transient response ? stable with a 1f ceramic output capacitor ? logic level enable input ? uvlo on both supply voltages ? available in thermally-enhanced 2mm x 2mm mlf ? and thin mlf ? packages ? junction temperature range of ?40 ? c to +125 ? c applications ? point-of-load applications ? pdas, notebooks, and desktops ? datacom and telecom systems ? dsp, pld and fpga power supply ? low-voltage post regulation _________________________________________________________________________________________________________________________ typical application
micrel, inc. mic47050 april 2012 2 m9999-040312-b ordering information part number voltage (1) marking code (2) temperature range package lead finish (3) mic47050-1.2yml (4) 1.2 4 g z ? 40 ? c to ? 125 ? c 6-pin 2mm x 2mm mlf ? pb-free mic47050-1.8yml (4) 1.8 g g z ? 40 ? c to ? 125 ? c 6-pin 2mm x 2mm mlf ? pb-free mic47050yml (4) adj a g z ? 40 ? c to ? 125 ? c 6-pin 2mm x 2mm mlf ? pb-free mic47050-1.2ymt (5)(6) 1.2 zg4 ? 40 ? c to ? 125 ? c 6-pin 2mm x 2mm thin mlf ? pb-free mic47050-1.8ymt (5)(6) 1.8 zgg ? 40 ? c to ? 125 ? c 6-pin 2mm x 2mm thin mlf ? pb-free mic47050ymt (5) adj zga ? 40 ? c to ? 125 ? c 6-pin 2mm x 2mm thin mlf ? pb-free notes: 1. other voltage available. cont act micrel marketing for details. 2. overbar ( ) may not be to scale. 3. mlf ? is a green rohs compliant package. lead fini sh is nipdau. mold compound is halogen free. 4. mlf ? (ml) package (pin 1 identified = ). 5. thin mlf ? (mt) package (pin 1 identified = ). 6. contact factory for availability. pin configuration 6-pin 2mm x 2mm mlf ? - fixed (ml) 6-pin 2mm x 2mm mlf ? - adjustable (ml) 6-pin 2mm x 2mm thin mlf ? - fixed (mt) 6-pin 2mm x 2mm thin mlf ? - adjustable (mt)
micrel, inc. mic47050 april 2012 3 m9999-040312-b pin description fixed adj pin name pin function 1 1 bias bias supply. the bias supply is the power supply for the internal circuitry of the regulator. 2 2 gnd ground. ground pins and exposed pad must be connected externally. 3 3 in input supply. drain of nmos pass transistor which is the power input voltage for regulator. the nmos pass transistor steps down this input voltage to create the output voltage. 4 4 out output. output voltage of regulator. 5 ? pgood power good output. open-drain output. output is driven low when the output voltage is less than the power good threshold of its programmed nominal output voltage. when the output goes above the power good threshold, the open-drain output goes high-impedance, allowing it to be pulled up to a fixed voltage. ? 5 adj adjust input. connect external resistor divider to program the output voltage. 6 6 en enable: ttl/cmos compatible input. logic high = enable, logic low = shutdown. do not leave floating. ep ep gnd exposed thermal pad. connect to the ground plane to maximize thermal performance.
