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as1329 low voltage, micropower, dc-dc step-up converters www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 1 - 21 datasheet 1 general description the as1329a, as1329b and the as1329c are synchronous, fixed frequency, very high-efficiency dc-dc boost converters capable of supplying 3.3v at 160ma from a single aa-supply. compact size and minimum external parts requirements make these devices perfect for modern portable devices. high-speed switching frequency (1.2mhz) and internally compensated pwm current mode design provide highly-reliable dc- dc conversion, especially when driving white leds. the converters are available as the standard products listed in table 1 . the devices contain two internal mosfet switches: one nmos switch and one pmos synchronous rectifier. anti-ringing control circuitry reduces emi by damping the inductor in discontinuous mode, and the devices exhibit extremely low quiescent current (< 1a) in shutdown. in shutdown mode the battery is connected directly to the output enabling the supply of real-time-clocks. the as1329 is available in a 6-pin tsot-23 package and 6-bump wl-csp. figure 1. typical application diagram ? single cell to 3.3v synchronous boost converter 2 key features low start-up voltage: 0.85v output range: 2.5v to 5.0v single-cell operation operating with coils down to 2.2h delivers 160ma @ 3.3v (from single aa cell) delivers 220ma @ 5.0v (from two aa cells) delivers 570ma @ 3.3v (from two aa cells) 95% efficiency high-speed fixed-frequency: 1.2mhz internal pmos synchronous rectifier automatic powersave operation (as1329a&b) continuous switching at light loads (as1329c) logic controlled shutdown (< 1a) 6-pin tsot-23 package and 6-bump wl-csp 3 applications the as1329 is ideal for low-power applications where ultra-small size is critical as in medical diagnostic equipment, hand-held instruments, pagers, digital cameras, remote wireless transmitters, mp3 players, lcd bias supplies, cordless phones, gps receivers, and pc cards. table 1. standard products model light load switching as1329a medium load automatic powersave operation as1329b light load automatic powersave operation as1329c continuous switching aa battery as1329 c 2 10f r 2 604k 1% r 1 1.02m 1% on off l1 4.7h c 1 10f gnd 2 sw 1 v out 3.3v 160ma 4 shdnn 3 fb 6 vin 5 vout
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 2 - 21 as1329 datasheet - pin assignments 4 pin assignments figure 2. pin assignments (top view) 4.1 pin descriptions table 2. pin descriptions pin number pin name description 1 sw switch pin . connect an inductor between this pin and v in . keep the pcb trace lengths as short and wide as is practical to reduce emi and voltage overshoot. if the inductor current falls to zero, or pin shdnn is low, an internal 100 anti-ringing switch is connected from this pin to v in to minimize emi. note: an optional schottky diode can be connected between this pin and v out . 2 gnd signal and power ground . provide a short, direct pcb path between this pin and the negative side of the output capacitor(s). 3 fb feedback pin . feedback input to the g m error amplifier. connect a resistor divider tap to this pin. the output voltage can be adjusted from 2.5 to 5v by: v out = 1.23v[1 + (r 1 /r 2 )] 4 shdnn shutdown pin . logic controlled shutdown input. 1 = normal operation, 1.2mhz typical operating frequency. 0 = shutdown; quiescent current <1a. if shdnn is undefined, pin sw may ring. note: in a typical application, shdnn should be connected to v in through a 1m pull-up resistor. 5 vout output voltage sense input and drain of the internal pmos synchronous rectifier . bias is derived from v out when v out exceeds v in . pcb trace length from v out to the output filter capacitor(s) should be as short and wide as is practical. 6vin input voltage . the as1329 gets its start-up bias from v in unless v out exceeds v in , in which case the bias is derived from v out . thus, once started, operation is completely independent from v in . operation is only limited by the output power level and the internal series resistance of the supply. 1 sw as1329 2 gnd 3 fb 6 vin 5 vout 4 shdnn
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 3 - 21 as1329 datasheet - absolute maximum ratings 5 absolute maximum ratings stresses beyond those listed in table 3 may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in section 6 electrical characteristics on page 4 is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. table 3. absolute maximum ratings parameter min max units notes vin to gnd -0.3 7 v shdnn, sw to gnd -0.3 7 v fb to gnd -0.3 5 v vout -0.3 7 v operating temperature range -40 +85 oc storage temperature range -65 +125 oc package body temperature +260 oc the reflow peak soldering temperature (body temperature) specified is in accordance with ipc/ jedec j-std-020 ?moisture/reflow sensitivity classification for non-hermetic solid state surface mount devices?. the lead finish for pb-free leaded packages is matte tin (100% sn).
