View LT3465ES6PBF_3821780.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

lt3465/lt3465a 1 3465afa , ltc and lt are registered trademarks of linear technology corporation. thinsot is a trademark of linear technology corporation. all other trademarks are the property of their respective owners. applicatio s u features typical applicatio u descriptio u inherently matched led current drives up to six leds from a 3.6v supply no external schottky diode required 1.2mhz switching frequency (lt3465) 2.4mhz switching frequency above am broadcast band (lt3465a) v in range: 2.7v to 16v v out(max) = 30v automatic soft-start (lt3465) open led protection high efficiency: 81% (lt3465) 79% (lt3465a) typical requires only 0.22 f output capacitor low profile (1mm) sot-23 1.2mhz/2.4mhz white led drivers with built-in schottky in thinsot cellular phones pdas, handheld computers digital cameras mp3 players gps receivers the lt ? 3465/lt3465a are step-up dc/dc converters designed to drive up to six leds in series from a li-ion cell. series connection of the leds provides identical led currents and eliminates the need for ballast resistors. these devices integrate the schottky diode required exter- nally on competing devices. additional features include output voltage limiting when leds are disconnected, one- pin shutdown and dimming control. the lt3465 has internal soft-start. the lt3465 switches at 1.2mhz, allowing the use of tiny external components. the faster lt3465a switches at 2.4mhz. constant frequency switching results in low input noise and a small output capacitor. just 0.22 f is required for 3-, 4- or 5-led applications. the lt3465 and lt3465a are available in the low profile (1mm) 6-lead sot-23 (thinsot tm ) package. figure 1. li-ion powered driver for four white leds sw v out v in lt3465/ lt3465a ctrl 3465a f01a 10 ? c1 1 f c2 0.22 f c1, c2: x5r or x7r dielectric l1: murata lqh32cn220 l1 22 h 3v to 5v shutdown and dimming control fb gnd led current (ma) 0 efficiency (%) 78 80 20 3465a f01b 76 60 70 68 66 64 62 72 74 5 10 15 82 v in = 3.6v 4 leds lt3465 lt3465a conversion efficiency
lt3465/lt3465a 2 3465afa v out 1 gnd 2 top view s6 package 6-lead plastic tsot-23 fb 3 6 sw 5 v in 4 ctrl input voltage (v in ) ................................................. 16v sw voltage ............................................................. 36v fb voltage ................................................................ 2v ctrl voltage .......................................................... 10v operating temperature range (note 2) .. C 40 c to 85 c maximum junction temperature ......................... 125 c storage temperature range ................ C 65 c to 150 c lead temperature (soldering, 10 sec)................. 300 c (note 1) absolute axi u rati gs w ww u the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v in = 3v, v ctrl = 3v, unless otherwise noted. lt3465 lt3465a parameter conditions min typ max min typ max units minimum operating voltage 2.7 2.7 v maximum operating voltage 16 16 v feedback voltage 0 c t a 85 c 188 200 212 188 200 212 mv fb pin bias current 10 35 100 10 35 100 na supply current not switching 1.9 2.6 3.3 1.9 2.6 3.3 ma ctrl = 0v 2.0 3.2 5.0 2.0 3.2 5.0 a switching frequency 0.8 1.2 1.6 1.8 2.4 2.8 mhz maximum duty cycle 90 93 90 93 % switch current limit 225 340 225 340 ma switch v cesat i sw = 250ma 300 300 mv switch leakage current v sw = 5v 0.01 5 0.01 5 a v ctrl for full led current 1.8 1.8 v v ctrl to enable chip 150 150 mv v ctrl to shut down chip 50 50 mv ctrl pin bias current 48 60 72 48 60 72 a t a = 85 c 405060405060 a t a = C40 c 607590607590 a soft-start time 600 s schottky forward drop i d = 150ma 0.7 0.7 v schottky leakage current v r = 30v 4 4 a electrical characteristics