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ge ne ra l de sc ript ion the max8890 is a power-management ic intended for cellular handsets using a single lithium-ion (li+) cell battery with input voltages from +2.5v to +5.5v. th e ic contains three identical, low-noise, low-dropout (l do) linear regulators to provide all of the supply volt age requirements for the rf portion of the handset. the first ldo is intended to power the transmitter, receiver, and synthesizer. the second ldo is intend ed to power the tcxo, and high-power voltage-controlle d oscillators (vcos). the third ldo is intended to po wer the uhf offset vco. each ldo has its own individual enable (on/ off ) con- trol to maximize design flexibility. the reference is pow- ered on if any of the enable inputs (en1, en2, en3) are logic high. the high-accuracy output voltage of eac h ldo is preset at an internally trimmed voltage (1.8 v to 3.3v in 50mv increments). each ldo is capable of su p- plying 100ma with a low 50mv dropout and is opti- mized for low noise and high crosstalk-isolation. designed with internal p-channel mosfet pass transi s- tors, the max8890s low 180a operating supply cur- rent is independent of load. other features include short-circuit and thermal-ov er- load protection. the max8890 is available in a com- pact, high-power, 12-pin 4mm ? 4mm qfn package with a metal pad on the underside. applic a t ions cellular handsets single-cell li+ systems 3-cell nimh, nicd, or alkaline systems personal digital assistants (pdas) fe a t ure s ? three 100ma low-dropout linear regulators ? low 50mv dropout voltage at 100ma ? 1% output voltage accuracy over temperature ? preset 1.8v to 3.3v output voltages (in 50mv increments) ? low 45v rms output voltage noise ? low 180a operating supply current ? 2.5v to 5.5v input voltage range ? 67db psrr ? 10v p-p channel-to-channel crosstalk ? short-circuit protection ? thermal-overload protection ? 0.01a shutdown current ? tiny 12-pin 4mm x 4mm qfn package m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c ________________________________________________________________ maxim integrated products 1 orde ring i nform a t ion 19-2075; rev 2; 10/02 standard versions table and pin configuration appear at end of data sheet. for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxims website at www.maxim-ic.com. part temp range pin package max8890etcxyz* -40 c to +85 c 12 (4mm x 4mm) qfn * each preset output voltage of these devices is fact ory trimmed to one of ten voltages. replace xyz with the letters corresponding to the desired output voltages (see s tandard preset output voltage suffixes table), where the th ree letter suffix corresponds to the following output voltages : x = v out1 , y = v out2 , and z = v out3 . note: there are five standard versions available (see sta ndard versions table). sample stock is generally held on standard versions only. standard versions have an order incr ement requirement of 2500 pieces. nonstandard versions ha ve an order increment requirement of 10,000 pieces. conta ct the factory for availability of nonstandard versions. suffix output voltage (v) suffix output voltage (v) a 3.30 h 2.75 b 3.00 j 2.70 d 2.90 k 2.50 f 2.85 l 2.00 g 2.80 m 1.80 st a nda rd pre se t out put volt a ge suffix e s * nonstandard output voltages between 1.80v and 3.30v are available in 50mv increments. on off in1 out1 in2 out2 in3 out3 en1 bp en2 en3 gnd max8890 input output #1 output #2 output #3 typic a l ope ra t ing circ uit downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in _ = 3.6v, en_ = in_, c in = 6.8f, c out _ = 2.2f, c bp = 0.01f, all ceramic capacitors t a = 0c to +85c , unless otherwise noted. typical values are at t a = +25 c.) stresses beyond those listed under absolute maximu m ratings may cause permanent damage to the device . these are stress ratings only, and functional operation of the device at these or any other condi tions beyond those indicated in the operational sec tions of the specifications is not implied. exposur e to absolute maximum rating conditions for extended per iods may affect device reliability. note a: as long as the maximum continuous power dissipation rating is not exceeded, the output can be shorted indefinitely. in_, en_ to gnd.................................... ...................-0.3v to +6v out_, bp to gnd .................................... ..-0.3v to (v in _ + 0.3v) output short-circuit protection (note a) ........... ............indefinite continuous power dissipation (t a = +70 c) 12-pin 4 x 4 qfn (derate 16.9mw/ c above +70 c) .......1349mw operating temperature range ........................ ...-40 c to +85 c junction temperature ............................... .......................+150 c storage temperature range .......................... ...-65 c to +150 c lead temperature (soldering, 10s) .................. ...............+300 c parameter symbol conditions min typ max units general input voltage v in _ 2.5 5.5 v input undervoltage lockout threshold v uvlo rising and falling edge 2.10 2.25 2.45 v input undervoltage hysteresis 45 mv supply current quiescent supply current i q i out _ = 0 180 330 a shutdown supply current en_ = out_ = gnd 0.01 10 a linear regulators t a = +85 c- 1+ 1 output voltage accuracy v out _ v in _ = 0.5v + the highest of (v out1 , v out2 , or v out3 ), i out _ = 1ma to 100ma t a = 0 c +85 c- 2 + 2 % current limit i lim out_ = gnd 120 250 500 ma output pulldown resistance r out _ en_ = gnd 3 5 8 k i out _ = 1ma 1 i out _ = 50ma 25 dropout voltage (note 1) v in _ - v out _ i out _ = 100ma 50 100 mv line regulation v in _ = (v out _+ 0.1v) to 5.5v for v out _ 2.4v, or v in _ = 2.5v to 5.5v for v out _ < 2.4v, i out = 1ma -0.15 +0.15 %/v output voltage noise 10hz to 100khz, c out _ = 10f ceramic, v out _ = 2.8v, i out _ = 10ma 45 v rms output voltage psrr 100hz, c out _ = 2.2f ceramic, i out _ = 10ma 67 db channel-to-channel isolation 10khz, c out _ = 2.2f ceramic, i out _ = 10ma 64 db downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c _______________________________________________________________________________________ 3 electrical characteristics (v in _ = 3.6v, en_ = in_, c in = 6.8f, c out _ = 2.2f, c bp = 0.01f, all ceramic capacitors t a = -40 c to +85 c , unless otherwise noted.) (note 2) electrical characteristics (continued) (v in _ = 3.6v, en_ = in_, c in = 6.8f, c out _ = 2.2f, c bp = 0.01f, all ceramic capacitors t a = 0 c to +85 c , unless otherwise noted. typical values are at t a = +25 c.) note 1: the dropout voltage is defined as v in _ - v out _, when v out _ is 100mv below the set output voltage (the value of v out _ for v in _ = v out _ + 500mv). since the minimum input voltage range i s 2.5v, this specification is only meaningful when the set output voltage exceeds 2.7v (v out_(nom) 2.7v). note 2: specifications to -40 c are guaranteed by design, not production tested. parameter symbol conditions min typ max units enable logic control en_ input threshold v en _ 2.5v v in _ 5.5v 0.4 1.6 v en_ input bias current i en _v en _ = 5.5v or 0, t a = +85 c- 1+ 1 a thermal protection thermal-shutdown temperature t shdn rising temperature 160 c thermal-shutdown hysteresis ? t shdn 15 c parameter symbol conditions min max units general input voltage v in _ 2.5 5.5 v input undervoltage lockout threshold v uvlo rising and falling edge 2.10 2.45 v supply current quiescent supply current i q i out _ = 0 330 a shutdown supply current en_ = out_ = gnd 10 a linear regulators output voltage accuracy v out _ v in _ = 0.5v + the highest of (v out1 , v out2 , or v out3 ), i out _ = 1ma to 100ma -2 +2 % current limit i lim out_ = gnd 110 500 ma output pulldown resistance r out _ en_ = gnd 3 8 k dropout voltage v in _ - v out _ i out _ = 100ma (note 1) 100 mv line regulation v in _ = (v out _+ 0.1v) to 5.5v for v out _ 2.4v, or v in _ = 2.5v to 5.5v for v out _ < 2.4v, i out = 1ma -0.15 +0.15 %/v enable logic control en_ input threshold v en _ 2.5v v in _ 5.5v 0.4 1.6 v en_ input bias current i en _v en _ = 5.5v or 0, t a = +85 c- 1+ 1 a downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c 4 _______________________________________________________________________________________ typic a l ope ra t ing cha ra c t e rist ic s (circuit of figure 1, max8890etcggg, v in = 3.3v, en_ = in_, t a = +25 c, unless otherwise noted.) 