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MP5010B 3v-18v, 1a-5a programmable-current- limit switch with over-voltage clamp MP5010B rev. 1.0 www.monolithicpower.com 1 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. the future of analog ic technology description the MP5010B is a protection device designed to protect circuitry on the output (source) from transients on the input (v cc ). it also protects the input from undesired shorts and transients coming from the source. a small capacitor on the dv/dt pin controls the slew rate that limit the inrush current at the source. for instance, a 1nf capacitor results in a source ramp-up time of 3ms. the maximum load at the source is current limited using a sense fet topology. an external resistor between the i-limit pin and the source pins controls the magnitude of the current limit. an internal charge pump drives the gate of the power device, allowing the dmos power fet to have a very low on-resistance of just 40m ? . the MP5010B also protects the source from the input being too low or too high. under-voltage lockout ensures that the input remains above the minimum operating threshold before the power device turns on. if the input rises above the high output threshold, the MP5010B limits the source voltage. features ? wide 3v-to-18v operating input range ? 5.7v output over-voltage clamp ? integrated 40m ? power fet ? enable/fault pin ? adjustable output voltage slew rate ? adjustable current limit ? thermal protection applications ? hot-swappable devices ? wireless modem data cards ? pc cards ? laptops typical application MP5010B enable/fault source source source source source vcc dv/dt gnd 5 11 6 7 8 9 10 4 3 2 1 vin vout en n/c i-limit all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under products, quality assurance page. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc.
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 2 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. ordering information part number* package top marking MP5010Bdq qfn10 (3mm3mm) afn * for tape & reel, add suffix ?z (e.g. MP5010Bdq?z). for rohs compliant packaging, add suffix ?lf (e.g. MP5010Bdq-lf-z). package reference 1 2 3 4 5 10 9 8 7 6 absolute maxi mum ratings (1) v cc , source, i-limit ..................?0.3v to 22v dv/dt, enable/fault ....................?0.3v to 6v storage temperature.............. ?65c to +155c junction temperature................................ +150c lead temperature .................................... +260c continuous power dissipation (t a =+25c) (2) ................................................................... 2.5w recommended operating conditions (3) input voltage operating range ......... 3v to 18v operating junction temp. (t j )...... -40c to +125c thermal resistance (4) ja jc qfn10 (3mmx3mm) ...............50 ...... 12 ... 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 power dissipation at any ambient temperature is calculated using: 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. reduce 0.2 watts for every 10 o c ambient temperature increasing 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7 4-layer board.
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 3 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. electrical characteristics v cc = 5v, r limit =22 ? , capacitive load= 10 f, t a =25c, unless otherwise noted. parameters symbol condition min typ max units power fet delay time dly enabling of chip to i d =40ma with a 5 ? resistive load 44 s t j =25c 40 55 on resistance r dson t j =85c (5) 52 m ? off-state output voltage v off v cc =18v, v en =0v, r l =500 ? 120 mv 0.5 in 2 pad, t a =25c 4.2 continuous current i d minimum copper, t a =80c 2.3 a thermal latch shutdown temperature (5) t sd 175 c under/over-voltage protection output clamp voltage v clamp over-voltage protection v cc =8v 5.5 5.7 5.9 v under-voltage lockout v uvlo rising edge 2.65 2.8 2.9 v under-voltage lockout (uvlo) hysteresis v hyst 0.15 v current limit (6) (for direct current-sense, refer to typical application in figure 5) hold current i lim-ss 0 ? short resistance, r lim =22 ? 2.2 2.8 3.4 a trip current i lim-ol r lim =22 ? 4.3 a current limit (6) (for kelvin sense, refer to typical application in figure 4) hold current i lim-ss 0 ? short resistance, r lim =22 ? 0.77 1.10 1.43 a trip current i lim-ol r lim =22 ? 2.18 a dv/dt circuit rise time (7) r c dv/dt =1nf 2 3 4 ms enable/fault low-level input voltage v il output disabled 0.5 v intermediate-level input voltage v i (int) thermal fault, output disabled 0.82 1.4 1.95 v high-level input voltage v ih output enabled 2.5 v high-state maximum voltage v i (max) 4.95 v pull-up current (source) i il v enable =0v 15 25 35 a maximum fanout for fault signal maximum number of chips for simultaneous shutdown 3 units maximum voltage on en (8) v max vcc v
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 4 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. electrical characteristics (continued) v cc = 5v, r limit =22 ? , capacitive load= 10 f, t a =25c, unless otherwise noted. parameters symbol condition min typ max units total device device operational 860 950 bias current i bias thermal shutdown 580 650 a minimum operating voltage for uvlo v min enable<0.5v 2.5 v notes: 5) guaranteed by design. 6) guaranteed by characterization test. 7) measured from 10% to 90%. 8) maximum input voltage on enable pin to be 6v if vcc 6v. maximum input voltage on enable pin to be vcc if vcc 6v.