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 4 - 21 as1329 datasheet - electrical characteristics 6 electrical characteristics t amb = -40c to +85oc, v in = +1.2v, v out = +3.3v, v shdnn = +1.2v (unless otherwise specified). typ values @ t amb = +25oc. note: all limits are guaranteed. the parameters with min and max values are guaranteed with production tests or sqc (statistical qual ity control) methods. table 4. electrical characteristics symbol parameter conditions min typ max units minimum start-up voltage i load = 1ma 0.85 1 v minimum operating voltage shdnn = v in 1 1. minimum v in operation after start-up is only limited by the battery?s ability to provide the necessary power as it enters a deeply dis- charged state. 0.65 0.85 v maximum operating voltage shdnn = v in 1 5v output voltage adjust range t amb = 25oc 2.5 5 v v fb feedback voltage t amb = t min to t max 1.192 1.23 1.268 v i fb feedback input current v fb = 1.25v 2 2. specification is guaranteed by design and not 100% production tested. 1 na i qpws quiescent current (powersave operation) v fb = 1.4v 3 , as1329a only 3. i qpws is measured at v out . multiply this value by v out /v in to get the equivalent input (battery) current. 30 50 a i shdnn shutdown current v shdnn = 0v 0.01 1 a i q quiescent current (active) v fb = 1.4v 3 , as1329b&c only 150 300 a i nmosswl nmos switch leakage v sw = 5v 0.1 5 a i pmosswl pmos switch leakage v sw = 0v 0.1 5 a r onnmos nmos switch on resistance v out = 3.3v 0.35 0.8 v out = 5v 4 4. specification is guaranteed by design and not 100% production tested. 0.20 0.7 r onpmos pmos switch on resistance v out = 3.3v 0.45 0.8 v out = 5v 4 0.30 0.7 i nmos nmos current limit v in = 2.5v 850 ma i ps powersave operation current threshold as1329a only 2 3 ma as1329b only 2 0.3 ma max duty cycle v fb = 1v, t amb = t min to t max 80 87 % f sw switching frequency t amb = 25oc 0.95 1.2 1.5 mhz t amb = t min to t max 0.85 1.2 1.5 v shdnnh shdnn input high 1 v v shdnnl shdnn input low 0.35 v i shdnn shdnn input current v shdnn = 5.0v 0.01 1 a
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 5 - 21 as1329 datasheet - typical operating characteristics 7 typical operating characteristics all measurements are performed with as1329a, v out = 3.3v, t amb = +25oc, unless otherwise specified. parts used for measurements: l= 10h (mos6020-103ml), c in and c out = 10f (grm31cr70j106ka01l) figure 3. v out vs. battery voltage; i out = 10ma figure 4. v out vs. temperature; i out = 10ma 0 0.5 1 1.5 2 2.5 3 3.5 00.511.522.533.5 battery voltage (v) output voltage (v) . 3.24 3.26 3.28 3.3 3.32 3.34 3.36 -50-25 0 25 50 75100 temperature (c) output voltage (v) . figure 5. startup voltage vs. output current figure 6. powersave threshold vs. input voltage 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 0.1 1 10 100 output current (m a) startup voltage (v) . vout = 3. 3v vout = 5. 0v 0 20 40 60 80 100 120 1 1.25 1.5 1.75 2 2.25 2.5 battery voltage (v) output current (ma) . as1329a as1329b figure 7. i out vs. v batt ; v out = 3.3v, 3% tolerance figure 8. i out vs. v batt ; v out = 5.0v, 3% tolerance 0 100 200 300 400 500 600 700 800 900 1000 0.5 1 1.5 2 2.5 3 battery voltage (v) output current (ma) . 0 100 200 300 400 500 600 700 800 900 0.51 1.52 2.53 3.54 battery voltage (v) output current (ma) .
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 6 - 21 as1329 datasheet - typical operating characteristics figure 9. no load battery current vs. battery voltage; figure 10. efficiency vs. battery voltage; as1329a 10 100 1000 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 battery voltage (v) battery current (a) . 20 30 40 50 60 70 80 90 100 0.7 1.2 1.7 2.2 2.7 3.2 battery voltage (v) efficiency (%) . i l oad = 80a i l oad = 800a i l oad = 11ma figure 11. efficiency vs. output current of as1329a figure 12. efficiency vs. output current of as1329b 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 output current (m a) efficiency (%) . vi n = 1. 0v vi n = 1. 5v vi n = 2. 2v vi n = 2. 4v 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 output current (m a) efficiency (%) . vi n = 1. 0v vi n = 1. 5v vi n = 2. 2v vi n = 2. 4v figure 13. efficiency vs. output current of as1329c figure 14. efficiency vs. i out comparison; v in = 2.0v 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 output current (m a) efficiency (%) . vi n = 1. 0v vi n = 1. 5v vi n = 2. 2v 20 30 40 50 60 70 80 90 100 1 10 100 output current (m a) efficiency (%) . as1329a as1329b as1329c
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 7 - 21 as1329 datasheet - typical operating characteristics figure 15. sw pin antiringing operation; v in = 1.3v, l = 10h, c = 10f, i out = 5ma figure 16. sw pin fixed frequency continuous current; v in = 1.3v, l=10h, c=10f, i out = 100ma 100ns/div 0v 1v/div v sw 100ns/div v sw 0v 1v/div figure 17. v out transient response; v in = 1.3v, l = 10h, c = 10f figure 18. fixed frequency vs. powersave operation; v in = 1.3v, l = 10h, c = 10f 100s/div v out(ac) i out 40ma 100ma 100mv/div 10ms/div v out(ac) 1ma 60ma 100mv/div i out
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 8 - 21 as1329 datasheet - detailed description 8 detailed description the as1329 can operate from a single-cell input voltage (v in ) below 1v, and features fixed frequency (1.2mhz) and current mode pwm control for exceptional line- and load-regulation. with low r ds(on) and gate charge internal nmos and pmos switches, the device maintains high- efficiency from light to heavy loads. modern portable devices frequently spend extended time in low-power or standby modes, switching to high power-drain only when c ertain functions are enabled. the as1329a, as1329b and as1329c are ideal for portable devices since they maintain high-power conversio n efficiency over a wide output power range, thus increasing battery life in these types of devices. in addition to high-efficiency at moderate and heavy loads, the as1329a as well as the as1329b includes an automatic powersave mode that improves efficiency of the power converter at light loads. the powersave mode is initiated if the output load current falls bel ow a factory programmed threshold (see figure 6 on page 5) . note: the as1329c does not support powersave mode and provides continuous operation at all loads, eliminating low-frequency v out rip- ple at the expense of light load efficiency. figure 19. as1329 - block diagram 8.1 low-voltage start-up the as1329 requires v in of only 0.85v (typ) or higher to start up. the low-voltage st art-up circuitry controls the internal nmos switch up to a maximum peak inductor current of 850ma (typ), with 1.5ms (appr ox.) off-time during start-up, allowing the devices to start up i nto an output load. with a v out > 2.3v, the start-up circuitry is disabled and normal fixed-frequency pwm operation is initiated. in this mode, the as1329 ope rates independent of v in , allowing extended operating time as the battery can drop to several tenths of a volt without affecting output regulation. the limiting factor for the application is the ability of the battery to supply sufficient energy to the output. as1329 + ? start up osc pwm control a/b mux slope compensator 1.2mhz ramp generator + ? powersave operation control ? shutdown control pwm comp + ? 1.23v ref sync drive control a b v out good 2.3v g m error amp shutdown powersave 0.35 0.45 r 2 640k 1% r 1 1.02m 1% c ff * c out 4.7f 3.3v output c in 1f 1.5v single cell * optional current sense r c 80k c p2 2.5pf c c 150pf gnd 2 sw 1 4 shdnn 3 fb 6 vin 5 vout l1 4.7h