note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired. note 2: the lt3465e/lt3465ae are guaranteed to meet performance specifications from 0 c to 70 c. specifications over the C40 c to 85 c operating temperature range are assured by design, characterization and correlation with statistical process controls. t jmax = 125 c, ja = 256 c/w in free air ja = 120 c on board over ground plane order part number s6 part marking package/order i for atio uu w consult ltc marketing for parts specified with wider operating temperature ranges. lt3465es6 lt3465aes6 lth2 ltaft order options tape and reel: add #tr lead free: add #pbf lead free tape and reel: add #trpbf lead free part marking: http://www.linear.com/leadfree/
lt3465/lt3465a 3 3465afa schottky forward drop (mv) 0 0 schottky forward current (ma) 50 100 150 200 300 200 400 600 800 3465a g02 1000 1200 250 t a = 25 c typical perfor a ce characteristics uw switch saturation voltage (v cesat ) schottky forward voltage drop shutdown quiescent current (ctrl = 0v) switch current (ma) 0 0 switch saturation voltage (mv) 50 150 200 250 200 450 3465a g01 100 100 50 250 300 150 350 300 350 400 t a = 25 c v in (v) 2 i q ( a) 12 15 18 8 14 3465a g03 9 6 3 0 4 6 10 12 21 24 27 30 16 t a = 25 c v fb vs v ctrl open-circuit output clamp voltage control voltage (v) 0 feedback voltage (mv) 100 150 2 3465a g04 50 0 0.5 1 1.5 250 200 t a = 25 c input voltage (v) 2 20 25 35 812 3465a g05 15 10 46 10 14 16 5 0 30 output clamp voltage (v) t a = 25 c input current in output open circuit switching waveforms (lt3465) input voltage (v) 2 2.5 0 input current (ma) 2 5 3 4 4.5 3465a g06 1 4 3 3.5 5 t a = 25 c v sw 10v/div i l 100ma/div v out 100mv/div v in = 3.6v 200ns/div 3465a g07a 4 leds 20ma, 22 h temperature ( c) C50 4365a g08 0 50 100 switching frequency (mhz) 3.0 2.5 2.0 1.5 1.0 0.5 0 lt3465 lt3465a switching frequency switching waveforms (lt3465a) v sw 10v/div i l 50ma/div v out 50mv/div v in = 3.6v 100ns/div 3465a g07b 4 leds 20ma, 22 h
lt3465/lt3465a 4 3465afa typical perfor a ce characteristics uw quiescent current (ctrl = 3v) v in (v) 0 0 i q (ma) 0.5 1.0 1.5 2.0 2.5 3.0 5101520 3465a g10 C50 c 25 c 100 c duty cycle (%) 0 current limit (ma) 150 200 250 60 100 3465a g11 100 50 0 20 40 80 300 350 400 C50 c 25 c 100 c temperature ( c) C50 efficiency (%) 70 75 3465a g12 65 60 0 50 100 85 20ma 80 10ma 15ma lt3465 lt3465a switching current limit v in = 3.6v, 4 leds temperature ( c) C50 schottky leakage current ( a) 3 4 v r = 25 v r = 16 v r = 10 5 3465a g13 2 1 0 050 6 7 8 100 schottky leakage current temperature ( c) C50 190 feedback voltage (mv) 192 196 198 200 210 204 C10 30 50 3465a g09 194 206 208 202 C30 10 70 90 feedback voltage
lt3465/lt3465a 5 3465afa uu u pi fu ctio s v out (pin 1): output pin. connect to output capacitor and leds. minimize trace between this pin and output capaci- tor to reduce emi. gnd (pin 2): ground pin. connect directly to local ground plane. fb (pin 3): feedback pin. reference voltage is 200mv. connect leds and a resistor at this pin. led current is determined by the resistance and ctrl pin voltage: ctrl (pin 4): dimming control and shutdown pin. ground this pin to shut down the device. when v ctrl is greater than about 1.8v, full-scale led current is generated. when v ctrl is less than 1v, led current is reduced. floating this pin places the device in shutdown mode. v in (pin 5): input supply pin. must be locally bypassed with a 1 f x5r or x7r type ceramic capacitor. sw (pin 6): switch pin. connect inductor here. i r mv mv n mv mv led fb = ? ? ? ? ? ? 1 200 26 1 200 26 ?C? exp ex pp ? vmv mv mv ctrl () ? ? ? ? ? ? + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 526 1 ?? ? ? ? ? ? ? ? > for v mv ctrl 150
