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ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 1 of 15 www.diodes.com june 2011 ? diodes incorporated new product description the ap2401 and ap2411 are single channel current-limited integrated high-side power switches optimized for universal serial bus (usb) and other hot-swap applications. the family of devices complies with usb standards and is available with both polarities of enable input. the devices have fast short-circuit response time for improved overall system ro bustness, and have integrated output discharge function to ensure completely controlled discharging of the output volt age capacitor. they provide a complete protection solution for applications subject to heavy capacitive loads and the prospec t of short circuit, and offer reverse current blocking, over-current, over-temperature and short-circuit protection, as well as controlled rise time and under-voltage lockout functionality. a 7ms deglitch capability on the open-drain flag output prevents false over-current reporting and does not require any external components. ap2401 and ap2411 will be latched off after 7ms deglitch. all devices are available in so-8, msop-8ep and dfn3030-8 packages. features ? single channel current-limited power switch ? output discharge function ? output current latch-off when ocp triggered ? fast short-circuit response time: 2s ? 2.5a accurate current limiting ? reverse current blocking ? 70m ? on-resistance ? input voltage rang e: 2.7v ? 5.5v ? built-in soft-start with 0. 6ms typical rise time ? over-current and thermal protection ? fault report (flg) with blanking time (7ms typ) ? esd protection: 4kv hbm, 300v mm ? active low (ap2401) or active high (ap2411) enable ? ambient temperature range: -40oc to 85c ? so-8, msop-8ep and dfn3030-8: available in ?green? molding compound (no br, sb) ? lead free finish / rohs compliant (note 1) ? ul recognized, file number e322375 (pending) ? iec60950-1 cb scheme certified pin assignments applications ? lcd tvs & monitors ? set-top-boxes, residential gateways ? laptops, desktops, servers, e-readers ? printers, docking stations, hubs note: 1. eu directive 2002/95/ec (rohs) . all applicable rohs exemptions applied. see eu directive 2002/95/ec annex notes. (top view) 1 2 3 4 8 7 6 5 nc out flg out gnd en in in so-8 1 2 3 4 8 7 6 5 out flg out gnd en in in nc msop-8ep (top view) en gnd nc 1 2 in 3 4 6 5 8 7 flg in out out dfn3030-8 (top view)
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 2 of 15 www.diodes.com june 2011 ? diodes incorporated new product typical application circuit 0.1uf in gnd en out on 120uf power supply 2.7v to 5.5v 0.1uf off flg load 10k enable active high available options part number channel enable pin (en) recommended maximum continuous load current (a) typical current limit (a) package ap2401 1 active low 2.0a 2.5a so-8 msop-8ep dfn3030-8 ap2411 1 active high pin descriptions pin name pin number descriptions gnd 1 ground in 2, 3 voltage input pin; connect a 0.1f or larger cera mic capacitor from in to gnd as close as possible. (all in pins must be tied together externally) en 4 enable input, active low ( ap2401) or active high (ap2411) flg 5 over-temperature and over -current fault reporting with 7ms deglitch; active low open-drain output. flg is disabled for 7ms after turn-on. out 6, 7 voltage output pin (all out pins must be tied together externally) nc 8 no internal connection; recommend tie to out pins exposed pad - internally connected to gnd; recommend connec ting to the gnd externally for improved power dissipation
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 3 of 15 www.diodes.com june 2011 ? diodes incorporated new product functional block diagram thermal sense flg out gnd in en uvlo current limit current sense deglitch discharge control driver absolute maximum ratings symbol parameter ratings unit esd hbm human body model esd protection 4 kv esd mm machine model esd protection 300 v v in input voltage 6.5 v v out output voltage v in + 0.3 v v en , v flg enable voltage 6.5 v i load maximum continuous load current internal limited a t jmax maximum junction temperature 150 c t st storage temperature range (n ote 2) -65 to 150 c note: 2. ul recognized rating from -30c to 70c (diodes qualified t st from -65c to 150c) recommended operating conditions symbol parameter min max unit v in input voltage 2.7 5.5 v i out output current 0 2.0 a t a operating ambient te mperature -40 85 c
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 4 of 15 www.diodes.com june 2011 ? diodes incorporated new product electrical characteristics (t a = 25 c, v in = +5.0v, c in = 0.1f, c l = 1f, unless otherwise specified) symbol parameter test conditions (note 3) min typ. max unit v uvlo input uvlo v in rising 1.6 2.0 2.4 v v uvlo input uvlo hysteresis v in decreasing 50 mv i shdn input shutdown current disab led, out = open 0.1 1 a i q input quiescent current enabled, out = open 60 100 a i leak input leakage current disable d, out grounded 0.1 1 a i rev reverse leakage current disabled, v in = 0v, v out = 5v, i rev at v in 0.01 1 a r ds(on) switch on-resistance v in = 5v, i out = 2.0a t a = 25 o c 70 84 m? -40 o c t a 85 o c 105 v in = 3.3v, i out = 2.0a t a = 25 o c 90 108 -40 o c t a 85 o c 135 i limit over-load current limit (note 3) v in = 5v, v out = 4.5v -40 o c t a 85 o c 2.0 2.5 2.85 a i trig current limiting trigger threshold output current slew rate (<100a/s) 2.5 a i short short-circuit current limit enabled into short circuit 2.1 2.75 3.3 a t short short-circuit response time v out = 0v to i out = i limit (out shorted to ground) 2 s v il en input logic low voltage v in = 2.7v to 5.5v 0.8 v v ih en input logic high voltage v in = 2.7v to 5.5v 2 v i leak-en en input leakage v in = 5v, v en = 0v and 5.5v 0.01 1 a i leak-o output leakage current disabled, v out = 0v 0.5 1 a t d(on) output turn-on delay time c l = 1f, r load = 5 ? 0.1 ms t r output turn-on rise time c l = 1f, r load = 5 ? 0.6 1.5 ms t d(off) output turn-off delay time c l = 1f, r load = 5 ? 0.1 ms t f output turn-off fall time c l = 1f, r load = 5 ? 0.05 0.1 ms r flg flg output fet on-resistance i flg = 10ma 20 40 ? i foh flg off current v flg = 5v 0.01 1 a t blank flg blanking and latch off time assertion or deassertion due to overcurrent and over-temperature condition 4 7 15 ms t dis discharge time c l = 1f, v in = 5v, disabled to v out < 0.5v 0.6 ms r dis discharge resistance (note 4) v in = 5v, disabled, i out = 1ma 100 ? t shdn thermal shutdown threshold enabled 140 c t hys thermal shutdown hysteresis 20 c ja thermal resistance junction-to- ambient so-8 (note 5) 96 c/w msop-8ep (note 6) 92 c/w dfn3030-8 (note 6) 84 c/w notes: 3. pulse-testing techniques maintain junction temperature close to ambient temper ature; thermal effects must be taken in to account separately. 4. the discharge function is active when the device is disabled (when enable is de-asserted or during power-up power-down when v in < v uvlo ) . the discharge function offers a resistive discharge path for the external storage capacitor for limited time. 5. device mounted on 2? x 2? fr-4 substrate pcb, 2oz copper, with minimum recommended pad layout. 6. device mounted on 2? x 2? fr-4 substrate pcb, 2oz copper , with minimum recommended pad on top layer and thermal vias to bot tom layer ground plane.
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 5 of 15 www.diodes.com june 2011 ? diodes incorporated new product typical performance characteristics v en 90% v out t d(on) 10% t d(off) 50% 50% t r 10% 90% t f v en 90% v out t d(on) 10% t d(off) 50% 50% t r 10% 90% t f figure 1. voltage waveforms: ap2401 (left), ap2411 (right) all enable plots are for enable active low turn-off delay and fall time t a =25c v in =5v cl=120f r out =2.5? vout 2v/div ven 5v/div iin 1a/div device disable turn-on delay and rise time t a =25c v in =5v cl=120f r out =2.5? vout 2v/div ven 5v/div iin 1a/div inrush current limit device enable turn-off delay and fall time t a =25c v in =5v cl=1f r out =2.5? vout 2v/div ven 5v/div iin 1a/div device disable turn-on delay and rise time t a =25c v in =5v cl=1f r out =2.5? vout 2v/div ven 5v/div iin 1a/div device enable
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 6 of 15 www.diodes.com june 2011 ? diodes incorporated new product typical performance characteristics (cont.) device enabled into short-circuit inrush current full-load to short-circuit transient response output short circuit t a =25c v in =5v r out =2.5? device turns off and re-enables into current-limit vout 2v/div iin 2a/div flg 5v/div device is latched-off no-load to short-circuit transient response output short circuit t a =25c v in =5v vout 2v/div iin 2a/div flg 5v/div device is latched-off device turns off and re-enables into current-limit t a =25c v in =5v cl=120f r out =1 ? ven 5v/div iout 1a/div iout 1a/div ven 5v/div t a =25c v in =5v cl=120f,220uf, 470f r out =5 ? cl=220f cl=470f cl=120f
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 7 of 15 www.diodes.com june 2011 ? diodes incorporated new product typical performance characteristics (cont.) vin 2v/div iout 2a/div uvlo decreasing t a =25c v in =5v r out =2.5? cl=120f uvlo increasing vin 2v/div iout 2a/div t a =25c v in =5v r out =2.5? cl=120f t a =25c v in =5v r out =2.5? cl=120f vout 5v/div flg 5v/div iiout 1a/div power on vin 5v/div
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 8 of 15 www.diodes.com june 2011 ? diodes incorporated new product typical performance characteristics (cont.) 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn-on vs. input voltage turn-on time (s) c = 1f r = 5 t = 25c l l a 0 20 40 60 80 100 120 140 160 180 200 220 240 260 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn-off vs. input voltage turn- o ff ti m e (s) 0 100 200 300 400 500 600 700 800 900 1000 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) rise time vs. input voltage rise ti m e (s) c = 1f r = 5 t = 25c l l a 0 10 20 30 40 50 60 70 80 90 100 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) fall time vs. input voltage fall ti m e (s)
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 9 of 15 www.diodes.com june 2011 ? diodes incorporated new product typical performance characteristics (cont.) 0 10 20 30 40 50 60 70 80 90 100 -50 - 25 0 25 50 75 100 125 temperature (c) supply current, output enabled vs. temperature supply current o utput enabled ( a ) v = 5.5v in v = 5v in v = 2.7v in v = 3.3v in -50 -25 0 25 50 75 100 125 temperature (c) supply current, output disabled vs. temperature supply current o utput disabled ( a ) -0.30 0.30 0.25 0.20 0.15 0.10 -0.05 0 -0.10 0.05 -0.15 -0.20 -0.25 v = 5.5v in v = 5v in v = 2.7v in v = 3.3v in 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 -50 -25 0 25 50 75 100 125 temperature (c) r vs. temperature ds(on) r ( m ) ds(on) v = 5.5v in v = 5v in v = 2.7v in v = 3.3v in 3.0 -50 -25 0 25 50 75 100 125 temperature (c) short-circuit, output current vs. temperature short-circuit o utput current ( a ) 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.0 2.1 v = 5.5v in v = 5v in v = 2.7v in v = 3.3v in 2.05 -50 -25 0 25 50 75 100 125 temperature (c) undervoltage lockout vs. temperature undervoltage lockout (v) 2.10 2.15 1.90 1.95 2.00 1.65 1.70 1.75 1.80 1.85 uvlo falling uvlo rising 2.5 2.6 2.7 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn-off vs. input voltage threshold trip current ( a ) 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 c = 120f t = 25c l a
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 10 of 15 www.diodes.com june 2011 ? diodes incorporated new product application notes power supply considerations a 0.1 f to 2.2 f x7r or x5r ceramic bypass capacitor placed between in and gnd, close to the device, is recommended. when an external power supply is used, or an additional ferrite bead is added to the input, high inrush current may cause voltage spikes higher than the device maximum input rating during short circuit condition. in this case a 2.2 f or bigger capacitor is recommended. placing a high-value electrolytic capacitor on the input and output pin(s) is recommended when the output load is heavy. this precaution reduces power-supply transients that may cause ringing on the input. additionally, bypassing the output with a 0.1 f to 1.0 f ceramic capacitor improves the immunity of the device to short circuit transients. over-current and short circuit protection an internal sensing fet is employed to check for over- current conditions. unlike cu rrent-sense resistors, sense fets do not increase the series resistance of the current path. when an overcurrent c ondition is detected, the devices will limit the current un til the overload condition is removed or the internal deglit ch time (7-ms typical) is reached and the device is turned off. the device will remain latched off even overload condition is removed until power is cycled or the device enable is toggled. three possible overload conditions can occur. in the first condition, the output has been shorted to gnd before the device is enabled or before vin has been applied. the ap2401/ap2411 senses the shor t circuit and immediately clamps output current to a certain safe level namely i limit , and turns off after deglit ch time(7-ms typical). in the second condition, an output short or an overload occurs while the device is enabled. at the instance the overload occurs, higher current may flow for a very short period of time before the curr ent limit function can react. after the current limit function has tripped (reached the over-current trip threshold), the device switches into current limiting mode and th e current is clamped at i limit current for deglitch time period (7-ms typical), and then turned off. in the third condition, the load has been gradually increased beyond the recommended operating current. the current is permitted to rise until the current-limit threshold (i trig ) is reached or until the thermal limit of the device is exceeded. the ap2401/ap2411 is capable of delivering current up to the cu rrent-limit threshold without damaging the device. once the threshold has been reached, the device switches into its current limiting mode and output current is clamped at i limit for deglitch time period (7-ms typical), and then turned off. flg response when an over-current or over-temperature shutdown condition is encountered, the flg open-drain output goes active low after a nominal 7-ms deglitch timeout. when that happens, the flg will remain low and the switch will be latched off until the fault condition is removed. connecting a heavy capacitive load to the output of the device can cause a momentary over-current condition, which does not trigger the flg due to the 7-ms deglitch timeout. the ap2401/ap2411 is designed to eliminate false over-current reporting without the need of external components to remove unwanted pulses. power dissipation and junction temperature the low on-resistance of the internal mosfet allows the small surface-mount packages to pass large current. using the maximum operating ambient temperature (ta) and r ds(on), the power dissipation can be calculated by: p d = r ds(on) i 2 finally, calculate the junction temperature: t j = p d x r ja + t a where: t a = ambient temperature c r ja = thermal resistance p d = total power dissipation thermal protection thermal protection prevents the ic from damage when heavy-overload or short-circ uit faults are present for extended periods of time. the ap2401/ap2411 implements a thermal sensing to monitor the operating junction temperature of the power distribution switch. once the die temperature rises to approximately 140c due to excessive power dissipation in an over-current condition, the internal ther mal sense circuitry turns the power switch off, thus preventing the power switch from damage. hysteresis is built in to the thermal sense circuit allowing the device to cool down approximately 25c before the switch turns back on. the switch continues to cycle in this manner until the load fault or input power is removed. the flg open-drain output is asserted when an over-temperature shutdown occurs with 7-ms deglitch. when the flg is asserted, the switch will be latched off until the temperature drops to 20 c below the thermal shutdown threshold and the power or en pin is cycled. under-voltage lockout (uvlo) under-voltage lockout function (uvlo) keeps the internal power switch from being turned on until the power supply has reached at least 2v, ev en if the switch is enabled. whenever the input voltage falls below approximately 2v, the power switch is quickly tu rned off. this facilitates the design of hot-insertion systems where it is not possible to turn off the power switch before input power is removed.
