a p34 0 7/a document number: ds 37553 rev. 2 - 2 1 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a 1.2a, 1.4mhz high efficiency synchronous dc - dc buck converter description the ap3407/a is a 1.4mhz fixed frequency, current mode, pwm synchronous buck (step - down) dc - dc converter, capable of driving a 1.2a load with high efficiency, excelle nt line and load regulation. the device integrates synchronous p - channel and n - channel power mosfet switches with low on - resistance. it is ideal for powering portable equipment that runs from a single li - ion battery. a standard series of inductors are available from several different manufacturers optimized for use with the ap3407/a. this feature greatly simplifies the design of switch - mode power supplies. the ap3407 / a is available in sot - 23 - 5 . features ? input voltage range: 2.5v to 5.5v ? output voltage : 0.6v to v in ? adj output ? fixed 1.4mhz frequency ? high efficiency up to 95% ? output current: 1.2a ? current mode control ? 100% duty cycle in dropout ? built - in over current protection ? built - in short circuit protection ? built - in thermal shutdown protection ? built - in uvlo function ? built - in soft - start ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3 ) pin assignments (top view) sot - 23 - 5 f or ap3407 (top view) sot - 23 - 5 f or ap3407 a applications ? datacom ? portable device ? smart phone note 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 fo r 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 1 2 3 4 5 en gnd sw fb vin 1 2 3 4 5 vin gnd en sw fb a p 3 4 0 7 / a - a d j l c o u t c i n v i n r 2 r 1 v o u t 4 . 7 ? f 2 . 2 ? h 2 2 ? f e n v i n s w f b g n d
a p34 0 7/a document number: ds 37553 rev. 2 - 2 2 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a pin description s p in number pin name function ap3407 ap3407a 1 3 en c ontrol input pin. forcing this pin above 1.5v enables the ic. forcing this pin below 0. 4 v shuts down the ic. when the ic is in shutdown mode, all functions are disabled to decrease the supply current below 1 .2 a 2 2 gnd ground pin 3 5 sw power switch output pin. inductor connection to drain of the internal pfet and nfet swi tches 4 1 vin supply input pin. bypass to gnd with a 4.7 f or greater ceramic capacitor 5 4 fb this is the feedback pin of the device. connect this pin directly to the output if the fixed output voltage version is used. for the adjustable version an exte rnal resistor divider is connected to this pin. functional block diagram v o l t a g e r e f e r e n c e o s c i l l a t o r c u r r e n t s e n s e e r r o r a m p l i f i e r p w m c o m p a r a t o r m a x c u r r e n t l i m i t 0 . 6 v v o c p 0 . 4 v l o g i c c l k d r i v e r s h o r t c i r c u i t p r o t e c t i o n r e v e r s e c o m p a r a t o r e n f b g n d s w g n d v i n v i n 1 ( 3 ) 5 ( 4 ) 2 ( 2 ) 4 ( 1 ) 3 ( 5 ) a ( b ) a f o r a p 3 4 0 7 b f o r a p 3 4 0 7 a 4 ( 1 ) 2 ( 2 )
a p34 0 7/a document number: ds 37553 rev. 2 - 2 3 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a absolute maximum ratings (note 4 ) symbol parameter rating unit v in input voltage - 0.3 to 6.0 v v fb feedback voltage - 0.3 to v in +0.3 v v en e n pin voltage - 0.3 to v in +0.3 v v sw sw pin voltage - 0.3 to v in +0.3 ( n ote 6 ) v ja thermal resistance (junction to ambient) 265 c /w jc thermal resistance (junction to case) 60 c/w p d power dissipation 0.377 w t j operating junction temperature ( n ote 5 ) + 150 c t stg storage temperature - 65 to + 150 c t lead lead temperature (sol dering, 10sec) + 260 c note s : 4. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are stres s ratings only, and functional operation of the device at these or any other conditions b eyond those indicated under recommended operating conditions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. 5. the junction temperature rise is given by t rising = p d * ja , where p d is the power dissipated by regulator, ja is the thermal resistance from junction of the die to the ambient temperature; the junction temperature, t j is given by t j = t a +t r , where t a is the ambient temperature. 6 . dc voltage rating, for shor t period of spike voltage , the minimum voltage rating is - 1v, in 20ns . recommended operating conditions symbol parameter min max unit v in input voltage 2.5 5.5 v i out (max) maximum output current 1.2 C a operating ambient temperature - 40 + 85 oc
a p34 0 7/a document number: ds 37553 rev. 2 - 2 4 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a electrical characteristics (@ v in = v dd = v pvdd = 3.3v, t a = +25c , unless otherwise specified . ) symbol parameters conditions min typ max unit v in input voltage C 2. 5 C 5.5 v i q quiescent current v fb = 0.65v C 62 100 a i stby shut down supply current v en = gnd C 0.1 1 a v ref reference voltage for adjustable output voltage 0.588 0.6 0.612 v i fb feedback bias current v fb = v in - 0.1 C 0.1 a ? v out output voltage accuracy C - 2 2 % r ds(on)_ p pmosfet r on i sw = 200ma C 0.28 C ? r ds (on) _n nmosfet r on i sw = - 200ma C 0.25 C ? i lim switch current limit v fb = 0.55v 1.5 2.0 C a v h en pin threshold C 1.5 C C v v l C C C 0.4 v uvlo uvlo threshold v dd rising C 2.3 C v v hys uvlo hysteresis C C 0.2 C f osc oscillator frequency C 1.12 1. 40 1.68 mhz d max max. duty cycle v fb = 0v 100 C C % d min min. duty cycle v fb = 6.5v C C 0 C n - mos sw leakage current v in = 3.3v, v sw = 3.3v C 0.1 C a t soft - start time C C 1 C ms t otsd thermal shutdown C C + 160 C oc t hys thermal shutdown hysteres is C C + 20 C oc
a p34 0 7/a document number: ds 37553 rev. 2 - 2 5 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a performance characteristics efficiency vs. output current efficiency vs. input voltage output voltage vs. output current frequency vs. input voltage frequency vs. temperature feedback voltage vs. temperature 200 400 600 800 1000 1200 40 45 50 55 60 65 70 75 80 85 90 95 100 efficiency (%) output current (ma) v in =3.3v v out =2.5v 2 3 4 5 6 72 80 88 96 efficiency (%) input voltage (v) v out =2.5v i out =0.5a i out =1.0a 200 400 600 800 1000 1200 2.47 2.48 2.49 2.50 2.51 output voltage (v) output current (ma) v in =3.3v v out =2.5v 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 1.3 1.4 1.5 1.6 1.7 1.8 frequency (mhz) input voltage (v) i out =300ma -40 0 40 80 120 160 1.2 1.3 1.4 1.5 1.6 1.7 frequency (mhz) temperature ( o c) v in =3.3v v out =2.5v -40 0 40 80 120 160 0.57 0.58 0.59 0.60 0.61 0.62 feedback voltage (v) temperature ( o c) v in =3.3v
a p34 0 7/a document number: ds 37553 rev. 2 - 2 6 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a performance characteristics (c ont.) ocp current limit vs. temperature r ds(on)_up vs. temperature r ds(on)_low vs. temperature -40 0 40 80 120 160 1.2 1.4 1.6 1.8 2.0 2.2 ocp current limit (a) temperature ( o c) v in =3.3v v fb =0.55v -40 0 40 80 120 160 0.0 0.1 0.2 0.3 0.4 0.5 r ds(on)-up ( ? ) temperature ( o c) v in =3.3v i sw =200ma -40 0 40 80 120 160 0.12 0.16 0.20 0.24 0.28 0.32 r ds(on)-low ( ? ) temperature ( o c) v in =3.3v i sw =200ma
a p34 0 7/a document number: ds 37553 rev. 2 - 2 7 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a ordering information package temperature ran ge part number marking id packing sot - 23 - 5 - 40 to + 85 oc ap3407 ktr - g1 gja 3000/ tape & reel ap3407a ktr - g1 gjb 3000/ tape & reel mark ing information sot - 2 3 - 5 (top view) first l ine : logo and marking id (see ordering information) a p 3 4 0 7 x x x x - x x p a c k i n g p a c k a g e t r : t a p e & r e e l b l a n k : a p 3 4 0 7 p r o d u c t n a m e p r o d u c t v e r s i o n k : s o t - 2 3 - 5 g 1 : g r e e n a : a p 3 4 0 7 a r o h s / g r e e n
a p34 0 7/a document number: ds 37553 rev. 2 - 2 8 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a package outline dimensions (all d imensions in mm (inch) . ) (1) package type: sot - 23 - 5 2 . 8 2 0 ( 0 . 1 1 1 ) 2 . 6 5 0 ( 0 . 1 0 4 ) 1 . 5 0 0 ( 0 . 0 5 9 ) 0 . 0 0 0 ( 0 . 0 0 0 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 9 5 0 ( 0 . 0 3 7 ) 0 . 9 0 0 ( 0 . 0 3 5 ) 0 . 1 0 0 ( 0 . 0 0 4 ) 0 . 2 0 0 ( 0 . 0 0 8 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 8 0 3 . 1 0 0 ( 0 . 1 2 2 ) 1 . 7 0 0 ( 0 . 0 6 7 ) 3 . 0 0 0 ( 0 . 1 1 8 ) 0 . 5 0 0 ( 0 . 0 2 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 3 0 0 ( 0 . 0 5 1 ) 0 . 2 0 0 ( 0 . 0 0 8 ) 0 . 6 0 0 ( 0 . 0 2 4 ) 1 . 8 0 0 ( 0 . 0 7 1 ) 2 . 0 0 0 ( 0 . 0 7 9 ) 0 . 7 0 0 ( 0 . 0 2 8 ) r e f t y p 1 . 4 5 0 ( 0 . 0 5 7 ) m a x
a p34 0 7/a document number: ds 37553 rev. 2 - 2 9 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a suggested pad layout (1) package type: sot - 23 - 5 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e1 (mm)/(inch) e2 (mm)/(inch) value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 1.900/0.075 e 2 e 1 y x g z
a p34 0 7/a document number: ds 37553 rev. 2 - 2 10 of 10 www.diodes.com may 2016 ? diodes incorporated ap3407/a important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the i mplied 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, correctio ns or other changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability a rising out of the application or use of this document or any product described herein; neither does diodes inco rporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold diodes incorporat ed 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 unauthor ized 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 attor ney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pen ding. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english versio n of this 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 system s without the express writ ten 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 t o 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 devices 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 d iodes 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 ? 201 6 , diodes incorporated www.diodes.com
|
