View MP5073_9047616.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

mp 5073 5.5 v, 2a low r dson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 1 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. description the MP5073 provides up to 2a load protection over a 0.5v to 5.5v voltage range . with the small r dson in tiny package, MP5073 is a very high effici ency and space saving solution for notebooks, tablets, and other portable/battery - operated applica tions . with the soft start function, the MP5073 can avoid inrush current during circuit start up. MP5073 also provides programmable soft start time , output discharge functions, ocp and thermal shutdown features. the max load at the output (source) is curr ent limited. this is accomplished by utilizing a sense fet topology. the magnitude of the current limit is controlled by an external resistor from the ilim pin to ground. an internal charge pump drives the gate of the power device, allowing a very low on - resistance dmos power fet of just 5 0m. the MP5073 is available in a tiny 12 - pin 2mmx2mm qfn package. features ? integrated 5 0 m? low rdson fets ? adjustable start up slew rate ? wide vin range from 0.5v to 5.5v ? <1 a shutdown current ? typical 2 a current limit range ? power good indicator ? output dis charge function ? enable pin ? <200ns s hort - c ircuit protection response time ? thermal protection ? small qfn - 12 ( 2mmx2mm ) package for space saving applications ? notebook and tablet computers ? portable devices ? solid state drives ? handheld devices all mps parts are le ad - free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. mps and the future of analog ic technology are registered trademarks of monolithic power systems, inc. typical applicatio n
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 2 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. order ing information part number* package top marking MP5073 gg qfn - 12 (2mmx2mm) s ee blow * f or tape & reel, add suffix C z ( e. g. MP5073gg C z) ; top marking cb : product code of MP5073 g g ; y: year code; lll: lot number; package reference top view qfn - 12 ( 2mmx2mm )
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 3 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. absolute maximum rat ings (1) v in ................................ .............. C 0.3v to +6.5v v cc ................................ ............. C 0.3v to +6.5v v out ................................ ........... C 0.3v to +6.5v en, ss, ilim ........................ C 0.3v to vcc+0.3 v junction temperature .............................. 150 c lead temperature ................................ ... 260 c continuous power dissipation (2) qfn - 12 (2mmx2mm) ................................ . 1.6w recommended operating conditions ( 3 ) supply voltage v in ......................... 0.5v to 5.5v supply voltage v cc ............................ 3v to 5.5v output voltage v out ....................... 0.5v to 5.5v operating junction temp. ........ - 40c to +125c thermal resistance ( 4 ) ja jc qfn - 12 (2mmx2mm) .. ..80 16 c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), t he junction - to - ambient thermal resistance ja , and the amb ient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calc ulated by p d (max) = (t j (max) - t a )/ ja . exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51 - 7, 4 - layer pcb.
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 4 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. electrical character istics v in = 3 .6 v, v cc = 3.6 v, t a = 25c , unless otherwise noted. parameters symbol condition min typ max units input and supply voltage range input voltage v in 0.5 5.5 v supply voltage v cc 3 5.5 v supply current off state leakage current i off v in = 5 v, e n =0 1 a v cc standby current i stby v cc =5v, en=0 0.1 1 a v cc =5v, enable, no load 180 23 0 power fet on resistance r ds on - 7 v cc =5.0v 50 m v cc =3.3v 60 thermal shutdown and recovery shutdown temperature (5) t s t d 1 50 c hysteresis (5) t hys 3 0 c under voltage protection v cc under voltage lockout threshold v cc _ uvlo uvlo rising threshold 2.6 2.8 v uvlo hysteresis v uvlo hys 200 m v soft start s s pull - up current i ss fixed slew rate 11 a enable en rising threshold v enh 1.3 1.5 1.7 v en hysteresis v enl 200 m v ilim current limit i out r limit =23.8k .ramp l out record peak current limit value 1.3 1.4 1.5 a discharge resistance discharge resistance r dis 200 pg power good rising threshold v pg _ r voltage gap between v out and v in 140 280 450 mv power good hysteresis v pg _ vhys 60 mv power good delay t pg _d 50 s power good high v pg _ h v cc =3.3v 3.2 v power good low v pg _ l sink 1ma 0. 3 v notes: 5) guarantee by characterization - not production tested .
