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mp62170-1/mp62171-1 3.3v/5v, single-channel 1.5a current-limited power distribution switch with output discharge mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 1 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. the future of analog ic technology description the mp62170-1/mp62171-1 power distribution switch features internal current limiting to prevent damage to host devices due to faulty load conditions. the mp62170-1/mp62171-1 analog switch has 75m ? on-resistance and operates from 2.7v to 5.5v input. it is available with guaranteed current limits, making it ideal for load switching applications. the mp62170- 1/mp62171-1 has built-in protection for both over current and increased thermal stress. for over current, the device will limit the current by changing to a constant current mode. as the temperature increases as a result of short circuit, then the device will shut off. the device will recover once the device temperature reduces to approx 120 c. mp62170-1/mp62171-1 involves discharge function that provides a resistive discharge path for the external output capacitor when the part is disabled. mp62170-1/mp62171-1 is available in 8-pin msop and soic package without exposed pad. features ? 1.5a continuous current ? accurate current limit ? output discharge function ? 2.7v to 5.5v supply range ? 90ua quiescent current ? 75m ? mosfet ? thermal-shutdown protection ? under-voltage lockout ? 8ms flag deglitch time ? no flag glitch during power up ? reverse current blocking ? active high & active low options ? soic8 & msop8 packages applications ? smartphone and pda ? portable gps device ? notebook pc ? set-top-box ? telecom and network systems ? pc card hot swap ? usb power distribution ?mps? and ?the future of analog ic technology? are trademarks of monolithic power systems, inc. typical application out mp62170-1/ mp62171-1 * en is active high for mp62171-1 single-channel 1 2, 3 4 5 6, 7, 8 3.3v / 5v input to v bus usb ports flag in gnd en*
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 2 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. ordering information part number enable switch maximum continuous load current typical short- circuit current @ t a =25c package top marking free air temperature (t a ) mp62170es-1* soic8 62170es-1 mp62170ek-1 active low msop 62170ek-1 mp62171es-1 soic8 62171es-1 mp62171ek-1 active high single 1.5a 2.3a msop 62171ek-1 -20 c to +85 c * for tape & reel, add suffix ?z (e.g. mp62170es-1?z). for rohs compliant packaging, add suffix ?lf(e.g. mp62170es-1?lf?z) package reference out out out flag gnd in in en* 1 2 3 4 5 6 7 8 soic8 gnd in in en* 1 2 3 4 8 7 6 5 out out out flag top view msop8 mp62170-1 single-channel (* en is active high for mp62171-1) absolute maxi mum ratings (1) in .................................................-0.3v to +6.0v en, flag, out to gnd ..............-0.3v to +6.0v continuous power dissipation (t a = +25c) (2) soic8..................................................... 1.4w msop8...................................................... 0.8w junction temperature ...............................150c lead temperature ....................................260c storage temperature............... - 65c to +150c operating junct. temp (t j )....... -2 0c to +125c thermal resistance (3) ja jc soic8..................................... 90 ...... 42... c/w msop8?. ............................. 150 ..... 65... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) measured on jesd51-7 4-layer pcb.
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 3 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. electrical characteristics (4) v in =5v, t a =+25c, unless otherwise noted. parameter condition min typ max units in voltage range 2.7 5.5 v supply current en enabled, i out =0 90 120 a shutdown current device disable, v out =float, v in =5.5v 1 a off switch leakage device disable, v in =5.5v 1 a current limit 1.6 2.3 3 a trip current current ramp (slew rate 100a/s) on output 2.5 3.3 a under-voltage lockout rising edge 1.95 2.65 v under-voltage hysteresis 250 mv fet on resistance i out =100ma (-20c t a +85c) 75 130 m ? en input logic high voltage 2 v en input logic low voltage 0.8 v flag output logic low voltage i sink =5ma 0.4 v flag output high leakage current v in =v flag =5.5v 1 a thermal shutdown 140 c thermal shutdown hysteresis 20 c v in =5.5v, c l =1uf, r l =5.5 ? 0.9 ms v out rising time, tr (5) v in =2.7v, c l =1uf, r l =5.5 ? 1.7 ms v in =5.5v, c l =1uf, r l =5.5 ? 0.5 ms v out falling time, tf (6) v in =2.7v, c l =1uf, r l =5.5 ? 0.5 ms turn on time, ton (7) c l =100f, r l =5.5 ? 3 ms turn off time, toff (8) c l =100f, r l =5.5 ? 10 ms discharge resistance 500 ? flag deglitch time 4 8 15 ms en input leakage 1 a reverse leakage current v out =5.5v, v in =gnd 0.2 a notes: 4) production test at +25c. specificat ions over the temperature range are gu aranteed by design and characterization. 5) measured from 10% to 90% output signal. 6) measured from 90% to 10% output signal. 7) measured from 50% en signal to 90% output signal. 8) measured from 50% en signal to 10% output signal.
