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mp6401 300ma ldo linear regulator with integrated reset circuit mp6401 rev. 1.0 www.monolithicpower.com 1 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. the future of analog ic technology description the mp6401 combines a low-dropout linear regulator with an integrated reset circuit. it operates from a 2.5v to 5.5v input voltage and regulates the output voltage with 2% accuracy at 1.8v, 2.5v, 3.3v or adjustable value. it delivers up to 300ma of load current. by combining an ldo linear regulator with a reset circuit, these products can reduce cost and save space in compact portable devices such as cell phones, smart phones, pdas, pmps, and portable gps devices. the mp6401 provides a push-pull, active-low that asserts when the regulator output voltage drops below the microprocessor supply threshold (-7.5% or -12.5% of nominal output voltage). four reset delay time, 3.125ms, 25ms, 200ms and 1580ms can be selected. the mp6401 is available in 3mmx3mm tqfn8, 2mmx2mm tqfn6 and tsot packages and is specified for operation from -40 c to 85 c. features ? low quiescent current of 80 a for battery powered equipment ? low 114mv dropout at 300ma output ? 2 accurate output voltage ? fixed output voltage options of 1.8v, 2.5v or 3.3v ? adjustable output voltage from 1.229v to 5v using an external resistor divider ? 15 v rms ultra low noise output ? psrr: 57db at 1khz ? input reverse current, thermal and short-circuit protection ? microprocessor reset with four delay time options ? push-pull reset applications ? smart phone and cell phone ? portable gps devices ? wireless devices ? pda and pmp all mps parts are lead-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 monolithi c power systems, inc. typical application 2.5v to 5.5v in out adj en reset gnd gnd up mp6401 r1 c out c in v i/o reset
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 2 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. ordering information part number * package top marking free air temperature (t a ) mp6401dqt-18ad3 7t mp6401dqt-18bd3 8t mp6401dqt-25ad3 5t mp6401dqt-25bd3 6t mp6401dqt-33bd3 tqfn8 (3mmx3mm) 4t mp6401dgt-18ad3 7t mp6401dgt-18bd3 8t mp6401dgt-25ad3 5t mp6401dgt-25bd3 6t mp6401dgt-33bd3 tqfn6 (2mmx2mm) 4t mp6401dj-18ad3 7t mp6401dj-18bd3 8t mp6401dj-25ad3 5t MP6401DJ-25BD3 6t mp6401dj-33bd3 tsot23-6 4t ?40c to +85c * for other versions, contac t factory for availability. note: mp6401dqt dg dj output voltage (table 1) temperature package reset threshold accuracy (table 2) reset delay time (table 3) } _ _ _ d _ -lfz table 1?output voltage suffix guide suffix output voltage 18 1.8 25 2.5 33 3.3 table 2?reset threshold accuracy suffix vout reset threshold (%) a -7.5% b -12.5% table 3?reset delay time guide suffix typical reset delay time (ms) d1 3.125 d2 25 d3 200 d4 1580
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 3 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. package reference top view in in gnd en 1 2 3 4 out out adj reset 8 7 6 5 top view in gnd en 1 2 3 out adj reset 6 5 4 en gnd in 1 2 3 6 5 4 reset adj out top view tqfn8 (3mm x 3mm) tqfn6 (2mm x 2mm) tsot23-6 absolute maxi mum ratings (1) in, en, out.................................?0.3v to + 6 v adj ..................................................?0.3v to 6v reset .............................................?0.3v to 6v continuous power dissipation . (t a = +25c) (2) tqfn8 (3mm x 3mm) .............................. 2.6w tqfn6 (2mm x 2mm) ............................ 1.56w tsot ....................................................... 0.57w junction temperature ...............................150 c lead temperature ....................................260 c storage temperature.............. ?65 c to +150 c recommended operating conditions (3) supply voltage v in ..........................2.5v to 5.5v operating junct. temp (t j )..... ?40 c to +125 c thermal resistance (4) ja jc tqfn8 (3mm x 3mm) ...........48 ...... 11 ... c/w tqfn6 (2mm x 2mm) ...........80 ...... 16 ... c/w tsot .....................................220 .... 110 .. 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), the junction-to-ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous powe r dissipation at any ambient temperature is calculated 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. thermal shutdown engages at t j =150 o c(typ) and disengages at t j =130 o c(typ) 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7 4-layer board.
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 4 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. electrical characteristics v in = (v out + 0.5v) or +2.5v, whichever is greater, c out = 3.3f. typical value at t a = +25c unless otherwise noted. parameter symbol condition min typ max unit input supply range v in 2.5 5.5 v input undervoltage lockout v uvlo v in falling 1.85 2.05 2.2 v hysteresis of uvlo v hys 190 mv supply current (ground current) i q i out = 0 80 155 a shutdown supply current i shdn t a =+25c 0.1 1 a regulation circuit output current 300 ma output voltage accuracy (fixed output voltage) 1ma i out 300ma -2 +2 % adjustable output voltage range v adj 5 v adj reference voltage v adj 1.205 1.229 1.253 v adj threshold 250 mv adj input leakage current i adj v adj = 0, +1.2v 20 100 na dropout voltage (fixed output voltage) (5) ? v do v out = +3.3v, i out = 300ma 114 220 mv short current limit v in 2.5v 375 ma in regulation current limit v in 2.5v 500 ma input reverse leakage current (out to in leakage current) v in = 4v, v out = 5v, en deasserted, t a =+25c 0.01 1 a en input low voltage v il 0.3v in v en input high voltage v ih 0.7vin v en input current en= v in or gnd, t a =+25c -1 0.1 +1 a thermal-shutdown temperature t shdn 150 c thermal-shutdown hysteresis ? t shdn 20 c line regulation v out =1.5v, 2.5v v in 5.5v, i out = 10ma 0.02 %/v load regulation v out = 1.5v, v in = 2.5v, 1ma iout 150ma 0.1 % output voltage noise 10hz to 100khz, c in = 0.1f, i out = 100ma,v out = 1.5v 15 v rms reset circuit mp6401_ _ - _ _ ad_ 90 92.5 95 v out reset threshold v thout mp6401_ _ - _ _ bd_ 85 87.5 90 % v out v out to reset delay 30 s d1 2.2 3.125 4.0 d2 17.5 25 32.5 d3 140 200 260 reset delay time t d d4 1106 1580 2054 ms
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 5 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. electrical characteristics (continued) v in = (v out + 0.5v) or +2.5v, whichever is greater, c out = 3.3f. typical value at t a = +25c unless otherwise noted. parameter symbol condition min typ max unit v out 1.0v, i sink = 50a, reset asserted 0.3 v ol v out 1.5v, i sink = 3.2ma, reset asserted 0.4 reset output voltage push-pull v oh v out 2.0v, i source = 500a, reset deasserted 0.8v out v notes: 5) dropout voltage is defined as the input to output different ial when the output voltage drops 100mv below its nominal value.
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 6 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. pin functions tqfn8 pin # tqfn6 pin# tsot pin# name description 1 2 1 3 in supply input pin. 3 2 2 gnd ground. 4 3 1 en enable (active high). connect en to in generally. don?t float en pin. 5 4 6 reset push-pull reset . it asserts when the out voltage drops below its threshold. when out voltage recover, reset deasserts after a fix delay time (four options). 6 5 5 adj mode selector input. when adj is connect ed to the tap of an external resistor divider from the out to gnd, the ou t voltage is adjustable. when adj is connected to gnd, a preset output voltage is selected. 7 8 6 4 out regulator output pin.
