View MAX1963EZT285-T_6705020.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

general description the max1963/max1976 low-dropout linear regulators operate from a +1.62v to +3.6v supply and deliver a guaranteed 300ma continuous load current with a low 100mv dropout. the high-accuracy (?.5%) output voltage is preset to an internally trimmed voltage in the +0.75v to +3.0v range. an active-low, open-drain reset output remains asserted for at least 2.2ms (max1963) or 70ms (max1976) after the output voltage reaches regulation. these devices are offered in 6-pin thin sot23 and 6-pin 3mm x 3mm thin dfn packages. an internal pmos pass transistor allows the low supply current to remain independent of load and dropout volt- age, making these devices ideal for portable battery-pow- ered equipment such as personal digital assistants (pdas), cell phones, cordless phones, and notebook com- puters. other features include logic-controlled shutdown, short-circuit protection, and thermal-overload protection. applications notebook computers cellular and pcs telephones personal digital assistants (pdas) hand-held computers digital cameras pcmcia cards cd and mp3 players features ? low 1.62v minimum input voltage ? guaranteed 300ma output current ? 2.5% accuracy over load/line/temp ? low 100mv dropout at 300ma load ? 2.2ms (max1963) or 70ms (max1976) reset output flag ? supply current independent of load and dropout voltage ? logic-controlled shutdown ? thermal-overload and short-circuit protection ? preset output voltages (0.75v to 3.0v) ? tiny 6-pin thin sot23 package (<1.1mm high) ? thin 6-pin tdfn package (<0.8mm high) max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn ________________________________________________________________ maxim integrated products 1 ordering information 19-3040; rev 1; 5/04 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. part* temp range pin-package max1963 ezt_ _ _-t -40? to +85? 6 thin sot23-6 max1963ett_ _ _-t -40? to +85? 6 tdfn max1976 ezt_ _ _-t -40? to +85? 6 thin sot23-6 max1976ett_ _ _-t -40? to +85? 6 tdfn top view tdfn 3mm x 3mm i.c. out reset gnd in shdn 1 2 3 6 5 4 max1963 max1976 gnd reset shdn 1 6 out in max1963 max1976 thin sot23 2 3 4 i.c. 5 pin configurations * insert the desired three-digit suffix (see the selector guide) into the blanks to complete the part number. contact the factory for other output voltages. selector guide appears at end of data sheet. max1963 max1976 input 1.62v to 3.6v c out 4.7 f on off in c in 1 f 300ma shdn gnd output 0.75v to 3.0v logic supply 100k ? to c out reset t ypical operating circuit
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in = (v out + 0.5v) or 1.8v, whichever is greater; shdn n n t t t t n s r t e n shdn reset nd t nd n s d d t st tdn t r t s t r t reter s ndtns n t nts n n t n t t rs t n t d n d n t t t n r dr t r nr n t t n h h t t rs srr h t shtdn t s s shdn nd t h n shdn n t shdn shdn shdn t t d shdn t t
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn _______________________________________________________________________________________ 3 note 1: limits are 100% production tested at t a = +25?c. limits over the operating temperature range are guaranteed by design. note 2: the dropout voltage is defined as v in - v out , when v out is 4% lower than the value of v out when v in = v out + 0.5v. parameter symbol conditions min typ max units reset output reset threshold accuracy v out falling, (1.7% typical hysteresis) 80 82.5 85 %v out i reset reset n reset t reset h h reset reset t r d r t reset ther rtetn ts t t shdn ts h t shdn t n t shdn n n t t output voltage accuracy vs. load current max1963/76 toc01 load current (ma) output voltage accuracy (%) 250 200 150 100 50 -0.1 0 0.1 0.2 -0.2 0300 v out = +3.0v v out = +1.5v v out = +0.75v output voltage accuracy vs. input voltage max1963/76 toc02 input voltage (v) output voltage accuracy (%) 3.0 2.6 2.2 1.8 -0.25 0 0.25 0.50 -0.50 1.4 3.4 i out = 300ma i out = 100ma i out = 0ma v out = 1.5v output voltage accuracy vs. temperature max1963/76 toc03 temperature ( c) output voltage accuracy (%) 60 35 10 -15 -1.0 -0.5 0 0.5 1.0 1.5 -1.5 -40 85 v out = +1.5v i out = 0ma, 100ma, 300ma electrical characteristics (continued) (v in = (v out + 0.5v) or 1.8v, whichever is greater; shdn n n t t t t n
