general description the MAX8532 offers the benefits of low-dropout voltage and ultra-low power regulation in a subminiaturized ucsp, making it ideal for space-restricted portable equipment. the device operates from a 2.5v to 6.5v input and delivers up to 200ma, with low dropout of 100mv (typ) at 100ma. designed with an internal p-channel mosfet pass transistor, the supply current is kept at a low 80?, independent of the load current and dropout voltage. other features include short-circuit protection and thermal -shutdown protection. the MAX8532 includes a reference bypass pin for low output noise (40? rms ) and a logic-controlled shutdown input. the device is available in a tiny 6-pin ucsp. applications cellular and cordless phones pdas and palmtop computers notebook computers digital cameras pcmcia cards wireless lan cards hand-held instruments features ? guaranteed 200ma output current ? low 100mv (typ) dropout at 100ma ? low 40 v rms output noise ? low 80 a operating supply current ? 62db psrr ? < 1 a shutdown current ? thermal-overload and short-circuit protection ? output current limit ? tiny 1.16mm x 1.57mm x 0.66mm ucsp (3 x 2 grid) MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp ________________________________________________________________ maxim integrated products 1 MAX8532ebt ucsp a2 a3 a1 shdn gnd bp in out n.c. b1 b2 b3 top view bump configuration ordering information 19-2733; rev 1; 2/12 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. * ??= output voltage code (see the output voltage selector guide). note: devices are also available in a lead(pb)-free/rohs-com- pliant package. specify lead-free by adding ??to the part num- ber when ordering. evaluation kit available part temp range out voltage pin- package MAX8532ebt_* -40 c to +85 c 1.5v to 3.3v 6 ucsp output voltage selector guide part v out (v) top mark MAX8532ebtj 2.85 acp MAX8532ebtg 3 acu MAX8532ebt2 1.8 acv note: contact the factory for other output voltages between 1.5v and 3.3v. the minimum order quantity is 25,000 units. in out 2.2 f c in 2.2 f input 2.5v to 6.5v output 1.5v to 3.3v at 200ma 10nf shdn off on bp gnd MAX8532 typical operating circuit
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (in = 3.8v, shdn = in, c bp = 10nf, t a = -40? to +85? , unless otherwise noted. typical values are at t a = +25?.) (note 2) in, shdn , bp to gnd ..............................................-0.3v to +7v out to gnd ................................................-0.3v to (v in + 0.3v) output short-circuit duration ........................................indefinite continuous power dissipation (t a = +70 c) 6-pin ucsp (derate 3.9mw/ c above +70 c) ..............308mw operating temperature range ...........................-40 c to +85 c junction temperature ......................................................+150 c storage temperature range .............................-65 c to +150 c 6-pin ucsp solder profile ............................................(note 1) soldering temperature (reflow) lead(pb)-free packages..............................................+260? packages containing lead(pb)....................................+240? parameter symbol conditions min typ max units input voltage v in 2.5 6.5 v undervoltage lockout threshold v uvlo in rising, hysteresis is 40mv (typ) 2.15 2.25 2.42 v t a = +25?, i out = 1ma -1 +1 t a = -40? to +85?, i out = 1ma -2 +2 output voltage accuracy t a = - 40 c to + 85 c , i ou t = 0.1m a to 200m a-3 +3 % maximum output current i out 200 ma current limit i lim 210 330 550 ma no load 80 150 ground current i q i out = 100ma 100 ? dropout voltage v out - v in i out = 100ma (note 3) 100 200 mv line regulation ? v lnr in = (v out + 0.1v) to 3.8v -0.2 +0.2 %/v output voltage noise 10hz to 100khz, c out = 10?, i out = 10ma 40 v rms ripple rejection psrr 100hz, i out = 30ma 62 db shutdown shdn = 0, t a = +25? 0.01 1 shdn supply current i off shdn = 0, t a = +85? 0.1 ? v ih input high voltage 1.6 shdn input threshold v il input low voltage 0.4 v t a = +25? 0.7 100 shdn input bias current i shdn shdn = in or gnd t a = +85? 0.8 na thermal protection thermal-shutdown temperature t shdn t j rising 160 ? thermal-shutdown hysteresis ? t shdn 10 ? stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. note 1: for ucsp solder profile information, visit www.maxim-ic.com/1st_pages/ucsp.html . note 2: all units are 100% production tested at t a = +25?. limits over the operating temperature range are guaranteed by design. note 3: the dropout voltage is defined as v in - v out , when v out is 100mv below the value of v out for v in = v out + 0.5v. specification applies only when v out > = 2.5v.