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 11 of 15 www.diodes.com june 2011 ? diodes incorporated new product application notes discharge function the discharge function of t he device is active when enable is disabled or de-asserted. the discharge function with the n-mos po wer switch implementation is activated and offers a resistive discharge path for the external storage capacitor. this is designed for discharging any residue of the output voltage when either no external output resistance or load resistance is present at the output. ordering information ? a p 2 4 x 1 x xx - x 0 : active low 1 : active high 7/13 : tape & reel 1 : 1 channel channel package enable packing s : so-8 mp : msop-8ep fge : dfn3030e-8 device package code packaging (note 7) 7?/13? tape and reel quantity part number suffix AP24X1S-13 s so-8 2500/tape & reel -13 ap24x1mp-13 mp msop-8ep 2500/tape & reel -13 ap24x1fge-7 fge dfn3030-8 3000/tape & reel -7 note: 7. pad layout as shown on diodes inc. suggested pad layout document ap02001, which c an be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. marking information (1) so-8 ap24 x 1 ( top view ) yy ww x x part number logo ww : week : 01~52; 52 yy : year : 08, 09,10~ x : internal code 8765 1 2 34 0 : active low 1 : active high 1 : 1 channel represents 52 and 53 week x : internal code
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 12 of 15 www.diodes.com june 2011 ? diodes incorporated new product marking information (cont.) (2) msop-8ep ? ap24 x 1 (top view) y w x e part number logo y : year : 0~9 a~z : internal code 87 65 1234 0 : active low 1 : active high 1 : 1 channel a~z : 27~52 week; z represents w : week : a~z : 1~26 week; 52 and 53 week msop-8ep (3) dfn3030-8 xx : identification code ( top view ) x : a~z : internal code xy x x w y : year : 0~9 w : week : a~z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week part number package identification code ap2401fge-7 dfn3030-8 bd ap2411fge-7 dfn3030-8 bf package outline dimensions (all dimensions in mm) (1) package type: so-8 ? 1.27typ 0.3/0.5 7x~9x 4.85/4.95 3.85/3.95 5.90/6.10 0.15/0.25 7x~9x 0.62/0.82 0.10/0.20 gauge plane 0.254 seating plane 0.35max. 45x detail "a" detail "a" 1.30/1.50 1.75max. land pattern recommendation (unit: mm) 6x-1.27 8x-1.55 8x-0.60 5.4 0x/8x
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 13 of 15 www.diodes.com june 2011 ? diodes incorporated new product package outline dimensions (cont.) (all dimensions in mm) (2) package type: msop-8ep (3) package type: dfn3030-8 bottom view side view 0.10 c 0.08 c seating plane c 2.95/3.05 2.95/3.05 (pin #1 id) a b 0.10 c ab 0.25 a 2x- 0.25 b 2x- top mark 0.15typ. 0/0.05 0.57/0.63 0.30/0.60 0.65typ. 0.20/0.30 8x-0.30 0.65 land pattern recommendation (unit: mm) top view 8x- r 0 . 2 0 1.40/1.60 8x- 8x-0.65 1.60 2.75 2.35 c l c l c l c l pin #1 ? 2.9/3.1 0.7 5/ 0.9 5 2. 9/3 .1 4.7/ 5.1 0.65bsc. 0.22/0.38 0.05 0.4/0.8 0. 25 0.95ref. gauge plane 0 x/ 8 x "a" detail "a" 1.3 5/1 .65 1.65/1.95 exposed pad (bottom) 8x-0.45 8x-1.4 6x-0.65 exposed pad (bottom) 1 1 1 land pattern recommendation (unit:mm) 4.4 1.1 0max. 0.1 5t yp. 0.05/0.15
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 14 of 15 www.diodes.com june 2011 ? diodes incorporated new product taping orientation (note 8) for dfn3030-8 note: 8. the taping orientation of the other package type c an be found on our website at h ttp://www.diodes.c om/datasheets/ap 02007.pdf
ap2401/ap2411 2.0a single channel current-limited power switch with latch-off ap2401/ap2411 document number: ds35113 rev. 3 - 2 15 of 15 www.diodes.com june 2011 ? diodes incorporated new product important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liabi lity arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized a pplication. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety-critical, life support devices or systems. copyright ? 2011, diodes incorporated www.diodes.com

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