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn 4 _______________________________________________________________________________________ ground-pin current vs. load current max1963/76 toc04 load current (ma) ground-pin current ( a) 100 110 0.1 70 80 90 100 110 120 60 0.01 1000 v out = +3.0v v out = +0.75v v out = +1.5v ground-pin current vs. input voltage max1963/76 toc05 input voltage (v) ground-pin current ( a) 3.2 2.8 2.4 2.0 1.6 20 40 60 80 100 120 0 1.2 3.6 i out = 100ma i out = 300ma i out = 0ma v out = 1.5v ground-pin current vs. temperature max1963/76 toc06 temperature ( c) ground-pin current ( a) 60 40 20 0 -20 60 70 80 90 100 110 120 50 -40 80 i out = 100ma i out = 300ma i out = 0ma dropout voltage vs. load current max1963/76 toc07 load current (ma) v dropout (mv) 250 200 150 100 50 40 20 60 80 100 120 0 0300 v out = +1.8v v out = +3.0v power-supply rejection ratio vs. frequency max1963/76 toc08 frequency (khz) psrr (db) 100 10 1 10 20 30 40 50 60 70 80 0 0.1 1000 v out = +0.75v v out = +1.5v v out = +3.0v i out = 10ma line-transient response max1963/76 toc09 40 s/div v in 500mv/div 1.5v 10mv/div ac-coupled v out 3.5v t ypical operating characteristics (continued) (v in = (v out + 0.5v) or 1.8v, whichever is greater; shdn n n t t line-transient response near dropout max1963/76 toc10 40 s/div v in 500mv/div 1.5v 10mv/div ac-coupled v out 1.8v
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn _______________________________________________________________________________________ 5 load-transient response max1963/76 toc11 20 s/div 200ma/div 20mv/div ac-coupled 200ma v out i out 20ma v in = 3.6v v out = 1.5v load-transient response near dropout max1963/76 toc12 20 s/div 200ma/div 20mv/div ac-coupled 200ma v out v in = 1.8v v out = 1.5v i out 20ma t ypical operating characteristics (continued) (v in = (v out + 0.5v) or 1.8v, whichever is greater; shdn n n t t shutdown response max1963/76 toc13 100 s/div 1v/div 500mv/div v out 0 0 v shdn max1963/76 toc14 40ms/div 1v/div 1v/div 1v/div v out 0 0 0 v shdn v reset max1976 shutdown/reset response max1963/76 toc15 200ms/div 2v/div 1v/div 1v/div v out v in 0 0 0 v reset max1976 line/reset response
max1963/max1976 detailed description the max1963/max1976 are low-dropout, high-accuracy, low-quiescent-current linear regulators designed primarily for battery-powered applications. these devices supply loads up to 300ma and are available with preset output voltages from +0.75v to +3.0v. as illustrated in figure 1, the max1963/max1976 consist of a reference, an error amplifier, a p-channel pass transistor, an internal feed- back voltage-divider, and a power-good comparator. the reference is connected to the error amplifier, which 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, which allows more current to pass to the output and increases the output voltage. if the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to pass to the output. low-input-voltage, 300ma ldo regulators with reset in sot and tdfn 6 _______________________________________________________________________________________ pin description pin sot23 tdfn name function 16in regulator input. supply voltage can range from +1.62v to +3.6v. bypass in with at least a 1f ceramic capacitor to gnd (see the capacitor selection and regulator stability section). 2? gnd ground. gnd also functions as a heatsink. solder to a large pad or circuit-board ground plane to maximize sot23 power dissipation. ?4 gnd ground 35 shdn s n reset d r reset reset t nd t r s esr nd e e e s e tdn n nd shdn shtdn ther sensr re re ter errr s drer th t t reset d
internal p-channel pass transistor the max1963/max1976 feature a 0.33 (r ds(on) ) p-channel mosfet pass transistor. unlike similar designs using pnp pass transistors, p-channel mosfets require no base drive, which reduces quies- cent current. pnp-based regulators also waste consid- erable current in dropout when the pass transistor saturates and use high base-drive currents under large loads. the max1963/max1976 do not suffer from these problems and consume only 90a (typ) of quiescent current under heavy loads, as well as in dropout. shutdown pull shdn d t nd reset reset t reset t r t t t t t t t t r d t t t n t t t t t t nd d r reset st tdn maximum output current vs. input voltage (power dissipation limit) (v in - v out ) (v) maximum output current (ma) 2.5 2.0 1.5 1.0 0.5 100 200 300 400 0 03.0 maximum recommended output current 6-pin sot23 t a = +85 c t a = +70 c figure 2. power operating regions for the 6-pin sot23: maximum output current vs. input voltage maximum output current vs. input voltage (power dissipation limit) (v in - v out ) (v) maximum output current (ma) 2.5 2.0 1.5 1.0 0.5 100 200 300 400 0 0 3.0 maximum recommended output current 6-pin tdfn t a = +85 c figure 3. power operating regions for the 6-pin tdfn: maximum output current vs. input voltage