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 7 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. typical performanc e characteristics v in =5v, v out =3.3v, c out =3.3f, t a = -40c to +85c, typical values are at t a =+25c, unless otherwise noted. supply current vs. input votage adj=gnd, i out =300ma 340 370 400 430 460 3.8 4.2 4.6 5 5.4 input voltage (v) input voltage (v) input voltage (v) input voltage (v) supply current vs. input votage adj=gnd, i out =0 40 55 70 85 100 3.8 4.2 4.6 5 5.4 supply current vs. input votage v o =1.5v, i out =300ma 340 370 400 430 460 2.5 3.5 4.5 5.5 supply current vs. input votage v o =1.5v, i out =0 40 55 70 85 100 2.5 3.5 4.5 5.5 dropout voltage vs. load current 0 20 40 60 80 100 120 140 160 0 50 100 150 200 250 300 load current (ma) dropout voltage (mv) psrr vs. frequency i out =300ma 0 10 20 30 40 50 60 70 frequency (hz) psrr (db) output voltage accuray vs. temperature -0.5 -0.3 -0.1 0.1 0.3 0.5 -40 -20 0 20 40 60 80 temperature ( o c) output voltage accuracy(%) transient duration vs. reset threshold overdrive reset threshold overdrive (mv) pluse duration (us) 0 30 60 90 120 110100 region of stable cout esr vs. load current 0 0.5 1 1.5 2 2.5 3 0 50 100 150 200 250 300 load current (ma) reset asserts above this line unstable region stable region 10 10 2 10 3 10 4 10 5 10 6
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 8 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. typical performanc e characteristics (continued) v in =5v, v out =3.3v, c out =3.3 f, t a = -40c to +85c, typical values are at t a =+25c, unless otherwise noted. v out 2v/div. v reset 2v/div. v in 5v/div. reset response to v in rising adj=gnd,i out = 0
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 9 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. block diagram ea -- + -- + -- + thermal protection mode selector vref2 vref1 driver en en adj in out reverse current protection current limit vref3 logic reset reset reset comparator figure 1?mp6401 block diagram
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 10 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. timing diagram 5v 0 vin t figure 2?reset timing diagram
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 11 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. operation the mp6401 integrates a low noise, low dropout, low quiescent current linear regulator and a microprocessor reset circuit. it operates from a 2.5v to 5.5v input voltage and regulates the fixed output voltage with 2% accuracy at 1.8v, 2.5v, 3.3v or adjustable value. the mp6401 can supply to 300ma of load current. the internal reset circuit is used to monitor the regulator output voltage. the reset asserts when the regulator output voltage drops below the standard microprocessor supply threshold. linear regulator the mp6401 can output a fixed voltage (1.8v, 2.5v, 3.3v options) or adjustable voltage which ranges from 1.25v to 5v with 2.0% accuracy by operating from a +2.5v to +5.5v input. the mp6401 can supply up to 300ma of load current. when adj is connected to gnd, a fixed output voltage is selected. connecting adj pin to the tap of external resistor divider from the out to gnd, adjustable output voltage is selected. the typical adj connection is shown in fig 3. 2.5v to 5.5v in out adj en gnd mp6401 r1 r2 figure 3?output voltage adjusted with resistor divider reset function the reset circuit monitors the out voltage. reset asserts while out voltage falls below its threshold. two out voltage thresholds (-7.5% and -12.5%) are available . the power-up, power-down, and brownout conditions will make reset asserted . so mp6401 monitor circuit could right control the microprocessor. reset asserts when the input and output voltage below their thresholds. reset asserts when en is a low logic. when the assert trigger condition is removed, reset will deassert after a fixed delay time. four options of reset delay-time (see table 3) can be selected. en shutdown the mp6401 can be switched on or off by a logic input at the en pin. a high voltage at this pin will turn the device on. when the en pin is low, the regulator output is off and the supply current is reduced. generally, the en pin should be tied to in to keep the regulator output always on. do not float the en pin. reverse leakage protection an internal circuit monitors v in and v out to control the reverse leakage current from out to in. while v in decreases lower than v out and en still hold logic high, the monitor circuit turns off the pass element and its parasitic diode. typically the reverse leakage current through pass element decreases to 0.1ua. reset deasserts until v in returns greater than v out and v out is higher than its preset threshold. mp6401 also can work with backup battery at out after input power supply is removed as shown in fig 4. when input power supply is removed, reset asserts. the backup battery will power the device through two external diodes and typically the current from out to ground is 40ua. so, the power supply removing does not erase ram content if the voltage of backup battery is greater than memory?s standby specification. the backup battery can be replaced by a super-cap, while the diode connected with battery is changed to a current-limiting resistor. mp6401 in out en removable memory up 3.3uf backup battery figure 4? maintain memory with backup battery current limit the mp6401 includes a current limit structure which monitors and controls pass element gate voltage limiting the guaranteed maximum output current to 500ma.
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 12 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. thermal shutdown thermal protection turns off the pass element when the junction temperature exceeds +150oc, allowing to cool the ic. when the ic?s junction temperature drops by 20oc, the pass element will be turned on again. thermal protection limits total power dissipation on the mp6401. for reliable operation, junction temperature should be limited to 125 oc maximum.
