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ap7175 document number: ds35606 rev. 4 - 3 1 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part 3a ultra low dropout linear regulator with enable description the ap7175 is a 3.0a ultra low - dropout (ldo) linear regulator that features an enable input and a power - good output. the enable input and power - good output allow users to config ure power management solutions that can meet the sequencing requirements of fpgas, dsps, and other applications with different start - up and power - down requirements. the ap7175 features two supply inputs, for power conversion supply and control. with the separation of the control and the power input very low dropout voltages can be reached and power dissipation is reduced. a precision reference and feedback control deliver 1.5% accuracy over load, line, and operating temperature ranges. the ap7175 is a vailable in so - 8ep and msop - 8ep package with an exposed pad to reduce the junction to case resistance and extend the temperature range it can be used in. features ? v in range: 1.2v to 3.65v v cntl 3.0v to 5.5v ? adjustable output voltage ? continuous output cur rent i out = 3a ? fast transient response ? power on reset monitoring on v cntl and v in ? internal softstart ? stable with low esr mlcc c apacitors ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3) pin assig nments applications ? notebook ? pc ? netbook ? wireless c ommunication ? server ? motherboard ? dongle ? front side bus vtt (1.2v/3.3a) notes: 1. no purposely added lead. fully eu dire ctive 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 halogen - and antimony - free, "green" 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. typical applications circuit figure 1 . typical application circuit g n d f b v o u t e n p g v c n t l v i n s o - 8 e p ( t o p v i e w ) 8 7 6 5 1 2 3 4 v o u t 2 g n d f b v o u t e n p g v c n t l v i n m s o p - 8 e p ( t o p v i e w ) 1 3 4 8 7 6 5 v o u t = p a d ( c o n n e c t e d t o v i n ) o n o f f p g v c n t l v i n e n v o u t f b g n d c 1 r 1 r 2 c i n c o u t c c n t l r 3 * o p t i o n a l 1 0 f 1 f 5 . 1 k 1 0 f 2 4 k 1 2 k a p 7 1 7 5
ap7175 document number: ds35606 rev. 4 - 3 2 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part pin description s p in n ame p in number function so - 8ep m so p - 8ep gnd 1 1 ground fb 2 2 feedback to set the output voltage via an external resistor divider between v out and gnd. v out 3/4 3/4 power output pin. connect at least 10f capacitor to this p in to improve transient response and required for stability. when the part is disabled the output is discharged via an internal pull - low mosfet. v in 5 5 power input pin for current supply. connect a decoupling capacitor (10f) as close as possible to the pin for noise filtering. v cntl 6 6 bias supply for the controller, recommended 5v. connect a decoupling capacitor (1f) as close as possible to the pin for noise filtering. pg 7 7 power good output open drain to indi cate the status of v out via monitoring the fb pin. this pin is pulled low when the voltage is outside the limits, during thermal shutdown and if either v cntl or v in go below their thresholds. en 8 8 enable pin. driving this pin low will disable the part. when left floating an internal current source will pull this pin high and enable it. pad ep ep exposed pad connect this to v in for good thermal conductivity. functional block diagram p o w e r o n r e s e t ( p o r ) 5 a 0 . 8 v r e f c o n t r o l l o g i c s o f t s t a r t v c n t l e n t h e r m a l s h u t d o w n c u r r e n t l i m i t a n d s h o r t c i r c u i t 0 . 8 v r e f d e l a y p o r 9 0 % v r e f v i n p g f b v o u t g n d e r r o r a m p