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 4 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. pin functions soic8 msop8 name description 1 gnd ground. 2, 3 in input voltage. accepts 2.7v to 5.5v input. 4 en ??? active high: (mp62171-1), active low: (mp62170-1). 5 flag in-to-out over-current, active -low output flag. open-drain. 6, 7, 8 out in-to-out power-distribut ion output (for all 3 output pins) typical performanc e characteristics t a = +25oc, unless otherwise noted. enx test circuit ton tr toff c l vo (outx) enx ton toff vo (outx) vo (outx) outx r l tf voltage waveforms 90% 10% 10% 10% 50% 50% 10% 90% 90% 90% 50% 50% figure 1?test circuit and voltage waveforms
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 5 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics (continued) v in = 5v, v en = 0v, v cc = 5v, c l = 2.2uf, t a = +25 c, unless otherwise noted. supply current, output enabled vs.input voltage 1 1.5 2 2.5 3 3.5 4 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn on delay (ms) 0.8 0.9 1 1.1 1.2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn off delay (ms) 0.8 1 1.2 1.4 1.6 1.8 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) rise time(ms) 45 50 55 60 65 70 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) fall time (us) 70 80 90 100 110 120 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) supply current (ua) -25 -20 -15 -10 -5 0 5 10 15 20 25 30 -30-20-10 0 10 20 30 40 50 60 70 80 90 ambient temperature ( o c) static drain-source on-state resistance varia tion (%) static drain-source on-state resistance variation vs. ambient temperature i o =0.1a 70 80 90 100 110 120 130 140 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) static drain-source on-state static drain-source on-state resistance vs. input voltage i o =1.5a 0 20 40 60 80 100 120 140 160 180 200 0 0.3 0.6 0.9 1.2 1.5 output current (a) input to output voltage (mv) input to output voltage vs. load current 1.8 1.9 2 2.1 2.2 2.3 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) current limit (a) current limit vs. input voltage
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 6 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics (continued) v in = 5v, v en = 0v, v cc = 5v, c l = 2.2uf, t a = +25 c, unless otherwise noted. v out 2v/div. en 2v/div. v out 2v/div. en 2v/div. i out 1a/div. i out 1a/div. en 2v/div. v out 2v/div. en 2v/div. v out 2v/div. v out 2v/div. en 2v/div. 1ms/div. 1ms/div. 1ms/div. 100us/div. 400us/div. 400us/div. short circuit current, device enabled into short threshold trip current with ramped load on enabled device 2.3 2.4 2.5 2.6 2.7 2.8 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) threshold trip current (a) threshold trip current vs. input voltage 4 6 8 10 12 2 4 6 8 1012 1416182022242628 peak current (a) current limit response time (us) current limit response vs. peak current
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 7 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics (continued) v in = 5v, v en = 0v, v cc = 5v, c l = 2.2uf, t a = +25 c, unless otherwise noted. i out 1a/div. flag 2v/div. i out 1a/div. flag 5v/div. i out 1a/div. en 2v/div. 2ms/div. 2ms/div. 1ms/div. 100uf 470uf 220uf v out 2v/div. en 2v/div. flag 5v/div. i out 1a/div. 2ms/div.