max1963/max1976 the max1963/max1976 deliver up to 300ma and oper- ate with an input voltage up to +3.6v. however, when using the 6-pin sot23 version, high output currents can only be sustained when the input-output differential voltage is less than 2v, as shown in figure 2. the maximum allowed power dissipation for the 6-pin tdfn is 1.951w at t a = +70?c. figure 3 shows that the maximum input-output differential voltage is not limited by the tdfn package power rating. applications information capacitor selection and regulator stability capacitors are required at the max1963/max1976 input and output for stable operation over the full tem- perature range and with load currents up to 300ma. connect a 1f ceramic capacitor between in and gnd and a 4.7f low-esr ceramic capacitor between out and gnd. the input capacitor (c in ) lowers the source impedance of the input supply. use larger output capacitors to reduce noise and improve load-transient response, stability, and power-supply rejection. the output capacitor?s equivalent series resistance (esr) affects stability and output noise. use output capacitors with an esr of 30m or less to ensure sta- bility and optimize transient response. surface-mount ceramic capacitors have very low esr and are com- monly available in values up to 10f. connect c in and c out as close to the max1963/max1976 as possible to minimize the impact of pc board trace inductance. noise, psrr, and transient response the max1963/max1976 are designed to operate with low dropout voltages and low quiescent currents in bat- tery-powered systems while still maintaining good noise, transient response, and ac rejection. see the typical operating characteristics for a plot of power- supply rejection ratio (psrr) versus frequency. when operating from noisy sources, improved supply- noise rejection and transient response can be achieved by increasing the values of the input and output bypass capacitors and through passive filtering techniques. the max1963/max1976 load-transient response (see the typical operating characteristics ) shows two com- ponents of the output response: a near-zero dc shift from the output impedance due to the load-current change, and the transient response. a typical transient response for a step change in the load current from 20ma to 200ma is 20mv. increasing the output capacitor?s value and decreasing the esr attenuates the overshoot. input-output (dropout) voltage a regulator?s minimum input-output voltage difference (dropout voltage) determines the lowest usable supply voltage. in battery-powered systems, this determines the useful end-of-life battery voltage. because the max1963/max1976 use a p-channel mosfet pass tran- sistor, the dropout voltage is a function of drain-to-source on-resistance (r ds(on) = 0.33 ) multiplied by the load current (see the typical operating characteristics ). v dropout = v in - v out = 0.33 i out the max1963/max1976 ground current reduces to 70a in dropout. low-input-voltage, 300ma ldo regulators with reset in sot and tdfn 8 _______________________________________________________________________________________ chip information transistor count: 2556 process: bicmos max1963 top mark max1976 top mark v out (v) suffix sot tdfn sot tdfn 0.75 075 aaba afq aaaq aga 0.85 085 ? ? aabp ahd 0.90 090 aabb afr aabk agb 1.00 100 aabc afs aabl agc 1.10 110 aabd aft aabm agd 1.20 120 aabe afu aaak age 1.30 130 aabf afv aabn agf 1.50 150 aabg afw aaal agg 1.60 160 ? ? aabo ahc 1.80 180 aabh afx aaam agh 2.50 250 aabi afy aaan agi 2.85 285 ? ? aaao agj 3.00 300 aabj afz aaap agk selector guide (note: standard voltage options, shown in bold , are available. contact the factory for other output voltages between 1.5v and 4.5v. minimum order quantity is 15,000 units.)
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn _______________________________________________________________________________________ 9 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn 10 ______________________________________________________________________________________ package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn ______________________________________________________________________________________ 11 package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) 6, 8, &10l, dfn thin.eps l c l c pin 1 index area d e l e l a e number of leads shown are for reference only e2 detail a n f 1 2 21-0137 package outline, 6, 8, 10 & 14l, tdfn, exposed pad, 3x3x0.80 mm
max1963/max1976 low-input-voltage, 300ma ldo regulators with reset in sot and tdfn 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. 12 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) common dimensions symbol min. max. a0.700 .80 d2.903 .10 e2.903 .10 a1 0.00 0.05 l 0.20 0.40 pkg. code n d2 e2 e jedec spec b [(n/2)-1] x e package variations 0.25 min. k a2 0.20 ref. 2.300.10 1.500.10 6 t633-1 0.95 bsc mo229 / weea 1.90 ref f 2 2 21-0137 package outline, 6, 8, 10 & 14l, tdfn, exposed pad, 3x3x0.80 mm 0.400.05 1.95 ref 0.300.05 0.65 bsc 2.300.10 8 t833-1 2.00 ref 0.250.05 0.50 bsc 2.300.10 10 t1033-1 2.40 ref 0.200.03 - - - - 0.40 bsc 1.700.10 2.300.10 14 t1433-1 1.500.10 1.500.10 mo229 / weec mo229 / weed-3 0.40 bsc - - - - 0.200.03 2.40 ref t1433-2 14 2.300.10 1.700.10

▲Up To Search▲

Price & Availability of MAX1963EZT285-T

	To Download MAX1963EZT285-T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .