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ap22800 document number: ds36046 rev. 3 - 2 1 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product 5v single channel programmable load switch description the ap22800 is an integrated n - channel load switch , which features an adjustable ramp - up and discharge rate that are settable via an external capacitor and a resistor, respectively. in addition, it incorporates a power good output to flag when the switch is enhanced. the n - channel mosfet has a typical r ds(on) of 1 6 m , enabling current handling capability of up to 4 a . the ap22800 is des igned to operate from 1.5v to 5 .5 v making it ideal for 1.8v, 2.5v, 3.3v, 5v voltage rails . the low quiescent supply current specification of 21 a makes it ideal for use in battery powered distribution systems where power consumption is a concern. the ap 22800 is available in a standard green u - dfn2116 - 8 package with an exposed pad for improved thermal performance and is rohs compliant. features ? 1.5v to 5 .5 v input r ange ? low typical r ds(on) of 1 6 m ? very low quiescent c urrent of 21 a ? adjustable s tart - up and discharge r ate ? small form factor package u - dfn2116 - 8 C f ootprint of just 3.36mm 2 ? thermally efficient low profile ? totally lead - free & fully rohs c ompliant (notes 1 & 2) ? halogen and antimony free. green device (note 3) pin assignments applications ? integrated load s witches in ultrabook pcs ? powe r up/down sequencing in ultrabook pcs ? tablets ? ssd (solid state drives) ? consumer electronics ? telecom systems ? set - top boxes ? e - readers 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 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 applicatio ns circuit 8 7 6 1 2 3 1 2 3 8 7 6 t o p v i e w b o t t o m v i e w u - d f n 2 1 1 6 - 8 5 4 4 5 v o u t v o u t d i s p g v i n v i n e n s s v i n v i n e n s s g n d g n d v i n s s e n g n d v o u t d i s p g c l r l r d i s c s s c i n o n o f f r p g a p 2 2 8 0 0
ap22800 document number: ds36046 rev. 3 - 2 2 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product pin description s functional block diagram pin name pin number function vin 1, 2 input voltage. en 3 enable input, a ctive h igh. s s 4 soft - start adjust. an external capacitor connected to this pin will set the ramp - up time of vout . p g 5 power good. open - drain output to indicate when the switch is fully enhanced. dis 6 output discharge . an external resistor between dis and vout sets the discharge rate at vout when en goes low. vout 7, 8 output voltage. this pin connects to the s ource of the n - channel mosfet. gnd pad ground. power good d i s s s e n g n d v i n v o u t p g p o w e r g o o d ? c h a r g e p u m p
ap22800 document number: ds36046 rev. 3 - 2 3 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product absolute maximum ratings (@ t a = +25c, unless otherwise specified.) (note 4) symbol parameter ratings units esd hbm human body esd p rotection 2 000 v esd mm machine model esd p rotection 200 v v in input voltage 6.0 v v out output voltage 6.0 v v en enable voltage 6.0 v i l load c urrent 4.0 a t j(max) maximum j unction t emperature + 125 c t st storage t emperature - 55 to + 150 c p d power dissipation (note 5 ) 0. 35 w (note 6 ) 1.42 r ja thermal resistance, junction to ambient (note 5 ) 290 c/w (note 6 ) 7 1 r j c thermal resistance, junction to case 8.5 c/w notes: 4. stresses greater than the 'absolute maximum ratings' specified above may cause permanent damage to the device. these are stre ss 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. 5 . for a device surface mounted on minimum recommended pad layout, in still a ir conditions; the device is measured when operating in a steady state condition. 6 . for a device surface mounted on 25mm by 25mm by 1.6mm fr4 pcb with high coverage of single sided 2oz copper, in still air c onditions; the device is measured when operating in a steady state condition. recommended operating conditions (@ t a = +25c, unless otherwise specified.) symbol parameter min max units v in input voltage range 1.5 5.5 v v e n enable voltage range 0 5.5 v v pg power good voltage range 0 5.5 v t a operating ambient temperature - 40 +85 c