ap7175 document number: ds35606 rev. 4 - 3 3 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part absolute maximum ratin gs ( note 4) ( @ t a = +25c, unless otherwise specified.) symbol parameter rating unit v in v in supply voltage (v in to gnd) - 0.3 to +4.0 v v cntl v cntl supply voltage (v cntl to gnd) - 0.3 to +7.0 v v out v out to gnd voltage - 0.3 to v in +0.3 v cntl +0.3 v p d power dissipation ( so - 8 ep ) 1.7 w power dissipation ( msop - 8ep ) 1.5 w t j maximum junction temperature + 150 c t stg storage temperature - 65 to +150 c t sdr maximum lea d soldering temperature, 10 seconds + 260 c note : 4 . stresses greater than the 'absolute maximum ratings' specified above, may cause permanent damage to the device. these are str ess 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 absolute maximum rating conditions for extended periods of time. recommended operating conditions (@ t a = +25c, unl ess otherwise specified.) symbol parameter min max unit v cntl v cntl supply voltage 3.0 5.5 v v in v in supply voltage 1.2 3.65 v v out v out output voltage (when v cntl - v out >1.9v) 0.8 v in - v drop v i out v out output current continuous current 0 3 a peak current 0 4 c out v out output capacitance i out = 3a at 25% nominal v out 8 1100 f i out = 2a at 25% nominal v out 8 1700 i out = 1a at 25% nominal v out 8 2400 e srcout esr of v out output capacitor 0 200 m? a ambient temperature - 40 +85 c t j junction temperature - 40 +125 c
ap7175 document number: ds35606 rev. 4 - 3 4 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part electrical characteristics ( v cntl = 5v, v in = 1.8v, v out = 1.2v and t a = - 40 to + 85c, @t a = +25c, unless otherwise specified.) symbol parameter test conditions ap7175 unit min typ max supply current iv cntl v cntl supply current en = v cntl , i out =0a sd v cntl supply current at shutdown en = gnd in supply current at shutdown en = gnd, v in =3.65v power - on - r eset (por) cntl por threshold cntl por hysteresis in por threshold in por hysteresis output voltage v ref reference voltage fb = v out cntl =3.0 v to 5.5v, i out = 0 to 3a, t j = - 40 to +125c - 1.5 out =0a to 3a out =10ma, v cntl = 3.0 to 5.5v - 0.15 out pull - low resistance v cntl = 3.3v, v en = 0v, v out < 0.8v ? fb = 0.8v - 100 dropout voltage v drop v in - to - v out dropout voltage (note 5 ) v cntl = 5.0v, i out = 3a v out = 2.5v t j = +25c j = - 40 to + 125c out = 1.8v t j = +25c j = - 40 to + 125c out = 1.2v t j = +25c j = - 40 to +125c lim current - limit level t j = + 25c , v out = 80% v nom i nal 4.5 5.7 6.7 a t j = - 40 to + 125c 4.2 protections i short short current - limit level v fb < 0.2v sd thermal shutdown temperature t j rising enable and soft - start en rising 0.5 0.8 1.1 v ss soft - start interval out rising 10% 200 350 500 s power - good and delay v thpg rising pg threshold voltage v fb rising 90 92 95 % fb < falling pg voltage threshold fb = v thpg to rising edge of the v pg 1 2 4 ms note: 5. dropout voltage is the voltage difference between the inut and the output at which the outpu t voltage drops 2% below its nominal value.
ap7175 document number: ds35606 rev. 4 - 3 5 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part electrical characteristics ( c ont.) ( v cntl = 5v, v in = 1.8v, v out = 1.2v and t a = - 40 to + 85c, @t a = +25c, unless otherwise specified.) symbol parameter test conditions ap7175 unit min typ max thermal characteristic ja thermal resistance junction - to - ambient so - 8ep (note 6 ) ? ? jc thermal resistance junction - to - case so - 8ep (note 6 ) ? ? notes: 6 . device mounted on 2"*2" fr - 4 substrate pc board, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane. 7 . device mounted on 2"*2" fr - 4 substrate pc board, 2oz copper, with minimum recommended pad layout. typical characteristics
ap7175 document number: ds35606 rev. 4 - 3 6 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part typical characteristics ( c ont .)
