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general description the max14670Cmax14673 provide protection to valu - able consumer circuits against positive voltage faults up to +28v dc . an internal clamp also protects the devices from surges up to +80v. the device is able to disconnect the system from its output terminal when wrong input conditions are detected. the max14670Cmax14673 overvoltage protection devic - es feature low 65m (typ), wlp package on-resistance (r on ) internal fets, effectively minimizing the voltage drop across the device. when the input voltage exceeds the overvoltage threshold, the internal fet is turned off to prevent damage to the protected components. the overvoltage protection threshold can be adjusted with optional external resistors to any voltage between 5v and 22v. the devices automatically choose the accu - rate internal trip thresholds when the overvoltage lockout input (ovlo) is set lower than the external ovlo select voltage. the internal ovlo are preset to typical 6.8v (max14670), 15.5v (max14671), 5.825v (MAX14672), or 22v (max14673). the max14670Cmax14673 feature reverse bias blocking capability. unlike other overvoltage protectors, when the max14670Cmax14673 are disabled, the voltage applied to out does not feed back into in. these devices also feature an otg enable pin that allows out voltage to supply in. the max14670Cmax14673 also have thermal shutdown protection against over load conditions. the max14670Cmax14673 are specified over the extend - ed -40c to +85c temperature range. the max14670/ max14671 are available in a 15-bump wlp package and the MAX14672/max14673 are available in a 10-pin tdfn package. benefts and features protect high-power portable devices ? wide operating input voltage protection from +3v to +28v ? +80v surge capability ? 4.5a continuous current capability (wlp package) ? integrated 65m (typ) n-channel mosfet switch (wlp package) flexible overvoltage protection design ? wide +5v to +22vadjustable ovlo threshold range ? acok and acok indicate input is in range ? otg enable allows out to supply in ? preset accurate internal ovlo thresholds: 6.8v 3% (max14670) 15.5v 3% (max14671) 5.825v 3% (MAX14672) 22v 3% (max14673) additional protection features increase system reliability ? out-in reverse bias blocking capability ? soft-start to minimize inrush current ? internal 15ms startup debounce ? thermal shutdown protection space saving ? 15-bump, 1.6mm x 2.1mm, wlp package ? 10-pin, 3mm x 3mm, tdfn package applications tablets smart phones e-readers pc notebooks charging usb hosts ordering information/selector guide and typical operating circuit appear at end of data sheet. for related parts and recommended products to use with this part, refer to www.maximintegrated.com/max14670.related . 19-6727; rev 0; 6/13 evaluation kit available max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo
maxim integrated 2 electrical characteristics (v in = +3v to +28v, v out = +3v to +24v, t a = -40c to +85c, unless otherwise noted. typical values are at v in = +5v, t a = +25c.) (note 4) note 3: 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 +26v in - out ................................................................. -26v to +29v otg_en, acok, acok ......................................... -0.3v to +6v ovlo ..................................................................... -0.3v to +26v continuous current into in, out wlp (note 2) .................................................................. 4.5a tdfn .............................................................................. 3.2a continuous power dissipation (t a = +70c) wlp (derate 16.4mw/c above +70c) .................... 1312mw tdfn (derate 24.4mw/c above +70c) .................. 1951mw operating temperature range ........................... -40c to +85c storage temperature range ............................ -65c to +150c soldering temperature (reflow) ....................................... +260c 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 3) wlp junction-to-ambient thermal resistance ( ja ) .......... 52c/w tdfn junction-to-ambient thermal resistance ( ja ) .......... 41c/w junction-to-case thermal resistance ( jc ) ................. 9c/w absolute maximum ratings note 1: survives burst pulses up to 80v with 2 series resistance and hot plug events. above the input clamp voltage, the in must be a surge in nature with a limited energy. note 2: limited by the pcb thermal design. absolute maximum ratings parameter symbol conditions min typ max units input startup voltage v inbt 2.17 3 v input sustaining voltage v inbu i out = 0a 1.5 2.3 v input clamp voltage v in_clamp i in = 10ma, t a = +25c 33.7 v input supply current i in v ovlo = 0v, v in = 5v, acok is unconnected, i out = 0ma 100 190 a output startup voltage v outbt 2.15 3 v output sustaining voltage v outbu i in = 0a 1.5 2.3 v output supply current i out v ovlo = 0v, v out = 5v, i in = 0ma, v otg_en = 1.8v 83 170 a output shutdown current v ovlo = 3v, v out = 5v, v in = 