micrel, inc. mic47050 april 2012 4 m9999-040312-b absolute maximum ratings (1) in supply voltage (v in ) ................................... ?0.3v to +4v bias supply voltage (v bias )............................. ?0.3v to +6v enable voltage (v en )....................................... ?0.3v to +6v power good voltage (v pgood ) ....................... .?0.3v to +6v adj pin voltage (v adj )................................... .?0.3v to +6v out pin voltage (v out ) ................................... .?0.3v to v in lead temperature (sol dering,10 se c.)....................... 260 ? c storage temperature (t s ).........................?65 ? c to +150 ? c esd rating (3) ......................................................... 2kv hbm operating ratings (2) in supply voltage (v in ) ............ +1.0v to +3.6v (v in < v bias ) bias voltage (v bias )...................................... +2.3v to +5.5v enable voltage (v en )........................................... 0v to v bias power good voltage (v pgood ) ........................... .0v to v bias output voltage range ?? ???.. ................ 0.4v to 2.0v junction temperature (t j ) ........................ ?40c to +125c ambient temperature (t a ) .......................... ?40c to +85c junction thermal resistance 2mm x 2mm mlf ? -6l ( ? ja )................................90c/w 2mm x 2mm mlf ? -6l ( ? jc )................................45c/w 2mm x 2mm thin mlf ? -6l ( ? ja )........................90c/w 2mm x 2mm thin mlf ? -6l ( ? jc ) .......................45c/w electrical characteristics (4) v in = v out + 0.5v; v bias = v out +2.1v; c out = 1f; i out = 100a; t j = 25c, bold values indicate ?40c t j +125c, unless noted. parameter condition min. typ. max. units input supply input voltage range (v in ) 1.0 3.6 v v in uvlo threshold (5) v in rising 0.7 0.85 1.0 v v in uvlo hysteresis 40 mv ground current in shutdown (i gnd ) v en 0.2v (regulator shutdown) 0.1 1.0 ? a ground current (i gnd ) i out = 500ma; v in = v out + 0.5v 6 15 ? a ? bias supply bias input voltage (v bias ) 2.3 5.5 v v bias uvlo threshold (5) v bias rising 1.7 2.1 2.3 v v bias uvlo hysteresis 75 mv dropout voltage (v bias - v out ) i out = 100ma i out = 500ma 1.15 1.25 2.1 v v v bias supply current (i bias ) i out = 1ma; v bias = v out + 2.1v 330 500 ? a v bias supply current in shutdown (i bias ) v en 0.2v (regulator shutdown) 0.1 1.0 ? a output voltage dropout voltage (v in - v out ) i out = 100ma i out = 500ma 9 44 50 120 mv mv output voltage accuracy i out = 100 ? a i out = 100 ? a -1.5 -2.0 +1.5 +2.0 % % v bias line regulation v bias = v out + 2.1v to 5.5v -0.1 0.015 0.1 %/v
micrel, inc. mic47050 april 2012 5 m9999-040312-b electrical characteristics (4) v in = v out + 0.5v; v bias = v out +2.1v; c out = 1f; i out = 100a; t j = 25c, bold values indicate ?40c t j +125c, unless noted. parameter condition min. typ. max. units v in line regulation v in = v out + 0.5v to 3.6v -0.05 0.005 0.05 %/v load regulation i out = 10ma to 500ma 0.2 0.5 % current limit short circuit current limit v in = 2.7v; v out = 0v 0.6 1.6 2.5 a enable input en logic level high 1.0 0.77 v en logic level low 0.67 0.2 v en hysteresis 100 mv enable bias current v en 0.2v (regulator shutdown) v en = 1.0v (regulator enabled) 1 6 2 10 ? a ? a turn-on time c out = 1 ? f; 90% of typical v out 15 500 ? s thermal protection over-temperature shutdown t j rising 160 ? c over-temperature shutdown hysteresis 20 ? c power good 95 power good threshold voltage v out rising v out falling 85 91 89 % % power good hysteresis 2 % power good output low voltage i pg = 250 ? a 0.02 0.1 v power good leakage current v pg = 5.0v -1 0.01 +1 ? a reference voltage (adjustable option only) feedback reference voltage i out = 100 ? a i out = 100 ? a 0.394 0.392 0.4 0.406 0.408 v v fb bias current v fb = 0.8v 20 na output voltage noise and ripple rejection output voltage noise f = 10hz to 100khz; i out = 100ma; c out =1 ? f 63 ? v rms ripple rejection f = 10khz; c out = 1.0 ? f, i out = 100ma f = 100khz; c out = 1.0 ? f, i out = 100ma 50 37 db db notes: 1. exceeding the absolute maxi mum rating may damage the device. 2. the device is not guaranteed to function outside its operating rating. 3. devices are esd sensitive. handling precautions recommended. human body model, 1.5k ? in series with 100pf. 4. specification for packaged product only. 5. both vin and vbias uvlo thresholds must be met for the output voltage to turn-on. if either of the two input voltages is b elow the uvlo thresholds, the output is disabled.