ap7175 document number: ds35606 rev. 4 - 3 7 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part power on c out =10f, c in =10f, r l =0.4 ch1: v cntl , 5v/div, dc ch2: v in , 1v/div, dc ch3: v out , 1v/div, dc ch4: v pok , 5v/div, dc time: 2ms/div v in v cntl v out v pok power off c out =10f, c in =10f, r l =0.4 ch1: v cntl , 5v/div, dc ch2: v in , 1v/div, dc ch3: v out , 1v/div, dc ch4: v pok , 5v/div, dc time: 2ms/div v in v cntl v o ut v pok load transient response i out = 10 ma to 3a to10ma (rise / fall time =1 s) c out = 10f, c in = 10f ch1: v out , 5 0m v/div, a c ch2: i out , 1 a /div, dc time: 50 s/div v out i out over current protection c out = 10f, c in = 10f , i out = 2a to 5.6a ch1: v out , 0.5 v/div, d c ch2: i out , 2a /div, dc time: 0.2m s/div v out i out operating waveforms ( @ v cntl = 5v, v in = 1.8v, v out = 1.2v , t a = +25c, unless otherwise specified.)
ap7175 document number: ds35606 rev. 4 - 3 8 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part shutdown c out = 10f, c in = 10f, r l = 0.4 ch1: v e n , 5v/div, dc ch2: v out , 1v/div, dc ch3: v pok , 5 v/div, dc ch4: i o ut , 2a /div, dc time: 4 s/div v e n v out v pok i out enable c out = 10f, c in = 10f, r l = 0.4 ch1: v e n , 5v/div, dc ch2: v out , 1v/div, dc ch3: v pok , 5 v/div, dc ch4: i o ut , 2a /div, dc time: 1m s/div v e n v out v pok i out operating waveforms ( c ont.) (@ v cntl = 5v, v in = 1.8v, v out = 1.2v , t a = +25 c, unless otherwise specified.)
ap7175 document number: ds35606 rev. 4 - 3 9 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part application information power good and delay ap7175 monitors the feedback voltage v fb on the fb pin. an internal delay timer is started after the pg voltage threshold (v thpg ) on the fb pin is reached. at the end of the delay time an internal nmos of the pg is turned off to indicate that the power at the output is good (pg). this monitoring function is continued during operation and if v fb falls 8% (typ ) below v thpg , the nmos of the pg is turned on after a delay time of typical 10s to avoid oscillating of the pg signal. power on reset ap7175 monitors both supply voltages, v cntl and v in to ensure operation as intended. a soft - start process is initiated after both voltages exceed their por threshold during power on. during operation the por component continues to monitor the supply voltage and pulls the pg lo w to indicate an out of regulation supply. this function will engage without regard to the status of the output. soft - start ap717 5 incorporates an internal soft - start function. the output voltage rise is controlled to limit the current surge during start - up. the typical soft - start time is 0.6ms . current - limit protection ap7175 monitors the current flow through the nmos and limits t he maximum current to avoid damage to the load and ap7175 during overload conditions. short circuit current - limit protection ap7175 incorporates a current limit function to reduce the maximum current to 1.1a (typ ) when the volt age at fb falls below 0.2v ( typ ) during an overload or short circuit situation. during start - up period, this function is disabled to ensure successful heavy load start - up. enable control if the enable pin (en) is left open, an internal current source of ~5a pulls the pin up and en ables the ap7175. this will reduce the bill of material saving an external pull up resistor. driving the enable pin low disables the device. driving the pin high subsequently initia tes a new soft - start cycle. output voltage regulation output voltage is se t by resistor divider from v out via fb pin to gnd. internally v fb is compared to a 0.8v temperature compensated reference voltage and the nmos pass element regulates the output voltage while delivering current from v in to v out . setting the output voltage a resistor divider connected to fb pin programs the output voltage. r1 is connected from v out to fb with kelvin sensing connection. r2 is connected from fb to gnd. to improve load transient response and stability, a bypass capacito r can be connected in parallel with r1. (optional in typical application circuit) power sequencing ap7175 requires no specific sequencing between v in and v cntl . however, care should be taken to avoid forcing v out for prolonged time without the presence of v in . conduction through internal parasitic diode (from v out to v in ) could damage ap7175. thermal shutdown the pcb layout and power requirements for ap7175 under normal operation condition should allow enough cooling to restrict the junction temperature t o + 125c. the packages for ap7175 have an exposed pad to support this. these packages provide better connection to the pcb and thermal performance. refer to the layout considerations. if ap7175 junction temperature reaches + 170c a thermal protection blo ck disables the nmos pass element and lets the part cool down. after its junction temperature drops by 50c (typ ), a new soft - start cycle will be initiated. a new thermal protection will start, if the load or ambient conditions continue to raise the juncti on temperature to + 170c. this cycle will repeat until normal operation temperature is maintained again. v 2 r 1 r 1 * v v ref out ? ? ? ? ? ? ? ?
