View AP1507-D5L-U_9094777.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 1 of 12 www.diodes.com may 2012 ? diodes incorporated description the ap1507 is a monolithic ic designed for a step-down dc/dc converter and is capable of drivi ng a 3a load without an external transistor. due to reducing the number of external components, the board space can be saved easily. the external shutdown function can be controlled by logic level and then come into standby mode. the internal compensation makes the feedback control have good line and load regulation without an external design. regarding the protected function, the thermal shutdown is to prevent over temperature operating from damaging the device, and current limit is against over current operating of the output switch. if the current limit function occurred and v fb is down to 0.5v below, the switching frequency will be reduced. the ap1507 series operates at a switching frequency of 150khz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. other features include a guaranteed + 4% tolerance on output voltage under specified input voltage and output load conditions, and + 15% on the oscillator frequency. the output version included a fixed 3.3v, 5v, 12v, and an adjustable type. ap1507 is available in a 5-lead to-252 lead-free or green package. features ? output voltage: 3.3v, 5v, 12v and adjustable output version ? adjustable version output voltage range, 1.23v to 18v + 4% ? 150khz + 15% fixed switching frequency ? voltage mode non-synchronous pwm control ? thermal-shutdown and current-limit protection ? on/off shutdown control input ? operating voltage can be up to 22v ? output load current: 3a ? low power standby mode ? built-in switching transistor on chip ? ap1507-xxd5l-xx ? totally lead-free; rohs compliant (notes 1 & 2) ? ap1507-xxd5-xx ? totally lead-free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. ?green? device (note 3) pin assignments (top view) to252-5l 5 sd 4 fb 3 gnd 2 output metal tab gnd 1 v in applications ? simple high-efficiency step-down regulator ? on-card switching regulators ? positive to negative converter notes: 1. no purposely added lead. fully eu directiv e 2002/95/ec (rohs) & 2011/6 5/eu (rohs 2) compliant. 2. see http://www.diodes.com for more in formation about diodes incorpor ated?s definitions of halogen- and antimony-free, "gree n" and lead-free. 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.
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 2 of 12 www.diodes.com may 2012 ? diodes incorporated typical application circuit (1) fixed type circuit 12 3 5 4 12v dc input c in capacitor fb sd d1 schottky diode v in gnd output ap1507 -33 co capacitor inductor l1 33uh 3.3v/3a output load (2) adjustable type circuit 12 3 5 4 12v dc input c in capacitor fb sd d1 schottky diode v in gnd output ap1507 co capacitor l1 47uh 5v/ 3a output load r2 r1 v out = v fb (1 + r2 r1 ) v fb = 1.23v, r2 = 1k ~ 3k (3) delay start circuit 12 3 5 4 12v dc input c in capacitor fb sd d1 schottky diode v in gnd output ap1507 co capacitor l1 47uh 5v/ 3a output load r2 r1 c delay 0.1uf 10k r delay
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 3 of 12 www.diodes.com may 2012 ? diodes incorporated pin descriptions pin number pin name description 1 v in operating voltage input 2 output switching output 3 gnd ground 4 fb output voltage feedback control 5 sd on / off shutdown functional block diagram current source bias 1.235v reference 2.5v regulator 150khz osc. start up + + _ + _ thermal shutdown pre- driver comp comp gnd output v in sd fb 220mv 200mv 3a switch + _ _ amp comp frequency compen- sation
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 4 of 12 www.diodes.com may 2012 ? diodes incorporated absolute maximum ratings (t a = 25 c) (note4) symbol parameter rating unit esd hbm human body model esd protection 2 kv esd mm machine model esd protection 200 v v cc supply voltage +24 v v sd on/off pin input voltage -0.3 to +18 v v fb feedback pin voltage -0.3 to +18 v v out output voltage to ground -1 v p d power dissipation internally limited w t st storage temperature -65 to +150 o c t j operating junction temperature -40 to +125 o c note: 4. stresses greater than the 'absolute maximum ratings' sp ecified above, may cause permane nt damage to the device. these are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. device reliability may be affected by exposure to absolu te maximum rating conditions for extended periods of time. recommended operating conditions (t a = 25 c) symbol parameter min max unit i out output current 0 3 a v op operating voltage 4.5 22 v t a operating ambient temperature -20 +85 o c