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 5 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. typical performanc e characteristics v in = 5v, v en =5v, r limit =22 ? , c out =10 f, c dv/dt =1nf, t a =25c, unless otherwise noted. 550 3 3.5 4 4.5 5 5.5 300 350 400 450 500 550 600 3 3.5 4 4.5 5 5.5 30 35 45 50 55 60 3 3.5 4 4.5 5 5.5 0 20 40 60 80 100 120 140 0 0.5 1 1.5 2 2.5 40 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 20 30 40 50 60 70 80 90 100 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0102030405060708090100110 2 2.5 3 3.5 4 3 3.5 4 4.5 5 5.5 0 3 6 9 12 15 4 8 12 16 20 3 3.5 4 4.5 5 5.5 3 3.5 4 4.5 5 5.5 600 650 700 750 800 850 900 950 1000
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 6 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. typical performanc e characteristics (continued) v in = 5v, v en =5v, r limit =22 ? , c out =10 f, c dv/dt =1nf, t a =25c, unless otherwise noted. en 5v/div en 5v/div v out 2v/div v in 5v/div v in 5v/div i out 1a/div en 5v/div v out 2v/div v in 5v/div i out 1a/div en 5v/div v out 2v/div v in 5v/div i out 1a/div v out 2v/div i out 1a/div en 5v/div v in 5v/div v out 2v/div i out 1a/div en 5v/div v in 5v/div v out 2v/div i out 1a/div en 5v/div v in 5v/div v out 2v/div i out 2a/div en 5v/div v in 5v/div v out 2v/div i out 1a/div en 5v/div v in 5v/div v out 2v/div i out 2a/div
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 7 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. typical performanc e characteristics (continued) v in = 5v, v en =5v, r limit =22 ? , c out =10 f, c dv/dt =1nf, t a =25c, unless otherwise noted.
mp5010 ? programmable current 12v/5a electronic fuse MP5010B rev. 1.0 www.monolithicpower.com 8 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions pin # name description 1-5 source source. internal power fet source. ic output. 6 n/c do not connect?leave floating. 7 i-limit current limit. using a resistor between this pin and source to set the overload and short-circuit current-limit levels. 8 enable/fault enable/fault. a tri-state, bi-directional interface. leave floating to enable the output. pull to ground (using an open drain or open collector device) to disable the output. if a thermal fault occurs, this voltage enters an intermediate state to signal that the device is in thermal shutdown. 9 dv/dt slew rate. the internal dv/dt circuit cont rols the slew rate of the output voltage at turn-on. 10 gnd ground. internal ic reference. 11 exposed pad v cc input. positive input voltage.