ap7175 document number: ds35606 rev. 4 - 3 10 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part application information ( c ont.) output capacitor an output capacitor (c out ) is needed to improve transient response and maintain stability. the esr (equivalent series resistance) and capacitance drives the selection. care needs to be taken to cover the entire operating temperature range. the output capacitor can be an ultra - low - esr ceramic chip capacitor or a low esr bulk capacitor like a solid t antalum, poscap or aluminum electrolytic capacitor. c out is used to improve the output stability and reduces the changes of the output voltage during load transitions. the slew rate of the current sensed via the fb pin in ap7175 is reduced. if the applica tion has large load variations , it is recommended to utilize low - esr bulk capacitors. it is recommended to place ceramic capacitors as close as possible to the load and the ground pin and care should be taken to reduce the impedance in the layout. input c apacitor to prevent the input voltage from dropping during load steps it is recommended to utilize an input capacitor (c in ). as with the output capacitor the following are acceptable, ultra - low - esr ceramic chip capacitor or low esr bulk capacitor like a so lid tantalum, poscap or aluminum electrolytic capacitor. typically it is recommended to utilize an capacitance of at least 10f to avoid output voltage drop due to reduced input voltage. the value can be lower if v in changes are not critical for the applic ation. layout considerations for good ground loop and stability, the input and output capacitors should be located close to the input, output, and ground pins of the device . no other application circuit is connected within the loop. avoid using vias withi n ground loop. if vias must be used, multiple vias should be used to reduce via inductance. the regulator ground pin should be connected to the external circuit ground to reduce voltage drop caused by trace impedance. ground plane is generally used to red uce trace impedance. wide trace should be used for l arge current paths from v in to v out , and load circuit. place the r1, r2, and c1 (optional) near the ldo as close as possible to avoid noise coupling. r 2 is placed close to device ground . connect the g round of the r2 to the gnd pin by using a dedicated tra ce . connect the pin of the r1 directly to the load for kelvin sensing . no high current should flow through the ground trace of feedback loop and affect reference voltage stability. for the packages with exposed pads , h eat sinking is accomplished using the heat spreading capability of the pcb and its copper traces. suitable pcb area on the top layer and thermal vias(0.3mm drill size with 1mm spacing, 4~8 vias at least) to the vin power plane can help to reduce device temperature greatly. reference layout plots top layer bottom layer vin gnd en p g vin v out en c in c out gnd fb r1 r 2 vcntl p g gnd 1 c 1 c cntl