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 5 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. pin function s qfn12 ( 2x2 ) pin # name description 1 en enable input. pulling this pin below the specified threshold shuts the chip down . 2 gnd ground. 3 vcc supply voltage to the control circuitry. 4 ilim output current limit configure. place a resistor to ground to set the overload current limit level. 5 ss soft start pin. an external capacitor connected to this pin sets the slew rate of the output voltage soft start period. 6 , 11, expose d pad vin input power supply. 9 vout output to the load. 12 pg power good pin. push - pull output. 7, 8, 10 nc nc pin, suggest connecting them with vout to im p rove the thermal performance and be compatible with mp5087 and mp5077.
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 6 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. typical performance characteristics v in = 3.6 v, v cc = 3.6v, en = 2.5v, r lim it = 13k, t a = 25c , unless otherwise noted.
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 7 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. typical performance characteristics (continued) v in = 3.6 v , v cc = 3.6v, en=2.5v, r lim it =13k, t a = 25c , unless otherwise noted.
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 8 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. typical performance characteristics (continued) v in = 3.6 v, v cc = 3.6v, en=4 v, r lim it =13k, t a = 25c , unless otherwise noted.
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 9 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. typical performance characteristics (continued) v in = 5v , v cc = 3.6v, en=4 v, r lim it =13k, t a = 25c , unless otherwise noted.
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 10 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. figure 1 : functional block diagram v o u t s s g n d v c c e n i l i m v i n 1 1 a c o n t r o l l o g i c c h a n g e p u m p c u r r e n t s e n s e u v l o p g v c c c u r r e n t l i m i t a m p 4 a f a s t o f f c o m p 1 v s o f t s t a r t v c c 4 a 8 a 8 0 k t h e r m a l s e n s e v o u t v i n
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 11 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. operation the MP5073 is designed to limit the in - rush current to the load when a circuit card is inserted into a live backplane power source , thereby limiting the backplanes voltage drop and the slew rate of the voltage to the load. it provides an integrated solution to monitor the input voltage, output voltage and output current to eliminate the need for an external current power mosfet, and current switch device. enable when input voltage is greater than the under - voltage lockout threshold (uvlo), typically 0.5v, MP5073 can be enabled by pulling en pin to higher than 1.5v. pulling down to groun d will disable MP5073. current limit the MP5073 provides a constant current limit that can be programmed by an external resistor. once the device reaches its current limit threshold, the internal circuit regulates the gate voltage to hold the current in t he power fet constant. the typical response time is about 20s and the output current may have a small overshoot during this time period. the pre - set current limit value can be calculated by below equation: i limit = (1 r limit ) s (1) s is the current sense ratio of MP5073, and this value is typically 33000 in v in = vcc= 3.6v . the s is almost a constant value when vin is changing from 1.2v to 5.5v, and when vin is smaller than 1.2v, a step change will come to s value, the value will change from 33000 to about 28000 . meanwhile, when vcc is changing, there is a lso a little shift on s value, for more information, please refer the curve s in ty pical performance characteristics . if the current limit block starts to regulate the output curre nt, t he power loss on power mosfet will cause the ic temperature rise. if the junction temperature rose to high enough, it will trigger thermal shutdown. after thermal shutdown happened, it will disable the output until the over temperature fault remove. t he over temperature threshold is 1 5 0 and hysteresis is 30 . power - good function the pg pin is the push pull of a mosfet that can be pulled high to v cc . the mosfet turns on with the application of an input voltage so that the pg pin is pulled to gnd. after the voltage gap between v in and v ou t is smaller than 280mv, the pg pin is pulled high after a 50s delay. when the voltage gap is higher than 340mv, the pg pin will be pulled low. short - circuit protection if the load current increases rapidly due to a short circuit, the current may exceed t he current limit threshold by a lot before the control loop can respond. if the current reaches an internal secondary current limit level (typical 7a), a fast turn - off circuit activates to turn off the power fet. this limits the peak current through the sw itch to limit the input voltage drop. the total short circuit response time is about 200ns. if fast off works, it wi ll keep off the power fet for 80s. after that time p eriod, it will re - turn on power fet, if the part is still i n short - circuit condition. mp507 3 will reduce the current limit, and hold it until the part is so hot and thermal shutdown. after the short - circ uit condition removed, the current limit will recover to the pre - set value automatically. output discharge MP5073 has output discharge function. this function can discharge the v out by internal pull down resistance when ic disabled and the load is very lig ht. soft - start a capacitor connected to the ss pin determines the soft - start time. there is an internal 1 1 a constant current source charge ss cap and ramps up the voltage on the ss pin. the output voltage rises at 5 times the slew rate to ss voltage. the soft - start time can be calculated by below equation: (2) out ss ss ss v (v) c (nf) 1 t (ms) 5 i ( a) ? ?? ?
