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MP62260/mp62261 3.3v/5v, single-channel 2a current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 1 4/6/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. the future of analog ic technology description the MP62260/mp62261 power distribution switch features internal current limiting to prevent damage to host devices due to faulty load conditions. the MP62260/mp62261 operates from 2.7v to 5.5v nominal input voltage and includes a 45m ? power mosfet to handle up to 2a continuous load with a 3a typical current limit. the MP62260/mp62261 has built-in protection for both over current and increased thermal stress. for over-current protection (ocp), the device will limit the current by going into a constant current mode. when continuous output overload condition exceeds power dissipation of the package, the thermal protection will shut the part off. the device will recover once the device temperature reduces to approx 120 c. the MP62260/mp62261 is available in soic8 package. features ? 2a continuous current ? 3a accurate current limit ? 2.7v to 5.5v supply range ? 90 a quiescent current ? 50m ? 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 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 MP62260/ mp62261 gnd in en* out flag single-channel 3.3v / 5v input to vbus usb ports 1 2, 3 6, 7, 8 5 4 (*is active high for mp62261)
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 2 4/6/2010 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 ) MP62260ds* active low single 2a 3a soic8 tbd mp62261ds active high single 2a 3a soic8 tbd -40 c to +85 c * for tape & reel, add suffix ?z (e.g. MP62260ds?z). for rohs compliant packaging, add suffix ?lf (e.g. MP62260ds?lf) package reference 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 junction temperature ...............................150c lead temperature ....................................260c storage temperature............... - 65c to +150c operating junct. temp. (t j )..... -40 c to +125 c thermal resistance (3) ja jc soic8..................................... 90 ...... 42... 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. gnd in in en* out out out flag 1 2 3 4 8 7 6 5 top view soic8 MP62260/mp62261 single-channel (*is active high for mp62261)
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 3 4/6/2010 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 device enabled, i out =0 70 90 120 a shutdown current device disabled, v out =float, v in =5.5v 1 1.5 a off switch leakage device disabled, v in =5.5v 1 1.5 a current limit 2.2 3 3.8 a trip current current ramp (slew rate 100a/s) on output 2.3 3.3 4.3 a under-voltage lockout rising edge 1.95 2.30 2.65 v under-voltage hysteresis 250 mv fet on resistance i out =100ma and -40c t a 85c 50 75 m ? en input logic high voltage 2 v en input logic low voltage 0.8 v flag output logic low voltage i sink =5ma 0.16 0.4 v flag output high leakage current v in =v flag =5.5v 0.01 1 a thermal shutdown 140 c thermal shutdown hysteresis 20 c v in =5.5v, c l =1 f, r l =5 ? 0.4 0.9 2 ms v out rising time, tr (5) v in =2.7v, c l =1 f, r l =5 ? 0.8 1.7 3 ms v in =5.5v, c l =1 f, r l =5 ? 0.005 0.1 0.5 ms v out falling time, tf (5) v in =2.7v, c l =1 f, r l =5 ? 0.005 0.075 0.5 ms turn on time, ton (6) c l =100 f, r l =5 ? 0.8 1.6 3 ms turn off time, toff (6) c l =100 f, r l =5 ? 1 2.6 10 ms flag deglitch time 4 8 15 ms en input leakage -1 0.01 1 a reverse leakage current v out =5.5v, v in =gnd 0.2 1 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% output signal. 6) measured from (50%) en signal to (90%) output signal.
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 4 4/6/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. pin functions pin # soic8 name description 1 gnd ground. 2, 3 in input voltage. accepts 2.7v to 5.5v input. 4 en ??? * active low: (MP62260), active high: (mp62261) 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. v out t on delay t on t off t off delay v out t on delay t on t off delay t off en en v out out test circuit voltage waveforms t r t f 50% 50% 50% 50% 90% 90% 90% 90% 10% 10% 10% 10% 10% 10% 90% 90% rl cl figure 1?test circuit and voltage waveforms
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 5 4/6/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. typical performanc e characteristics v in =5v, v en =0v for MP62260, v cc =5v, c l =2.2 f, t a =25 unless otherwise noted. 1 1.5 2 2.5 3 3.5 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn on delay (ms) 0 0.2 0.4 0.6 0.8 1 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn off delay (ms) 0.8 0.9 1 1.1 1.2 1.3 1.4 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) rise time (ms) 50 70 90 110 130 150 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) supply current, output enabled vs. input voltage 60 70 80 90 100 110 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) static drain-source on-state resistance variation vs. ambient temperature i o =0.1a -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 -40 -20 0 20 40 60 80 ambient temperature ( o c) static drain-source on-state resistance vs. input voltage i o =2a 40 50 60 70 80 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) input to output voltage vs. load current 0 20 40 60 80 100 120 140 160 0 0.4 0.8 1.2 1.6 2 output current (a) output current (a) input to output voltage (mv) v in =2.7v v in =5.5v v in =3.3v v in =4v v in =5v 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 static drain-source on-state static drain-source on-state resistance vs. output current v in =5v 40 50 60 70 80 static drain-source on-state
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 6 4/6/2010 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 for MP62260, v cc =5v, c l =2.2 f, t a =25 unless otherwise noted. 3 3.2 3.4 3.6 3.8 4 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 0 5 10 15 20 25 30 35 40 45 50 55 60 468101214161820 peak current (a) current limit response time vs. peak current v out 2v/div en 2v/div v out 2v/div en 2v/div i out 1a/div en 2v/div v out 2v/div i out 2a/div v out 2v/div en 2v/div v out 2v/div en 2v/div short circuit current, device enabled into short 4ms/div threshold trip current with ramped load on enabled device current limit vs. input voltage 2.5 2.7 2.9 3.1 3.3 3.5 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) current limit (a)
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 7 4/6/2010 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 for MP62260, v cc =5v, c l =2.2 f, t a =25 unless otherwise noted. flag 5v/div i out 1a/div flag 5v/div i out 1a/div i out 1a/div en 5v/div 2ms/div ramped load on enabled device inrush current with different load capacitance i out =2a 2ms/div
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 8 4/6/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. function block diagram vref deglitch logic charge pump gnd thermal sense uvlo in en* flag out current sense amp -- -- -- -- + + -- figure2?MP62260/mp62261 functional block diagram ( *is active high for mp62261 )
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 9 4/6/2010 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, MP62260/mp62261 switches into to a constant-current mode (current limit value). MP62260/mp62261 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. MP62260/mp62261 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 MP62260/mp62261 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 MP62260/mp62261 is operating correctly. this uvlo circuit also ensures that is no operation until the input voltage reaches the minimum spec. enable the logic pin disables the switch to reduce overall supply current. once the en pin reaches en threshold, the MP62260/mp62261 is enabled.
MP62260/mp62261 ? current-limited power distribution switch MP62260/mp62261 rev. 0.9 www.monolithicpower.com 10 4/6/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 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.
MP62260/mp62261 ? current-limited 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. MP62260/mp62261 rev. 0.9 www.monolithicpower.com 11 4/6/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. package information 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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