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 8 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. function block diagram vref deglitch logic charge pump gnd * en is active high for mp62171-1 thermal sense uvlo in en* flag out current sense amp -- -- -- -- -- -- -- -- -- -- -- -- -- + + -- -- figure 2?functional block diagram
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 9 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. detailed description over current when the load exceeds trip current (minimum threshold current triggering constant-current mode) or a short is present, mp62170- 1/mp62171-1 switches into to a constant-current mode (current limit value). mp62170-1/mp62171- 1 will be shutdown only if the over current condition stays long enough to trigger thermal protection. trigger over current protection for different overload conditions occurring in applications: 1) the output has been shorted or overloaded before the device is enabled or input applied. mp62170-1/mp62171-1 detects the short or overload and immediately switches into a constant-current mode. 2) a short or an overload occurs after the device is enabled. after the current-limit circuit has been tripped (reached the trip current threshold), the device switches into constant- current mode. however, high current may flow for a short period of time before the current-limit circuit can react. 3 output current has been gradually increased beyond the recommended operating current. the load current rises until the trip current threshold is reached or until the thermal limit of the device is exceeded. the mp62170-1/ mp62171-1 is capable of delivering current up to the trip current threshold without damaging the device. once the trip threshold has been reached, the device switches into its constant- current mode. flag response the flag pin is an open drain configuration. this fault will report a fail mode after an 8ms deglitch timeout. this is used to ensure that no false fault signals are reported. this internal deglitch circuit eliminates the need for extend components. the flag pin is not deglitched during an over temp. or voltage lockout. thermal protection the purpose of thermal protection is to prevent damage in the ic by allowing exceptive current to flow and heating the junction. the die temperature is internally monitored until the thermal limit is reached. once this temperature is reached, the switch will turn off and allow the chip to cool. the switch has a built-in hysteresis. under-voltage lockout (uvlo) this circuit is used to monitor the input voltage to ensure that the mp62170-1/mp62171-1 is operating correctly. this uvlo circuit also ensures that there is no operation until the input voltage reaches the minimum spec. enable the logic pin disables the chip to reduce the supply current. the device will operate once the enable signal reaches the appropriate level. the input is compatible with both coms and ttl. output discharge the part involves a discharge function that provides a resistive discharge path for the external output capacitor. the function will be active when the part is disabled (input voltage is under uvlo or enable is deasserted) and it will be done in a very limited time.
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 10 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. application information power-supply considerations over 10f capacitor between in and gnd is recommended. this precaution reduces power- supply transients that may cause ringing on the input and improves the immunity of the device to short-circuit transients. in order to achieve smaller output load transient, placing a high-value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy. out mp62170-1/ mp62171-1 * en is active high for mp62171-1 single-channel 1 2, 3 4 5 6, 7, 8 3.3v / 5v input to v bus usb ports flag in gnd en* figure 3?application circuit
mp62170-1/mp62171-1 ?current-limit ed power distribution switch mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 11 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. package information msop8 note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusion or gate burr. 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming) shall be 0.004" inches max. 5) pin 1 identification has half or full circle option. 6) drawing meets jedec mo-187, variation aa. 7) drawing is not to scale. seating plane 0.030(0.75) 0.037(0.95) 0.043(1.10)max 0.002(0.05) 0.006(0.15) front view bottom view pin 1 id (note 5) 0.114(2.90) 0.122(3.10) 0.187(4.75) 0.199(5.05) 1 4 5 8 0.010(0.25) 0.014(0.35) 0.0256(0.65)bsc 0.114(2.90) 0.122(3.10) top view 0.004(0.10) 0.008(0.20) side view gauge plane 0.010(0.25) 0.016(0.40) 0.026(0.65) 0 o -6 o recommended land pattern 0.016(0.40) 0.0256(0.65)bsc 0.181(4.60) 0.040(1.00)
mp62170-1/mp62171-1 ?current-limit ed power distribution switch notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. mp62170-1/mp62171-1 rev.1.0 www.monolithicpower.com 12 10/26/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. soic8 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o see detail "a" 0.0075(0.19) 0.0098(0.25) 0.150(3.80) 0.157(4.00) pin 1 id 0.050(1.27) bsc 0.013(0.33) 0.020(0.51) seating plane 0.004(0.10) 0.010(0.25) 0.189(4.80) 0.197(5.00) 0.053(1.35) 0.069(1.75) top view front view 0.228(5.80) 0.244(6.20) side view 14 85 recommended land pattern 0.213(5.40) 0.063(1.60) 0.050(1.27) 0.024(0.61) note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming) shall be 0.004" inches max. 5) drawing conforms to jedec ms-012, variation aa. 6) drawing is not to scale. 0.010(0.25) bsc gauge plane

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