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advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 1 of 14 v1.0 aat1343 details are subject to change without notice 2-channel switching regulator features z complete pwm power control circuitry z precision reference ?g 2.5v 1% (25 o c) z under-voltage lockout (uvlo) protection z open drain output z output short circuit protection z low dissipation current ?g 1.6ma z dead-time control ?g 0 % to 100% z wide operating frequency ?g 10khz to 800khz z dd vrange ?g 4.0v to 14.0v pin configuration 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 ie1 oe1 dtc1 gnd out1 v ref ne2 scp ie2 oe2 dtc2 out2 top view ne1 v dd tssop-16 package r t c t general description the aat1343 provides an integrated two-channel pulse-width-modulation (p wm) solution for the power supply of dc-dc syst em; this device offers the systems engineer flexibility to tailor-make the power supply circuitry fo r specific applications. each channel contains its own error amplifier, pwm comparator, dead?time control (dtc) and output driver. the under-voltage protection, oscillator, short circuit protection and voltage reference circuit are the common features for these two channels. both channels of aat1343 can be used for dc-dc converter operations includi ng step-up, step-down, and inverting. dead-time control can be set to provide 0% to 100% dead-time through a resistive divider network. soft-start can be implemented by paralleling the dtc resistor with a capacitor. two dead-time control inputs are assigned for channel 1 (ch1) and channel 2 (ch2) individually, and dead-time control inputs can be used to control on / off operation. with a minimal number of external components, the aat1343 offers a simple and cost effective solution.
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 2 of 14 v1.0 aat1343 pin description pin no. name i/o description 1 t c i external timing capacitor 2 t r i external timing resistor 3 ne1 i n oninverting input of error amplifier 1 4 ie1 i inverting input of error amplifier 1 5 oe1 i output of error amplifier 1 6 dtc1 i output 1 dead-time / soft-start setting 7 out1 o output 1 8 gnd ground 9 v dd i power supply 10 out2 o output 2 11 dtc2 i output 2 dead-time / soft-start setting 12 oe2 i output of error amplifier 2 13 ie2 i inverting input of error amplifier 2 14 ne2 i n oninverting input of error amplifier 2 15 scp i timer latch setting 16 ref v o reference voltage (2.5v) output
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 3 of 14 v1.0 aat1343 absolute maximum ratings characteristics symbol value unit supply voltage dd v 14.0 v input voltage ( ? ie , dtc) i v dd v v output voltage o v dd v +0.3 v output current o i 120 ma operating free-air temperature range c t 20 ? + o c storage temperature range storage t 45 ? + o c power dissipation d p 500 mw recommended operating conditions characteristics symbol min max unit supply voltage, dd v dd v 4.0 14.0 v input voltage at ie1 and ie2 cm v 0.5 1.6 v output voltage o v 0 dd v v oscillation (osc) capacitance osc c 100 15,000 pf oscillation (osc) resistance osc r 5.1 50.0 ? k oscillation (osc) frequency osc f 10 800 khz output current, 1 out i, 2 out i o i - 100 ma operating free-air temperature c t 20 ?
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 4 of 14 v1.0 aat1343 electrical characteristics, dd v = 6.0v (unless otherwise specified) (see note 1) oscillator parameter symbol test condition min typ max unit frequency osc f osc c = 220pf, osc r= 10 ? ? dd v = 4.0v to 14.0v, c t= 25 o c, osc c = 220pf, osc r= 10 ? under voltage protection parameter symbol test condition min typ max unit upper threshold voltage uph v c t= 25 o c 2.6 2.9 3.2 v lower threshold voltage upl v c t= 25 o c 2.23 2.53 2.83 v hysteresis ( uph v ? upl v) hys v c t= 25 o c - 0.37 - v short circuit protection control parameter symbol test condition min typ max unit input threshold voltage 1 r v ch1, ch2 0.95 1.05 1.15 v short-circuit detection threshold voltage 2 r v 1.48 1.64 1.80 v scp terminal source current scp i 5 . 3 ? ? 5 . 1 ? a
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 5 of 14 v1.0 aat1343 electrical characteristics, dd v = 6.0v (unless otherwise specified) (see note 1) (cont.) reference voltage parameter symbol test condition min typ max unit reference voltage ref v ma 1 i ref ? = , c t= 25 o c 2.480 2.505 2.530 v input voltage regulation ri v ma 1 i ref ? = , dd v = 4.0v to 14.0v - 1 5 mv output voltage regulation ro v ma 1 . 0 i ref ? = to 0 . 3 ? ea (error amplifier) parameter symbol test condition min typ max unit input offset voltage io v ch1, ch2, unity gain - - 6 mv input bias current ib i ch1, ch2 - 15 100 na input voltage range ir v ch1, ch2 0.5 - 1.6 v open-loop voltage gain vo a 70 85 - db + os v 2.3 2.5 - output voltage swing ? os v - 0.7 0.9 v output sink current + os i oe=1.25v 3 20 - ma output source current ? os i oe=1.25v 75 ? ? - a
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 6 of 14 v1.0 aat1343 electrical characteristics, dd v = 6.0v (unless otherwise specified) (see note 1) (cont.) dead-time control & pwm parameter symbol test condition min typ max unit input bias current ib i dtc v = 2.0v - 0.1 1.0 a ? ? output stage parameter symbol test condition min typ max unit saturation voltage sat v o i = 75ma ?] ch1, ch2 ?^ - 0.8 1.2 v leakage current leak i o v =14.0v - - 5 a operating current parameter symbol test condition min typ max unit off dd i ? output ?off? state - 1.3 1.8 ma supply current on dd i ? osc r=10 ?