0 1.0 0.5 2.0 1.5 2.5 3.0 02 3 1 456 output voltage vs. input voltage max8890 toc01 input voltage (v) output voltage (v) i out = no load 2.77 2.79 2.78 2.81 2.80 2.82 2.83 04 0 6 0 20 80 100 output voltage vs. load current max8890 toc02 load current (ma) output voltage (v) 2.77 2.79 2.78 2.81 2.80 2.82 2.83 -40 10 35 -15 60 85 output voltage vs. tem perature max8890 toc03 temperature ( c) output voltage (v) i out = 100ma 0 20 10 40 30 60 50 70 04 0 20 60 80 100 dropout voltage vs. load current max8890 toc04 load current (ma) dropout voltage (mv) t a = -40 c t a = +25 c t a = +85 c 0 60 40 20 80 100 120 140 160 180 200 02 1 3456 ground-pin current vs. input voltage max8890 toc05 input voltage (v) ground-pin current ( a) i out = no load i out1 = 100ma only one output enabled (en1 = in, en2 = en3 = gnd) 50 65 60 55 70 75 80 85 90 95 100 04 0 20 60 80 100 ground-pin current vs. load current max8890 toc06 load current (ma) ground-pin current ( a) only one output enabled (en1 = in, en2 = en3 = gnd) 50 70 60 90 80 110 100 120 -40 10 -15 35 60 85 ground-pin current vs. tem perature max8890 toc07 temperature ( c) ground-pin current ( a) i out1 = 100ma only one output enabled (en1 = in, en2 = en3 = gnd) 80 70 60 50 40 30 20 10 0 0.01 1 10 0.1 100 1000 power-supply rejection ratio max8890 toc08 frequency (khz) psrr (db) c in = 1 f + 0.1 f i out = 10ma 80 70 60 50 40 30 20 10 0 0.1 10 100 1 1000 channel-to-channel isolation max8890 toc09 frequency (khz) isolation (db) low-impedance input i out1 = 100ma sinusoidal load i out3 = 10ma downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c _______________________________________________________________________________________ 5 20 s/div load transient a b max8890 toc10 a. i out _ = 1ma to 100ma, 50ma/div b. v out _ = 2.8v, 20mv/div v in = 3.3v (v out _ +500mv) 20 s/div load transient near dropout a b max8890 toc11 a. i out _ = 1ma to 100ma, 50ma/div b. v out _ = 2.8v, 20mv/div v in = 2.9v (v out _ + 100mv) 40 s/div line transient response a b max8890 toc12 a. v in = 3.5v to 4.0v, 200mv/div b. v out_ = 2.8v, 2mv/div i out = 100ma 4.0v 3.5v 2.8v 5ms/div startup waveform (c bp = 0. 1 f) a c b max8890 toc15 a. v in = 0 to 3.3v, 5v/div b. v out _ = 2.8v, 2v/div c. v bp = 1.25v, 1v/div r out _ = 28 (100ma) 20 s/div startup waveform (c bp = 0. 01 f) a c b max8890 toc14 a. v in = 0 to 3.3v, 5v/div b. v out_ = 2.8v, 2v/div c. v bp = 1.25v, 1v/div r out _ = 28 (100ma) 1000 1 0.1 10 100 1000 crosstalk voltage 10 100 max8890 toc13 frequency (khz) crosstalk ( vp-p) 1 low-impedance input i out1 = 100ma sinusoidal load i out3 = 10ma typic a l ope ra t ing cha ra c t e rist ic s (c ont inue d) (circuit of figure 1, max8890etcggg, v in = 3.3v, en_ = in_, t a = +25 c, unless otherwise noted.) downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c 6 _______________________________________________________________________________________ typic a l ope ra t ing cha ra c t e rist ic s (c ont inue d) (circuit of figure 1, max8890etcggg, v in = 3.3v, en_ = in_, t a = +25 c, unless otherwise noted.) 20 s/div enable waveform (1st output) a c d b max8890 toc16 a. v en1 = 0 to 3.3v, 5v/div b. v out1 = 2.8v, r out1 = 28 (100ma), 2v/div c. v bp = 1.25v, 1v/div d. i in , 200ma/div v in = 3.3v, en2 = en3 = gnd, c bp = 0.01 f 20 s/div enable waveform (2nd output) a c d b max8890 toc17 a. v en2 = 0 to 3.3v, 5v/div b. v out2 = 2.8v, r out2 = 28 (100ma), 2v/div c. v bp = 1.25v, 1v/div d. i in , 200ma/div v in = 3.3v, en1 = in, en3 = gnd, c bp = 0.01 f pin de sc ript ion pin name function 1 in1 regulator 1 input. supply voltage can range from 2. 5v to 5.5v. bypass with a capacitor to gnd (see capacitor selection and regulator stability section). 2 in2 regulator 2 input. supply voltage can range from 2. 5v to v in1 . bypass with a capacitor to gnd (see capacitor selection and regulator stability section). 3 out2 regulator 2 output. sources up to 100ma. bypas s with a 2.2f ceramic capacitor to gnd. 4 en1 active-high enable input for regulator 1. a logic l ow shuts down the first linear regulator. in shutdo wn, out1 is pulled low through an internal 5k resistor. connect to in1 for normal operation. 5 en2 active-high enable input for regulator 2. a logic l ow shuts down the second linear regulator. in shutdown, out2 is pulled low through an internal 5k resistor. connect to in2 for normal operation. 6 en3 active-high enable input for regulator 3. a logic l ow shuts down the third linear regulator. in shutdown, out3 is pulled low through an internal 5k resistor. connect to in3 for normal operation. 7b p 1.25v voltage reference bypass pin. connect a 0.01 f ceramic bypass capacitor from bp to gnd to minimize the output noise. make no other connection to this pin. 8 gnd ground. connect both ground pins together exter nally, as close to the ic as possible. 9 in3 regulator 3 input. supply voltage can range from 2. 5v to v in1 . bypass with a capacitor to gnd (see capacitor selection and regulator stability section). 10 out3 regulator 3 output. sources up to 100ma. bypa ss with a 2.2f ceramic capacitor to gnd. 11 gnd ground. connect both ground pins together exte rnally, as close to the ic as possible. 12 out1 regulator 1 output. sources up to 100ma. bypa ss with a 2.2f ceramic capacitor to gnd. ep gnd gr ound . t h e expo sed pa d a n d a l l f o u r c o r n er t a b s o n t h e q f n pa c k a g e a r e in t er n a l l y c o n n ec t ed to g r o u n d . the exp osed p ad functi ons as a heatsi nk. s ol d er to a l ar g e p ad or to the ci r cui t b oar d g r ound p l ane to m axi m i ze p ow er d i ssi p ati on. d o not use as d evi ce g r ound . downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c _______________________________________________________________________________________ 7 de t a ile d de sc ript ion the max8890 is an rf power-management ic for a cellular phone. the max8890 contains three low-nois e, low quiescent current, low-dropout, linear regulato rs for powering the transmitter, receiver, synthesizer, tc xo, and voltage controlled oscillators (vcos). each low - dropout linear regulator (ldo) supplies loads up to 100ma and is available with preset output voltages from 1.8v to 3.3v in 50mv increments. furthermore, the max8890 s input voltage range of 2.5v to 5.5v is per- fect for single-cell li+ battery or 3-cell nimh bat tery applications. as illustrated in figure 2, each regulator consists of an error amplifier, internal feedback resistive-divide r, and p-channel mosfet pass transistor. the output voltag e feeds back through the internal resistive-divider c on- nected to out_. this feedback voltage connects to t he error amplifier, which compares the feedback voltag e with the internal 1.25v reference voltage and ampli fies the difference. if the feedback voltage is lower th an the reference voltage, the pass-transistor gate is pull ed lower, which allows more current to flow to the out put and increases the output voltage. if the feedback v olt- age is too high, the pass-transistor gate is pulled up, allowing less current to flow to the output. clear transmission and reception in a cellular phon e can only be achieved with a low-noise power supply. therefore, all three ldos on the max8890 feature lo w output voltage noise, high power-supply rejection ratios, and excellent load and line regulation char acter- istics. designed for single-cell li+ battery applic ations where a pulsed current demand is required from the battery, each ldo is designed with 45v rms noise from 10hz to 100khz and psrr of 67db. the max8890 also features output current limiting (short-circuit protection), a low-power shutdown mo de, and thermal overload protection. i nt e rna l p-cha nne l pa ss m osfet each linear regulator features a 0.5 p-channel mosfet pass transistor. unlike similar designs using pnp p ass transistors, p-channel mosfets require no base driv e, which reduces the quiescent current. pnp based regu la- tors also waste considerable current in dropout whe n the pass transistor saturates and use high base-drive c ur- rents under large loads. the max8890 does not suffe r from these problems and consumes only 180a of quie s- cent current (all three regulators enabled). curre nt lim it (short -circ uit prot e c t ion) the max8890 contains separate current-limit circuit ry for each linear regulator. the device monitors and con- trols the gate voltage of each pass transistor, lim iting the regulator s output current to 250ma (typ). the out- put can be shorted to ground for an indefinite peri od of time without damage to the part as long as the maxi - mum continuous power dissipation rating is not exceeded. out put v olt a ge se le c t ion the max8890 is supplied with factory-set output vol t- ages from 1.8v to 3.3v in 50mv increments. the thre e- letter part number suffix identifies the output vol tage for each regulator. for example, the max8890etcakm s output voltages are preset to 3.3v (v out1 ), 2.5v (v out2 ), and 1.8v (v out3 ). on off in1 out1 in2 out2 in3 out3 en1 bp en2 en3 gnd max8890 c bp 0.01 f c out1 2.2 f c out2 2.2 f c out3 2.2 f c in 4.7 f input 2.5v to 5.5v output #1 (1.8v to 3.3v)* output #2 (1.8v to 3.3v)* output #3 (1.8v to 3.3v)* *see the ordering information and standard preset output voltage suffixes sections figure 1. typical application circuit downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c 8 _______________________________________________________________________________________ in1 en1 in2 en2 in3 en3 out1 bp gnd out2 out3 linear regulator #1 linear regulator #2 linear regulator #3 startup circuitry control locic ref 1.25v thermal shdn in1 error amplifier current limit r sense figure 2. functional diagram ena ble if any one of the three low-dropout linear regulato rs (ldos) is enabled, the internal 1.25v reference pow ers up. therefore, all three ldos must be disabled to s hut down the internal reference, reducing the supply cu r- rent to 0.01a. pull en_ low to enter shutdown. when any one of the linear regulators is shutdown, the corresponding max8890 output disconnects from the corresponding input, and the output discharges through an interna l 5k resistor. the capacitance and load determine the rate at which v out _ decays. do not leave en_ floating. connect en_ to in_ for normal operation. en_ can be pulled as high as 6v, regardless of the input and o utput voltages. t he rm a l-ove rloa d prot e c t ion thermal-overload protection limits the max8890 s total power dissipation in the event of fault conditions. each linear regulator has its own thermal-shutdown circu itry. downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c _______________________________________________________________________________________ 9 when the junction temperature exceeds t j = 160 c, a thermal sensor activates the shutdown logic, disabl ing the overheated regulator. the thermal sensor turns the linear regulator on again after the regulator s junction temperature cools by 15 c, resulting in a pulsed output during continuous thermal-overload conditions. for continuous operation, do not exceed the absolute ma xi- mum junction-temperature rating of t j = 150 c. applic a t ions i nform a t ion ca pa c it or se le c t ion a nd re gula t or st a bilit y capacitors are required at each input and each outp ut of the max8890 for stable operation over the full l oad range and full temperature range. connect a minimum 2.2f ceramic capacitor between out_ and ground to ensure stability and optimum transient response. us e larger 10f ceramic output capacitors for lower noi se requirements. the input capacitor (c in _) lowers the source imped- ance of the input supply, thereby reducing the inpu t noise and improving transient response. connect a minimum 1f ceramic capacitance between each in_ and ground. place all input and output capacitors a s close to the max8890 as possible to minimize the impact of pc board trace impedance. because in1 and in2 are next to each other, they may easily sha re a single 2.2f or larger ceramic capacitor. surface-mount ceramic capacitors have very low esr and are commonly available in values up to 10f. however, note that some ceramic dielectrics exhibit large capacitance and esr variation with temperatur e. z5u and y5v dielectrics may require a minimum 3.3f nominal output capacitance, especially with low tem - perature operation. re fe re nc e bypa ss ca pa c it or an external bypass capacitor is connected to bp to reduce the inherent reference noise. the capacitor forms a lowpass filter in conjunction with an inter nal network. use a 0.01f or greater ceramic capacitor connected as close to bp as possible. capacitance values greater than 0.01f will increase the startu p time. (see typical operating characteristics for startup waveforms.) for the lowest noise, increase the bypa ss capacitor to 0.1f. values above 0.1f provide no p er- formance improvement and are therefore not recom- mended. do not place any additional loading on this reference bypass pin. n oise , psrr, a nd t ra nsie nt re sponse the max8890 is designed to operate with low dropout voltages and low quiescent currents in battery-powe red systems while providing low noise, fast transient response, and high ac rejection. see the typical operating characteristics for a plot of power-supply rejection ratio (psrr) vs. frequency. when operatin g from noisy sources, improved supply-noise rejection and transient response can be achieved by increasin g the values of the input and output bypass capacitor s and through passive filtering techniques. the max8890 load-transient response graphs (see typical operating characteristics ) show two compo- nents of the output response: a dc shift from the o utput impedance due to the load current change and the transient response. increasing the output capacitor s value and decreasing the esr reduces the transient under/overshoot. i nput -out put (dropout ) v olt a ge a regulator s minimum input-to-output voltage differen- tial (dropout voltage) determines the lowest useabl e input supply voltage. once the linear regulator rea ches dropout, the series pass transistor is fully on and regu- lation ceases. the output voltage tracks the input volt- age as the input voltage drops lower. because the max8890 uses p-channel mosfet pass transistors, its dropout voltage is a function of the mosfet s drain-to- source on-resistance (r ds(on) ) multiplied by the load current (see typical operating characteristics ): v dropout = v in _ - v out _ = r ds(on) ? i out _ downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c 10 ______________________________________________________________________________________ 12 out1 11 gnd 10 out3 9 in3 8 gnd 7 bp 4 en1 5 en2 6 en3 1 in1 2 in2 3 out2 max8890 top view 4 ? 4 qfn pin configura t ion version top mark max8890etcaaa aabg max8890etcddd aabh max8890etcggg aabi max8890etcmmm aabj max8890etcakm aabk max8890etcabk aabn st a nda rd ve rsions chip i nform a t ion transistor count: 1472 process: bicmos downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c ______________________________________________________________________________________ 11 24l qfn thin.eps 21-0139 a package outline 12,16,20,24l qfn thin, 4x4x0.8 mm a 21-0139 package outline 12,16,20,24l qfn thin, 4x4x0.8 mm pa c k a ge i nform a t ion (the package drawing(s) in this data sheet may not reflect the most current specifications. for the la test package outline information, go to www.maxim-ic.com/packages .) downloaded from: http:///
m ax 8 8 9 0 i nt e gra t e d ce llula r rf-se c t ion pow e r-m a na ge m e nt i c maxim cannot assume responsibility for use of any c ircuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the cir cuitry and specifications without notice at any tim e. 12 ____________________m a x im i nt e gra t e d produc t s, 1 2 0 sa n ga brie l drive , sunnyva le , ca 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0 ? 2002 maxim integrated products printed usa is a reg istered trademark of maxim integrated products. pa c k a ge i nform a t ion (c ont inue d) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the la test package outline information, go to www.maxim-ic.com/packages .) downloaded from: http:///

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