mp5010 ? programmable current 12v/5a electronic fuse MP5010B rev. 1.0 www.monolithicpower.com 9 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. block diagram thermal shutdown latch control logic set enable/ fault 5v 25 a 28k 2.5v 2v hys reset m1 r1 d1 u1 u2 u3 vcc uvlo dv /dt control gnd dv/dt charge pump voltage clamp vcc current limit source i-limit figure 1: functional block diagram
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 10 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. operation the MP5010B limits the inrush current to the load when a circuit card connects to a live backplane power source, thereby limiting the backplane?s voltage drop and the dv/dt of the voltage to the load. it offers an integrated solution to monitor the input voltage, output voltage, output current, and die temperature, eliminating the external current-sense power resistor, power mosfet, and thermal sensor. under-voltage lockout operation if the supply (input) is below the uvlo threshold, the output is disabled, and the en/fault line is driven low. when the supply rises above the uvlo threshold, the output is enabled and the en/fault is pulled high through a 25 a current source without an external pull-up resistor. the pull-up voltage is limited to 4.95v. output over-voltage protection if the input voltage exceeds the over-voltage protection (ovp) threshold, the output is clamped at 5.7v (typ). current limiting when the chip is active, if load reaches the over- current protection (ocp) threshold (trip current) or a short is present, the part switches to constant-current mode (hold current). the chip shuts down only if the over-current condition eventually triggers thermal protection. however, when the part is powered up by v cc or en, the load current should be smaller than the hold current. otherwise, the part can?t be fully turned on. in a typical application with a current-limiting resistor of 22 ? , the trip current is 2.18a for kelvin current sensing and 4.3a for direct current sensing. if the device is in normal operation and passing 2.0a, it will only need to dissipate 160mw with the low on resistance of 40m ? . for a package dissipation of 50c/watt, the temperature rise is +8c. given a 25c ambient temperature, the typical package temperature is 33c. the MP5010B requires a heat sink during constant-current mode (such as from a short- circuit) to prevent unwanted shutdown: in constant-current mode, the chip must dissipate the power from a 5v drop. without additional heat dissipation at 50c/watt, the temperature would exceed the thermal threshold (+175c) and the MP5010B will shutdown to force the temperature to drop below a hysteresis level. without a heat sink, maintain the current below 600ma at + 25c and below 360ma at +85c to prevent thermal shutdown. thermal protection if the temperature exceeds the thermal threshold, the MP5010B disables its output and drives the enable/fault line to the middle (mid) level (read the following enable/fault pin section for more information). the thermal fault condition is latched, and the part remains off until the enable/fault line goes low. cycling the power below the uvlo threshold will also reset the fault flag. fault and enable pin the enable/fault pin is a bi-directional, three- level i/o with a weak pull-up current (25 a, typ.). the three levels are low, mid, and high. it functions to enable/disable the part and to relay fault information. enable/fault as an input: 1. low and mid disable the part. 2. low, in addition to disabling the part, clears the fault flag. 3. high enables the part (if the fault flag is clear). enable/fault as an output: 1. the pull-up current will allow a ?wired nor? pull-up to enable the part (if not overridden). 2. an under-voltage condition will cause a low on the enable/fault pin, and will clear the fault flag. 3. a thermal fault will set a mid on the enable/fault pin, and will set the fault flag
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 11 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. the enable/fault line must remain above the mid level for the output to turn on. the fault flag is an internal flip-flop that can be set or reset under the following conditions: 1. thermal shutdown: set fault flag 2. under-voltage: reset fault flag 3. low on enable/fault pin: reset fault flag 4. mid on enable/fault pin: no effect given a fault, the enable/fault pin is driven to mid. there are 4 types of faults, and each fault has a direct and indirect effect on the enable/fault pin and the internal fault flag. in a typical application there are one or more of the MP5010B chips in a system. the enable/fault lines are typically be connected together. table 1?fault function influence in application fault description internal action effect on fault pin effect on flag effect on secondary part short/over current limit current none none none under voltage output turns off internally drives enable/fault pin to logic low flag is reset disables secondary output, and resets fault flag. over voltage limit output voltage none none none thermal shutdown shutdown. the part is latched off until a uvlo or externally driven to ground. internally drives enable/fault pin to mid flag is set disables secondary part output.
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 12 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. application information current limit the current limit is a function of the external current-limit resistor. table 2 and table 3 list examples of current values as a function of the resistor value for both kelvin current sensing and direct current sensing. rise time the rise time is a function of the capacitor (c dv/dt ) on the dv/dt pin. table 4 lists typical rise times as a function of capacitance. table 2: current limit vs. current limit resistor (v cc =5v, kelvin current sensing) r limit ( ? ) 10 22 51 75 100 trip current (a) 2.31 2.18 2.05 2.00 1.99 hold current (a) 1.45 1.10 0.71 0.56 0.47 table 3: current limit vs. current limit resistor (v cc =5v, direct current sensing) r limit ( ? ) 22 51 75 100 220 trip current (a) 4.31 3.10 2.69 2.52 2.31 hold current (a) 2.79 1.29 0.91 2.43 0.40 table 4: rise time vs. c dv/dt c dv/dt 330pf 1nf 3.3nf 6.8nf rise time (typ., ms) 1.1 3 9.4 19.2 * notes: rise time = k rt *(50pf+c dv/dt ), k rt =2.8e6 the ?rise time? is measured by from 10% to 90% of output voltage. u 90% 10% rise time t input output enable figure 2?rise time
MP5010B ? 3v-16v, 3a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 13 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pcb layout pcb layout is very important to achieve stable operation. please follow these guidelines and use figure 3 as reference. ? place r limit close to the i-limit pin ? place c dv/dt close to dv/dt pin ? place the input capacitor close to the v cc pin. ? leave the n/c pin floating. ? place vias in the thermal pad and provide enough copper area near the v cc pin and source pin for thermal dissipation. source c2 en/ fault dv/dt 5 4 3 2 1 6 7 8 9 10 i_limit n/ c gnd gnd vin vout c4 c3 source source source source en/ fault vin cdv/dt r limit top layer vin bottom layer figure 3: pcb layout design example below is a direct-current-sensing design example following the application guidelines for the given specifications: table 5: design example v in 5v trip current 4.3a hold current 2.8a figure 5 shows the application schematic. the typical performance characteristics section shows the circuit waveforms. for more device applications, please refer to the related evaluation board datasheet.
MP5010B ? 3v-18v, 1a-5a programmable current limit switch MP5010B rev. 1.0 www.monolithicpower.com 14 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. typical application circuits MP5010B n/c i-limit enable/fault source source source source source vcc dv/dt gnd 5 11 6 7 8 9 10 4 3 2 1 vin vout c1 1nf r1 en figure 4: typical application schematic with kelvin current sensing MP5010B n/c i-limit enable/fault source source source source source vcc dv/dt gnd 5 11 6 7 8 9 10 4 3 2 1 vin vout c1 1nf r1 en figure 5: typical application schematic with direct current sensing
MP5010B ? 3v-18v, 1a-5a programmable current limit 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. MP5010B rev. 1.0 www.monolithicpower.com 15 4/3/2013 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information qfn10 (3mm 3mm) side view top view 1 10 6 5 bottom view 2.90 3.10 1.45 1.75 2.90 3.10 2.25 2.55 0.50 bsc 0.18 0.30 0.80 1.00 0.00 0.05 0.20 ref pin 1 id marking 1.70 0.50 0.25 recommended land pattern 2.90 note: 1) all dimensions are in millimeters. 2) exposed paddle size does not include mold flash. 3) lead coplanarity shall be 0.10 millimeter max. 4) drawing conforms to jedec mo-229, variation veed-5. 5) drawing is not to scale. pin 1 id see detail a 2.50 0.70 pin 1 id option b r0.20 typ. pin 1 id option a r0.20 typ. detail a 0.30 0.50 pin 1 id index area

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