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp _______________________________________________________________________________________ 3 supply current vs. supply voltage MAX8532 toc01 supply voltage (v) supply current ( a) 6 5 4 3 2 1 80 60 40 100 120 140 0 0 no load 20 80ma load supply current vs. load current MAX8532 toc02 load current (ma) supply current ( a) 70 60 40 50 20 30 10 20 40 60 80 100 120 140 0 080 supply current vs. temperature MAX8532 toc03 temperature ( c) supply current ( a) 60 35 10 -15 20 40 60 80 100 120 140 0 -40 85 dropout voltage vs. load current MAX8532 toc04 load current (ma) dropout voltage (mv) 180 140 160 120 80 100 40 60 20 50 100 150 200 250 0 0200 ldo dropout voltage vs. v out MAX8532 toc05 v out (v) dropout voltage (mv) 3.2 3.1 3.0 2.9 2.8 2.7 2.6 20 40 60 80 100 120 0 2.5 3.3 i out = 80ma output voltage accuracy vs. temperature MAX8532 toc06 temperature ( c) output voltage (%) 60 35 10 -15 -0.4 -0.2 0 0.2 0.4 0.6 -0.6 -40 85 psrr vs. frequency MAX8532 toc07 frequency (khz) psrr (db) 100 10 1 0.1 10 20 30 40 50 60 70 0 0.01 1000 100 ? load output noise spectral density vs. frequency MAX8532 toc08 frequency (khz) noise density (nv rms / hz) 10 1 0.1 100 1000 10000 10 0.01 100 output noise (10hz to 100khz) MAX8532 toc09 1ms/div v out 500 v/div typical operating characteristics (v out = 2.85v, load = 80ma, v in = 3.8v, c out = 2.2?, c bp = 0.01?, and c in = 2.2?. t a = +25?, unless otherwise noted.)
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp 4 _______________________________________________________________________________________ line transient MAX8532 toc10 v out 4.5v 40 s/div v in 3.5v 1v/div 20mv/div ac-coupled load transient v in = 3.35v, i load = 1ma to 80ma MAX8532 toc11 i load 50ma/div 10 s/div v out 0 20mv/div ac-coupled load transient near dropout MAX8532 toc12 i load 50ma/div 10 s/div v out 0 20mv/div ac-coupled v in = v out + 0.1v shutdown response MAX8532 toc13 v shdn 1v/div 1ms/div v out 0 0 2v/div typical operating characteristics (continued) (v out = 2.85v, load = 80ma, v in = 3.8v, c out = 2.2?, c bp = 0.01?, and c in = 2.2?. t a = +25?, unless otherwise noted.) bump description pin name function b3 n.c. not connected b2 in regulator input b1 out regulator output. guaranteed 200ma output current. a1 gnd ground a2 shdn shutdown input. a logic low shuts down the regulator. connect to in for normal operation. a3 bp reference noise bypass. bypass with a 0.01? ceramic capacitor for reduced noise.
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp _______________________________________________________________________________________ 5 detailed description the MAX8532 is a low-power, low-dropout, low-quies- cent current linear regulator designed primarily for bat- tery-powered applications. for preset output voltages, see the output voltage selector guide . the device supplies up to 200ma for out. the MAX8532 consists of a 1.25v reference, error amplifier, p-channel pass transistor, reference bypass block, and internal feed- back voltage divider. the 1.25v bandgap reference is connected to the error amplifier? inverting input. the error amplifier compares this reference with the feedback voltage and amplifies the difference. if the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled lower, allowing more current to pass to the output and increasing the output voltage. if the feedback voltage is high, the pass-transistor gate is pulled up, allowing less current to pass to the output. the output voltage is fed back through an internal resistor voltage-divider con- nected to the out pin. shutdown the MAX8532 has a single shutdown control input ( shdn ). drive shdn low to shut down the output, reducing supply current to 10na. connect shdn to a logic-high, or in, for normal operation. internal p-channel pass transistor the MAX8532 features a 1 ? p-channel mosfet pass transistor. a p-channel mosfet provides several advan- tages over similar designs using pnp pass transistors, including longer battery life. it requires no base drive, reducing quiescent current. pnp-based regulators waste considerable current in dropout when the pass transistor saturates and also use high base-drive currents under heavy loads. the MAX8532 does not suffer these prob- lems and consumes only 90? quiecent current whether in dropout, light-load, or heavy-load applications (see the typical operating characteristics ). whereas a pnp- based regulator has dropout voltage independent of the load, a p-channel mosfet? dropout voltage is propor- tional to load current, providing for low dropout voltage at heavy loads and extremely low dropout voltage at lighter loads. error amp in shdn gnd out bp mos driver with i limit thermal sensor 1.25v ref shutdown and power-on control MAX8532 functional diagram