ap7175 document number: ds35606 rev. 4 - 3 11 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part ordering information part number package code packaging 13 tape and reel quantity part number suffix ap7175sp - 13 sp so - 8ep 2 5 00/tape & reel - 13 ap7175mp - 13 mp msop - 8ep 2 5 00/tape & reel - 13 marking information (1) so - 8ep (2) msop - 8ep a p 7 1 7 5 x x - 1 3 p a c k i n g p a c k a g e s p : s o - 8 e p m p : m s o p - 8 e p 1 3 : t a p e & r e e l ( t o p v i e w ) a p 7 1 7 5 y y w w x l o g o p a r t n o 8 1 e w w : w e e k : 0 1 ~ 5 2 ; 5 2 y y : y e a r : 0 8 , 0 9 , 1 0 ~ x : i n t e r n a l c o d e r e p r e s e n t s 5 2 a n d 5 3 w e e k s o - 8 e p x g : g r e e n 5 4 a p 7 1 7 5 ( t o p v i e w ) y w x e p a r t n u m b e r l o g o y : y e a r : 0 ~ 9 a ~ z : i n t e r n a l c o d e 8 7 6 5 1 2 3 4 a ~ z : 2 7 ~ 5 2 w e e k ; z r e p r e s e n t s w : w e e k : a ~ z : 1 ~ 2 6 w e e k ; 5 2 a n d 5 3 w e e k m s o p - 8 e p
ap7175 document number: ds35606 rev. 4 - 3 12 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part package outline dimensions please see http://www.diodes.com/package - outlines.html for the latest version. (1) so - 8ep (2) msop - 8ep so - 8ep dim min max typ a 1.40 1.50 1.45 a1 0.00 0.13 - b 0.30 0.50 0.40 c 0.15 0.25 0.20 d 4.85 4.95 4.90 e 3.80 3.90 3.85 e0 3.85 3.95 3.90 e1 5. 90 6.10 6.00 e - - 1.27 f 2.75 3.35 3.05 h 2.11 2.71 2.41 l 0.62 0.82 0.72 n - - 0.35 q 0.60 0.70 0.65 all dimensions in mm msop - 8ep dim min max typ a - 1.10 - a1 0.05 0.15 0.10 a2 0.75 0.95 0.86 a3 0.29 0.49 0.39 b 0.22 0.38 0.30 c 0.08 0.23 0.15 d 2.90 3.10 3.00 d1 1.60 2.00 1.80 e 4.70 5.10 4.90 e1 2.90 3.10 3.00 e2 1.30 1.70 1.50 e3 2.85 3.05 2.95 e - - 0.65 l 0.40 0.80 0.60 a 0 8 4 x - - 0.750 y - - 0.750 all dimensions in mm 1 b e e1 a a1 9 (all side) 4 3 c q n 45 r 0.1 7 d e0 e l seating plane gauge plane f h exposed pad 1 d a a1 a2 e e y x seating plane gauge plane 0.25 l 4x10 4x10 d 8xb see detail c detail c c a e1 e3 a3 d1 e2
ap7175 document number: ds35606 rev. 4 - 3 13 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part suggested pad layout please see http://www.diodes.com/package - outlines.html for the latest version. (1) so - 8ep (2) msop - 8ep dimensions value (in mm) c 0.650 g 0.450 x 0.450 x1 2.000 y 1.350 y1 1.700 y2 5.300 dimensions value (in mm) c 1.270 x 0.802 x1 3.502 x2 4.612 y 1.505 y1 2.613 y2 6.500 c y1 x1 x y y2 x2 x c y y2 y1 x1 g
ap7175 document number: ds35606 rev. 4 - 3 14 of 14 www.diodes.com january 2017 ? diodes incorporated ap7175 not recommended for new design - no alternate part important notice diodes incorporated makes no warranty of any kind, express or implied, with rega rds 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 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 incorporated 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 incorporated and all the companies whose products are represented on diodes i ncorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in re spect of any products purchased through unauthorized 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 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 o r 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. this document is written in english but may be translated into multiple languages for reference. only the english version 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 i n 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 i n the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any co mponent 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 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 incorpora ted 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 incorpora ted 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 7 , diodes incorporated www.diodes.com

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