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 13 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. application information adjustable regulator output the out voltage of mp6401 has two modes available (fixed and adjustable output voltage). when adj pin is connected to gnd, the regulator works in fixed voltage mode. the regulator output voltage will equal to preset voltage (1.8v, 2.5v or 3.3v options). in fixed voltage mode, the impedance between adj and ground should always be less than 50k ? . generally, adj is connected directly to ground. when the adj pin is connected to the tap of an external resistor divider, the regulator works in adjustable voltage mode as shown in fig 3. the output voltage is selected by resistor divider, thus 12 out 2 rr v 1.229 r + = in adjustable voltage mode, r 2 equal to 13k ? is recommended as a good tradeoff among stability, accuracy and high-frequency psrr. r 2 should be not greater than 100k ? . power dissipation the power dissipation for any package depends on the thermal resistance of the case and circuit board, the temperature difference between the junction and ambient air, and the rate of airflow. the power dissipation across the device can be represented by the equation: p = (v in - v out ) i out the allowable power dissipation can be calculated using the following equation: p d (max) = (t j (max)-t a )/ ja where (t j (max)-t a ) is the temperature difference between the junction and the ambient environment, ja is the thermal resistance from the junction to the ambient environment. connecting the gnd pin of mp6401 to ground using a large pad or ground plane helps to channel heat away. output capacitor selection the mp6401 is designed specifically to work with very low esr ceramic output capacitor 3.3uf (min). for performance consideration, a large ceramic capacitor such as 10uf is better. x7r or x5r capacitor dielectric is recommended. out voltage transient immunity the mp6401 can be immune to out pin short negative transient. typically, the immune duration is 60us with 10mv overdriving. a shorter negative transient can not make the reset output assert.
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 14 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. package information tqfn8 (3mm x 3mm) side view top view 1 8 5 4 bottom view 2.90 3.10 1.45 1.75 2.90 3.10 2.25 2.55 0.65 bsc 0.20 0.30 0.70 0.80 0.00 0.05 0.20 ref pin 1 id marking 1.70 0.65 0.25 recommended land pattern 2.90 pin 1 id see detail a 2.50 0.70 pin 1 id option b r0.20 typ. pin 1 id option a 0.30x45 o typ. detail a 0.30 0.50 pin 1 id index area
mp6401 ? 300ma ldo linear regulator with integrated reset ic mp6401 rev. 1.0 www.monolithicpower.com 15 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. tqfn6 (2mm x 2mm) side view top view 1 6 4 3 bottom view 1.90 2.10 0.65 0.85 1.90 2.10 1.25 1.45 0.65 bsc 0.20 0.30 0.70 0.80 0.00 0.05 0.20 ref pin 1 id marking 0.70 0.65 0.25 recommended land pattern 1.90 note: 1) all dimensions are in millimeters. 2) exposed paddle size does not include mold flash. 3) lead coplanarity shall be 0.10 millimeter max. 4) jedec reference is mo-229, variation wccc. 5) drawing is not to scale. pin 1 id see detail a 1.40 0.70 pin 1 id option a 0.30x45o typ. pin 1 id option b r0.20 typ. detail a 0.30 0.40 pin 1 id index area
mp6401 ? 300ma ldo linear regulator with integrated reset ic notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. mp6401 rev. 1.0 www.monolithicpower.com 16 9/7/2012 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. tsot23-6 0.30 0.50 seating plane 0.95 bsc 0.84 0.90 1.00 max 0.00 0.10 top view front view side view recommended land pattern 2.80 3.00 1.50 1.70 2.60 3.00 1 3 4 6 0.09 0.20 note: 1) all dimensions are in millimeters. 2) package length does not include mold flash, protrusion or gate burr. 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (botto m of leads after forming) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-193, variation ab. 6) drawing is not to scale. 7) pin 1 is lower left pin when reading top mark from left to right, (see example top mark) 0.30 0.50 0 o -8 o 0.25 bsc gauge plane 2.60 typ 1.20 typ 0.95 bsc 0.60 typ see detail "a" detail a aaaa pin 1 see note 7 example top mark

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