pin configurations 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. features z z z z z up to 200ma output current (each ldo) z z z z z dual shutdown pins control each output z z z z z 124 v rms low noise output z z z z z current limiting and thermal protection z z z z z short circuit protection z z z z z 120mv dropout at 100ma load z z z z z two ldos in sot-23-6 package z z z z z rohs compliant and 100% lead (pb)-free applications z cellular phones z laptop, notebook, and palmtop computers z battery-powered equipment z hand-held equipment z wireless lan (top view) sot-23-6 general description the rt9182 is a dual-channel, low noise, and low dropout regulator supplying up to 200ma current at each channel. the output voltage ranges from 1.5v to 3.3v in 100mv increments and 2% accuracy by operating from a +2.7v to +5.5v input. the rt9182 uses an internal pmos as the pass device, which consumes 165 a supply current (both ldos on) independent of load current and dropout conditions. the en1 and en2 pins control each output respectively. when both outputs shutdown simultaneously, the chip will be turn off and consumes nearly zero operation current which is suitable for battery-power devices. other features include a current limiting, and over temperature protection. 123 4 5 6 vout2 gnd en2 en1 vin vout1 note : there is no pin1 indicator on top mark for sot-23-6 type, and pin 1 will be lower left pin when reading top mark from left to right. rt9182 package type es : sot-23-6 operating temperature range p : pb free with commercial standard g : green (halogen free with commer- cial standard) output voltage a : 2.8v (output1), 2.8v (output2) b : 3.0v (output1), 3.0v (output2) c : 2.8v (output1), 3.0v (output2) d : 2.8v (output1), 2.5v (output2) e : 2.8v (output1), 1.8v (output2) f : 2.5v (output1), 2.5v (output2) g : 2.5v (output1), 1.8v (output2) h : 3.3v (output1), 2.5v (output2) i : 3.3v (output1), 1.8v (output2) j : 3.0v (output1), 2.5v (output2) k : 3.0v (output1), 1.8v (output2) l : 2.8v (output1), 1.85v (output2) rt9182 product specification 1 of 4 4008-318-123 sales@twtysemi.com http://www.twtysemi.com
functional pin description function block diagram pin no. pin name pin function 1 vout2 channel 2 output voltage 2 gnd common ground 3 en2 note chip enable (active high) 4 en1 note chip enable (active high) 5 vin supply input 6 vout1 channel 1 output voltage note: if en1 and en2 are both low, both regulators and the reference turn off. thermal protection current limit current limit v ref + - + - bias vin vout1 en1 en2 gnd vout2 typical application circuit en2 en1 vout2 vout1 rt9182 gnd vin 2.2uf v in 2.2uf v out1 2.2uf v out2 chip enable chip enable 3 6 5 4 1 2 rt9182 product specification 2 of 4 4008-318-123 sales@twtysemi.com http://www.twtysemi.com
absolute maximum rating s (note 1) z supply input v oltage ------------------------------------------------------------------------------------------------------ 6.5v z power dissipation, p d @ t a = 25 c sot-23-6 -------------------------------------------------------------------------------------------------------------------- 0.4w z package thermal resistance (note 5) sot-23-6 , ja --------------------------------------------------------------------------------------------------------------- 250 c/w z lead temperature (soldering, 10 sec.) ------------------------------------------------------------------------------- 260 c z storage temperature range -------------------------------------------------------------------------------------------- ? 65 c to 150 c z esd susceptibility (note 2) hbm (human body mode) ---------------------------------------------------------------------------------------------- 2kv mm (ma chine mode) ------------------------------------------------------------------------------------------------------ 200v electrical characteristics recommended operating conditions (note 3) z supply input v oltage ------------------------------------------------------------------------------------------------------ 2.7v to 5.5v z enable input voltage ------------------------------------------------------------------------------------------------------ 0v to 5.5v z junction temperature range -------------------------------------------------------------------------------------------- ? 40 c to 125 c parameter symbol test conditions min typ max units output voltage accuracy (load regulation) v out i l = 1ma to 200ma -2 -- +2 % maximum output current i max continuous 200 -- -- ma current limit i lim r load = 1 500 -- 1000 ma no load -- 165 260 a quiescent current i g i out = 100ma (both ldos) -- 165 260 a i out = 1ma -- 1.2 -- mv i out = 100ma -- 120 -- mv dropout voltage (note 4) v drop i out = 200ma -- 255 -- mv line regulation v line v in = (v out +0.4v or 2.7v) to 5.5v i out = 1ma -0.2 -- +0.2 %/v en input high threshold v ih v in = 2.7v to 5.5v 1.6 -- -- v en input low threshold v il v in = 2.7v to 5.5v -- -- 0.4 v en input bias current i sd en = gnd or v in -- -- 100 na shutdown supply current i gsd en1 = en2 = gnd -- 0.01 2 a thermal shutdown temperature t sd -- 140 -- c thermal shutdown hysteresis t sd -- 10 -- c output voltage noise e no 10hz to 100khz, c out = 4.7 f, i load = 1ma -- 124 -- v rms output voltage ac psrr 100hz, c out = 4.7 f, i load = 100ma -- 62 -- db (v in = 3.6v, c in = c out = 2.2 f, en1 = en2 = v in , typical values at t a = 25 c, for each ldo unless otherwise specified.) rt9182 product specification 3 of 4 4008-318-123 sales@twtysemi.com http://www.twtysemi.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 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. 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. rt9182 product specification 4 of 4 4008-318-123 sales@twtysemi.com http://www.twtysemi.com
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