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ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 1 of 13 www.diodes.com september 2010 ? diodes incorporated new product description the ap2145 and ap2155 are integrated high-side power switches optimized for universal serial bus (usb) and other hot-swap applications. the family of devices complies with usb 2.0 and available with both polarities of enable input. they offer current and thermal limiting 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. all devices are available in so-8 and msop-8ep packages. features ? single usb port power switches ? over-current and thermal protection ? 0.8a accurate current limiting ? reverse current blocking ? 90m ? on-resistance ? input voltage rang e: 2.7v ? 5.5v ? 0.6ms typical rise time ? very low shutdown current: 1ua (max) ? fault report (flg) with blanking time (7ms typ) ? esd protection: 6kv hbm, 400v mm ? active high (ap2155) or active low (ap2145) enable ? ambient temperature range -40oc to 85c ? so-8 and msop-8ep (exposed pad): available in ?green? molding compound (no br, sb) ? lead free finish/ rohs compliant (note 1) ? ul recognized, file number e322375 ? iec60950-1 cb scheme certified pin assignments so- 8 1 2 3 4 8 7 6 5 out in nc out en nc gnd flg (top view) msop-8ep 1 2 3 4 8 7 6 5 out in nc out en nc gnd flg (top view) applications ? consumer electronics ? lcd tv & monitor, game machines ? communications ? set-top-box, gps, smartphone ? computing ? laptop, desktop, servers, printers, docking station, hub notes: 1. eu directive 2002/95/ec (rohs). all applicable rohs exemptions applied. please visit our website at http://www.diodes.c om/products/lead_free.html . typical application circuit 0.1uf in gnd en out on 120uf power supply 2.7v to 5.5v 0. 1uf off flg load 10k 10uf available options part number channel enable pin (en) current limit (typical) recommended maximum continuous load current ap2145 1 active low 0.8a 0.5a ap2155 1 active high 0.8a 0.5a
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 2 of 13 www.diodes.com september 2010 ? diodes incorporated new product pin descriptions pin name pin number descriptions en 1 enable input, active low ( ap2145) or active high (ap2155) flg 2 over-current and over-tempe rature fault report; open-drain flag is active low when triggered gnd 3 ground nc 4, 5 no internal connection out 6, 8 voltage output pin (all out pins must be tied together externally) in 7 voltage input pin functional block diagram ap2145, ap2155 thermal sense driver flg out gnd in en uvlo current limit current sense deglitch absolute maximum ratings symbol parameter ratings unit esd hbm human body model esd protection 6 kv esd mm machine model esd protection 400 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 (note 2) -65 to 150 c notes: 2. ul recognized rating from -30c to 70c (diodes qualified t st from -65c to 150c)
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 3 of 13 www.diodes.com september 2010 ? diodes incorporated new product recommended operating conditions symbol parameter min max unit v in input voltage 2.7 5.5 v i out output current 0 500 ma t a operating ambient tem perature -40 85 c electrical characteristics (t a = 25 o c, v in = +5.0v, unless otherwise stated) symbol parameter test conditions min typ. max unit v uvlo input uvlo r load =1k ? 1.6 1.9 2.5 v i shdn input shutdown current dis abled, out = open 0.5 1 a i q input quiescent current enabled, out = open 45 70 a i leak input leakage current disabled, out grounded -1 1 a i rev reverse leakage current disabled, v in = 0v, v out = 5v, i rev at v in 1 a r ds(on) switch on-resistance v in = 5v, i out = 0.5a, - 40 o c t a 85 o c mso-8-ep 90 140 m ? so-8 95 140 m ? v in = 3.3v, i out = 0.5a, -40 o c t a 85 o c 120 160 m ? i short short-circuit current limit enabled into short circuit, c in =10 f, c l =100 f 0.7 a i limit over-load current limit v in = 5v, v out = 4.5v, c in =10 f, c l =100 f, - 40 o c t a 85 o c 0.6 0.8 1.0 a i trig current limiting trigger threshold output current slew rate (<100a/s), c in =10 f, c l =22 f 1.0 a t short short-circuit response time v out = 0v to i out = i limit (short applied to output), c l =100 f 10 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 sink en input leakage v en = 5v 1 a i o-leak output leakage current disabled 1 a t d(on) output turn-on delay time c l =1 f, r load =10 ? 0.05 ms t r output turn-on rise time c l =1 f, r load =10 ? 0.6 1.5 ms t d(off) output turn-off delay time c l =1 f, r load =10 ? 0.01 ms t f output turn-off fall time c l =1 f, r load =10 ? 0.05 0.1 ms r flg flg output fet on-resistance v in = 3.3v or 5v, c in =10 f, i flg =10ma 20 40 ? i flg flg leakage current v flg = 5v 1 a t blank flg blanking time v in = 3.3v or 5v, c in =10 f, c l =100 f 4 7 15 ms t shdn thermal shutdown threshold enabled, r load =1k ? 135 c t hys thermal shutdown hysteresis 25 c ja thermal resistance junction- to-ambient so-8 (note 3) 110 o c/w mso-8-ep (note 4) 60 o c/w notes: 3. test condition for so-8: device mounted on fr-4, 2oz copper, with minimum recommended pad layout. 4. test condition for mso-8-ep: device mounted on 2? x 2? fr -4 substrate pc board, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane.
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 4 of 13 www.diodes.com september 2010 ? 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: ap2145 (left), ap2155 (right) all enable plots are for ap2155 active high turn-on delay and rise time 500us/div turn-off delay and fall time 500us/div turn-on delay and rise time 500us/div turn-off delay and fall time 500us/div vout 2v/div ven 5v/div c l =1uf t a =25c r l =10 ? vout 2v/div ven 5v/div c l =1uf t a =25c r l =10 ? vout 2v/div ven 5v/div c l =100uf t a =25c r l =10 ? vout 2v/div ven 5v/div c l =100uf t a =25c r l =10 ?
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 5 of 13 www.diodes.com september 2010 ? diodes incorporated new product typical performance characteristics (continued) short circuit current, device enabled into short 500us/div inrush current 1ms/div 3 ? load connected to enabled device 2ms/div 2 ? load connected to enabled device 2ms/div short circuit with blanking time and recovery 50ms/div power on 1ms/div iout 200ma/div ven 5v/div iin 200ma/div v in =5v t a =25c c l =100uf ven 5v/div v in =5v t a =25c r l =10 ? c l =470uf c l =220uf c l =100uf iout 500ma/div vflag 2v/div v in =5v t a =25c c l =100uf iout 500ma/div vflag 2v/div v in =5v t a =25c c l =100uf iout 1a/div vout 5v/div vflag 5v/div t a =25c c l =100uf r l =10 ? v in =5v t a =25c c l =100uf vflag 5v/div iout 200ma/div vin 5v/div vout 5v/div
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 6 of 13 www.diodes.com september 2010 ? diodes incorporated new product typical performance characteristics (continued) power off 10ms/div device enabled 1ms/div device disabled 1ms/div uvlo increasing 1ms/div uvlo decreasing 10ms/div iout 200ma/div vin 2v/div t a =25c c l =100uf r l =10 ? iout 200ma/div ven 5v/div vin 2v/div iout 200ma/div t a =25c c l =100uf r l =10 ? t a =25c c l =100uf r l =10 ? iout 200ma/div vin 5v/div ven 5v/div iout 200ma/div t a =25c c l =100uf r l =10 ? t a =25c c l =100uf r l =10 ? vout 5v/div vflag 5v/div vout 5v/div vflag 5v/div vflag 5v/div vout 5v/div
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 7 of 13 www.diodes.com september 2010 ? diodes incorporated new product typical performance characteristics (continued) turn-on time vs input voltage 0 100 200 300 400 500 600 700 800 1.522.533.544.555.56 input voltage (v) turn-on time (us) turn-off time vs input voltage 28 28 29 29 30 30 31 31 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) turn-off time (us) rise time vs input voltage 0 100 200 300 400 500 600 1.522.533.544.555.56 input voltage (v) rise time (us) fall time vs input voltage 19 20 21 22 23 24 25 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 input voltage (v) fall time (us) supply current, output disabled vs ambient temperature 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 -45 -25 -5 15 35 55 75 95 ambient temperature (c) supply current, output disabled (ua) vin=5.0v vin=3.3v vin=5.0v vin=5.5v vin=5.5v vin=3.3v vin=2.7v c l =1uf r l =10 ? t a =25c c l =1uf r l =10 ? t a =25c c l =1uf r l =10 ? t a =25c c l =1uf r l =10 ? t a =25c
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 8 of 13 www.diodes.com september 2010 ? diodes incorporated new product typical performance characteristics (continued) static drain-source on-state resistance vs ambient temperature 65 75 85 95 105 115 125 135 145 -60 -40 -20 0 20 40 60 80 100 ambient temperature (c) static drain-source on-state resistance (m ? ) short-circuit output current vs ambient temperature 720 725 730 735 740 745 750 -60 -40 -20 0 20 40 60 80 100 ambient temperature (c) short-circuit output current (a) undervoltage lockout vs ambient temperature 1.95 1.96 1.97 1.98 1.99 2.00 2.01 2.02 2.03 2.04 2.05 -60 -40 -20 0 20 40 60 80 100 ambient temperature (c) undervoltage lockout (v) threshold trip current vs input voltage 1.10 1.11 1.12 1.13 1.14 1.15 2.8 3.3 3.8 4.3 4.8 5.3 input voltage (v) threshold trip current (a) current limit response vs peak current 0 5 10 15 20 25 30 35 40 45 2345678910 peak current (a) current limit response (us) v in =5v t a =25c c l = 22uf vin=3.3v vin=5v vin=3.3v vin=5v uvlo falling uvlo rising t a =25c c l =22uf
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 9 of 13 www.diodes.com september 2010 ? diodes incorporated new product application note power supply considerations a 0.1- f to 1- f x7r or x5r ceramic bypass capacitor between in and gnd, close to the device, 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 0.01- f to 0.1- 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 current-sense resistors, sense fets do not increase the series resistance of the current path. when an overcurrent condition is detected, the device maintains a constant output current and reduces the output voltage accordingly. complete shutdown occurs only if the fault stays long enough to activate thermal limiting. 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 ap2145/ap2155 senses the shor t circuit and immediately clamps output current to a certain safe level namely i limit . 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 functi on has tripped (reached the over-current trip threshold), the device switches into current limiting mode and t he current is clamped at i limit . in the third condition, the load has been gradually increased beyond the recommended operating current. the current is permitted to ri se until the current-limit threshold (i trig ) is reached or until the thermal limit of the device is exceeded. the ap2145/ap2155 is capable of delivering current up to the current-limit threshold without damaging the device. once the threshold has been reached, the device switches into its current limiting mode and is set at i limit . to protect against short circuit to gnd at extremely low temperature (< -30 o c), a minimum 120- f electrolytic capacitor on the output pin is recommended. a correct capacitor type with capacitor voltage rating and temperature characteristics mu st be properly chosen so that capacitance value does not drop too low at the extremely low temperature operation. a recommended capacitor should have temperat ure characteristics of less than 10% variation of capacitance change when operated at extremely low temp. our recommended aluminum electrolytic capacitor type is panasonic fc series. 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. the flg output remains low until both over-current and over-temperature conditions are removed. connecting a heavy capacitive load to the output of the device can cause a momentary over-curr ent condition, which does not trigger the flg due to the 7-ms deglitch timeout. the ap2145/ap2155 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 rds(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 ap2145/ap2155 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 or short-circuit condition the internal thermal sense circuitry turns the power switch off, thus preventing the power switch from damage. hysteresis is built into 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 ov er-temperature shutdown or over-current occurs with 7-ms deglitch.
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 10 of 13 www.diodes.com september 2010 ? diodes incorporated new product application note (continued) 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 1.9v, even if the switch is enabled. whenever the input voltage falls below approximately 1.9v, the power switch is quickly turned 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. generic hot-plug applications in many applications it may be necessary to remove modules or pc boards while the main unit is still operating. these are considered hot-plug applications. such implementations require the c ontrol of current surges seen by the main power supply and the card being inserted. the most effective way to control these surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in which a power supply normally turns on. due to the controlled rise times and fall times of the ap2145/ap2155, these devices can be used to provide a softer start-up to devices being hot-plugged into a powered system. the uvlo feature of the ap2145/ap2155 also ensures that the switch is off after the card has been removed, and that the switch is off during the next insertion. by placing the ap2145/ap2155 between the v cc input and the rest of the circuitr y, the input power reaches these devices first after insertion. the typical rise time of the switch is approximately 1m s, providing a slow voltage ramp at the output of the device. this implementation controls system surge current and provides a hot-plugging mechanism for any device. ordering information ? ap 21 x 5 x x g -1 3 4 : active low 5 : active high g : green 13 : tape & reel 5 : 1 channel channel green package enable packing s : so-8 mp : msop-8ep device package code packaging (note 5) 13? tape and reel quantity part number suffix ap21x5sg-13 s so-8 2500/tape & reel -13 ap21x5mpg-13 mp msop-8ep 2500/tape & reel -13 notes: 5. pad layout as shown on di odes inc. suggested pad layout document ap 02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 11 of 13 www.diodes.com september 2010 ? diodes incorporated new product marking information (1) so-8 ap21x x ( top view ) yy ww x x part number logo ww : week : 01~52; 52 yy : year : 08, 09,10~ g : green x : internal code 8765 1 2 34 4 : active low 5 : active high 5 : 1 channel represents 52 and 53 week (2) msop-8ep ap21x x ( top view ) y w x e part number logo y : year : 0~9 a~z : green 87 65 1 234 4 : active low 5 : active high 5 : 1 channel a~z : 27~52 week; z represents w : week : a~z : 1~26 week; 52 and 53 week msop-8l-ep
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 12 of 13 www.diodes.com september 2010 ? diodes incorporated new product package outline dimensions (all dimensions in mm) (1) package type: so-8 1.27typ 0.3/0.5 7~9 4.85/4.95 3.85/3.95 5.90/6.10 0.15/0.25 7~9 0.62/0.82 0.10/0.20 gauge plane 0.254 seating plane 0.35max. 45 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 0/8 (2) package type: msop-8ep 2.9/3.1 0.75/0.95 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 / 8 "a" detail "a" 1.35/1.65 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 1.10max. 0.15typ. 0.05/0.15
ap2145/ap2155 0.5a single channel current-limited power switch with output discharge ap2145/ap2155 document number: ds32031 rev. 2 - 2 13 of 13 www.diodes.com september 2010 ? 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 rese rve the right to make modifications, enhanc ements, 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 an y product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of othe rs. 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 incorp orated website, harmless against all damages. diodes incorporated does not warrant or accept any liability what soever in respect of any prod ucts purchased through unauthoriz ed sales channel. should customers purchase or use diodes in corporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives har mless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death a ssociated 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 specifica lly not authorized for use as critical co mponents 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 pr operly used in accordance with instructions for use provided in the labeling can be reasonably expected to re sult 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 t he safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsi ble for all legal, regulatory and safety-related requirements concerning their products and any use of diode s incorporated products in such safety-cri tical, 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 repr esentatives against any damages ar ising out of the use of diodes incorporated products in such safety-c ritical, life support devices or systems. copyright ? 2010, diodes incorporated www.diodes.com

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