FP5201 non - synchronous pwm b oost c ontroller this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 1 / 10 general description the FP5201 is a boost topology switching regulator for wide operating voltage applications. it provides built - in gate driver pin for driving the external n - mosfet . the internal compensation network minimizes external c omponent counts, and the non - inverting input of error amplifier connects to a 0.6v precision reference voltage. the FP5201 ha s internal soft start and shor t circuit protection function . the FP5201 is available in the small footprint so t23 - 6 l package to fit in space - saving pcb layout for miscellaneous application fields. features ? wide supply voltage operating range: 2.4 to 5.5v ? precision feedback ref er ence voltage : 0.6v (2%) ? shutdown current : < 1a ? internal fixed pwm frequency : 5 5 0khz ? internal soft start function :7ms (ss) ? short circuit protection function (scp) ? over voltage protection ? package: sot23 - 6l ? duty cycle: pwm/pfm switching control circuit (15%~90%) applications ? chargers ? lcd displays ? digital cameras ? handheld devices ? portable products typical application circuit f p 5 2 0 1 s c p f b e x t e n 2 3 g n d 4 6 5 v o u t v i n v c c 1 o n / o f f
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 2 / 10 function block diagram pin descriptions so t23 - 6 l name no. i / o description v cc 1 p ic power supply scp 2 i delay time setting pin for scp fb 3 i error a mplifier inverting input en 4 i enable control (active high) gnd 5 p ic ground ext 6 o external transistor connection pin p w m c o m p . e r r o r a m p . c o n t r o l a n d d r i v e r l o g i c o s c i l l a t o r e x t v c c e n u v l o s h u t d o w n c i r c u i t r y f b 0 . 6 v 5 5 0 k h z s o f t s t a r t g n d 2 a v r a m p s c p s c p 1 . 0 v v c c m a x . d u t y s c p 1 2 3 6 5 4 v c c e n f b a u 9 8 6 t o p v i e w g n d e x t
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 3 / 10 marking information sot23 - 6l lot number : w afer lot number s last two digits for example: 132386tb ? 86 year : production year s last digit part number code : part number identification code for this product. it should be always a u . l o t n u m b e r p a r t n u m b e r c o d e y e a r a u 9 8 6
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 4 / 10 order ing information part number code operating temperature package m oq description FP5201lr - g1 au - 25 c ~ 85 c sot23 - 6l 3000ea tape & reel absolute maximum ratings parameter symbol conditions min. typ. max. unit supply voltage v cc 0 5.5 v en,fb voltage 0 5.5 v power dissipation p d sot23 - 6l @t a =25 c 455 mw the rmal resistance (note1) ja sot23 - 6l +220 c / w junction temperature t j +150 c operating temperature t op - 25 +85 c storage temperature t st - 65 +150 c lead temperature (soldering, 10 sec) +260 c ir re - flow soldering curve
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 5 / 10 recommended operating conditions parameter symbol conditions min. typ. max. unit supply voltage v cc 2.4 5.5 v operating temperature range t a ambient temperature - 25 +85 c dc electrical characteristics ( v cc =3.3v, t a =25 c , unless otherwise specified ) parameter symbol conditions min. typ. max. unit system supply input input supply range v cc 2.4 5.5 v under voltage lockout v uvlo 2.1 v uvlo hysteresis 0.1 v quiescent current i cc fb=1.0v, no switch 70 a shutdown current i cc v en =gnd 0.1 a oscillator operation frequency f osc v fb = 0.6 v 5 5 0 k h z pfm switching duty ratio % 1 5 % maximum duty ratio % 90 % soft - start time t ss v in =5v 7 ms reference voltage feedback voltage v ref v in =5v 0.588 0.6 0.612 v enable control enable voltage v en 0. 96 v shutdown voltage v en 0. 6 v external transistor connection current ext pin output current i exth - 1 05 ma ext pin output current i extl 130 m a
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 6 / 10 function description operation the FP5201 is a voltage mode boost controller. the switching is a fixed frequency 5 5 0khz and operates with pulse width modulation (pwm). an internal resistive divider provides 0.6v reference for the error amplifier. the FP5201 changes to pfm mode when output is light load. it can increase efficiency, but pfm mode also i ncreases output voltage ripple . soft start function soft start circuitry is integrated into fp 5 201 to avoid inrush current during power on. after the ic is enabled, the output of error amplifier is clamped by the internal soft - start function, which causes pwm pulse width increasing slowly and thus reducing input surge current. short circuit protection when a heavy loading or short circuit condition makes output voltage dropping too much, the error amplifier output will rise to very high. that makes t he d uty cycle rise to maximum 90% and the short circuit protection function is triggered. external scp capacitor is charged ( 2a typ. ) until scp threshold voltage 1v, and then pre - driver will be turned off. the time of short circuit protection is: t scp (sec)=0.5c scp (f) shutdown function drive enable pin to ground to shut down the fp520 1 . shutdown mode forces to turn off all in ternal circuitry, and reduces the vin supply current to 0.1a (typ). the enable pin rising threshold is 0.96v (typ). before any operation begins, the voltage at en able pin must exceed 0.96v (typ ) .
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 7 / 10 application information inductor selection inductance v alue is decided based on different condition. 3.3uh to 4.7 h inductor value is recommended for general application circuit. there are three important inductor specifications, dc resistance, saturation current and core loss. low dc resistance has better pow er efficiency. capacitor selection the output capacitor is required to maintain the dc voltage during switching . low esr capacitors are preferred to reduce the output voltage ripple. ceramic capacitor of x5r and x7r are recommended, which have low equiv alent series resistance (esr) and wider operation temperature range. diode selection schottky diodes with fast recovery times and low forward voltages are recommended. ensure the diode average and peak current rating exceed the average output current and peak inductor current. in addition, the diodes reverse breakdown voltage must exceed the output voltage. output voltage programming the output voltage is set by a resistive voltage divider from the output voltage to fb. the output voltage is: layout considerations 1. the power traces, consisting of the gnd trace, the mos drain trace and the v cc trace should be kept short, direct and wide. 2. layout switching node mos drain, inductor and diode connection traces wide and short to red uce emi. 3. place c in near by v cc pin as closely as possible to maintain input voltage steady and filter out the pulsing input current. 4. the resistive divider r1 and r2 must be connected to fb pin directly and as closely as possible. 5. fb is a sensitive node. please keep it away from switching node, mos drain . 6. the gnd of the ic, c in and c out should be connected close together and directly to a ground plane. ? ? ? ? ? ? ? ? 2 r 1 r 1 v 6 . 0 v out
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 8 / 10 suggested layout l 1 c 1 c 2 r 2 r 1 d 1 c 3 v o u t v i n g n d v i a t o g n d v i a t o v i n f p 5 2 0 1 q 1 c 4 1 6 5 2 3 4
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 9 / 10 application information note: 1. c1 and c3 cho o se ceramic capacitor of x5r or x7r . 2. r3 and c5 are added for reducing emi (electromagnetic interference) . f p 5 2 0 1 s c p f b e x t e n 2 3 g n d 4 6 5 v o u t 5 v / 2 . 1 a v i n 3 v ~ 4 . 2 v v c c 1 c 1 2 2 f c 3 2 2 f * 2 d 1 s m 5 4 0 a r 1 8 8 k r 2 1 2 k q 1 l 1 3 . 3 h s o t 2 3 - 6 l o n / o f f c 4 0 . 1 f r 3 c 5 o p t i o n a l f p 5 2 0 1 s c p f b e x t e n 2 3 g n d 4 6 5 v o u t 5 v / 3 a v i n 3 v ~ 4 . 2 v v c c 1 c 1 2 2 f c 3 2 2 f * 2 d 1 s m 5 4 0 a * 2 r 1 8 8 k r 2 1 2 k q 1 l 1 3 . 3 h s o t 2 3 - 6 l o n / o f f c 4 0 . 1 f r 3 c 5 o p t i o n a l c 2 1 0 0 f
FP5201 this datasheet contains new product information. feeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling - tech.com.tw rev. 0. 6 2 10 / 10 package outline sot23 - 6l u nit: mm note: 1. package dimensions are in compliance with jedec outline: m o - 178 ab. 2. dimension d does not include molding flash , protrusions or gate burrs. 3. dimension e1 does not include inter - lead flash or protrusions. symbols min. (mm) max. (mm) a 1.050 1.450 a1 0.050 0.150 a2 0.900 1.300 b 0.300 0.500 c 0.080 0.220 d 2.900 bsc e 2.800 bsc e1 1.600 bsc e 0.950 bsc e1 1.900 bsc l 0.300 0.600 l1 0.600 ref l2 0.250 bsc ? 0 8 1 3 7 2 6 15
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