micrel, inc. mic47050 april 2012 6 m9999-040312-b typical characteristics output voltage v s. input voltage 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 01234 input voltage (v) output voltage (v) v bias = 5.0v v out = 1.8v i out = 500ma input dropout voltage vs. output current 0 5 10 15 20 25 30 35 40 45 50 0 100 200 300 400 500 output current (ma) dropout voltage (mv ) v bias = 5.0v v out = 1.2v input dropout voltage vs. temperature 0 10 20 30 40 50 60 70 -40 -20 0 20 40 60 80 100 120 temperature (c) dropout voltage (mv ) i out = 500ma i out = 100ma v bias = 3.6v v out = 1.2v output voltage vs. bias voltage 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2345 bias voltage (v) output voltage (v) v in = 2.5v v out = 1.8 v i out = 500ma i out = 100ma bias dropout voltage vs. output current 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 100 200 300 400 500 output current (ma) dropout voltage (v) v out = 2.0v v in = 2.5v v out = 1.2v bias dropout voltage vs. temperature 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 -40 -20 0 20 40 60 80 100 120 temperature (c) dropout voltage (v) v in = 2.5v i out = 500ma v out = 2.0v v out = 1.2v bias current vs. bias voltage 240 260 280 300 320 340 360 380 400 420 440 33.544.555.5 b i as vo l t ag e ( v) bias current (a ) v in = 1.8v i out = 1ma bias current vs. output current 320 322 324 326 328 330 332 334 336 338 340 0 100 200 300 400 500 output current (ma) bias current (a ) v bias = 3.6v v in = 1.8v v out = 1.2v bias current vs. temperature 240 260 280 300 320 340 360 380 400 -40 -20 0 20 40 60 80 100 120 temperature (c) bias current (a ) v bias = 3.6v v in = 1.8v v out = 1.2v
micrel, inc. mic47050 april 2012 7 m9999-040312-b typical characteristics (continued) ground current vs. input voltage 0 5 10 15 20 25 30 1.2 1.6 2 2.4 2.8 3.2 3.6 input voltage (v) ground current (a) v bias = 5.0v v out = 1.2v i out = 500ma ground current vs. temperature 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00 -40 -20 0 20 40 60 80 100 120 temperature (c) ground current (a) v bias = 3.6v v in = 1.8v v out = 1.2v i out = 500ma output voltage vs. output current 1.190 1.192 1.194 1.196 1.198 1.200 1.202 1.204 1.206 1.208 0 100 200 300 400 500 output current (ma) output voltage (v) v bias = 3.6v v in = 1.8v current limit vs. input voltage 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.5 2 2.5 3 3.5 4 input voltage (v) current limit (a) v bias = 5.0v v out = 1.2v current limit vs. temperature 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 -40 -20 0 20 40 60 80 100 120 temperature (c) current limit (a) v bias = 3.6v v in = 1.8v v out = 1.2v output voltage vs. temperature 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 -40 -20 0 20 40 60 80 100 120 temperature (c) output voltage (v) v bias = 3.6v v in = 1.8v i out = 100a power supply ripple rejection (input voltage) 0 10 20 30 40 50 60 70 80 90 0.01 0.1 1 10 100 1000 frequency (khz) psrr (db) v bias = 3.6v v in = 1.8v 300mv v out = 1.2v i out = 500ma power supply ripple rejection (bias voltage) 0 10 20 30 40 50 60 70 80 90 0.01 0.1 1 10 100 1000 frequency (khz) psrr (db) v bias = 3.6v 300mv v in = 1.8v v out = 1.2v i out = 500ma output noise 0.001 0.01 0.1 1 10 0.01 0.1 1 10 100 1000 frequency (khz) output noise (v/ hz) v bias = 3.6v v in = 1.8v v out = 1.2v noise (10hz-100khz) = 56.19v rms
micrel, inc. mic47050 april 2012 8 m9999-040312-b functional characteristics
micrel, inc. mic47050 april 2012 9 m9999-040312-b functional diagram mic47050 fixed output block diagram mic47050 adjustable output block diagram
micrel, inc. mic47050 april 2012 10 m9999-040312-b functional description the mic47050 is a high-speed, ultra-low dropout, dual supply nmos uldo? designed to take advantage of point-of-load applications that use multiple supply rails to generate a low-voltage, high-current power supply. the mic47050 can source 0.5a of output current while only requiring a 1f ceramic output capacitor for stability. the mic47050 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. bias supply voltage v bias , requiring relatively light current, provides power to the control portion of the mic47050. bypassing on the bias pin is recommended to improve performance of the regulator during line and load transients. small 0.1f ceramic capacitors from v bias -to-ground help reduce high frequency noise from being injected into the control circuitry from the bias rail and are good design practice. input supply voltage v in provides the supply to power the ldo. the minimum input voltage is 1.0v. this allows conversion from low voltage supplies to reduce the power dissipation in the pass element. input capacitor the mic47050 is a high-performance, high bandwidth device. therefore, it requires a well-bypassed input supply for optimal performance. a 1f capacitor is the minimum required for stability. a 10f ceramic capacitor is recommended for most applications, especially if the ldo?s headroom (v in ?v out ) is small and/or large load transients are present. fast load transient and low headroom requires a larger input filter capacitor to ensure that the regulator does no t drop out of regulation. a 10f will better attenuate any voltage glitches from exceeding the maximum voltage rating of the part. additional high-frequency capacitors, such as small- valued npo dielectric-type capacitors, help filter out high-frequency noise and are good practice in any rf- based circuit. x7r and x5r dielectric ceramic capacitors are recommended because of their temperature performance. x7r-type capacitors change capacitance by 15% over their operat ing temperature range and are the most stable type of ceramic capacitors. z5u and y5v dielectric capacitors are not recommended since they 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. tantalum capacitors have a ve ry stable dielectric (10% over their operating temperature range) and can also be used with this device. see the typical characteristic section for examples of load transient response. output capacitor the mic47050 requires an output capacitor of 1f or greater to maintain stability. the design is optimized for use with low-esr ceramic chip capacitors. high-esr capacitors may cause high- frequency oscillation. the output capacitor can be increased, but performance has been optimized for a 1f ceramic output capacitor and does not improve significantly with larger capacitance. the output capacitor type and placement criteria are the same as the input capacitor. see the ?input capacitor? subsection for a detailed description. minimum load current the mic47050, unlike most other regulators, does not require a minimum load to maintain output voltage regulation. adjustable regulator design the mic47050 adjustable version allows programming the output voltage from 0.4v to 2.0v. two external resistors are required. the r1 resistor value between v out and the adj pin should not exceed 10k ? , as larger values can cause instability. r2 connects between the adj pin and ground. the resistor values are calculated as follows: ? ? ? ? ? ? ? ? ? ? ? 1 ref v out v r2 r1 where v out is the desired output voltage and v ref is the internal reference voltage. enable/shutdown the mic47050 comes with a single active-high enable pin that allows the regulator to be disabled. forcing the enable pin low disables the regulator and sends it into a ?zero? off-mode-current state. in this state, current consumed by the regulator goes nearly to zero. forcing the enable pin high enables the output voltage. the active-high enable pin uses cmos technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output.
micrel, inc. mic47050 april 2012 11 m9999-040312-b power good (pgood) the power good (pgood) pin is an open drain output that goes low when the output voltage (fixed version) drops below the pgood threshold voltage. the pull-up resistor value should be large enough to guarantee a proper ?low? voltage when the pgood pin pulls low. the pgood low vo ltage is typically 0.1v at 250a current. a 10k ? resistor or greater is recommended when pulling up to 3.3v bias. if the pgood function is not required, the pgood pin may be left unconnected. thermal shutdown the mic47050 has an internal over-temperature protection feature. this feature is for protection only. the device should never be in tentionally operated near this temperature as this may reduce long term reliability. the device will turn off wh en the over-temperature threshold is exceeded. a 20c hysteresis is built in to allow the device to cool before turning back on. thermal considerations the mic47050 is designed to provide 0.5a of continuous current in a very small package. maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. given that the input voltage is 1.8v, the output voltage is 1.2v and the output current is 0.5a. the actual power dissipation of the regulator circuit can be determined using the equation: ? ? ? ? ? ? ? ? ? because this device is cmos, the ground current is insignificant for power dissipation and can be ignored for this calculation. ?? 0.3w 0.5a 1.2v 1.8v d p ? ? ? ? to determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: ? ? ? ? ? ? ? ? ? ? ja a t j(max) t d(max) p t j(max) = 125c, the maximum junction temperature of the die. ja thermal resistance = 90c/w. table 1 shows junction-to-ambi ent thermal resistance for the mic47050 in the mlf ? or thin mlf ? package. package ja recommended min. footprint jc 6-pin 2mm x 2mm mlf ? 90c/w 45c/w 6-pin 2mm x 2mm thin mlf ? 90c/w 45c/w table 1. thermal resistance substituting p d for p d(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. the junction-to- ambient thermal resistance for the minimum footprint is 90c/w. the maximum power dissipation must not be exceeded for proper operation. for example, when operating the mic47050-1.2yml at an input voltage of 1.8v and a 0.5a load with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: c 98 a t 0.3w c/w 90 c 125 a t d(max) p ja j(max) t a t ? ? ? ? ? ? ? ? ? ? therefore, a 1.2v application with 0.5a of output current can accept an ambient operating temperature of 98c in a 2mm x 2mm mlf ? or thin mlf ? package. thermal measurements measuring the ic?s case temperature is recommended to insure it is within its operating limits. although this might seem like a very elementary task, it is easy to get erroneous results. the most common mistake is to use the standard thermal couple that comes with a thermal meter. this thermal couple wire gauge is large, typically 22 gauge, and behaves like a heatsink, resulting in a lower case measurement. two methods of temperature measurement are using a smaller thermal couple wire or an infrared thermometer. if a thermal couple wire is used, it must be constructed of 36 gauge wire or higher (smaller wire size) to minimize the wire heat-sinking effect.