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp 6 _______________________________________________________________________________________ current limit the MAX8532 contains an independent current limiter, which monitors and controls the pass transistor? gate voltage, limiting the output current to 210ma (min). the output can be shorted to ground indefinitely without damaging the part. thermal-overload protection thermal-overload protection limits total power dissipa- tion in the MAX8532. when the junction temperature exceeds t j = +160?, the thermal sensor signals the shutdown logic, turning off the pass transistor and allow- ing the ic to cool. the thermal sensor turns the pass transistor on again after the ic? junction temperature cools by 10?, resulting in a pulsed output during contin- uous thermal-overload conditions. thermal-overload protection is designed to protect the MAX8532 in the event of fault conditions. for continual operation, do not exceed the absolute maximum junc- tion temperature rating of t j = +150?. operating region and power dissipation the MAX8532? maximum power dissipation depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the airflow rate. the power dissi- pation across the device is p = i out (v in - v out ). maximum power dissipation: p max = (t j - t a )/( jb + ba ) where t j - t a is the temperature difference between the MAX8532 die junction and the surrounding air, jb (or jc ) is the thermal resistance of the package, and ba is the thermal resistance through the printed circuit board, copper traces, and other materials, to the surrounding air. low-noise operation an external 0.01? bypass capacitor at bp, in conjunc- tion with an internal resistor, creates a lowpass filter. the MAX8532 exhibits 40? rms output voltage noise with c bp = 0.01? and c out = 2.2? (see the output noise spectral density vs. frequency graph in the typical operating characteristics ). applications information capacitor selection and regulator stability use a 2.2? capacitor on the MAX8532? input. larger input capacitor values with lower esr provide better supply-noise rejection and line-transient response. to reduce noise and improve load transients, use large output capacitors up to 10?. for stable operation over the full temperature range and with rated maximum load currents, use a minimum of 2.2? (or 1? for <150ma loading) for out. note that some ceramic dielectrics exhibit large capac- itance and esr variation with temperature. with dielectrics such as z5u and y5v, use 4.7? or more to ensure stability at temperatures below -10?. with x7r or x5r dielectrics, 2.2? is sufficient at all operating temperatures. these regulators are optimized for ceramic capacitors. tantalum capacitors are not rec- ommended. psrr and operation from sources other than batteries the MAX8532 is designed to deliver low dropout volt- ages and low quiescent currents in battery-powered sys- tems. power-supply rejection is 62db at low frequencies (see the power-supply rejection ratio vs. frequency graph in the typical operating characteristics ). when operating from sources other than batteries, improve supply-noise rejection and transient response by increasing the values of the input and output bypass capacitors and through passive filtering techniques.
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp _______________________________________________________________________________________ 7 load-transient considerations the MAX8532 load-transient response graphs (see the typical operating characteristics ) show two compo- nents of the output response: a dc shift in the output voltage due to the different load currents, and the tran- sient response. increase the output capacitor? value and decrease its esr to attenuate transient spikes. input/output (dropout voltage) a regulator? minimum input/output voltage differential (or dropout voltage) determines the lowest usable supply voltage. in battery-powered systems, this determines the useful end-of-life battery voltage. because the MAX8532 uses a p-channel mosfet pass transistor, its dropout voltage is a function of drain-to-source on- resistance (r ds(on) ) multiplied by the load current (see the typical operating characteristics ). calculating the maximum output power in ucsp the maximum output power of the MAX8532 can be lim- ited by the maximum power dissipation of the package. ascertain the maximum power dissipation by calculat- ing the power dissipation of the package as a function of the input voltage, output voltage, and output current. the maximum power dissipation should not exceed the package? maximum power rating: p = (v in(max) - v out ) x i out where: v in(max) = maximum input voltage p max = maximum power dissipation of the package (308mw for ucsp) v out = output voltage of out i out = maximum output current of out p should be less than p max . chip information process: bicmos package information for the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. package type package code outline no. land pattern no. 6 ucsp b6-6 21-0097
MAX8532 low-noise, low-dropout, 200ma linear regulator in ucsp maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidanc e. 8 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2012 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 3/07 initial release 1 2/12 added MAX8532ebt2 to ordering information , updated lead-free and soldering information 1, 2
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