lt3465/lt3465a 6 3465afa block diagra w C + + C + rq s 0.2 ? sw driver comparator 2 ctrl 4 6 v out v in 3 fb 200mv 5 C + ramp generator overvoltage protect r c 10k 40k c c 1.2mhz* oscillator *2.4mhz for lt3465a gnd 3465a f02 q1 a2 a1 v ref 1.25v 1 figure 2. lt3465 block diagram
lt3465/lt3465a 7 3465afa applicatio s i for atio wu uu operation the lt3465 uses a constant frequency, current mode control scheme to provide excellent line and load regula- tion. operation can be best understood by referring to the block diagram in figure 2. at the start of each oscillator cycle, the sr latch is set, which turns on the power switch q1. a voltage proportional to the switch current is added to a stabilizing ramp and the resulting sum is fed into the positive terminal of the pwm comparator a2. when this voltage exceeds the level at the negative input of a2, the sr latch is reset turning off the power switch. the level at the negative input of a2 is set by the error amplifier a1, and is simply an amplified version of the difference between the feedback voltage and the reference voltage of 200mv. in this manner, the error amplifier sets the correct peak current level to keep the output in regulation. if the error amplifiers output increases, more current is delivered to the output; if it decreases, less current is delivered. the ctrl pin voltage is used to adjust the reference voltage. the block diagram for the lt3465a (not shown) is identical except that the oscillator frequency is 2.4mhz. minimum output current t he lt3465 can drive a 3-led string at 1.5ma led current without pulse skipping. as current is further reduced, the device will begin skipping pulses. this will result in some low frequency ripple, although the led current remains regulated on an average basis down to zero. the photo in figure 3a details circuit operation driving three white leds at a 1.5ma load. peak inductor current is less than 40ma and the regulator operates in discontinuous mode, meaning the inductor current reaches zero during the discharge phase. after the induc- tor current reaches zero, the sw pin exhibits ringing due to the lc tank circuit formed by the inductor in combina- tion with switch and diode capacitance. this ringing is not harmful; far less spectral energy is contained in the ringing than in the switch transitions. the ringing can be damped by application of a 300 ? resistor across the inductor, although this will degrade efficiency. because of the higher switching frequency, the lt3465a can drive a 3-led string at 0.2ma led current without pulse v sw 5v/div i l 20ma/div v out 10mv/div v in = 4.2v 0.2 s/div 3465a f03a i led = 1.5ma 3 leds figure 3b. switching waveforms (lt3465a) v sw 5v/div i l 20ma/div v out 10mv/div v in = 4.2v 0.1 s/div 3465a f03b i led = 0.2ma 3 leds figure 3a. switching waveforms (lt3465)
lt3465/lt3465a 8 3465afa skipping using a 1k resistor from fb to gnd. the photo in figure 3b details circuit operation driving three white leds at a 0.2ma load. peak inductor current is less than 30ma. inductor selection a 22 h inductor is recommended for most lt3465 appli- cations. although small size and high efficiency are major concerns, the inductor should have low core losses at 1.2mhz and low dcr (copper wire resistance). some inductors in this category with small size are listed in table 1. the efficiency comparison of different inductors is shown in figure 4a. a 22 h or 10 h inductor is recom- mended for most lt3465a applications. the inductor should have low core losses at 2.4mhz and low dcr. the efficiency comparison of different inductors is shown in figure 4b. table 1. recommended inductors part current rating number dcr ( ? ) (ma) manufacturer lqh32cn220 0.71 250 murata lqh2mcn220 2.4 185 814-237-1431 www.murata.com eljpc220kf 4.0 160 