ap22800 document number: ds36046 rev. 3 - 2 4 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product electrical characteristics (@ t a = +25c, c in = 1 f, c l = 100nf , unless otherwise specified.) v in = 5.0v symbol parameters conditions min typ max unit i in _ q input quiescent current v en = v in , i out = 0a C in_sd input shutdown current v en = 0v, i out = 0a , r dis = 240 C ds(on) load switch on - resistance v e n = v in , i out = ? C m ih_en en input logic high voltage C C C i l _en en input logic low voltage C C C leak _en en input leakage v en = v in C C d s_d i s discharge fet on - resistance v en = 0v, i dis = 10ma C ol_pg power good output low level i ol_pg = 100a, v en = 0v C C oz_pg power good high - impedance current v pg = v in , v e n = v in C C rise output rise t ime r l = 10 ? ss = 10nf C C on output turn - on delay time r l = 10 ? ss = 10nf C C fall output fall time r l = open , r dis = 240, ss = 10nf C C off output turn - off delay time r l = open, r dis = 240 ss = 10nf C C d output start delay time r l = 10 ? ss = 10nf (note 7 ) C C pg power good delay time r l = 10 ? ss = 10nf C C v in = 3.3 v symbol parameters conditions min typ max unit i in _ q input quiescent current v en = v in , i out = 0a C in_sd input shutdown current v en = 0v, i out = 0a , r dis = 240 C ds(on) load switch on - resistance v e n = v in , i out = ? C m ih_en en input logic high voltage C C C i l _en en input logic low voltage C C C leak _en en input leakage v en = v in C C d s_di s discharge fet on - resistance v en = 0v , i dis = 10ma C ol_pg power good output low level i ol_pg = 100a, v en = 0v C C oz_pg power good high - impedance current v pg = v in , v e n = v in C C rise output rise t ime r l = 10 ? ss = 10nf C C on output turn - on delay time r l = 10 ? ss = 10nf C C fall output fall time r l = open , r dis = 240, ss = 10nf C C off output turn - off delay time r l = open, r dis = 240 ss = 10nf C C d output start delay time r l = 10 ? ss = 10nf (note 7 ) C C pg power good delay time r l = 10 ? ss = 10nf C C
ap22800 document number: ds36046 rev. 3 - 2 5 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product electrical characteristics ( cont. @ t a = +25c, c in = 1f, c l = 100nf, unless otherwise specified . ) v in = 2.5 v symbol parameters conditions min typ max unit i in _ q input quiescent current v en = v in , i out = 0a C 11 19 a i in_sd input shutdown current v en = 0v, i out = 0a , r dis = 240 C 0.04 0.2 a r ds(on) load switch on - resistance v e n = v in , i out = ? 1 a C 19 24 m v ih_en en input logic high voltage C 1.0 C C v v i l _en en input logic low voltage C C C 0. 5 v i leak _en en input leakage v en = v in C C 0.1 a r d s_di s discharge fet on - resistance v en = 0v , i dis = 10ma C 6 9 v ol_pg power good output low level i ol_pg = 100a, v en = 0v C C 0.2 v i oz_pg power good high - impedance current v pg = v in , v e n = v in C C 0.05 a t rise output rise t ime r l = 10 ? , c ss = 10nf C 125 C s t on output turn - on delay time r l = 10 ? , c ss = 10nf C 95 C s t fall output fall time r l = open , r dis = 240, c ss = 10nf C 56 C s t off output turn - off delay time r l = open, r dis = 240 , c ss = 10nf C 21 C s t d output start delay time r l = 10 ? , c ss = 10nf (note 7 ) C 30 C s t pg power good delay time r l = 10 ? , c ss = 10nf C 310 C s v in = 1.8 v symbol parameters conditions min typ max unit i in _ q input quiescent current v en = v in , i out = 0a C in_sd input shutdown current v en = 0v, i out = 0a , r dis = 240 C ds(on) load switch on - resistance v e n = v in , i out = ? C m ih_en en input logic high voltage C C C i l _en en input logic low voltage C C C leak _en en input leakage v en = v in C C d s_di s discharge fet on - resistance v en = 0v , i dis = 10ma C ol_pg power good output low level i ol_pg = 100a, v en = 0v C C oz_pg power good high - impedance current v pg = v in , v e n = v in C C rise output rise t ime r l = 10 ? ss = 10nf C C on output turn - on delay time r l = 10 ? ss = 10nf C C fall output fall time r l = open , r dis = 240, ss = 10nf C C off output turn - off delay time r l = open, r dis = 240 ss = 10nf C C d output start delay time r l = 10 ? ss = 10nf (note 7 ) C C pg power good delay time r l = 10 ? ss = 10nf C C note: 7 . guaranteed by design
ap22800 document number: ds36046 rev. 3 - 2 6 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product test circuit and t on /t off waveforms 5 0 % 5 0 % 5 0 % 5 0 % v e n v o u t 5 0 % v p g 1 0 % 9 0 % 9 0 % 1 0 % v o u t t r i s e t f a l l t o f f t o n t d t p g
ap22800 document number: ds36046 rev. 3 - 2 7 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product performance characteristics (@ t a = +25c, v in = 5v, unless otherwise specified . ) r ds(on) vs. v in (i out =200ma) r ds(on) vs. ambient temperature (i out =200ma) input quiescent current vs. v in input shutdown current vs. v in turn on response time turn off response time (v in =5v, t a =+25 c , r l =10 ? , c ss =10nf, c l =1 f, c in =1 f) (v in =5v, t a =+25 c , r dis =1k ? , c ss =10nf, c l =1 f, c in =1 f)
ap22800 document number: ds36046 rev. 3 - 2 8 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product performance characteristics ( cont. @ t a = +25c, v in = 5v, unless otherwise specified . ) turn on response time turn off response time (v in = 1. 5v, r l =10 ? , c ss =10nf, c l =1 f, c in =1 f) (v in = 1. 5v, t a =+25 c , r dis =1k ? , c ss =10nf, c l =1 f, c in =1 f) t rise vs. v in t d vs. v in (t a =+25 c , r l =10 ? , c ss =10nf, c l =1 f, c in =1 f) (t a =+25 c , r l =10 ? , c ss =10nf, c l =1 f, c in =1 f) t fall vs. v in t fall vs. v in (t a =+25 c , r dis =1k ? , c ss =10nf, c l =1 f, c in =1 f) (t a =+25 c , r dis = 24 0 ? , c ss =10nf, c l = 0.1 f, c in =1 f)
ap22800 document number: ds36046 rev. 3 - 2 9 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product performance characteristics ( cont. @ t a = +25c, v in = 5v, unless otherwise specified . ) t on vs. v in t off vs. v in (t a =+25 c , r l =10 ? , c ss =10nf, c l =1 f, c in =1 f) (t a =+25 c , r dis = 1k ? , c ss =10nf, c l =1 f, c in =1 f) application information theory of operation the ap22800 is a load switch that can be used to isolate or power - down part of a system in order to reduce power consumption , particularly in battery - powered devices. the nmos pass element in the ap22800 is turned on when en pin is pulled high. this enables the internal charge pump, which then increases the voltage on the ss pin and provides an overdrive on the gate of the n - channel pass switch. when the voltage on the gate of the pass switch is around 1.6 times greater than vin, power is deemed to be good, and the power good ( pg ) output is pulled high via an external pull - up resistor. the rise - time of the switch is controlled by the value of the capacitor on the ss pin. when en is pulled low, the nmos pass switch turns off and isolates vout from vin. in addition, pg is pulled to ground to indicate that the power is no longer good. the dis pin keeps vout grounded wh ile en is low . the fall time on vout is largely controlled by the value of the discharge resistor and the capacit ance on the output . input and output voltage the input voltage (vin) should be between 1.5v and 5.5v. with the switch activated, t he output voltage (vout) will be the input voltage minus the voltage drop across the device. enable the gpio compatible en input allows the output current to be switched on and off. a high signal (switch on) should be at least 1v, and a low signal (switc h off) no higher than 0.5v. the en pin should not be left floating. it is advisable to hold en low when applying or removing power. p ower good the pg output is an open drain output that indicates when the pass switch is enhanced enough to deliver current to the load. when the gate voltage rises to vin 1.6, pg is pulled high via the external pull - up resistor . for example, if v in = 5v , then pg goes high when the gate voltage of the pass switch reaches 8v, thus, providing an overdrive of 3v . p g is pulled low w hen power is deemed not to be good . pg can be pulled up to any voltage to a maximum of 5.5v, although it is recommended to utilize vout with a resistor greater than 5 0k. the advantage of pulling up pg to vout is that when en is low, vout is also grounded. thus, no power is wasted in the pul l - up resistor. if this feature is not required, then pg pin can be left floating. input and output capacitors the input and output capacitors should be placed as close to vin and vout pins as possible. the output capacitor should not be greater than the input capacitor, otherwise, current may flow backwards through the device after turn off. typically, a 10f inpu t capacitor and a 1f output capacit or should be placed close to vin and vout pins.
ap22800 document number: ds36046 rev. 3 - 2 10 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product application information ( cont. ) for heavier loads, it is recommended that the vin and vout trace lengths be kept to a minimum. in addition, a bulk capacitor ( 10 f) may also be placed close to the vout pin. if using a bulk capacitor on vout, it is important to control the inrush current by choosing an appropriate soft - start time in order to minimize the droop on the input supply. adjustable slew rate/soft - start the ss pin allows the output ramp time of the switch to be controlled using an external capacitor (c ss ) . the capacitor voltage rises to approximately twice the value of vin. table 1 shows typical rise times ( in s ) associated with various timing capacitors at different vin values. output voltage rise time ( in s ) measured at + 25c u sing 0805 x7r 10% 25v c eramic c apacitors v in 1.8v 2.5v 3.3v 5.0v v ss c ss 3.5v 4.8v 6.4v 9.7v 470pf 6.9 7.0 7.1 7.3 1nf 12.0 12.1 12.3 14.3 10nf 120 127 135 145 47nf 626 636 652 692 100nf 1305 1320 1340 1420 470nf 6320 6400 6660 7020 1000nf 13400 13040 13120 13800 table 1. timing c apacitors and r ise t imes extra capacitance will allow further increase in rise time if desired. the timing capacitor should have a breakdown voltage o f at least 25v to allow for a high voltage on this pin. adjustable discharge when en goes low, vout is discharged to ground throu gh the discharge resistor (r dis ) . the discharge/fall time on vout is largely controlled by r dis and by the output capacitor. the data in table 2 shows typical fall times associated with various discharge resistors with c l = 1f, for different values of v in . 1206 250mw 1% discharge r esistor ( ? ) fall t ime ( in ms ) measured at + 25c , with c l = 1f, r l = open 1.8v 2.5v 3.3v 5v 100 0.25 0.26 0.26 0.27 470 1.07 1.09 1.12 1.18 1000 2.28 2.32 2.40 2.54 4700 10.42 10.65 10.90 11.50 10000 23.33 24.30 24.50 25.05 table 2. discharge r esistors and o utput v oltage f all t imes
ap22800 document number: ds36046 rev. 3 - 2 11 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product board layout and thermal considerations due to the high current capacity of the load switch, pcb layout needs to ensure good thermal distribution during operation. t he top and bottom of ap22800ev1, the evaluation board for the ap22800, can be seen below. figure 1 . pcb copper layout & silk screen C top figure 2 . pcb copper layout & silk screen C bottom thermal vias are used directly underneath the chip to help distribute the heat from the device. the ground plane on the under side of the board effectively acts as a large heatsink. the widths of the tracks carrying vin and vout are k ept wide. vias are also distributed around the board to aid thermal conduction and to ensure a consistent potential, particularly around the ground connections of the capacitors. al l capacitors used are located as close as possible to the ap22800 to minimi ze any parasitic effects. the maximum junction temperature of the ap22800 is + 125c. to ensure that this is not exceeded, the following equation can be used to give an approximation of junction temperature. temperature readings taken with a thermal camera can also give a good approximation of power dissipation with the use of this e quation. the board layout has a major influence on the parameter . w here , = junction temperature ( c) = ambient temperature ( c) = junction to ambient thermal impedance ( c/w) = power dissipation (voltage drop across device output current) (w)
ap22800 document number: ds36046 rev. 3 - 2 12 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product ordering information part number package code packaging 7 tape and reel ap 22800hb - 7 hb u - dfn2116 - 8 30 00/tape & reel - 7 marking information u - dfn2116 - 8 part number package identification code ap 22800hb - 7 u - dfn 2116 - 8 wa a p 2 2 8 0 0 x x - 7 p a c k i n g p a c k a g e h b : u - d f n 2 1 1 6 - 8 - 7 : t a p e & r e e l x x : i d e n t i f i c a t i o n c o d e ( t o p v i e w ) x : i n t e r n a l c o d e x y x x w y : y e a r : 0 ~ 9 w : w e e k : a ~ z : 1 ~ 2 6 w e e k ; a ~ z : 2 7 ~ 5 2 w e e k ; z r e p r e s e n t s 5 2 a n d 5 3 w e e k
ap22800 document number: ds36046 rev. 3 - 2 13 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 new product package outline dimensions (all d imensions in mm . ) please see ap02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. (1) package type: u - dfn2116 - 8 suggested pad layout please see ap02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. (1) package ty p e : u - dfn2116 - 8 u - dfn2116 - 8 dim min max typ a 0.545 0.605 0.575 a1 0.000 0.050 0.020 a3 - - 0.130 b 0.200 0.300 0.250 d 2.050 2.175 2.100 d2 1.600 1.800 1.700 e 1.550 1.675 1.600 e2 0.300 0.500 0.400 e - - 0.500 l 0.275 0.375 0.325 z - - 0.175 all dimensions in mm dimensions value (in mm) c 0.500 x 0.300 x1 1.750 x2 1.800 y 0.600 y1 0.450 y2 2.050 pin1 x2 x1 y1 y2 y c x d d2 e e b l e2 d2/2 e2/2 r0.100 z (0.600) c'0.2x45 (pin #1 id) a a1 a3 seating plane
ap22800 document number: ds36046 rev. 3 - 2 14 of 14 www.diodes.com january 2015 ? diodes incorporated ap22800 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 reserve the right to make modifications, enhancements, improvements, corrections or other c hanges without further notice to this document and any product described herein. diodes incorporated does not assume any liability 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 products 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 incorporated do es not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemni fy 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 applicat ion. 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. 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 sp ecifically 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 sys tems 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 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 effectiven ess. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety - related re quirements 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 ? 201 5 , diodes incorporated www.diodes.com

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