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 5 of 12 www.diodes.com may 2012 ? diodes incorporated electrical characteristics (all output voltage versions) unless otherwise specified, v in = 12v for 3.3v, 5v, adjustable version and v in = 18v for the 12v version. i load = 0.5a specifications with boldface type are for full operating temperature range, the other type are for t j = 25c. symbol parameter conditions min typ max unit i fb feedback bias current v fb = 1.3v ( adjustable version only ) -10 -50 na -100 f osc oscillator frequency 127 150 173 khz 110 173 f scp oscillator frequency of short circuit protect when current limit occurred and v fb < 0.5v, t a = 25 o c 10 30 50 khz v sat saturation voltage i out = 3a no outside circuit v fb = 0v force driver on 1.4 1.6 v 1.7 dc max. duty cycle (on) v fb = 0v force driver on 100 % min. duty cycle (off) v fb = 12v force driver off 0 i cl current limit peak current no outside circuit v fb = 0v force driver on 3.6 4.5 5.5 a 6.5 i leak output = 0v output leakage current no outside circuit v fb =12v force driver off -200 a output = -1v v in = 22v -5 ma i q quiescent current v fb = 12v force driver off 5 10 ma i stby standby quiescent current on/off pin = 5v v in = 22v 70 150 a 200 v il on/off pin logic input threshold voltage low (regulator on) - 1.3 0.6 v v ih high (regulator off) 2.0 - i h on/off pin logic input current v logic = 2.5v (off) -0.01 a i l on/off pin input current v logic = 0.5v (on) -0.1 -1 ja thermal resistance to252-5l junction to case 10 o c/w jc thermal resistance with copper area of approximately 2cm 2cm to252-5l junction to ambient 50 o c/w
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 6 of 12 www.diodes.com may 2012 ? diodes incorporated electrical characteristics (all output voltage versions) specifications with boldface type are for full operating temperature range, the other type are for t j = 25oc. symbol parameter conditions v min typ. v max unit ap1507-adj v fb output feedback 5v < v in < 22v 0.2a < i load < 3a v out programmed for 3v 1.193 1.18 1.23 1.267 1.28 v efficiency v in = 12v, i load = 3a 74 % ap1507-3.3v v out output voltage 5.5v < v in < 22v 0.2a < i load < 3a 3.168 3.135 3.3 3.432 3.465 v efficiency v in = 12v, i load = 3a 75 % ap1507-5v v out output voltage 8v < v in < 22v 0.2a < i load < 3a 4.8 4.75 5 5.2 5.25 v efficiency v in = 12v, i load = 3a 80 % ap1507-12v v out output voltage 15v < v in < 22v 0.2a < i load < 3a 11.52 11.4 12 12.48 12.6 v efficiency v in = 16v, i load = 3a 89 %
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 7 of 12 www.diodes.com may 2012 ? diodes incorporated typical characteristics -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) efficiency vs. temperature effi c ien c y (%) 83 82 81 80 79 78 74 73 72 77 76 75 v = 12v v = 5v i = 3a in out o -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) efficiency vs. temperature effi c ien c y (%) 78 77 76 75 72 71 70 74 73 v = 12v v = 3.3v i = 3a in out o -50 -25 0 25 50 75 100 125 temperature (c) saturation voltage vs. temperature satu r ati o n v o lta g e (v) 1.6 1.5 1.4 1.3 1.2 0.9 0.8 0.7 1.1 1 3a 2a 1a 0.5a v = 12v v = 0v v = 0v cc fb sd -50 -25 0 25 50 75 100 125 temperature (c) switch current limit vs. temperature swit c h c u r r ent limit (a) 1.6 1.4 1.2 0.9 0.7 1.1 v = 12v v = 0v cc fb -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) supply current vs. temperature suppl y c u r r ent (m a ) 15 14 13 12 11 07 06 05 09 08 10 v = 12v no load v = 0v switch on cc on -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) supply current vs. temperature suppl y c u r r ent (a) 60 55 50 35 30 40 45 v = 12v no load v = 5v switch off cc off
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 8 of 12 www.diodes.com may 2012 ? diodes incorporated typical characteristics (cont.) -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) threshold voltage vs. temperature t h r es h o ld v o l t a g e (v) 1.7 1.6 1.5 0.9 0.8 1.1 1.3 1.4 1.0 1.2 v = 12v i = 100ma cc o 0 3 6 9 12 15 18 21 on/off voltage (v) on/off current vs. on/off voltage on/off current (na) 10 0 -10 -90 -100 -60 -40 -30 -80 -50 -70 -20 v = 12v in -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) frequency vs. temperature f r e q u en c y (k h z) 170 165 160 145 140 150 155 v = 12v i = 500ma v= 5v cc o out -50 -30 -10 10 30 50 70 90 130 110 150 temperature (c) feedback current vs. temperature feedba c k c u r r e n t (na) 10 0 -10 -40 -50 -30 -20 v = 12v v = 5v v = 1.3v cc fb out -40 -2 0 20 40 60 80 100 140120 160 temperature (c) output voltage vs. temperature voltage output (v) 3. 5 3.4 3.3 3.0 2.9 3.1 3.2 3.45 3.35 3.25 2.95 3.05 3.15 v = 12v i = 3a in o
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 9 of 12 www.diodes.com may 2012 ? diodes incorporated application information pin functions +v in this is the positive input supply fo r the ic switching regulator. a suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. ground circuit ground. output internal switch. the voltage at this pin switches between (+v in ? v sat ) and approximately ? 0.5v, with a duty cycle of approximately v out / v in . to minimize coupling to sensitive circuitry, the pc board copper ar ea connected to this pin should be kept at a minimum. feedback (fb) senses the regulated output voltage to complete the feedback loop. on/off (sd) allows the switching regulator ci rcuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 150ua. pulling this pin below a threshold voltage of approximately 1.3v turns the regulator on, and pulling this pin above 1.3v (up to a maximum of 18v) shuts the regulator down. if this shutdown feature is not needed, the on/off pin can be wired to the ground pin. thermal considerations the to-252 surface mount package tab is designed to be soldered to the copper on a printed circuit board. the copper and the board are the heat sink for this package and the other heat producing components, such as the catch diode and inductor. the pc board copper area that the package is soldered to should be at least 0.8 in 2 , and ideally should have 2 or more square inches of 2 oz. additional copper area which improves the thermal characteristi cs. with copper areas greater than approximately 6in 2 , only small improvements in heat dissipation are realized. if further thermal improvements are needed, double sided, multi-layer pc board with large copper areas and/or airflow will be recommended. the ap1507 (to-252 package) junction temperature rises above ambient temperature with a 3a load for various input and output voltages. this data was taken with the circuit operating as a buck-switching regulator with all components mounted on a pc board to simulate the junction temperature under actual operating conditions. this curv e can be used for a quick check for the approximate junction tem perature for various conditions, but there are many factors that can affect the junction temperature. when load currents higher than 3a are used, double sided or multi-layer pc boards with large copper areas and/or airflow might be needed, especially for high ambient temperatures and high output voltages. for the best thermal performance, wide copper traces and generous amounts of printed ci rcuit board copper should be used in the board layout. (one exception to this is the output (switch) pin, which should not have large areas of copper.) large areas of copper provide the best transfer of heat (lower thermal resistance) to the surrounding air, and moving air lowers the thermal resistance even further. package thermal resistance and junction temperature rise numbers are all approximate, and there are many factors that will affect these numbers. some of these factors include board size, shape, thickness, position, location, and even board temperature. other factors are trace width, total printed circuit copper area, copper thickness, single or double-sided, multi- layer board and the amount of solder on the board. the effectiveness of the pc board to dissipate heat also depends on the size, quantity and spacing of other components on the board, as well as whether the surrounding air is still or moving. furthermore, some of these components such as the catch diode will add heat to the pc board and the heat can vary as the input voltage changes. for the inductor, depending on the physical size, type of core material and the dc resistance, it could either act as a heat sink taking heat away from the board, or it could add heat to the board.
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 10 of 12 www.diodes.com may 2012 ? diodes incorporated ordering information package d5 : to252-5l output version ap1507 - xx xx x x packing -u : tube -13 : tape & reel blank : adjustable 33 : 3.3v 50 : 5.0v 12 : 12v lead free l : lead free blank : green device package code packaging (note 5) tube/bulk 13? tape and reel quantity part number suffix quantity part number suffix ap1507-xxd5l-xx d5 to252-5l 80 -u 2500/tape & reel -13 ap1507-xxd5-xx d5 to252-5l not available 2500/tape & reel -13 note: 5. pad layout as shown on diodes inc. suggested pad la yout document ap02001, which can be found on our website at http://www.diodes .com/datasheets/ap02001.pdf marking information (1) to252-5l 1507 - xx output type : blank : adjustable 1507-50 : 5.0v 1507-12 : 12v logo internal code xth week : 01~52 year : ( top view ) "08" = 2008 "07" = 2007 yy ww x x l : lead free blank : green 1507-33 : 3.3v pb lead-free
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 11 of 12 www.diodes.com may 2012 ? diodes incorporated package outline dimensions (a ll dimensions in mm) package type: to252-5l suggested pad layout package type: to252-5l to252-5l dim min max typ a 2.19 2.39 2.29 a1 0.00 0.13 0.08 a2 0.97 1.17 1.07 b 0.51 0.71 0.583 b2 0.61 0.79 0.70 b3 5.21 5.46 5.33 c2 0.45 0.58 0.531 d 6.00 6.20 6.10 d1 5.21 ? ? e ? ? 1.27 e 6.45 6.70 6.58 e1 4.32 ? ? h 9.40 10.41 9.91 l 1.40 1.78 1.59 l3 0.88 1.27 1.08 a 0 10 ? all dimensions in mm dimensions value (in mm) x 5.6 x1 0.6 y 11.0 y1 5.6 y2 2.0 c1 7.2 c2 1.27 b3 e 5x b2 d a c2 e a1 l l3 5x b a h a2 e1 y2 y y1 x c 2 c1 x1
ap1507 150khz, 3a pwm buck dc/dc converter ap1507 document number: ds31067 rev. 3 - 2 12 of 12 www.diodes.com may 2012 ? diodes incorporated 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 ? 2012, diodes incorporated www.diodes.com

▲Up To Search▲

Price & Availability of AP1507-D5L-U

	To Download AP1507-D5L-U Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .