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a p3513e document number: ds 36692 rev. 2 - 2 1 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product 18v, 3a synchronous dc - dc buck converter description the AP3513E is a 500khz fixed frequency, current mode, pwm synchronous buck (step - down) dc - dc converter, capable of driving a 3a load with high efficiency, excellent line and load regulat ion. the AP3513E exhibits high efficiency at light load. the device integrates n - channel power m osfet switch with low on - resistance. current mode control provides fast transient response and cycle - by - cycle current limit. the AP3513E employs complete p rotection to ensure system security, including output over voltage protection, input under voltage lock out, programmable soft - start, over temperature protection and hiccup mode short circuit protection. this ic is available in so - 8 ep package . fea tures ? input voltage range: 4.5v to 18v ? fixed 500khz frequency ? high efficiency at light load ? output current: 3a ? current mode control ? built - in over current protection ? built - in thermal shutdown function ? built - in uvlo function ? built - in over voltage protectio n ? programmable soft - start ? hiccup mode scp ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3 ) pin assignments (top view) (so - 8 ep / mp package ) applications ? monitor ? tv ? stb ? datacom n ote s: 1 . no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of hal ogen - and antimony - free, "green" and lead - f ree . 3. halogen - and antimony - free "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. typical applications circuit c c c o u t 2 2 f * 2 l r e n 1 0 0 k r 2 r 1 r c c p o p t i o n a l c b s 1 0 n f c s s 0 . 1 f 3 5 1 6 7 8 2 4 a p 3 5 1 3 e b s i n s w g n d f b c o m p e n s s i n p u t v o l t a g e = 1 2 v o u t p u t v o l t a g e = 3 . 3 v c i n 1 0 f * 2 4 . 7 h 3 . 3 n f 1 3 k 1 0 k 2 6 . 1 k 1 2 3 4 8 7 6 5 bs in sw gnd ss en comp fb ep
a p3513e document number: ds 36692 rev. 2 - 2 2 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product pin description s pin number p in name function 1 bs bootstrap pin. a bootstrap capacitor is connected between the bs pin and sw pin. the voltage across the bootstrap capacitor drives the internal high - side nmos switch. 2 in supply input pin. a capacitor should be connected between the in pin and gnd pin to keep the dc input voltage constant. 3 sw power switch output pin. this pin is connected to the inductor and bootstrap capacitor. 4 gnd ground pin 5 fb feedback pin. this pin is connected to an external resistor divider to program the system output voltage. when the fb pin voltage exceeds 1.1v, the over voltage protection is triggered. when the fb pin voltage is below 0.3v, the oscillator frequency is lowered to realize short circuit protec tion. 6 comp compensation pin. this pin is the output of the transconductance error amplifier and the input to the current comparator. this pin is used to compensate the control loop. connect a series rc network from this pin to gnd pin. in some cases, a n additional capacitor from this pin to gnd pin is required. 7 en enable inpu t. en is a digital input that turns the regulator on or off. drive en high to turn on the regulator, drive it low to turn off. pull up with 100k resistor for automatic startup. 8 ss soft - start control input pin. ss controls the soft start period. connect a capacitor from ss to gnd to set the soft - start period. a 0.1f capacitor sets the soft - start period to 15ms. to disable the soft - start feature, leave ss unconnected. C ep exposed pad. it should be connected to gnd in pcb layout. functional block di agram s r q q i n t e r n a l r e g u l a t o r o s c i l l a t o r 2 7 5 4 3 1 v a b s s w g n d e a 6 c o m p f b e n i n c o m p a r a t o r 8 s s c u r r e n t s e n s e a m p l i f i e r c l k s l o p c o m p p w m c o m p a r a t o r 1 . 1 v + s c p v a v b v b 5 a 1 8 0 k / 5 0 0 k 0 . 9 2 5 v 2 . 5 v m 1 m 2 0 . 3 v c o m p a r a t o r 1 . 5 v s h u t d o w n l o c k
a p3513e document number: ds 36692 rev. 2 - 2 3 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product absolute maximum ratings ( note 4 ) symbol parameter rating unit v in i n pin voltage - 0.3 to 20 v v en en pin voltage - 0.3 to v in v v sw sw pin voltage 21 v v bs bs pin voltage - 0.3 to v sw +6 v v fb f b pin voltage - 0.3 to 6 v v comp comp pin voltage - 0.3 to 6 v v ss ss pin voltage - 0.3 to 6 v t j operating junction temperature + 150 oc t stg storage temperature - 65 to + 150 oc t lead lead temperature (soldering, 10sec) + 260 oc ja thermal resistance (junction to ambient) so - 8 ep 60 o c/w v hbm esd (human body model) 2000 v v mm esd (machine model) 200 v note 4 : stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are stres s ratings only, an d functional operation of the device at these or any other conditions beyond those indicated under recommended operating condi tions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. recommen ded operating conditions symbol parameter min max unit v in input voltage 4.5 18 v t a operating ambient temperature - 40 + 85 oc
a p3513e document number: ds 36692 rev. 2 - 2 4 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product electrical characteristics ( v in = v en = 12v, v out = 3.3v, t a = + 25oc, unless otherwise specified. ) symbol parameter co nditions min typ max unit supply voltage (in pin) v in input voltage C 4.5 C 18 v i q quiescent current v fb = 1v, v en = 3.3v C 1.2 1.4 ma i shdn shutdown supply current v en = 0v C 0.1 1.0 a under voltage lockout v uvlo input uvlo threshold v in rising 3. 65 4.0 4.25 v v hys input uvlo hysteresis C C 0.2 C v enable (en pin) C en shutdown threshold voltage C 1.1 1.5 2 v C en shutdown threshold voltage hystere - sis (note 5 ) C C 350 C mv C en lockout threshold voltage C 2.2 2.5 2.7 v C en lockout hyster esis C C 210 C mv voltage reference (fb pin) v fb feedback voltage C 0.907 0.925 0.943 v v fbov feedback over voltage threshold C C 1.1 C v i fb feedback bias current v fb = 1v - 0.1 C 0.1 a mosfet r dsonh high - side switch on - resistance (note 6 ) i sw = 0. 2a&0.7a C 100 C m r dsonl low - side switch on - resistance (note 6 ) i sw = - 0.2a& - 0.7a C 100 C m current limit i leakh high - side switch leakage current v in = 18v, v en = 0v, v sw = 0v C 0.1 10 a i limh high - side switch current limit C 4.3 5.6 C a i liml low - side switch current limit from drain to source C 50 C ma switching regulator f osc1 oscillator frequency C 410 500 590 khz f osc2 short circuit oscillator frequency C C 180 C khz d max max. duty cycle v fb = 0.85v C 90 C % d min min. duty cycle v fb = 1v C C 0 %
a p3513e document number: ds 36692 rev. 2 - 2 5 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product electrical characteristics ( cont. v in = v en = 12v, v out = 3.3v, t a = + 25oc, unless otherwise specified. ) symbol parameter conditions min typ max unit error amplifier a ea error amplifier voltage gain (note 5 ) C C 400 C v/v g ea error ampl ifier transconductance C C 800 C a/v g cs comp to current sense transconductance C C 5.2 C a/v thermal shutdown t otsd thermal shutdown (note 5 ) C C + 160 C oc t hys thermal shutdown hysteresis (note 5 ) C C + 30 C oc soft start (ss pin) t ss soft - start time (note 5 ) c ss = 0.1 f C 15 C ms C soft - start current C C 5 C a notes: 5 . not tested, guaranteed by design . 6 . r dson = sw2 sw1 sw2 sw1 i - i v - v
a p3513e document number: ds 36692 rev. 2 - 2 6 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product performance characteristics ( v in = 12v, v out = 3.3v, l = 4.7h, t a = + 25 c, unless otherwise n oted. ) efficiency vs. output current quiescent current vs. temperature feedback voltage vs. temperature output ripple (i out = 2.5 a) load transient response (i out = 0.2a to 2.5a) load transient response (i out = 1a to 2.5a) v sw ( 1 0 v/div ) v out - ac (20mv /div ) i l (1a /div ) v out - ac (200mv /div ) i out (1a /div ) v out - ac (100mv /div ) i out (1 a /div ) time( 1 s/div) time( 100 s/div) time( 100 s/div) -50 -25 0 25 50 75 100 125 150 0.6 0.7 0.8 0.9 1.0 1.1 1.2 feedback voltage (v) temperature ( o c) 0.01 0.1 1 10 20 30 40 50 60 70 80 90 100 efficiency (%) output current (a) v in =12v v out =3.3v, l=4.7 ? h v out =5.0v, l=6.8 ? h -50 -25 0 25 50 75 100 125 150 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 quiescent current (ma) temperature ( o c)
a p3513e document number: ds 36692 rev. 2 - 2 7 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product performance characteristics (cont. v in = 12v, v out = 3.3v, l = 4.7h, t a = + 2 5 c, unless otherwise noted. ) power on from vin (i out = 2.5 a ) power off from vin (i out = 2.5 a ) power on from en (i out = 2.5 a ) power off from e n (i out = 2.5 a ) short circuit protection (i out = 2.5 a ) short circuit protection recovery (i out = 2.5 a ) v in (10v /div ) v out (2v /div ) i l (1a /div ) v in (10v /div ) v out (2v /div ) i l (1a /div ) v en (2v /div ) v out (2v /div ) i l (1a /div ) v en (2v /div ) v out (2v /div ) i l (1a /div ) v ss (2 v /div ) v out (2v /div ) v sw (10v /div ) i l (2a /div ) v ss (2v /div ) v out (2v /div ) v sw (10v /div ) i l (2a /div ) time( 3.20m s/div) time( 3.20m s/div) time( 3.20m s/div) time( 3.20m s/div) time( 64m s/div) time( 64m s/div)
a p3513e document number: ds 36692 rev. 2 - 2 8 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product ordering information diodes ics pb - free products with "g1" suffix in the part number, are rohs compliant and green . package temperature range part number marking id packing so - 8 ep - 40 to + 85 ? c AP3513Emp - g1 3513emp - g1 100/ tube AP3513Emptr - g1 3513emp - g1 400 0 / tape & reel marking information (1) so - 8 ep (top view) first and s econd line s : logo and marking id third line: date code y: year ww: work week of molding 4 : assembly s ite code xx: 7 th and 8 th digits of batch number 3513e mp - g1 yww4xx a p 3 5 1 3 e x x x x - x x p a c k i n g p a c k a g e p r o d u c t n a m e r o h s / g r e e n t r : t a p e & r e e l b l a n k : t u b e m p : s o - 8 e p g 1 : g r e e n
a p3513e document number: ds 36692 rev. 2 - 2 9 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product package outline dimensions (all d imensions in mm (inch) . ) (1) package type: so - 8 ep 8 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 1 . 2 7 0 ( 0 . 0 5 0 ) 0 . 4 0 0 ( 0 . 0 1 6 ) 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 0 . 0 5 0 ( 0 . 0 0 2 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 0 0 . 2 5 0 ( 0 . 0 1 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 5 5 0 ( 0 . 0 6 1 ) 2 . 1 1 0 ( 0 . 0 8 3 ) 2 . 7 1 0 ( 0 . 1 0 7 ) 2 . 7 5 0 ( 0 . 1 0 8 ) 3 . 4 0 2 ( 0 . 1 3 4 ) 5 . 1 0 0 ( 0 . 2 0 1 ) n o t e : e j e c t h o l e , o r i e n t e d h o l e a n d m o l d m a r k i s o p t i o n a l . 0 . 3 0 0 ( 0 . 0 1 2 )
a p3513e document number: ds 36692 rev. 2 - 2 10 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of diodes incorporated new product suggested pad layout (1) package type: so - 8 ep dimensions z (mm)/(inch) g (mm)/(i nch) x (mm)/(inch) y (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 dimensions x1 (mm)/(inch) y1 (mm)/(inch) e (mm)/(inch) --- value 3.600/0.142 2.700/0.106 1.270/0.050 --- g e x x 1 y y 1 z
a p3513e document number: ds 36692 rev. 2 - 2 11 of 11 www.diodes.com january 2014 ? diodes incorpo rated AP3513E a product line of 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). d iodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or o ther changes without further notice to this document and any product described herein. diodes incorporated does not assume any liab ility arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license unde r its patent or trademark rights, nor the rights of others. any customer or user of this document or prod ucts described 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 diod es incorporated website, harmless against all damages. diodes incorporat ed does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channe l. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall in demnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized app lication. products described herein may be covered by one or more united states, international or foreign patents pending. product nam es and markings noted herein may also be covered by one or more united states, international or foreign trademarks. thi s document is written in english but may be translated into multiple languages for reference. only the english version of th is document is the final and determinative format released by diodes incorporated. 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 s ystems 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 i n the labeling can be reasonably expected to result in signific ant 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 expe cted to cause the failure of the life support device or to affect its safety or effectiveness. cu stomers 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 requiremen ts 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 ? 2012, diodes incorporated www.diodes.com

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