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general description the MAX14653/m ax14654/max14655 overvoltage pro - tection devices feature a low 38m? (typ) r on internal fet and protect low-voltage systems against voltage faults up to +28v dc . an internal clamp also protects the devices from surges up to +80v. when the input voltage exceeds the overvoltage threshold, the internal fet is turned off to prevent damage to the protected down - stream components. the overvoltage protection threshold can be adjusted with optional external resistors to any voltage between 4v and 20v. with the ovlo input set below the external ovlo select voltage, the MAX14653/max14654/max14655 automatically choose the accurate internal trip thresholds. the internal overvoltage thresholds (ovlo) are preset to 15.5v typical (MAX14653), 6.8v typical (max14654), or 5.825v typical (max14655). the devices feature an open- drain acok output indicating a stable supply between minimum supply voltage and v ovlo . the MAX14653/ max14654/max14655 are also protected against over - current events by an internal thermal shutdown. the MAX14653/max14654/max14655 are offered in a small 12-bump wlp package and operate over the -40oc to +85oc extended temperature range. applications smart phones tablet pcs mobile internet devices benefts and features protect high-power portable devices ? wide operating input voltage protection from +2.5v to +28v ? integrated 38m? (typ) n-channel mosfet switch flexible overvoltage protection design ? adjustable overvoltage-protection trip level ? wide adjustable ovlo threshold range from +4v to +20v ? preset internal accurate ovlo thresholds: 15.5v 3.3% (MAX14653) 6.8v 2.9% (max14654) 5.825v 3% (max14655) additional protection features increase system reliability ? surge immunity to +80v ? soft-start to minimize in-rush current ? internal 15ms startup debounce ? thermal-shutdown protection minimize pcb area ? 12-bump wlp (1.29mm x 1.83mm) package -40oc to +85oc operating temperature range 19-6550; rev 0; 1/13 ordering informatio n / selector guide appears at end of data sheet. for related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX14653.related . typical application circuit evaluation kit available in ovlo gnd in in out out out acok r1* 0.1f 1f power adapter charger pmic apps processo r li-ion ba tter y r2* *r1 and r2 are on ly required for adjust able ovlo; otherw ise, connect ovlo to gnd. v i/ o MAX14653 max14654 max14655 MAX14653/max14654/ max14655 high-current overvoltage protector with adjustable ovlo
maxim integrated 2 electrical characteristics (v in = +2.5v to +28v, c in = 0.1f, t a = -40oc to +85oc, unless otherwise noted. typical values are at v in = +5.0v, i in 3a, and t a = +25oc.) (note 3) note 1: survives burst pulse up to 80v with 2? series resistance. note 2: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . (all voltages referenced to gnd.) in (note 1) ............................................................. -0.3v to +29v out .............................................................. -0.3v to v in + 0.3v ovlo ..................................................................... -0.3v to +24v acok ...................................................................... -0.3v to +6v continuous in, out current ................................................ 4.5a ( note: continuous current limited by thermal design) peak in, out current (10ms) ................................................. 8a continuous power dissipation (t a = +70oc) wlp (derate 13.7mw/oc above +70oc) .................... 1096mw operating temperature range ............................ -40oc to +85oc junction temperature ...................................................... +150oc storage temperature range ............................. -65oc to +150oc soldering temperature (reflow) ....................................... +260oc stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to ab solute maximum rating conditions for extended periods may affect device reliability. package thermal characteristics (note 2) wlp junction-to-ambient thermal resistance ( ja ) .......... 73c/w absolute maximum ratings parameter symbol conditions min typ max units input voltage range v in 2.5 28 v input clamp voltage v in_clamp i in = 10ma, t a = +25oc 33 v input supply current i in v in = 5v 70 120 a ovlo supply current i in_q v ovlo = 3v, v in = 5v, v out = 0v 63 120 a internal overvoltage trip level v in_ovlo (v in rising) MAX14653 15 15.5 16 v max14654 6.6 6.8 7.0 max14655 5.65 5.825 6.00 (v in falling) MAX14653 14.5 max14654 6.5 max14655 5.55 ovlo set threshold v ovlo_th MAX14653 1.22 1.26 1.30 v max14654 and max14655 1.18 1.22 1.26 adjustable ovlo threshold range 4 20 v external ovlo select threshold v ovlo_select 0.2 0.3 v switch on-resistance r on v in = 5v, i out = 1a, t a = +25oc 38 53 m? out load capacitance c out v in = 5v 1000 f ovlo input leakage current i ovlo v ovlo = v ovlo_th -100 100 na high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 3 electrical characteristics (continued) (v in = +2.5v to +28v, c in = 0.1f, t a = -40oc to +85oc, unless otherwise noted. typical values are at v in = +5.0v, i in 3a, and t a = +25oc.) (note 3) note 3: all specifications are 100% production tested at t a = +25oc, unless otherwise noted. specifications are over -40oc to +85oc and are guaranteed by design. parameter symbol conditions min typ max units in leakage voltage by ovlo v in_leak v ovlo = 20v, v in = unconnected, r ovlo = 1m? 0.5 v thermal shutdown 130 oc thermal-shutdown hysteresis 20 oc digital signals ( acok ) acok output low voltage v ol v i/o = 3.3v, i sink = 1ma (see typical application circuit ) 0.4 v acok leakage current v acok_leak v i/o = 3.3v, acok deasserted (see typical application circuit ) -1 1 a timing characteristics (figure 1) debounce time t deb time from 2.5v < v in < v in_ovlo to v out = 10% of v in 15 ms soft-start time t ss v out = 10% of v in to soft-start off 30 ms switch turn-on time t on v in = 5v, r l = 100?, c load = 100f; v out from 10%; v in to 90% v in 2 ms switch turn-off time t off v in > v ovlo to v out = 80% of v in ; r l = 100?, v in rising at 2v/s 2 s esd protection human body model all pins 2 kv iec 61000-4-2 contact discharge in pin 8 kv iec 61000-4-2 air gap discharge in pin 15 kv high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 4 figure 1. timing diagram t on t off t off t on t deb t deb t deb t deb t ss 90% 10% ovlo 2.5v in out note: wa veforms are no t to scale ovlo v ovlo_th 90% thermal shutdown 10% acok high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 5 typical operating characteristics (v in = +5.0v, c in = 0.1f, c out = 1f, t a = +25oc, unless otherwise noted.) normalized r on vs. temperatur e MAX14653 toc03 temperature (c) normalized on-resistance 60 35 10 -15 0.5 1.0 1.5 2.0 0 -40 85 i out = 1a normalized to t a = +25c ovlo leakage current vs. v ovlo MAX14653 toc02 v ovlo (v) ovlo leakage current (a) 6 5 4 3 2 1 0.02 0.04 0.06 0.08 0.10 0 07 normalized external ovlo selec t threshold vs. temperature MAX14653 toc07 temperature (c ) normalized threshol d 60 35 10 -15 0.94 0.98 1.02 1.06 1.10 0.90 -40 85 normalized to t a = +25c v in = +16v , MAX14653 normalized ovlo threshol d vs. temperature MAX14653 toc05 temperature (c ) normalized threshol d 60 35 10 -15 0.94 0.98 1.02 1.06 1.10 0.90 -40 85 normalized to t a = +25c in supply curren t vs. supply voltage MAX14653 toc01 in voltage (v) in supply current (a) 24 20 16 12 8 4 50 100 150 200 250 300 0 02 8 MAX14653 t a = +85c t a = -40c t a = +25c normalized external ovlo set threshold vs. temperature MAX14653 toc06 temperature (c ) normalized threshol d 60 35 10 -15 0.94 0.98 1.02 1.06 1.10 0.90 -40 85 normalized to t a = +25c normalized r on vs. output current MAX14653 toc04 output current (a) normalized on-resistance 3.4 2.3 1.2 0.5 1.0 1.5 2.0 2.5 3.0 0 0.1 4.5 normalized to 0.1a high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 6 normalized debounce tim e vs. temperature MAX14653 toc08 temperature (c ) normalized debounce tim e 60 35 10 -15 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 -40 85 normalized to t a = +25c power-up response (c l = 1000f) MAX14653 toc10 4ms /div v in 5v/div v out 5v/div i out 100ma/div 80v surge test waveform (without MAX14653) MAX14653 toc12 10s /div 20v/div power-up response (c l = 100f) MAX14653 toc09 v in 5v/div v out 5v/div i out 100ma/div 4ms /div overvoltage fault response MAX14653 toc11 40ms/div v in 10v/div v out 10v/div i out 500ma/div 80v surge test waveform (with MAX14653) MAX14653 toc13 10s/div v in 20v/div typical operating characteristics (continued) (v in = +5.0v, c in = 0.1f, c out = 1f, t a = +25oc, unless otherwise noted.) high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 7 pin description pin confguration pin name function a1, a4, b4, c4 gnd ground. connect gnd pins together for proper operation. a2, a3, b2, out output voltage. output of internal switch. connect out pins together for proper operation. b1 acok open-drain flag output. acok is driven low after input voltage is stable between minimum v in and v ovlo after debounce. connect a pullup resistor from acok to the logic i/o voltage of the host system. acok is high impedance after thermal shutdown. b3, c2, c3 in voltage input. bypass in with a 0.1f ceramic capacitor as close as possible to the device. connect in pins together for proper operation. c1 ovlo external ovlo adjustment. connect ovlo to gnd when using the internal threshold. connect a resistor-divider to ovlo to set a different ovlo threshold; this external resistor-divider is completely independent of the internal threshold. wlp (1.3mm x 1.86mm) top view (bumps on bottom) gnd ovlo gnd acok gnd gnd max1465 3 max1465 4 max1465 5 + 1 2 34 a in in outi n out out b c high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 8 functional diagram detailed description the MAX14653/max14654/max14655 overvoltage pro - tection devices feature a low on-resistance (r on ) internal fet and protect low-voltage systems against voltage faults up to +28v dc . an internal clamp also protects the devices from surges up to +80v. if the input voltage exceeds the overvoltage threshold, the internal fet is turned off to prevent damage to the protected compo - nents. the 15ms debounce time built into the device prevents false turn on of the internal fet during startup. device operation the devices contain timing logic that controls the turn-on of the internal fet. the internal charge pump is enabled when v in < v in_ovlo if internal trip thresholds are used or when v in < v ovlo_th if external trip thresholds are used. the charge-pump startup, which occurs after a 15ms debounce delay, turns the internal fet on (see the functional diagram ). after the debounce time, soft-start limits the fet inrush current for 30ms (typ). at any time, if v in rises above v ovlo_thresh , out is disconnected from in. internal switch the MAX14653/max14654/max14655 incorporate an internal fet with a 38m? (typ) r on . the fet is internally driven by a charge pump that generates a necessary gate voltage above in. overvoltage lockout (ovlo) the MAX14653 has a 15.5v (typ) overvoltage threshold (ovlo). the max14654 and max14655 have 6.8v and 5.825v (typ) ovlo thresholds, respectively. thermal-shutdown protection the MAX14653/max14654/max14655 feature thermal shutdown circuitry. the internal fet turns off when the junction temperature exceeds +130oc (typ). the device exits thermal shutdown after the junction temperature cools by 20oc (typ). acok output an open-drain acok output gives the MAX14653/ max14654 /max14655 the ability to communicate a sta - ble power source to the host system. acok is driven low after input voltage is stable between minimum v in and v ovlo after debounce. connect a pullup resistor from acok to the logic i/o voltage of the host system. acok is high impedance after thermal shutdown. MAX14653 max14654 max14655 v bg reference charg e pump logic control sel tempera ture fa ul ts in in ovlo gnd out out in out acok high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 9 applications information in bypass capacitor for most applications, bypass in to gnd with a 0.1f ceramic capacitor as close as possible to the device. if the power source has significant inductance due to long lead length, the device clamps the overshoot due to lc tank circuit. out output capacitor the slow turn-on time provides a soft-start function that allows the MAX14653/max14654/max14655 to charge an output capacitor up to 1000f without turning off due to an overcurrent condition. external ovlo adjustment functionality if ovlo is connected to ground, the internal ovlo com - parator uses the internally set ovlo value. if an external resistor-divider is connected to ovlo and v ovlo exceeds the ovlo select voltage, v ovlo_ select , the internal ovlo comparator reads the in fraction fixed by the external resistor divider. r 1 = 1m? is a good starting value for minimum current consumption. since v in_ovlo , v ovlo_thresh , and r 1 are known, r 2 can be calculated from the following formula: 1 in_ovlo ovlo_th 2 r vv 1 r ?? = + ?? ?? this external resistor-divider is completely independent from the internal resistor-divider. esd test conditions esd performance depends on a number of conditions. the MAX14653Cmax14655 are specified for 2kv hbm typical esd on all pins, contact and air-gap discharge on pin in. contact maxim for a reliability report that docu - ments test setup, test methodology, and test results. hbm esd protection figure 2a shows the human body model, and figure 2b shows the current waveform it generates when discharged into low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest, which is then discharged into the device through a 1.5k? resistor. figure 2a. human body esd test model figure 2b. human body current waveform charge-current - limit resistor discharge resistance storage capacito r c s 100pf r c 1m r d 1.5k high- voltage dc source device unde r test i p 100% 90% 36.8% t rl time t dl current wavefor m peak-to-peak ringin g (not drawn to scale) i r 10% 0 0 amperes high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
maxim integrated 10 ordering information/selector guide chip information process: bicmos note: all devices are specified over the -40oc to +85oc temperature range. +denotes lead(pb)-free/rohs-compliant package. t = tape and reel. * future productcontact factory for availability. package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. part pin- package top mark ovlo (v) MAX14653 ewc+t* 12 wlp acs 15.5 max14654 ewc+t 12 wlp act 6.8 max14655 ewc+t* 12 wlp acu 5.825 package type package code outline no. land pattern no. 12 wlp w121g1+1 21-0542 refer to application note 1891 high-current overvoltage protector with adjustable ovlo www.maximintegrated.com MAX14653/max14654/ max14655
? 2013 maxim integrated products, inc. 11 revision history revision number revision date description pages changed 0 1/13 initial release maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. MAX14653/max14654/ max14655 high-current overvoltage protector with adjustable ovlo for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.

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