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 7 of 14 v1.0 aat1343 block diagram scp uvlo oe1 ne1 ie1 ne2 ie2 oe2 dtc1 dtc2 scp uvc latch uvc uvc r t gnd c t latch pwm pwm uvc err-amp err-amp uvc osc scp comp out1 out2 dd v dd v ref v v ref v ref v ref v ref
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 8 of 14 v1.0 aat1343 application circuit
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 9 of 14 v1.0 aat1343 timing chart note: scp 2 r scp scp i v c t ? 1.64v 2.53v lockout free 1.97v 1.48v t scp 1.05v oe dtc pwm output output scp scp comp dd v
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 10 of 14 v1.0 aat1343 package dimension 16-pin tssop
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 11 of 14 v1.0 aat1343 package dimension (cont.) dimensions in millimeters deminsions in inches symbols min typ max min typ max a 1.05 1.10 1.20 0.041 0.043 0.047 a1 0.05 0.10 0.15 0.002 0.004 0.006 a2 ------ 1.00 1.05 ------ 0.039 0.041 b 0.20 0.25 0.28 0.008 0.010 0.011 c ------ 0.127 ------ ------ 0.005 ------ d 4.900 5.075 5.100 0.1930 0.1998 0.2000 e 6.20 6.40 6.60 0.244 0.252 0.260 e1 4.30 4.40 4.50 0.170 0.173 0.177 e ------ 0.65 ------ ------ 0.026 ------ l 0.50 0.60 0.70 0.020 0.024 0.028 y ------ ------ 0.076 ------ ------ 0.003 o 0 o 4 o 8 o 0 o 4 o 8 note: 1. controlling dimension: millimeters 2. lead frame material: olin c7025/eftec 64t 3. dimension ?d? does not include mold flash, tie bar burrs and gate burrs. mold flash, tie bar burrs and gate burrs shall not exceed 0.006? [0.15 millimeters] per end. dimension ?e1? does not include interlead flash. interlead flash shall not exceed 0.010? [0.25 millimeters] per side. 4. dimension ?b? does not include dambar protrusion. allowable dambar protrusion shall be 0.003? [0.08 millimeters] total in excess of the ?b? dimension at maximum material condition. dambar cannot be located on the lower radius or the foot. minimum space between protrusion and an adjacent lead to be 0.0028? [0.07 millimeters]. 5. tolerance: 0.010 [0.25 millimeters] unless otherwise specified. 6. otherwise dimension follow acceptable spec. 7. reference document: jedec spec mo-153.
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 12 of 14 v1.0 aat1343 tape and reel packing method: 2,500pcs/reel, 1 reel/box
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 13 of 14 v1.0 aat1343 tape and reel (cont.) note: 1. 10 sprocket hole pitch cumulative tolerance camber not to exceed 1 millimeter in 100 millimeters. 3. material: anti-static black advantek polystyrene. 4. 0 a and 0 b measured on a plane 0.3 millimeters above the bottom of the pocket. 5. 0 k measured from a plane on the inside bottom of the pocket to the top surface of the carrier. 6. pocket position relative to sprocket hole measured as true position of pocket, not pocket hole. part marking tssop16 top marking aat1343 xxxxxx tssop16 back marking yyww
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 14 of 14 v1.0 aat1343 ordering information

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