_______________________________________________________________ maxim integrated products 1 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com. max14562 36v-capable overvoltage protector with regulated output voltage 19-5570; rev 1; 8/11 general description the max14562 protects valuable consumer circuits against voltage faults of up to +36v. this robust protec - tion is implemented in a three-step scheme for a superior result. if the input is below the preset regulated output- voltage (v prov ) threshold, the output tracks the input minus the voltage drop (r on x i load ) across the pass fet. if the input exceeds v prov , the output is regulated to v prov . if the input rises further and exceeds the over - voltage lockout cutoff threshold (v ovlo ), the output is disconnected from the input. a low resistance 160m i (typ) fet is integrated in the max14562, effectively reducing the component count and application footprint. the max14562 also features thermal shutdown protection against a short-circuit event. the max14562 is specified over the extended -40 n c to +85 n c temperature range and is available in 8-pin tdfn (2mm x 2mm) package. applications features s input voltage protection up to +36v s preset regulated output voltage (+5.15v typ) s integrated 160m i (typ) n-channel mosfet switch s soft-start to minimize in-rush current s overvoltage cutoff protection +8v (typ) s thermal shutdown protection s -40n c to +85n c operating temperature range ordering information + denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. * ep = exposed pad. mobile phones smartphones portable media player pdas digital cameras bluetooth headset e-book mobile internet device typical operating circuit part temp range pin- package top mark max14562eta+t -40n c to +85nc 8 tdfn-ep* adi max14562 in in * * out acok en out gnd 10k 1 f 1 f travel adapter input gnd v bus *only tdfn. v io charger input system load charger output pmic v bus apic with hs usb
max14562 36v-capable overvoltage protector with regulated output voltage 2 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 absolute maximum rating conditions for extended periods may affect device reliability. (voltages referenced to gnd.) in .......................................................................... -0.3v to +40v out ........................................................................ -0.3v to +6v en, acok .............................................................. -0.3v to +6v continuous current through in/out 8-pin tdfn .................................................................... q1.6a 10ms current through in/out 8-pin tdfn ....................................................................... q2a continuous power dissipation (t a = +70 o c): 8-pin tdfn (derate 11.9mw/ n c above +70nc) .......... 953mw operating temperature range ......................... -40n c to +85nc storage temperature range .......................... -65n c to +150nc junction temperature ..................................................... +150nc lead temperature (soldering, 10s) ............................... +300nc soldering temperature (reflow) ..................................... +260nc electrical characteristics (v in = +2.2v to +36v, t a = -40 n c to +85 n c, unless otherwise noted. typical values are at v in = +5.0v and t a = +25 n c.) (note 2) absolute maximum ratings tdfn junction-to-ambient thermal resistance ( b ja ) ...... 83.9 nc/w junction-to-case thermal resistance ( b jc ) .............. 37 nc/w note 1: 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.maxim-ic.com/thermal-tutorial. package thermal characteristics (note 1) parameter symbol conditions min typ max units input voltage v in 2.2 36 v preset regulated output voltage v prov i out = 0ma, v in = 6.5v 4.85 5.15 5.45 v i out = 200ma, v in = 6.5v 4.75 5.15 5.45 i out = 800ma, v in = 6v (note 3) 4.75 5.15 5.45 output voltage v out i out = 0ma v in > v prov v prov v v in < v prov (note 4) v in v overvoltage lockout cutoff threshold rising v ovlo in rising 7.44 8 8.56 v overvoltage lockout hysteresis % of typ v ovlo 1 % input supply current i in en = low, v in = 4.5v, i out = 0ma 120 260 fa en = low, v in = 7v, i out = 0ma 300 550 input shutdown current i in_q en = high, v in = 3v 2.5 5 fa out shutdown current v in = 5v, v out = 4v, en = high -1 +1 fa on-resistance r on v in = 4.75v, i out = 100ma 280 mi ldo load capacitance i out up to 0.8a 10 ff digital signals ( en, acok) en input high voltage v ih 1.4 v en input low voltage v il 0.4 v en input leakage current i leak v en = 0v or 5.5v -150 +150 na acok output low voltage v ol v io = 3.3v, i sink = 1ma (see typical operating circuit ) 0.4 v acok leakage current v io = 3.3v, acok deasserted (see typical operating circuit ) -200 +200 na
max14562 36v-capable overvoltage protector with regulated output voltage 3 electrical characteristics (continued) (v in = +2.2v to +36v, t a = -40 n c to +85 n c, unless otherwise noted. typical values are at v in = +5.0v and t a = +25 n c.) (note 2) note 2: all devices are 100% production tested at t a = +25 n c. limits over the operating temperature range are guaranteed by design and not production tested. note 3: thermally limited, guaranteed by design, and not production tested. note 4: in linear mode, as i out increases, the out voltage drops due to a voltage across q1 (see functional diagram ). note 5: all timing characteristics are measured using 20% and 80% levels unless otherwise specified. figure 1. enable/select time v ovlo v prov v prov min t deb t acok t acok t deb t on t on t off t deb t deb in out i out en acok parameter symbol conditions min typ max units timing characteristics (note 4) input debounce time t deb v in_min < v in < v ovlo until charge pump turns on, see figure 1 10 20 35 ms acok time t acok v in_min < v in < v ovlo to acok low until charge pump turns on, see figure 1 20 40 70 ms turn-on time during soft-start t on r load = 100 i , c load = 1 f f, v out = 20% of v in to 80% of v in , see figure 1 48 fs overvoltage turn-off time t off v in > v ovlo to v out = 80% of v prov , r load = 100 i , see figure 1 1 fs thermal protection thermal shutdown t shdn 150 nc thermal hysteresis t hyst 20 nc
max14562 36v-capable overvoltage protector with regulated output voltage 4 typical operating characteristics (c in = 1f, c out = 4.7f, t a = +25c, unless otherwise noted.) v ovlo vs. temperature max14562 toc08 temperature (c) v ovlo (v) 60 35 10 -15 7.85 7.90 7.95 8.00 7.80 -40 85 normalized debounce time vs. temperature max14562 toc07 temperature (c) 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 v in = 5v i out = 100ma out voltage vs. in voltage max14562 toc06 in voltage (v) out voltage (v) 30 20 10 1 2 3 4 5 6 0 0 40 i out = 100ma v prov vs. temperature max14562 toc05 temperature (c) v prov (v) 60 35 10 -15 5.12 5.14 5.16 5.18 5.20 5.10 -40 85 v in = 6v i out = 100ma normalized on-resistance vs. temperature max14562 toc04 temperature (c) normalized on-resistance 60 35 -15 10 0.7 0.8 0.9 1.0 1.2 1.1 1.3 1.4 0.6 -40 85 i out = 100ma each v in curve is normalized independently at 25c v in = 3v v in = 4.2v normalized on-resistance vs. supply voltage max14562 toc03 supply voltage (v) normalized on-resistance 5.0 4.5 3.5 4.0 3.0 2.5 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 0.6 2.0 5.5 i out = 100ma ldo above 5.15v in supply current vs. temperature max14562 toc02 temperature (c) in supply current (a) 60 35 10 -15 20 40 60 80 100 120 140 160 180 200 0 -40 85 v en = 0v v in = 5v v in = 2.2v in supply current vs. in voltage max14562 toc01 in voltage (v) in supply current (a) 30 20 10 50 100 150 200 250 300 0 0 40 v en = 0v
max14562 36v-capable overvoltage protector with regulated output voltage 5 typical operating characteristics (continued) (c in = 1f, c out = 4.7f, t a = +25c, unless otherwise noted.) switch turn-off time response (r load = 100? ) max14562 toc14 2ms/div 5v 0v 0v 5v 0v 3.3v in 5v/div out 5v/div acok 5v/div switch turn-on time response (r load = 100? ) max14562 toc13 10ms/div 5v 0v 0v 5v 0v 3.3v in 5v/div out 5v/div acok 5v/div load transient (v en = 0v) max14562 toc12 200ns/div 5v 5v in 5v/div out 5v/div i out 500ma/div acok 5v/div 0v 800ma 10ma load transient (v en = 0v) max14562 toc11 200ns/div 5v 5v in 5v/div out 5v/div i out 500ma/div acok 5v/div 0v 800ma 10ma in fall transient response (i out = 10ma) max14562 toc10 250s/div 6v in 5v/div out 5v/div en 5v/div acok 5v/div 4v v prov 4v 0v 0v in rise transient response (i out = 10ma) max14562 toc09 250s/div 6v in 5v/div out 5v/div en 5v/div acok 5v/div 4v v prov 4v 0v 0v
max14562 36v-capable overvoltage protector with regulated output voltage 6 typical operating characteristics (continued) (c in = 1f, c out = 4.7f, t a = +25c, unless otherwise noted.) out short shutdown (thermal) max14562 toc18 20ms/div 6v 2.5a 0a 0v 0v 3v 5v in 5v/div out 2v/div acok 5v/div i out 1a/div acok response (overvoltage condition) (r load = 50? ) max14562 toc17 10ms/div 12v 3v 0v 0v 6v 100ma 0a 5v in 5v/div out 5v/div acok 5v/div i out 100ma/div power-up response (c load = 470f) max14562 toc16 10ms/div 5v 0v 5v 0v 3v 0v 3.3v in 5v/div out 5v/div acok 5v/div en 5v/div power-up response (c load = 470f) max14562 toc15 10ms/div 5v 0v 0v 5v 0v 3.3v in 5v/div out 5v/div acok 5v/div
max14562 36v-capable overvoltage protector with regulated output voltage 7 pin configuration pin description 1 + 3 4 8 6 5 out acok gnd 2 7 out in *connect exposed pad to gnd. *ep en n.c. in tdfn (2mm 2mm) top view max14562 pin name function 1,2 in overvoltage protection input. bypass in with a 1 f f ceramic capacitor to get q 15kv hbm esd protection. no capacitor is required for 2kv hbm esd protection. externally connect both in pins together. 3 en active-low enable input. drive en low to turn on the device. drive en high to turn off the device. 4 n.c. no connection. not internally connected. 5 gnd ground 6 acok open-drain flag output. acok is driven low after input voltage is stable between minimum v in and v ovlo after soft-start time (double of debounce time). connect a pullup resistor from acok to the logic i/o voltage of the host system. 7,8 out overvoltage protection output. bypass out with a 1 f f or larger ceramic capacitor (see table 1). externally connect both out pins together. ep exposed pad. connect ep to gnd.
max14562 36v-capable overvoltage protector with regulated output voltage 8 detailed description the max14562 features the overvoltage protection to the charger input v bus line when a travel adapter (ta) is used. in addition, the max14562 features a low 160m i (typ) on-resistance internal fet (q1) and protects the low-voltage system against voltage faults up to +36v. the max14562 features three-step overvoltage pro - tection. when the input is below the preset regulated output-voltage (v prov ) threshold, the output follows the input minus the voltage drop across the pass fet (r on x i load ). when the input exceeds v prov , the output is regulated to v prov . if the input rises further and exceeds the overvoltage lockout cutoff (v ovlo ) threshold, the output is disconnected from the input. the max14562 also features thermal shutdown protection against short-circuit events. soft-start to minimize inrush current, the max14562 features a soft-start capability to slowly turn on q1. soft-start function permits the device to charge the load capacitor up to 1000 f f by controlled current. the soft- start is initiated when the debounce time ends (out starts charging) and ends when acok is asserted low, 15ms (typ). linear mode when the input voltage exceeds the minimum in volt - age but is below v prov , out follows in with a minimum voltage drop (r on x i load ) across pass fet after the debounce time, t deb , and acok is asserted. the ldo mode needs a capacitor on out. the recom - mended value is 10 f f for load currents up to 800ma (table 1). preset regulated output-voltage mode (prov) when in goes above the preset regulated output voltage (v prov ), q1 provides a constant voltage of v prov at out, and acok is asserted. functional diagram table 1. recommended load capacitance max14562 timing and control logic v bg in ovlo en ok en acok out in bg pok q1 protection hv cp prov control ovlo control load current (ma) load cap (f) 10 1 50 2.2 100 4.7 800 10
max14562 36v-capable overvoltage protector with regulated output voltage 9 overvoltage lockout mode (ovlo) when in goes above the overvoltage lockout threshold (v ovlo ), out is disconnected from in and acok is deasserted. power dissipation increases when the input goes higher than v prov. the overvoltage lockout thresh - old is set to further the power dissipation. when in drops below v ovlo , the debounce time starts counting. after the debounce time (2 x t deb ), out follows in again and acok is asserted. thermal shutdown the max14562 features a thermal shutdown function necessary to protect the device. the device turns off and acok is deasserted when the junction temperature exceeds +150 n c (typ). when the temperature drops 20n c (typ) below 150 n c (typ), the device turns back on and q1 is turned on after the debounce time. applications information power-supply decoupling bypass in pin(s) to ground with a 1 f f or larger ceramic capacitor placed as close as possible to the device. chip information process: bicmos package information for the latest package outline information and land patterns, go to www.maxim-ic.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. package type package code output no. land pattern no. 8 tdfn-ep t822+1 21-0168 90-0064
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications 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. 10 maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. max14562 36v-capable overvoltage protector with regulated output voltage revision history revision number revision date description pages changed 0 9/10 initial release 1 8/11 removed sc70 pin information from data sheet. added additional conditions to preset regulated output voltage parameter in the electrical characteristics table 1, 2, 3, 7, 9
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