0v, v otg_en = 0v 6 12 a in leakage voltage v out = 21v, in unconnected, v otg_en = 0v 0.001 0.1 v in discharge current v in = v out = 5v, in discharge current after an otg_en transition from high to low 100 150 ma max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 3 electrical characteristics (continued) (v in = +3v to +28v, v out = +3v to +24v, t a = -40c to +85c, unless otherwise noted. typical values are at v in = +5v, t a = +25c.) (note 4) parameter symbol conditions min typ max units ovp (in to out) on-resistance (in to out) r on v in = 5v, i out = 100ma wlp, t a = +25c 65 87 m tdfn, t a = +25c 85 110 internal overvoltage trip level v in_ovlo max14670 v in rising 6.6 6.8 7.0 v v in falling 6.5 max14671 v in rising 15.0 15.5 16.0 v in falling 14.5 MAX14672 v in rising 5.65 5.825 6.0 v in falling 5.55 ovlo set threshold v ovlo_th 1.18 1.221 1.26 v adjustable ovlo threshold range v ovlo_ext 5 22 v external ovlo select threshold v ovlo_sel 0.2 0.25 0.3 v digital signals (acok, acok , otg_en) acok output high voltage v acok i source 100a, v in > 3v 1.6 1.8 2.0 v acok leakage current pull down to ground, v out = 5v, otg_en = high, acok deasserted 1 a acok output low voltage v ol v io = 3.3v, i sink = 1ma 0.4 v acok leakage current v io = 3.3v, deasserted 1 a otg_en input logic high v ih 1.6 v otg_en input logic low v il 0.4 v otg_en input leakage current i in 0v v in v il and v ih v in v cc , v cc = 5.5v -1 +1 a timing characteristics (figure 1) in debounce time t deb v in = 5v to charge pump on (v out = 10% of v in ), r load = 100, c load = 10f 20 ms in/out soft-start time t ss v in = 5v to v out = 90% of v in , r load = 100, c load = 10f 25 ms in ovp turn-on time during soft-start t on v in = 5v, r load = 100, c load = 10f, v out = 20% of v in to 80% of v in 1.5 ms in ovp turn-off response time t off from v in > v ovlo to v out = 80% of v in , r load = 100 1 s otg turn-on time t otg_on time from otg_en high to v in = 80% of v out , v out = 5v, c in = 10f 1.4 ms in-discharge pulse duration v in = v out = 5v, current pulse duration after an otg_en transition from high to low 1.1 ms max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 4 note 4: all devices are 100% production tested at t a = +25c. limits over the operating temperature range are guaranteed by design and not production tested. electrical characteristics (continued) (v in = +3v to +28v, v out = +3v to +24v, t a = -40c to +85c, unless otherwise noted. typical values are at v in = +5v, t a = +25c.) (note 4) figure 1. timing diagram parameter symbol conditions min typ max units thermal protection thermal shutdown t shdn 150 c thermal hysteresis t hyst 20 c esd protection human body model in pin 15 kv iec 61000-4-2 contact discharge in pin 8 kv iec 61000-4-2 air-gap discharge in pin 8 kv out ovlo acok in ovlo 2.2v v ovlo _th thermal shutdown acok otg_en t off t deb t deb t deb t ss t on t on t off t deb t otg_on deassert acok, acok good signal v acok max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 5 typical operating characteristics (v in = +5v, ovlo = gnd, c in = 0.1f, c out = 1f, t a = +25c, unless otherwise noted.) in supply current vs. in voltage max14670 toc01 in voltage (v) in supply current (a) 20 10 50 100 150 200 250 300 350 400 0 0 30 max14670 t a = +85oc t a = +25oc t a = -40oc ovlo leakage current vs. ovlo voltage max14670 toc02 v ovlo (v) ovlo leakage current (na) 6 4 2 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0 -1.0 0 8 v in = 0v normalized on-resistance vs. temperature max14670 toc03 temperature (oc) normalized r on 60 35 -15 10 0.7 0.8 0.9 1.0 1.2 1.1 1.3 1.4 0.6 -40 85 v in = +5v i out = 1a normalized to +25oc v in = +3.6v normalized on-resistance vs. output current max14670 toc04 output current (a) normalized r on 4 3 2 1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 0 5 normalized to 0.1a load current output voltage (v) output supply current (a) 20 15 10 5 50 100 150 200 250 300 0 0 25 output supply current vs. output voltage max14670 toc05 t a = +25oc t a = +85oc t a = -40oc otg_en = high out-in leakage current vs. out voltage max14670 toc06 out voltage (v) out-in leakage current (a) 4 2 1 2 3 4 5 6 7 8 9 10 0 0 6 v in = 0v normalized internal ovlo threshold vs. temperature max14670 toc07 temperature (oc) normalized internal ovlo threshold 60 35 10 -15 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 0.95 -40 85 normalized to +25oc max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 6 typical operating characteristicsc (continued) (v in = +5v, ovlo = gnd, c in = 0.1f, c out = 1f, t a = +25c, unless otherwise noted.) normalized debounce time vs. temperature max14670 toc10 temperature (oc) normalized debounce time 60 35 -15 10 0.85 0.90 0.95 1.00 1.10 1.05 1.15 1.20 0.80 -40 85 r l = 100, c l = 10f normalized to +25oc power-up response, c out = 100f max14670 toc11 v out 5v/div v acok 2v/div v in 5v/div 10ms /div i out = 500ma c out = 100f power-up response, c out = 1000f max14670 toc12 v out 5v/div v acok 2v/div v in 5v/div 10ms /div i out = 500ma c out = 1000f normalized external ovlo select threshold vs. temperature max14670 toc09 temperature (oc) normalized external ovlo select threshold 60 35 10 -15 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 0.95 -40 85 normalized to +25oc normalized external ovlo set threshold vs. temperature max14670 toc08 temperature (oc) normalized external ovlo set threshold 60 35 10 -15 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 0.95 -40 85 v in = +6v normalized to +25oc max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 7 typical operating characteristicsc (continued) (v in = +5v, ovlo = gnd, c in = 0.1f, c out = 1f, t a = +25c, unless otherwise noted.) otg_en enable max14670 toc13 v in 5v/div v out 5v/div v otg_en 5v/div 2ms /div v out = 5v v ovlo = 0v c in = 10f i in = 250ma 0v overvoltage fault response max14670 toc15 v out 5v/div v acok 2v/div v in 5v/div 10ms /div i out = 500ma 0v otg_en disable max14670 toc14 v in 5v/div v out 5v/div v otg_en 5v/div 2ms /div v out = 5v v ovlo = 0v c in = 10f i in = 250ma 0v 80v surge test waveform max14670 toc16 v in 20v/div 10s /div without max14670 80v surge test waveform max14670 toc17 v in 20v/div v out 20v/div 10s /div with max14670 max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 8 pin confgurations pin descriptions bump pin name function max14670/ max14671 MAX14672/ max14673 a1 C b1 1, 2 out overvoltage protection output. bypass out with a 1f ceramic capacitor. externally connect all out together. a5 4 otg_en enable input for otg supply operation b2, c1 C c4 8-10 in overvoltage protection input. if desired, bypass in with a 0.1f ceramic capacitor as close to the device as possible. externally connect all in together . b3 6 acok 1.8v logic output. acok is driven high after input voltage is stable between minimum v in and v ovlo when otg_en = 0. connect a pulldown resistor from acok to ground. b4 3 ovlo overvoltage lockout input. connect ovlo to gnd to use internal ovlo threshold. connect ovlo to a resistor-divider for a different voltage threshold. b5 5 acok open-drain flag output. is driven low after input voltage is stable between minimum v in and v ovlo when otg_en = 0. connect a pullup resistor from to the logic i/o voltage of the host system. c5 7 gnd ground ep exposed pad (tdfn only) connect ep to ground. b a c out out out out otg_en out in acok ovlo in in in in gnd acok 1 2 3 4 5 max1 4 6 7 0 max1 4 6 7 1 + top view (bumps on bottom) 1 3 4 10 8 7 in in gnd MAX14672 max14673 2 9 in 5 + 6 acok out ovlo otg_ en out acok ep tdfn-ep *connect ep to gnd wlp max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 9 functional diagram comp sel bg ok 1.8v ldo an al o g / d i g i t al c o n t r o l t i mi n g an d c o n t r o l l o g i c o u t c h ar g e pu mp an d g at e d r i ver q2 v cc1_int v cc1_int v bg i n c h ar g e pu mp an d g at e d r i ver in otg logic level shifter max14670 max14673 enb clamp o tg_e n o vlo in out acok acok tvs clamp current shot q1 max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 10 detailed description the max14670Cmax14673 overvoltage protection (ovp) devices feature low on-resistance (r on ) internal fets (q1+q2) 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 output is disconnected from the input to prevent damage to the protected components. the 15ms debounce time prevents false turn-on of the internal fets during startup. soft-start to minimize inrush current, the devices feature a soft-start capability to slowly turn on q1 and q2. soft-start begins when acok /acok is asserted and ends after 15ms (typ). overvoltage lockout (ovlo) connect ovlo to ground to use the internal ovlo comparator with the internally set ovlo value. when in goes above the overvoltage lockout threshold (v in_ovlo ), out is disconnected from in and acok / acok is deasserted. when in drops below v in_ovlo , the debounce time starts counting. after the debounce time, out follows in again and acok /acok is asserted. external ovlo adjustment functionality when an external resistor-divider is connected to ovlo and v ovlo exceeds the ovlo select voltage (v ovlo_sel ), the internal ovlo comparator reads in by the external resistor-divider. r1 = 1m is a good starting value for minimum current consumption. since v in_ovlo , v ovlo_th , and r1 are known, r2 can be calculated from the following formula: this external resistor-divider is completely independent from the internal resistor-divider. reverse bias blocking the ics feature reverse bias blocking. when in voltage is below input startup voltage and otg_en is low, the switch between in and out is open and the two back- to-back diodes of the two series switches block reverse bias. therefore, when the voltage is applied at the output, current does not travel back to the input. when ovlo is high, the parts block against reverse bias as well. otg enable the devices feature reverse turn-on capability. otg_en can be used to turn on the switch for out to feed back to in when the voltage applied at out is above the mini - mum startup voltage. when otg_en is high, acok and acok are deasserted. during the otg operation, if in goes above ovlo, the ovp switch turns off. it is recom - mended that the power is supplied to out prior to otg operation and also the power is removed from out prior to disable otg operation. thermal shutdown protection the devices feature thermal shutdown protection to pro - tect the devices from overheating. the internal fets turn off when the junction temperature exceeds +150c (typ), and the device returns to normal operation after the tem - perature drops by approximately 20c (typ). applications information in bypass capacitor if desired, bypass in to gnd with a 0.1f ceramic capaci - tor as close to the device as possible. if the power source has significant inductance due to long lead length, the device prevents overshoots due to the lc tank circuit and provides protection by clamping the overshooting. output capacitor the slow turn-on time provides a soft-start function that allows the devices to charge an output capacitor up to 1000f without turning off due to an overcurrent condi - tion. bypass out to gnd with a minimum of 1 f ceramic capacitor. extended esd protection esd protection structures are incorporated on all pins to protect against electrostatic discharges up to 2kv (human body model) encountered during handling and assembly. in is further protected against esd up to 15kv (hbm), 15kv (air-gap discharge method described in iec 61000-4-2) and 8kv (contact discharge method described in iec 61000-4-2) without damage. the esd structures withstand high esd both in normal operation and when the device is powered down. after an esd event, the max14670Cmax14673 continue to func - tion without latchup. max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 11 esd test conditions esd performance depends on a variety of conditions. contact maxim for a reliability report that documents test setup, test methodology, and test results. human body model esd protection figure 2 shows the hbm and figure 3 shows the cur - rent waveform it generates when discharged into a low- impedance state. this model consists of a 100pf capaci - tor charged to the esd voltage of interest, which is then discharged into the device through a 1.5k resistor. iec 61000-4-2 the iec 61000-4-2 standard covers esd testing and performance of finished equipment. however, it does not specifically refer to integrated circuits. the major differ - ence between tests done using the human body model and iec 61000-4-2 is higher peak current in iec 61000- 4-2 because series resistance is lower in the iec 61000- 4-2 model. hence, the esd withstand voltage measured to iec 61000-4-2 is generally lower than that measured using the human body model. figure 4 shows the iec 61000-4-2 model, and figure 5 shows the current wave - form for the iec 61000-4-2 esd contact discharge test. figure 2. human body esd test model figure 4. iec 61000-4-2 esd test model figure 3. human body current waveform figure 5. iec 61000-4-2 esd generator current waveform charge-current - limit resistor discharge resistance storage capacitor c s 100pf r c 1m r d 1.5k high- voltage dc source devic e under test 100% 36.8% t rl time t dl peak-to-peak ringin g (not drawn to scale) i r 0 0 i peak (amps) 90% 10% charge-current - limit resistor discharge resistance storage capacitor c s 150pf r c 50m to 100m r d 330 high- voltage dc source devic e under test t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak (amps) max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
maxim integrated 12 note: all devices are specified over -40 c to +85 c operating temperature range. +denotes a lead(pb)-free package/rohs-compliant package. t = tape and reel. *ep = exposed pad. **future product contact 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. chip information process: bicmos ordering information/selector guide typical operating circuit part ovlo (v) top mark pin- package max14670 ewl+t 6.8 +14670ewl 15 wlp max14671 ewl+t** 15.5 +14671ewl 15 wlp MAX14672 etb+t** 5.825 azf 10 tdfn-ep* max14673 etb+t** 22 azg 10 tdfn-ep* package type package code outline no. land pattern no. 10 tdfn t1033+1 21-0137 90-0003 15 wlp w151c2+1 21-0686 refer to application note 1891 charger input charger input in out reverse boost charger apps processor p m i c / c h a r g e r o t g_e n usb in otg system battery acok ovlo otg_en 0.1f 0.1f 1f 1f 10k? 10k? v io r1 r2 v bus d o c k i n g s t a t i o n / t a 5v / 12v usb micro-ab 5v / 12v/20v max14670 max14673 acok in out acok ovlo otg_en max14670 max14673 acok max14670Cmax14673 bidirectional current-blocking, high-input overvoltage protector with adjustable ovlo www.maximintegrated.com
? 2013 maxim integrated products, inc. 13 revision history revision number revision date description pages changed 0 6/13 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. max14670Cmax14673 bidirectional current-blocking, high-input 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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