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 12 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. t ss is the soft - start time , i ss is internal 11 a constant current, c ss is external soft - start cap. the suggestion minimum ss cap should be bigger than 4.7 nf . if the ss pin is floated or ss cap is too small, the v out rising time will be just limited by power mos charge time .
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 13 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. application informat ion ilim r esistor s election the current limit value can be set by ilim resistor. the current limit can be gotten by equation ( 1). the current limit threshold is suggested to 1 0 % ~ 2 0 % higher than maximum load current. for example, if the systems full load is 2 a, set the current limit to 2.2 a. s oft s tart c apacitor s election there is an internal 1 1 a constant current source charge ss cap and ramps up the voltage on the ss pin. the output voltage rises follow the 5 times the slew rate of ss voltage. if the inrush on output current reached the current limit during start up (like with large output cap or very large load), MP5073 will limit the output current and the same time, ss time will be increased (fig ure 2 and fig ure 3). figure 2 : soft start periods at d ifferent l oad figure 3 : soft start periods at d ifferent o utput c apacitance design example some d esign example and are provided below table 1 v in (v) current limit (a) rlimit (k ) ss cap (nf) ss time (ms) 3.6 0.5 47 22 1 3.6 1 27.4 47 2.4 3.6 2 15 100 5.4 soft start @ different load v out soft start @ no load soft start @ half load i in v out i in v out i in soft start @ very large load current limit current limit current limit soft start @ different output capacitance v out soft start @ small capacitance soft start @ large capacitance i in v out i in v out i in soft start @ very large capacitance current limit current limit current limit
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 14 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. layout guide pcb layout is very important to achieve stable operation. please follow these guidelines and take below figure for reference. place r limit close to i lim pin, i nput cap close to v cc pin. put enough vias around ic to achieve better thermal performance. f igure 4: recommended lay out gnd vin vin vout gnd c 1 c 2 c 3 c 4 c 5 c 6 r 1 gnd gnd vin en gnd ilim vcc pg
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit MP5073 rev. 1. 2 www.monolithicpower.com 15 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all r ights reserved. typical application circuits
MP5073 C 5.5v, 2a lo w rdson load switch with programmable current limit notice: the information in this document is subject to change without notice. please contact mps for current specifications. users should warrant and guarantee t hat third party intellectual property rights are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP5073 rev. 1. 2 www.monolithicpower.com 16 7/12/2017 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. package information qfn - 12 ( 2 mm x2 mm ) package outline drawing for 12 l qfn ( 2 x 2 mm ) mf - po - d - 0164 revision 0 . 0 side view bottom view note : 1 ) all dimensions are in millimeters . 2 ) exposed paddle size does not include mold flash . 3 ) lead coplanarity shall be 0 . 10 millimeters max . 4 ) jedec reference is mo - 229 . 5 ) drawing is not to scale . pin 1 id marking top view pin 1 id index area recommended land pattern pin 1 id see detail a pin 1 id option a 0 . 20 x 45 typ . pin 1 id option b r 0 . 20 typ . detail a

▲Up To Search▲

Price & Availability of MP5073

	To Download MP5073 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .