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mp62350/mp62351 3.3v/5v, dual-channel, 500ma current-limited power distribution switches with output discharge mp62350/mp62351 rev. 0.91 www.monolithicpower.com 1 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. the future of analog ic technology description the mp62350/mp62351 power distribution switch features internal current limiting to prevent damage to host devices due to faulty load conditions. the mp62350/mp62351 analog switch has 85m ? 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 mp62350/mp62351 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. the mp62350/mp62351 included a discharge function that provides a resistive discharge path for the external output capacitor when the part is disabled. the mp62350/mp62351 is available in 8-pin msop and soic packages. features ? 500ma continuous current ? accurate current limit ? output discharge function ? 2.7v to 5.5v supply range ? 140ua quiescent current ? 85m ? 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 ? ul recognized: pending 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 registered trademarks of monolithic power systems, inc. typical application out2 mp62350 dual-channel out1 6 7 1 4 3 5 8 2 +5v to usb controller output 1 output 2 flag1 flag2 en1 in gnd en2
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 2 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. ordering information part number enable switch maximum continuous load current typical short- circuit current @ t a =25c package temperature mp62351es active high dual 0.5a 750ma soic8 mp62351ek active high dual 0.5a 750ma msop8 MP62350ES active low dual 0.5a 750ma soic8 mp62350ek active low dual 0.5a 750ma msop8 ?20 c to +85 c * for tape & reel, add suffix ?z (eg. mp62350/mp62351es?z). for rohs compliant packaging, add suffix ?lf (eg. mp62350/mp62351es?lf?z) package reference 1 2 3 4 8 7 6 5 top view en1* flag1 flag2 en2* out1 in gnd out2 msop8 en1* flag1 flag2 en2* out1 in gnd out2 1 2 3 4 8 7 6 5 top view soic8 *: en is active high for mp62351 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 temperature.............. ? 20c to +85c 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 power 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.
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 3 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 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 one channel enabled, i out =0, one switch on 90 120 a supply current both channels enabled, i out =0, both switches on 140 160 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 550 1100 ma trip current current ramp (slew rate 100a/s) on output 1 1.4 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) 85 130 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, cl=1uf, rl=11 ? 0.9 ms v out rising time, tr (5) v in =2.7v, cl=1uf, rl=11 ? 1.7 ms v in =5.5v, cl=1uf, rl=11 ? 0.5 ms v out falling time, tf (6) v in =2.7v, cl=1uf, rl=11 ? 0.5 ms turn on time, ton (7) c l =100 f, rl=11 ? 3 ms turn off time, toff (8) c l =100 f, rl=11 ? 10 ms discharge resistance 100 ? flag deglitch time 4 8 15 ms enx input leakage 1 a reverse leakage current outx=5.5v, in=gnd 0.2 a notes: 4) production test at +25c. specificat ions over the temperature range are guaranteed by design and characterization. 5) measured from 10% to 90%. 6) measured from 90% to 10%. 7) measured from (50%) en signal to (90%) output signal. 8) measured from (50%) en signal to (10%) output signal.