micrel, inc. mic47050 april 2012 12 m9999-040312-b in addition, the thermal couple tip must be covered in either thermal grease or thermal glue to make sure that the thermal couple junction is making good contact with the case of the ic. omega brand thermal couple (5sc- tt-k-36-36) is adequate for most applications. wherever possible, an infrared thermometer is recommended. the measurement spot size of most infrared thermometers is too large for an accurate reading on a small form factor ics. however, a ir thermometer from optris has a 1mm spot size, which makes it a good choice for the 2mm x 2mm mlf ? or thin mlf ? package. an optional stand makes it easy to hold the beam on the ic for long periods of time. for a full discussion of heat sinking and thermal effects of voltage regulators, refer to the ?regulator thermals? section of micrel?s designing with low-dropout voltage regulators handbook. this information can be found on micrel's website at: http://www.micrel.com/_pdf/other/ldobk_ds.pdf
micrel, inc. mic47050 april 2012 13 m9999-040312-b mic47050 typical application schematic mic47050 adjustable output mic47050 fixed output
micrel, inc. mic47050 april 2012 14 m9999-040312-b mic47050 bill of materials item part number manufacturer description qty. grm21br60j106me19 murata (1) ceramic capacitor, 10f, 6.3v, x5r, 0603 size c1 c1608x5r0j106mt tdk (2) ceramic capacitor, 10f, 6.3v, x5r, 0603 size 1 grm155r61a105ke15d murata (1) capacitor, 1f, 10v, x5r, 0402 size c2 c1005x5r0j105kt tdk (2) capacitor, 1f, 10v, x5r, 0402 size 1 c3 06035d104mat2a avx (3) ceramic capacitor, 0.1f, 50v, x5r, 0603 size 1 r1 crcw06031001frt1 vishay dale (4) resistor, 1k (0603 size), 1% 1 r2 crcw06036650frt1 vishay dale (4) resistor, 665 (0603 size), 1% 1 r3 crcw06031002frt1 vishay dale (4) resistor, 10k (0603 size), 1% 1 mic47050yml low input and output 500ma uldo? - adjustable output mic47050ymt low input and output 500ma uldo? - adjustable output mic47050-1.2yml low input and output 500ma uldo? - fixed 1.2v output mic47050-1.2ymt low input and output 500ma uldo? - fixed 1.2v output mic47050-1.8yml low input and output 500ma uldo? - fixed 1.8v output u1 mic47050-1.8ymt micrel, inc. (5) low input and output 500ma uldo? - fixed 1.8v output 1 notes: 1. murata: www.murata.com . 2. tdk: www.tdk.com . 3. avx: www.avx.com . 4. vishay: www.vishay.com . 5. micrel, inc.: www.micrel.com .
micrel, inc. mic47050 april 2012 15 m9999-040312-b package information 6-pin 2mm ? 2mm thin mlf ? (mt)
micrel, inc. mic47050 april 2012 16 m9999-040312-b package information (continued) 6-pin 2mm x 2mm mlf ? (ml) 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 makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2012 micrel, incorporated.

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