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 9 - 21 as1329 datasheet - detailed description 8.2 low-noise fixed-frequency operation 8.2.1 oscillator the as1329 switching frequency is internally fixed at 1.2mhz allowing the use of very small external components. 8.2.2 error amplifier the integrated error amplifier is an internally compensated trans-conductance (g m ) type (current output). the internal 1.23v reference voltage is compared to the voltage at pin fb to generate an error signal at the output of the error amplifier. a voltage divider from v out to gnd programs the output voltage from 2.5 to 5v via pin fb as: v out = 1.23v(1 + (r 1 /r 2 )) (eq 1) 8.2.3 current sensing a signal representing the internal nmos-switch current is summed with the slope compensator. the summed signal is compared to t he error amplifier output to provide a peak current control command for the pwm. peak switch current is limited to approximately 850ma i ndependent of v in or v out . 8.2.4 zero current comparator the zero current comparator monitors the inductor current to the output and shuts off the pmos synchronous rectifier once this current drops to 20ma (approx.). this prevents the inductor current from reversing polarity and results in improved converter efficiency at ligh t loads. 8.2.5 anti-ringing control anti-ringing control circuitry prevents high-frequency ringing on pin sw as the inductor current approaches zero. this is accom plished by damping the resonant circuit formed by the inductor and the capacitance on pin sw (c sw ). 8.3 powersave operat ion (as1329a, as1329b) in light load conditions, the integrated powersave feature removes power from all circuitry not required to monitor v out . when v out has dropped approximately 1% from nominal, the as1329a & b powers up and begins normal pwm operation. c out (see figure 19 on page 8) recharges, causing the as1329a and as1329b to re-enter powersave mode as long as the output load remains below the powersave threshold. the frequency of this intermittent pwm is proportional to load current; i.e., as the loa d current drops further below the powersave threshold, the as1329a and as1329b turns on less frequently. when the load current increases above the powersave threshold, the as1329a and as1329b will resume continuous, seamless pwm operation. while the as1329a switches to automatic powersave mode already at medium loads, the as1329b will do so only at very light loads . the as1329c is a continuous switching device, hence the output voltage ripple is very low and no additional frequencies are pro duced which may cause interference. notes: 1. an optional capacitor (c ff ) between pins v out and fb in some applications can reduce v outp-p ripple and input quiescent current during powersave mode. typical values for c ff range from 15 to 220pf. 2. in powersave mode, the as1329a and as1329b draws only 30a from the output capacitor(s), greatly improving converter effici ency. 8.4 shutdown when pin shdnn is low the as1329 is switched off and <1a current is drawn from battery; when pin shdnn is high the device is s witched on. if shdnn is driven from a logic- level output, the logic high-level (on) should be referenced to v out to avoid intermittent ly switching the device on. note: if pin shdnn is not used, it should be connected directly to pin out. in shutdown the battery input is connected to the output through the inductor and the internal synchronous rectifier p-fet. thi s allows the input battery to provide backup power for devices such as an idle microcontroller, memory, or real-time-clock, without the usual diod e forward drop. in this way a separate backup battery is not needed. in cases where there is residual voltage during shutdown, some small amount of energy will be transferred from pin out to pin b att immediately after shutdown, resulting in a momentary spike of the voltage at pin batt. the ratio of c in and c out partly determine the size and duration of this spike, as does the current-sink ability of the input device.
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 10 - 21 as1329 datasheet - application information 9 application information the as1329 is perfectly suited for led matrix displays, bar-graph displays, instrument-panel meters, dot matrix displays, set-t op boxes, white goods, professional audio equipment, medical equipment, industrial controllers to name a few applications. along with figure 1 on page 1 , figures 20-23 depict a few of the many applications for which the as1329 converters are perfectly suited. figure 20. single aa cell to 3.3v synchronous boost converter with load disconnect in shutdown figure 21. single lithium cell to 5v, 250ma as1329 c 2 4.7f r 2 604k 1% on off q1 l1 4.7h aa battery c 1 4.7f r 3 510k r 3 510k v out 3.3v, 160ma d1 r 1 1.02m 1% gnd 2 sw 1 4 shdnn 3 fb 6 vin 5 vout as1329 c 2 4.7f r 2 332k 1% r 1 1.02m 1% on off l1 4.7h lithium battery c 1 4.7f d1 c 3 100pf 100nf 2 optional snubber gnd 2 sw 1 4 shdnn 3 fb 6 vin 5 vout
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 11 - 21 as1329 datasheet - application information figure 22. single aa cell to 3v synchronous boost converter figure 23. single aa cell to 2.5v synchronous boost converter as1329 r 2 750k 1% r 1 1.02m 1% on off l1 4.7h aa battery c 1 4.7f c 3 1f d1 v out2 -3v, 10ma v out1 3v, 90ma c 2 4.7f c 4 10f d2 gnd 2 sw 1 4 shdnn 3 fb 6 vin 5 vout as1329 c 2 10f r 2 1.02m 1% r 1 1.02m 1% on off l1 4.7h aa battery c 1 10f v out 2.5v, 230ma d1 gnd 2 sw 1 4 shdnn 3 fb 6 vin 5 vout
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 12 - 21 as1329 datasheet - application information 9.1 output voltage ripple the as1329 is designed to work at high efficiency. in order to reduce the output ripple the following improvements are recommen ded: use a higher output capacitor, up to 44f and a higher input capacitor (22f). use smaller values for the resistor divider. r1 should be about 300k . to avoid a high leakage current from pin vout through the resistor divider to gnd, r1 should not be less than 100k .. to reduce the output ripple it?s also possible to speed up the feedback loop. to achieve this, place a 22pf (c4 in figure 24 ) capacitor in parallel to r1. via c4 the fast transients are shorted to the fb pin and the feedback loop is even faster. a 1m resistor for r1 slows down the fb loop. due to noise and to their non linear behavior, the use of potentiometers is not recommended. figure 24. as1329 - typical application for lower output voltage ripple note: for correct measurements of the output ripple connect the oscilloscope probe as close as possible to the positive plate of the c out and connect the gnd of the oscilloscope probe to the negative plate of the c out . this will reduce the inductive coupling and will deliver a more accurate measurement result. the output ripple is getting higher as v in is getting closer to v out . figure 25 shows that the above mentioned improvements reduce the output voltage ripple. if v in is higher than v out the as1329 stops switching and v in is connected to v out via the inductor and the internal p-fet. figure 25. output voltage ripple vs. input voltage; v out = 2.8v, i out = 0.8ma as1329 c 2 22f r 2 196k r 1 250k on off l1 4.7h 2xaa battery c 1 22f v out = 2.8v gnd 2 sw 1 4 shdnn 3 fb 5 vout c 3 22f c 4 22pf 6 vin 0 25 50 75 100 125 0.5 1 1.5 2 2.5 3 3.5 input voltage (v) output voltage ripple (mvpp) cout = 44f cout = 66f c o ut = 4 4 f + c 4 = 2 2 p f
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 13 - 21 as1329 datasheet - application information 9.2 smallest external components the as1329 is also able to work with smallest capacitors and inductors (see figure 26) . figure 26. as1329 - typical application for smallest external components figure 27. efficiency vs. output current with smallest external components table 5. recommended smallest components part number value code rating size manufacturer c1 grm188r61a225ke34 2.2f x5r 10v 0603 murata www.murata.com c2 grm188r60j475ke19 4.7f x5r 6.3v 0603 l1 lqm31pn2r2m00 2.2h 238m 0.9a 1206 as1329 c 2 4.7f r 2 k r 1 k on off l1 2.2h 2xaa battery c 1 2.2f v out = 5v gnd 2 sw 1 4 shdnn 3 fb 5 vout 6 vin 20 30 40 50 60 70 80 90 100 1 10 100 1000 output current (ma) efficiency (%) . vi n = 3. 3v vi n = 3. 5v vi n = 3. 8v
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 14 - 21 as1329 datasheet - application information 9.3 external component selection 9.3.1 inductor selection the fast switching frequency (1.2mhz) of the as1329 allows for the use of small surface mount or chip inductor for the external inductor (see figure 19 on page 8) . the required minimum values for the external inductor are: 3.3h for applications 3.6v 4.7h for applications > 3.6v larger inductor values allow greater output current capability by reducing the inductor ripple current. increasing the inductan ce above 10h will increase size while providing negligible improvement in output current capability. the approximate output current capability of the as1329 versus inductor value is given in: where: is the estimated efficiency; i p is the peak current limit value (0.6a); v in is the input voltage; d is the steady-state duty ratio = (v out - v in )/v out ; f is the switching frequency (1.2mhz typ); l is the inductor value. the inductor current ripple is typically set for 20 to 40% of the maximum inductor current (i p ). high-frequency ferrite core inductor materials reduce frequency dependent power losses compared to less expensive powdered iron types, which result in improved converter effi ciency. the inductor should have low esr to reduce the i2r power losses, and must be able to handle the peak inductor current without s aturating. molded chokes and some chip inductors normally do not have enough core to support the peak inductor currents of the as1329 (850 ma typ). to minimize radiated noise, use a toroid, pot core, or shielded bobbin inductor. table 6. recommended inductors part number l dcr current rating dimensions (l/w/t) manufacturer mos6020-103ml 10h 93m 1a 6.8x6.0x2.4mm coilcraft www.coilcraft.com mos6020-472ml 4.7h 50m 1.5a 6.8x6.0x2.4mm mos6020-332ml 3.3h 46m 1.8a 6.8x6.0x2.4mm cdrh4d18-100 10h 200m 0.61a 6.9x5.0x2.0mm sumida www.sumida.com cdrh4d18-6r8 6.8h 200m 0.76a 6.9x5.0x2.0mm cr43-6r8 6.8h 131.2m 0.95a 4.8x4.3x3.5mm cdrh4d18-4r7 4.7h 162m 0.84a 6.9x5.0x2.0mm (eq 2) i out max () i p v in d ? fl2 ?? ----------------- - ? ?? ?? 1d ? () ?? =
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 15 - 21 as1329 datasheet - application information figure 28. efficiency comparison of different inductors, v in = 1.5v, v out = 3.3v 9.3.2 output cap acitor selection low esr capacitors should be used to minimize v out ripple. multi-layer ceramic capacitors are recommended since they have extremely low esr and are available in small footprints. a 2.2 to 10f output capacitor is sufficient for most applications. larger values up to 22f may be used to obtain extremely low output voltage ripple and improve transient response. an additional phase lead capacitor may be required with output capacitors larger than 10f to maintain acceptable phase margin. x5r and x7r dielectric materials are recommended due to their ability to maintain capacitance over wide voltage and temperature ranges. input capacitor selection. low esr input capacitors reduce input switching noise and reduce the peak current drawn from the battery. ceramic capacitors are recommended for input decoupling and should be located as close to the device as is practical. a 4.7f i nput capacitor is sufficient for most applications. larger values may be used without limitations. diode selection. a schottky diode should be used to carry the output current for the time it takes the pmos synchronous rectifier to switch on. for v out < 4.5v a schottky diode is optional, although using one will increase device efficiency by 2% to 3%. note: do not use ordinary rectifier diodes, since the slow recovery times will compromise efficiency. table 7. recommended output capacitor part number c tc code rated voltage dimensions (l/w/t) manufacturer jmk212bj226mg-t 22f 2 0% x5r 6.3v 2x1.3x1.3mm taiyo yuden www.t-yuden.com table 8. recommended input capacitor part number c tc code rated voltage dimensions (l/w/t) manufacturer grm31cr70j106ka01l 10f 10% x7r 6.3v 3.2x1.6x1.6mm murata www.murata.com 100 10 76 78 80 82 84 86 88 90 92 output current (ma) efficiency (%) 10uh - coi l cr af t (m os6020-103m l) 10uh - sumi da(cdrh4d18-100) 6.8uh - sumida(cdrh4d18-6r8) 6.8uh - sumi da(cr43-6r8) 4.7uh - coi l cr af t(m os6020-472m l) 4.7 uh - sumi da(cdrh4d18-4r7) 3.3 uh - coi l cr af t(m os6020-332m l) 40 45 50 55 60 65 70 75 80 85 90 0.1 1 10 output current (ma) efficiency (%) 10uh - coi l cr af t (m os6020-103m l) 10uh - sumida(cdrh4d18-100) 6.8uh - sumi da(cdrh4d18-6r8) 6.8uh - sumi da(cr43-6r8) 4.7uh - coi l cr af t(m os6020-472m l) 4.7 uh - sumi da(cdrh4d18-4r7) 3.3 uh - coi l cr af t(m os6020-332ml)
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 16 - 21 as1329 datasheet - application information 9.4 pcb layout guidelines the high-speed operation of the as1329 requires proper layout for optimum performance. figure 29 shows the recommended component layout. a large ground pin copper area will help to lower the device temperature. a multi-layer board with a separate ground plane is recommended. traces carrying large currents should be direct. trace area at pin fb should be as small as is practical. the lead-length to the battery should be as short as is practical. figure 29. recommended single-layer component placement 1 as1329 2 3 6 5 4 optional shdnn v in fb v out gnd sw v out v in shdnn r 2 r 1 c out c in
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 17 - 21 as1329 datasheet - package drawings and markings 10 package drawin gs and markings the device is available in a 6-pin tsot-23 and 6-bump wl-csp package. figure 30. 6-pin tsot-23 package 6 7 3 4 3 4 a a
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 18 - 21 as1329 datasheet - package drawings and markings notes: 1. dimensioning and tolerancing conform to asme y14.5m - 1994. 2. dimensions are in millimeters. 3. dimension d does not include mold flash, protrusions, or gate burrs. mold flash, protrusions, and gate burrs shall not exce ed 0.15mm per end. dimension e1 does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.15mm per side. dimensions d and e1 are determined at datum h. 4. the package top can be smaller than the package bottom. dimensions d and e1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs, and interlead flash, but include any mistmatches between the t op of the package body and the bottom. d and e1 are determined at datum h. 5. datums a and b are to be determined at datum h. 6. these dimensions apply to the flat section of the lead between 0.08 and 0.15mm from the lead tip. 7. dimension b does not include dambar protrusion. allowable dambar protrusion shall be 0.08mm total in excess of the b dimens ion at the maximum material condition. the dambar cannot be located on the lower radius of the foot. minimum space between the protrusion and an adjacent lead shall not be less than 0.77mm. tolerances of form and position aaa 0.15 1,2 bbb 0.25 1,2 ccc 0.10 1,2 ddd 0.20 1,2 symbol min typ max notes a1.00 a1 0.01 0.05 0.10 a2 0.84 0.87 0.90 b 0.30 0.45 6,7 b1 0.31 0.35 0.39 6,7 c 0.12 0.15 0.20 6 c1 0.08 0.13 0.16 6 d 2.90bsc 3,4 e 2.80bsc 3,4 e1 1.60bsc 3,4 symbol min typ max notes e 0.95bsc e1 1.90bsc l 0.30 0.40 0.50 l1 0.60ref l2 0.25bsc n6 r0.10 r1 0.10 0.25 0o 4o 8o 1 4o 10o 12o
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 19 - 21 as1329 datasheet - package drawings and markings figure 31. 6-bump wl-csp package
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 20 - 21 as1329 datasheet - ordering information 11 ordering information the device is available as the standard products listed in table 9 . note: all products are rohs compliant. buy our products or get free samples online at icdirect: http://www.austriamicr osystems.com/icdirect technical support is found at http://www.austriamicrosyste ms.com/technical-support for further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicros ystems.com/distributor design the as1329 online at http://www.austriamicrosystems.com/analogbench analog bench is a powerful design and simulation support tool that operates in on-line and off-line mode to evaluate performance and generate application-specific bill-of-materials for austriamicrosystems' power management devices. table 9. ordering information ordering code marking description delivery form package as1329a-bttt aspa low voltage, micropower, dc-dc step-up converter with automatic powersave operation beginning at medium loads tape and reel 6-pin tsot-23 AS1329B-BTTT aspb low voltage, micropower, dc-dc step-up converter with automatic powersave operation beginning at light loads tape and reel 6-pin tsot-23 as1329c-bttt aspc low voltage, micropower, dc-dc step-up converter with continuous switching tape and reel 6-pin tsot-23 as1329a-bwlt tbd low voltage, micropower, dc-dc step-up converter with continuous switching tape and reel 6-bump wl-csp
www.austriamicrosystems.com/dc-dc_step-up/as1329 revision 1.11 21 - 21 as1329 datasheet copyrights copyright ? 1997-2010, austriamicrosystems ag, tobelbaderstrasse 30, 8141 unterpremstaetten, austria-europe. trademarks registe red ?. all rights reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. all products and companies mentioned are trademarks or registered trademarks of their respective companies. disclaimer devices sold by austriamicrosystems ag are covered by the warranty and patent indemnification provisions appearing in its term of sale. austriamicrosystems ag makes no warranty, express, statutory, implied, or by description regarding the information set forth he rein or regarding the freedom of the described devices from patent infringement. austriamicrosystems ag reserves the right to change specificatio ns and prices at any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with austriamic rosystems ag for current information. this product is intended for use in normal commercial applications. applications requiring extended temper ature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems ag for each application. for shipments of les s than 100 parts the manufacturing flow might show deviations from the st andard production flow, such as test flow or test location. the information furnished here by austriamicrosystems ag is believed to be correct and accurate. however, austriamicrosystems ag shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. no obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems ag rendering of technical or other services. contact information headquarters austriamicrosystems ag tobelbaderstrasse 30 a-8141 unterpremstaetten, austria tel: +43 (0) 3136 500 0 fax: +43 (0) 3136 525 01 for sales offices, distributors and representatives, please visit: http://www.austriamicrosystems.com/contact

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