panasonic 714-373-7334 www.panasonic.com cdrh3d16-220 0.53 350 sumida 847-956-0666 www.sumida.com lb2012b220m 1.7 75 taiyo yuden 408-573-4150 www.t-yuden.com lem2520-220 5.5 125 taiyo yuden 408-573-4150 www.t-yuden.com led current (ma) 0 70 75 15 3465a f04b 65 60 510 20 55 50 80 efficiency (%) v in = 3.6v 4 leds murata lqh32cn220 murata lqh32cn100 murata lqh2mcn220 toko d312-220 toko d312-100 taiyo yuden lb2012b220 applicatio s i for atio wu uu capacitor selection the small size of ceramic capacitors makes them ideal for lt3465 and lt3465a applications. x5r and x7r types are recommended because they retain their capacitance over wider voltage and temperature ranges than other types such as y5v or z5u. a 1 f input capacitor and a 0.22 f output capacitor are sufficient for most lt3465 and lt3465a applications. table 2. recommended ceramic capacitor manufacturers manufacturer phone url taiyo yuden 408-573-4150 www.t-yuden.com murata 814-237-1431 www.murata.com kemet 408-986-0424 www.kemet.com led current (ma) 0 70 75 85 15 3465a f04b 65 60 510 20 55 50 80 efficiency (%) murata lqh32cn220 taiyo yuden lb2012b220m taiyo yuden cb2012b220 v in = 3.6v 4 leds figure 4a. efficiency comparison of different inductors (lt3465) figure 4b. efficiency comparison of different inductors (lt3465a)
lt3465/lt3465a 9 3465afa applicatio s i for atio wu uu inductors, which is usually the case for this application, the peak inrush current can be simplified as follows: i v l p in = ? ? ? ? ? ? C. ? ? exp C ? 06 2 table 3 gives inrush peak currents for some component selections. table 3. inrush peak current v in (v) r ( ? )l ( h) c ( f) i p (a) 5 0.5 22 0.22 0.38 5 0.5 22 1 0.70 3.6 0.5 22 0.22 0.26 5 0.5 33 1 0.60 led current and dimming control the led current is controlled by the feedback resistor (r1 in figure 1) and the feedback reference voltage. i led = v fb /r fb the ctrl pin controls the feedback reference voltage as shown in the typical performance characteristics. for ctrl higher than 1.8v, the feedback reference is 200mv, which results in full led current. ctrl pin can be used as dimming control when ctrl voltage is between 200mv to 1.5v. in order to have accurate led current, precision resistors are preferred (1% is recommended). the for- mula and table for r fb selection are shown below. r fb = 200mv/i led-full (1) table 4. r fb resistor value selection full i led (ma) r1 ( ? ) 5 40.0 10 20.0 15 13.3 20 10.0 the filtered pwm signal can be considered to be an adjustable dc voltage. it can be used to adjust the ctrl voltage source in dimming control. the circuit is shown in figure 6. the corner frequency of r1 and c1 should be i in 50ma/div v in = 3.6v 200 s/div 3465 f05 4 leds, 20ma l = 22 h c = 0.22 f v out 5v/div v fb 100mv/div ctrl 5v/div figure 5. start-up waveforms inrush current the lt3465 and lt3465a have a built-in schottky diode. when supply voltage is applied to the v in pin, the voltage difference between v in and v out generates inrush current flowing from input through the inductor and the schottky diode to charge the output capacitor to v in . the maximum current the schottky diode in the lt3465 and lt3465a can sustain is 1a. the selection of inductor and capacitor value should ensure the peak of the inrush current to be below 1a. the peak inrush current can be calculated as follows: i v l r l lc r l p in = ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = + = + () C. ? ? exp C ? arctan ? sin arctan . ? ? C . ? 06 15 2 1 15 4 2 2 where l is the inductance, r is the resistance of the inductor and c is the output capacitance. for low dcr soft-start (lt3465) the lt3465 has an internal soft-start circuit to limit the input current during circuit start-up. the circuit start-up waveforms are shown in figure 5.
