RT9187 1 ds9187-09 april 2008 www.richtek.com pin configurations applications cdma/gsm cellular handsets battery-powered equipment laptop, palmtops, notebook computers hand-held instruments mini pci & pci-express cards pcmcia & new cards portable information appliances 1a, ultra-low dropout, ultra-fast cmos ldo regulator ordering information marking information for marking information, contact our sales representative directly or through a richtek distributor located in your area, otherwise visit our website for detail. general description the RT9187 is a high-performance, 1a ldo regulator, offering extremely high psrr and ultra-low dropout. ideal for portable rf and wireless applications with demanding performance and space requirements. a noise reduction pin is also available for further reduction of output noise. regulator ground current increases only slightly in dropout, further prolonging the battery life. the RT9187 also works with low-esr ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. the RT9187 consumes less than 0.1ua in shutdown mode and has fast turn-on time less than 40 s. the other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. available in the vdfn-8l 3x3 and sop-8 (exposed pad) package. (top view) vdfn-8l 3x3 features ultra-low-noise for rf application ultra-fast response in line/load transient quick s tart-up (typically 40 s) < 0.1ua standby current when shutdown low dropout : 240mv at 1a wide operating voltage ranges : 2.5v to 5.5v ttl-logic-controlled shutdown input current limiting protection thermal shutdown protection only 2.2uf output capacitor required for stability high power supply rejection ratio rohs compliant and 100% lead (pb)-free vin vout vout vin en bp/adj nc gnd 7 6 5 1 2 3 4 8 9 note : richtek pb-free and green products are : ` rohs compliant and compatible with the current require- ments of ipc/jedec j-std-020. ` suitable for use in snpb or pb-free soldering processes. ` 100% matte tin (sn) plating. sop-8 (exposed pad) vin vin vout vout en nc bp/adj gnd gnd 2 3 4 5 6 7 8 9 RT9187( package type qv : vdfn-8l 3x3 (v-type) sp : sop-8 (exposed pad-option 1) operating temperature range p : pb free with commercial standard g : green (halogen free with commer- cial standard) - ) none : adjustable output fixed output voltage code 10 : 1.0v 11 : 1.1v : 32 : 3.2v 33 : 3.3v 1l : 1.34v
RT9187 2 ds9187-09 april 2008 www.richtek.com typical application circuit function pin description figure 2. adjustable operation figure 1. fixed operation note: the value of r2 should be less than 80k to maintain regulation. pin no. fixed output voltage adjustable output voltage pin name pin function 1 1 vin supply input. 2 2 vin supply input. 3 3 vout regulator output. 4 4 vout regulator output. 5 -- bp n oise r eduction. connecting a 10nf capacitor to gnd to reduce output noise. -- 5 adj if external feedback resistors are applied, the output voltage will be: v out = 0 .8 (1+ ) volts 6 6 gnd ground 7 7 nc no internal c onnection. 8 8 en enable input logic, active high. w hen the en goes to a logic low, the device is in shutdown mode. exposed pa d (9) nc no internal c onnection. the exposed pad must be soldered to a large pcb and connected to gnd for maximum power dissipation. 2 1 r r 2 1 r r 1 + v out = 0.8 x ( ) volts vin gnd vout RT9187 c out 2.2uf 2.2uf bp 10nf en c in c bp v in v out chip enable vin gnd vout RT9187 c out 2.2uf 2.2uf adj en c in v in v out r1 r2 chip enable
RT9187 3 ds9187-09 april 2008 www.richtek.com function block diagram + - v ref quick start en otp por bias current limit en vin vout bp gnd fixed + - v ref quick start en otp por bias current limit en vin vout adj gnd adjustable
RT9187 4 ds9187-09 april 2008 www.richtek.com absolute maximum ratings (note 1) supply input v oltage -------------------------------------------------------------------------------------------------- 6v en input voltage ------------------------------------------------------------------------------------------------------- 6v power dissipation, p d @ t a = 25 c vdfn-8l 3x3 ----------------------------------------------------------------------------------------------------------- 0.923w sop-8 (exposed pad) ----------------------------------------------------------------------------------------------- 1.33w package thermal resistance (note 9) vdfn-8l 3x3, jc ----------------------------------------------------------------------------------------------------- 8.2 c/w vdfn-8l 3x3, ja ------------------------------------------------------------------------------------------------------ 108 c/w sop-8 (exposed pad), jc ----------------------------------------------------------------------------------------- 15 c/w sop-8 (exposed pad)-8, ja --------------------------------------------------------------------------------------- 75 c/w lead temperature (soldering, 10 se c.) --------------------------------------------------------------------------- 260 c junction temperature ------------------------------------------------------------------------------------------------- 150 c storage temperature range ---------------------------------------------------------------------------------------- ? 65 c to 150 c esd susceptibility (note 2) hbm ---------------------------------------------------------------------------------------------------------------------- 2kv mm ------------------------------------------------------------------------------------------------------------------------ 200v recommended operating conditions (note 3) supply input voltage -------------------------------------------------------------------------------------------------- 2.5v to 5 .5v en input voltage ------------------------------------------------------------------------------------------------------- 0v to 5. 5v junction temperature range ---------------------------------------------------------------------------------------- ? 40 c to 125 c ambient temperature range ---------------------------------------------------------------------------------------- ? 40 c to 85 c electrical characteristics parameter symbol test conditions min typ max units output voltage accuracy (fixed output voltage) v out i out = 1 0ma ? 2 0 +2 % output voltage r ange (adjustable) v out_adj 0.8 -- 4.5 v quiescent current (note 6) i q v en v ih , i out = 0ma -- 380 500 a standby current (note 7) i stby v en v il ,v in = 3.3v -- 0.1 1 a current limit i lim r lo ad = 0.5 , v in = 3.3v 2 2.8 3 a dropout voltage (note 4) v dr op i out = 0.25a (n ote 8) -- 60 100 mv i out = 0.5a -- 120 180 i out = 1.0a -- 240 360 load regulation (note 5) (fixed output voltage) v load v in = (v out + 0.5v) 10ma < i out < 1.0a -- 0.4 -- %/a en threshold logic-low voltage v il v in = 3.3v -- -- 0.6 v logic-high voltage v ih v in = 3.3v 1.8 -- -- enable pin current i en v in = 3.3v, enable -- 0.1 1 a to be continued (v in = v out + 1v, v en = v in , c in = c out = 2.2 f (ceramic) & c bp = 10n f, t a = 25 c unless otherwise specified)
RT9187 5 ds9187-09 april 2008 www.richtek.com note 1. stresses listed as the above ? absolute maximum ratings ? may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. note 2. devices are esd sensitive. handling precaution is recommended. note 3. the device is not guaranteed to function outside its operating conditions. note 4. the dropout voltage is defined as v in -v out , which is measured when v out is v out(normal) - 100mv. note 5. regulation is measured at constant junction temperature by using a 2ms current pulse. devices are tested for load regulation in the load range from 10ma to 1.0a. note 6. quiescent, or ground current, is the difference between input and output currents. it is defined by i q = i in - i out under no load condition (i out = 0ma). the total current drawn from the supply is the sum of the load current plus the ground pin current. note 7. standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown signal (v en >1.8v ). note 8. performance at -5 c t a 85 c is assured by design. note 9. ja is measured in the natural convection at t a = 25 c on a low effective thermal conductivity test board of jedec 51-3 thermal measurement standard. parameter symbol test conditions min typ max units po wer supp ly rejection rate f = 100hz psrr i out = 3 00m a -- ? 60 -- db f = 10khz -- ? 50 -- line r egulation v line v in = (v out +0.5) to 5.5v, i out = 1ma -- -- 0.3 % start-up time t start_up r lo ad = 3 , 1nf c bp 0.1 f -- 40 -- s thermal shutdown temperature t sd -- 170 -- c thermal shutdown hysteresis t sd -- 30 -- adj reference voltage tolerance v ref 0.784 0.8 0.816 v adj pin current i adj v adj = v ref -- 10 100 na
RT9187 6 ds9187-09 april 2008 www.richtek.com typical operating characteristics (c out = 2.2 f/x5r, c bp = 10nf, unless otherwise specified ) current limit time (1ms/div) output current (a) v in = 3.3v 4 5 1 2 0 3 quiescent current vs. temperature 0 100 200 300 400 500 -50 -25 0 25 50 75 100 125 temperature quiescent current (ua) v in = 3.3v ( c) -40 dropout voltage vs. load current 0 50 100 150 200 250 300 0.0 0.2 0.4 0.6 0.8 1.0 load current (a) dropout voltage (mv) t j = 25 c t j = 125 c t j = -40 c v out = 2.8v quiescent current vs. input voltage 0 100 200 300 400 500 33.544.555.5 input voltage (v) quiescent current (ua) v in = 3.3v output voltage (v) en pin voltage (v) time (100us/div) en pin shutdown response v in = 3.3v, i load : 560ma 5 10 2 4 0 0 start up output voltage (v) en pin voltage (v) time (25us/div) v in = 3.3v i load : 560ma 2 4 1 2 0 0
RT9187 7 ds9187-09 april 2008 www.richtek.com load transient response time (100us/div) output voltage deviation (mv) load current (a) v in = 3.3v, i load : 50ma to 800ma (1a/div) (50mv/div) 0 1 0 50 -50 line transient response time (500us/div) input voltage deviation (v) output voltage deviation (mv) v in = 3.3v to 4.3v, i load : 1a 3.3 4.3 0 100 -100 load transient response time (100us/div) output voltage deviation (mv) load current (a) v in = 3.3v, i load : 50ma to 1a 0 1 0 100 -100 line transient response time (500us/div) input voltage deviation (v) output voltage deviation (mv) v in = 3.3v to 4.3v, i load : 800ma 3.3 4.3 0 10 -10 psrr -80 -60 -40 -20 0 20 0.0 0.1 1.0 10.0 100.0 1000.0 10000.0 frequency (hz) psrr (db) v in = v en = 3.8v 10 100 1k 10k 100k 1m 10m i load = 10ma i load = 280ma region of stable c out esr vs. load current 0.001 0.01 0.1 1 10 100 0 0.2 0.4 0.6 0.8 1 load current (a) region of stable c out esr ( ? ) v in = 3.3v v in = 6.0v unstable range simulation verify stable range region of stable c out esr ( )
RT9187 8 ds9187-09 april 2008 www.richtek.com outline dimension dimensions in millimeters dimensions in inches symbol min max min max a 0.800 1.000 0.031 0.039 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 d 2.950 3.050 0.116 0.120 d2 2.100 2.350 0.083 0.093 e 2.950 3.050 0.116 0.120 e2 1.350 1.600 0.053 0.063 e 0.650 0.026 l 0.425 0.525 0.017 0.021 v-type 8l dfn 3x3 package 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options d 1 e a3 a a1 d2 e2 l b e see detail a
RT9187 9 ds9187-09 april 2008 www.richtek.com richtek technology corporation headquarter 5f, no. 20, taiyuen street, chupei city hsinchu, taiwan, r.o.c. tel: (8863)5526789 fax: (8863)5526611 richtek technology corporation taipei office (marketing) 8f, no. 137, lane 235, paochiao road, hsintien city taipei county, taiwan, r.o.c. tel: (8862)89191466 fax: (8862)89191465 email: marketing@richtek.com a b j f h m c d i y x exposed thermal pad (bottom of package) 8-lead sop (exposed pad) plastic package symbol dimensions in millimeters dimensions in inches min max min max a 4.801 5.004 0.189 0.197 b 3.810 4.000 0.150 0.157 c 1.346 1.753 0.053 0.069 d 0.330 0.510 0.013 0.020 f 1.194 1.346 0.047 0.053 h 0.170 0.254 0.007 0.010 i 0.000 0.152 0.000 0.006 j 5.791 6.200 0.228 0.244 m 0.406 1.270 0.016 0.050 option 1 x 2.000 2.300 0.079 0.091 y 2.000 2.300 0.079 0.091 option 2 x 2.100 2.500 0.083 0.098 y 3.000 3.500 0.118 0.138
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