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 4 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. pin functions mp62350/mp62351 pin# name description 1 en1 active low: (mp62350), active high: (mp62351) 2 flag1 in-to-out1 over-current, active -low output flag. open-drain. 3 flag2 in-to-out2 over-current, active -low output flag. open-drain. 4 en2 active low: (mp62350), active high: (mp62351) 5 out2 in-to-out2 power-di stribution switch output. 6 gnd ground. 7 in input voltage. accepts 2.7v to 5.5v input. 8 out1 in-to-out1 power-distribution switch output typical performanc e characteristics t a = +25oc, unless otherwise noted. v i (en x ) vi(enx) v o (out x ) out x rl cl v o (out x ) vo(outx) 50% 50% 50% 50% 90% 90% 90% 90% 10% 10% 10% 10% t on t r t f ton t off toff voltage waveforms test circuit figure 1?test circuit and voltage waveforms
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 5 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. typical performanc e characteristics v in =5v, v en =0v, c l =1uf, t a = +25oc, unless otherwise noted. input votage (v) input votage (v) turn on delay (ms) turn off delay (ms) input voltage (v) input voltage (v) input voltage (v) input votage (v) 1 1.5 2 2.5 3 3.5 2.5 3 3.5 4 4.5 5 5.5 6 2.2 2.3 2.4 2.5 2.6 2.7 2.5 3 3.5 4 4.5 5 5.5 6 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 2.5 3 3.5 4 4.5 5 5.5 6 rise time(ms) 30 35 40 45 50 55 2.5 3 3.5 4 4.5 5 5.5 6 fall time (us) 60 70 80 90 100 110 2.5 3 3.5 4 4.5 5 5.5 6 supply current (ua) supply current, output enabled vs. input voltage -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 -30 -15 0 15 30 45 60 75 90 static drain-source on-state resistance varia tion (%) static drain-source on-state resistance variation vs. ambient temperature i out =0.1a 70 80 90 100 110 120 130 140 2.5 3 3.5 4 4.5 5 5.5 6 static drain-source on-state resistance vs. input voltage i out =0.5a 0 10 20 30 40 50 60 70 80 90 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 output current (a) input to output voltage (mv) input to output voltage vs. load current current limit vs. input voltage 0.65 0.7 0.75 0.8 0.85 0.9 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) current limit (a) vin=5.5v vin=4v vin=5v vin=3.3v vin=2.7v
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 6 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. typical performanc e characteristics (continued) v in =5v, v en =0v, c l =1uf, t a = +25oc, unless otherwise noted. threshold trip current vs. input voltage current limit response vs. peak current 0.7 0.8 0.9 1 1.1 1.2 2.5 3 3.5 4 4.5 5 5.5 6 input volt age (v) threshold trip current (a) 0 4 8 12 16 20 24 28 02468101214 peak current (a) current limit response time (us) en 5v/div flag 5v/div i out 500mv/div v out 2v/div turn off delay and fall time with output discharge i out =0a en 5v/div flag 5v/div i out 500mv/div v out 2v/div en 5v/div flag 5v/div i out 500mv/div v out 2v/div en 5v/div flag 5v/div i out 500mv/div v out 2v/div en 5v/div flag 5v/div i out 500mv/div v out 2v/div en 5v/div i out 200ma/div i out 500ma/div v out 2v/div 4ms/div turn off delay and fall time with 1uf load i out =0.5a turn off delay and fall time with 100uf load i out =0.5a threashold trip current with ramped load on enabled device turn on delay and rise time with 1uf load i out =0.5a turn on delay and rise time with 100uf load i out =0.5a
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 7 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. typical performanc e characteristics (continued) v in =5v, v en =0v, c l =1uf, t a = +25oc, unless otherwise noted. en 5v/div i out 200ma/div i out 500ma/div flag 5v/div i out 1a/div flag 5v/div 1ms/div 2ms/div 2ms/div inrush current with different load capacitance i out =0.5a ramped load on enabled device
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 8 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. function block diagram thermal sense deglitch flag2 logic thermal sense charge pump en1 in en2 charge pump uvlo deglitch current sense current sense logic gnd amp -- + amp -- + flag1 vref + - out1 out2 en en figure 2?functional block diagram
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 9 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 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, mp62350/mp62351 switches into to a constant-current mode (current limit value). mp62350/mp62351 will be shutdown only if the overcurrent condition stays long enough to trigger thermal protection. trigger overcurrent protection for different overload conditions occurring in applications: 1) the output has been shorted or overloaded before the device is enabled or input applied. mp62350/mp62351 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 mp62350/mp62351 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 a 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 mp62350/mp62351 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.
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 10 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. application information power-supply considerations over 10 f 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 ripple, placing a high-value electrolytic capacitor on the output pin(s) is recommended when the load is heavy. out2 mp62350 dual-channel out1 6 7 1 4 3 5 8 2 +5v to usb controller output 1 output 2 flag1 flag2 en1 in gnd en2 figure 3?application circuit
mp62350/mp62351 ?current-limited power distribution switches mp62350/mp62351 rev. 0.91 www.monolithicpower.com 11 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 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)
mp62350/mp62351 ?current-limited power distribution switches 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. mp62350/mp62351 rev. 0.91 www.monolithicpower.com 12 9/18/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 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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