lt3465/lt3465a 10 3465afa lower than the frequency of the pwm signal. r1 needs to be much smaller than the internal impedance in the ctrl pin, which is 50k ? . a 5k resistor is suggested. percent duty cycle sets the led current to zero, while 100% duty cycle sets it to full current. average led current increases proportionally with the duty cycle of the pwm signal. with the pwm signal at the ctrl pin to turn the lt3465a on and off, the output capacitor is charged and discharged accordingly. this capacitor charging/ discharging affects the waveform at the fb pin. for low pwm frequencies the output capacitor charging/discharg- ing time is a very small portion in a pwm period. the average fb voltage increases linearly with the pwm duty cycle. as the pwm frequency increases, the capacitor charging/discharging has a larger effect on the linearity of the pwm control. waveforms for a 1khz and 10khz pwm ctrl signals are shown in figures 7a and 7b respectively. the capacitor charging/discharging has a larger effect on the fb waveform in the 10khz case than that in the 1khz applicatio s i for atio wu uu figure 7a. figure 7b. fb 100mv/div ctrl 2v/div 200 s/div (1khz) 3465a f07a fb 100mv/div ctrl 2v/div 20 s/div (10khz) 3465a f07b lt3465a ctrl pwm dimming using direct pwm (lt3465a) unlike the lt3465, the lt3465a does not have internal soft-start. although the input current is higher during start-up, the absence of soft-start allows the ctrl pin to be directly driven with a pwm signal for dimming. a zero lt3465/ lt3465a ctrl 3465a f06 pwm c1 100nf r1 5k figure 6. dimming control using a filtered pwm signal
lt3465/lt3465a 11 3465afa ctrl pwm duty cycle (%) 0 average feedback voltage (mv) 200 180 160 140 120 100 80 60 40 20 0 80 3465a f07f 20 40 60 100 4 leds 3 leds 2 leds 30khz pwm c out = 0.22 f ctrl pwm duty cycle (%) 0 average feedback voltage (mv) 200 180 160 140 120 100 80 60 40 20 0 80 3465a f07d 20 10 30 50 70 90 40 60 100 30khz 10khz 1khz 100hz 10hz c out = 0.47 f 4 leds ctrl pwm duty cycle (%) 0 average feedback voltage (mv) 200 180 160 140 120 100 80 60 40 20 0 80 3465a f07c 20 40 60 100 30khz 10khz 1khz 100hz 10hz c out = 0.22 f 4 leds ctrl pwm duty cycle (%) 0 average feedback voltage (mv) 200 180 160 140 120 100 80 60 40 20 0 80 3465a f07e 20 40 60 100 4 leds 3 leds 2 leds 10khz pwm c out = 0.22 f figure 7e.v fb vs ctrl pwm duty cycle figure 7f.v fb vs ctrl pwm duty cycle applicatio s i for atio wu uu figure 7c. v fb vs ctrl pwm duty cycle figure 7d. v fb vs ctrl pwm duty cycle case. the average fb voltage vs pwm duty cycle curves of different pwm frequencies with different output ca- pacitors are shown in figures 7c and 7d respectively. for pwm frequency lower than 1khz, the curves are almost linear. for pwm frequency higher than 10khz, the curves show strong nonlinearity. since the cause of the nonlinearity is the output capacitor charging/discharg- ing, the output capacitance and output voltage also affect the nonlinearity in the high pwm frequencies. because smaller capacitance corresponds to shorter capacitor charging/discharging time, the smaller output capaci- tance has better linearity as shown in figures 7c and 7d. figures 7e and 7f show the output voltages effect to the curves. the pwm signal should be at least 1.8v in magnitude; lower voltage will lower the feedback voltage as shown in equation 1.
lt3465/lt3465a 12 3465afa applicatio s i for atio wu uu figure 9. open-circuit protection the lt3465 and lt3465a have an internal open-circuit protection circuit. in the cases of output open circuit, when the leds are disconnected from the circuit or the leds fail, the v out is clamped at 30v. the lt3465 and lt3465a will then switch at a very low frequency to minimize the input current. v out and input current during output open circuit are shown in the typical performance characteristics. board layout consideration as with all switching regulators, careful attention must be paid to the pcb board layout and component placement. to maximize efficiency, switch rise and fall times are made as short as possible. to prevent electromagnetic interference (emi) problems, proper layout of the high frequency switching path is essential. place c out next to the v out and gnd pins. always use a ground plane under the switching regulator to minimize interplane coupling. in addition, the ground connection for the feedback resistor r1 should be tied directly to the gnd pin and not shared with any other component, ensuring a clean, noise- free connection. recommended component placement is shown in figure 8. start-up input current (lt3465a) as previously mentioned, the lt3465a does not have an internal soft-start circuit. inrush current can therefore rise to approximately 400ma as shown in figure 9 when driving 4 leds. the lt3465 has an internal soft-start circuit and is recommended if inrush current must be minimized. figure 8. recommended component placement. 1 c out l r fb 2 3 6 5 4 c in gnd 3465a f08a v in ctrl fb 200mv/div ctrl 2v/div 50 s/div 3465a f09 i in 200mv/div
lt3465/lt3465a 13 3465afa typical applicatio s u li-ion to two white leds sw v out v in lt3465/ lt3465a ctrl 3465a ta01a r1 4 ? c in 1 f c out 1 f c in : taiyo yuden jmk107bj105 c out : avx 0603zd105 l1: murata lqh32cn220 l1 22 h 3v to 5v fb gnd led current (ma) 0 efficiency (%) 75 80 85 40 3465a ta01b 70 65 60 55 50 10 20 30 50 v in = 3.6v 2 leds lt3465 lt3465a sw v out v in lt3465/ lt3465a ctrl 3465a ta02a r1 10 ? c in 1 f c out 0.22 f l1 22 h 3v to 5v fb gnd c in : taiyo yuden jmk107bj105 c out : avx 0603yd224 l1: murata lqh32cn220 li-ion to three white leds led current (ma) 0 efficiency (%) 75 80 85 3465a ta02b 70 65 60 55 50 5 10 15 20 v in = 3.6v 3 leds lt3465 lt3465a
lt3465/lt3465a 14 3465afa typical applicatio u li-ion to five white leds sw v out v in lt3465/ lt3465a ctrl 3465a ta03a r1 10 ? c in 1 f c out 0.22 f l1 22 h 3v to 5v fb gnd c in : taiyo yuden jmk107bj105 c out : taiyo yuden gmk212bj224 l1: murata lqh32cn220 led current (ma) 0 efficiency (%) 75 85 80 3465a ta03b 70 65 60 55 50 5 10 15 20 v in = 3.6v 5 leds lt3465 lt3465a
lt3465/lt3465a 15 3465afa u package descriptio s6 package 6-lead plastic tsot-23 (reference ltc dwg # 05-08-1636) 1.50 C 1.75 (note 4) 2.80 bsc 0.30 C 0.45 6 plcs (note 3) datum a 0.09 C 0.20 (note 3) s6 tsot-23 0302 2.90 bsc (note 4) 0.95 bsc 1.90 bsc 0.80 C 0.90 1.00 max 0.01 C 0.10 0.20 bsc 0.30 C 0.50 ref pin one id note: 1. dimensions are in millimeters 2. drawing not to scale 3. dimensions are inclusive of plating 4. dimensions are exclusive of mold flash and metal burr 5. mold flash shall not exceed 0.254mm 6. jedec package reference is mo-193 3.85 max 0.62 max 0.95 ref recommended solder pad layout per ipc calculator 1.4 min 2.62 ref 1.22 ref
lt3465/lt3465a 16 3465afa linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com ? linear technology corporation 2005 lt/lt 0805 rev a ? printed in usa related parts part number description comments lt1618 constant current, constant voltage, 1.4mhz, high efficiency up to 16 white leds, v in : 1.6v to 18v, v out(max) : 34v, i q : 1.8ma, boost regulator i shdn : <1 a, 10-lead ms package lt1932 constant current, 1.2mhz, high efficiency white led up to 8 white leds, v in : 1v to 10v, v out(max) : 34v, i q : 1.2ma, boost regulator i shdn : <1 a, thinsot package lt1937 constant current, 1.2mhz, high efficiency white led up to 4 white leds, v in : 2.5v to 10v, v out(max) : 34v, i q : 1.9ma, boost regulator i shdn : <1 a, thinsot ltc ? 3200-5 low noise, 2mhz, regulated charge pump white led driver up to 6 white leds, v in : 2.7v to 4.5v, i q : 8ma, i shdn : <1 a, thinsot package ltc3202 low noise, 1.5mhz, regulated charge pump white led driver up to 8 white leds, v in : 2.7v to 4.5v, i q : 5ma, i shdn : <1 a, 10-lead ms package ltc3205 multi-display led controller 92% efficiency, v in : 2.8v to 4.5v, i q : 4.2ma, i sd : <1 a, drives main, sub, rgb, qfn package ltc3405 300ma (i out ), 1.5mhz synchronous step-down 95% efficiency, v in : 2.7v to 6v, v out(min) : 0.8v, i q : 20 a, i shdn : <1 a, ltc3405a dc/dc converter thinsot package ltc3406 600ma (i out ), 1.5mhz synchronous step-down 95% efficiency, v in : 2.5v to 5.5v, v out(min) : 0.6v, i q : 20 a, ltc3406b dc/dc converter i shdn : <1 a, thinsot package ltc3407 dual 600ma (i out ), 1.5mhz synchronous step-down 95% efficiency, v in : 2.5v to 5.5v, v out(min) : 0.6v, i q : 40 a, dc/dc converters i shdn : <1 a, ms10e, dfn package ltc3411 1.25a (i out ), 4mhz synchronous step-down dc/dc converter 95% efficiency, v in : 2.5v to 5.5v, v out(min) : 0.8v, i q : 60 a, i shdn : <1 a, ms10, dfn package ltc3412 2.5a (i out ), 4mhz synchronous step-down dc/dc converter 95% efficiency, v in : 2.5v to 5.5v, v out(min) : 0.8v, i q : 60 a, i shdn : <1 a, tssop16e package ltc3440/ 600ma/1.2a (i out ), 2mhz/1mhz synchronous buck-boost 95% efficiency, v in : 2.5v to 5.5v, v out(min) : 2.5v, i q : 25 a, ltc3441 dc/dc converter i shdn : <1 a, 10-lead ms package lt3466 full function white led step-up converter with drives up to 20 leds, independent step-up converters, built-in schottkys v in : 2.7 v to 24v, dfn package typical applicatio u li-ion to six white leds sw v out v in lt3465/ lt3465a ctrl 3465a ta04a r1 10 ? c in 1 f c out 0.47 f l1 47 h/22 h 3v to 5v fb gnd c in : taiyo yuden jmk107bj105 c out : taiyo yuden gmk212bj474 l1: murata lqh32cn470 (lt3465) l1: murata lqh32cn220 (lt3465a) led current (ma) 0 efficiency (%) 75 85 80 3465a ta04b 70 65 60 55 50 5 10 15 20 v in = 3.6v 6 leds lt3465 lt3465a

▲Up To Search▲

Price & Availability of LT3465ES6PBF

	To Download LT3465ES6PBF Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .