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advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 1 of 16 v 1.0 aat1105 a details are subject to change without notice. buck_boost & boost pwm controller features z complete pwm power control circuitry ch1: buck_boost, ch2: boost z under-voltage lockout (uvlo) protection z totem pole output z output short circuit protection z dead-time control ?g 0% to 100% z wide operating frequency ?g 10khz to 800khz z shutdown control z power good protection z dd v range: 2.6v~6.5v pin configuration 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 c t r t ie1 oe1 dtc1 gnd out1 v ref pgo scp ie2 oe2 dtc2 out2 top view (tssop-16 package) shdn v dd general description the AAT1105A provides an integrated two-channel pulse-width-modulation (p wm) solution for the power supply of dc-dc system. this device offers system engineers the flexibility to tailor-make the power supply circuitry for 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 (scp) and voltage reference circuit are the common features for the two channels. the AAT1105A contains one step-up (boost) circuit at channel two (ch2) and one inverting (buck_boost) circuit at channel one (ch1). 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 ch1 and ch2 individually, and dead-time control inputs can be used to control on / off operation. the compact design and optimized external parts of AAT1105A offers a simple and effective solution.
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 2 of 16 v 1.0 aat1105 a pin description pin no name i/o description 1 t c - external timing capacitance 2 t r - external timing resistance 3 shdn i shutdown input pin ?] internal pull "h" ?^ 4 ie1 i inverting input of error amplifier 1 5 oe1 o output for error amplifier 1 6 dtc1 i output 1 dead-time / soft-start setting 7 out1 o output 1 8 gnd - ground 9 v dd - power supply 10 out2 o output 2 11 dtc2 i output 2 dead-time / soft-start setting 12 oe2 o output of error amplifier 2 13 ie2 i inverting input of error amplifier 2 14 pgo o power good output pin 15 scp - timer latch setting 16 ref v o reference voltage (1.293v) output
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 3 of 16 v 1.0 aat1105 a absolute maximum ratings characteristics symbol value unit supply voltage dd v 7 v input voltage ( ? ie , dtc, shdn) i v dd v v output voltage o v dd v +0.3 v output current o i 120 ? ? ? recommended operating conditions symbol min max unit supply voltage, dd v dd v 2.6 6.5 v input voltage, ie1, ie2 cm v 0.3 1.5 v output voltage o v 0 dd v v oscillator (osc) capacitance osc c 100 15,000 pf oscillator (osc) resistance osc r 3 50 k [ oscillator (osc) frequency osc f 10 800 khz output current, 1 out i, 2 out i o i +50/ 50 ? 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 16 v 1.0 aat1105 a electrical characteristics, dd v = 3.3v (unless otherwise specified) (see note 1) oscillator parameter test condition min typ max unit frequency osc f osc c = 220pf, osc r= 5.6k [ 320 400 480 khz frequency changes with dd v v f ? dd v = 2.6v to 6.0v, c t= 25 o c osc c = 220pf, osc r = 5.6k [ - 1 - % under-voltage protection parameter test condition min typ max unit upper threshold voltage uph v c t= 25 o c 1.81 2.03 2.25 v lower threshold voltage upl v c t= 25 o c 1.57 1.79 2.01 v hysteresis ( uph v ? upl v) hys v c t= 25 o c - 0.24 - v short circuit protection control parameter test condition min typ max unit input threshold voltage 2 r v ch2 1.81 1.29 1.40 v input threshold voltage 1 r v ch1 0.30 0.37 0.44 v short-circuit detect threshold voltage tscd v 0.76 0.85 0.94 v scp terminal source current scp i 8 . 3 ? ? 4 . 1 ? a stand-by voltage v stb 50 100 mv latch voltage v lt 30 100 mv shutdown control parameter test condition min typ max unit shutdown enable voltage se v c t= 25 o c - - 0.5 v shutdown release voltage sr v c t= 25 o c 2.0 - - v note 1: typical values of a ll parameters are specified at c t=25 o c.
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 5 of 16 v 1.0 aat1105 a electrical characteristics, dd v = 3.3v (unless otherwise specified) (see note 1) (cont.) reference voltage parameter test conditions min typ max unit internal reference voltage refi v ma 1 i ref ? = , c t= 25 o c 0.622 0.641 0.660 reference voltage ref v ma 1 i ref ? = , c t= 25 o c 1.280 1.293 1.306 v input voltage regulation ri v ma 1 i ref ? = , v dd = 2.6v to 6.0v - 1 10 mv output regulation ro v ma 1 . 0 i ref ? = to 1 ? ea (error amplifier) parameter 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 - 1.5 v open-loop voltage amplification vo a 70 85 - db + os v 1.7 2.0 - output voltage swing ? os v - 0.2 0.4 v output sink current + os i oe=0.65v 3 10 - ma output source current ? os i oe=0.65v - 65 ? 45 ? a common-mode rejection ratio cmrr 60 80 - db prdb (power good protection) parameter test condition min typ max unit low level output voltage dbl v pull-high ? = k 100 r 20 - 0.2 0.4 v
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 6 of 16 v 1.0 aat1105 a electrical characteristics, dd v = 3.3v (unless otherwise specified) (see note 1) (cont.) dead time control & pwm parameter test condition min typ max unit input bias current ib i dtc v = 1.0v - 0.1 1.0 a 0 d 1 v duty = 0%, osc f = 10khz 0.92 1.00 1.08 input threshold voltage (dtc1) 100 d 1 v duty = 100%, osc f = 10khz 0.48 0.56 0.64 v 0 d 2 v duty = 0%, osc f = 10khz 0.48 0.56 0.64 input threshold voltage (dtc2) 100 d 2 v duty = 100%, osc f = 10khz 0.92 1.00 1.08 v latch input voltage (dtc1) dtc 1 v dtc i = 20a 1.15 1.20 - v latch input voltage (dtc2) dtc 2 v dtc i = 50a - 0.2 0.4 v latch mode source current (dtc1) dtc 1 i dtc1=1.08v - 45 ? 30 ? a latch mode source current (dtc2) dtc 2 i dtc2=0.48v 150 200 - a output stage parameter test condition min typ max unit high-level output voltage oh v o i= 50 ? operating current parameter test condition min typ max unit off dd i ? output ?off? state - 1.8 - ma supply current on dd i ? ? = k 10 r osc - 2.0 - ma
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 7 of 16 v 1.0 aat1105 a block diagram scp v ref uvlo oe1 ie1 ie2 oe2 dtc1 dtc2 scp uvc latch uvc uvc v ref v ref v ref v dd r t gnd c t latch pwm pwm uvc err-amp err-amp uvc osc v dd scp comp v ref i 1.233v v r2 v r1 shutdown control shdn pgo v ref i 1.233v out2 v dd out1 v dd
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 8 of 16 v 1.0 aat1105 a application circuit 1 AAT1105A out1 out2 v dd v dd oe1 ie1 oe2 ie2 ct r t gnd scp dtc2 dtc1 v ref vn1 r1 r2 v ref r5 c1 r6 c2 vp2 r3 r4 c t r t c scp pgo shdn shdn r8 r10 c5 r9 r7 c4 q1 vn1 d1 c9 l1 q2 l2 c11 u1 vp2 d2 c10 c20
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 9 of 16 v 1.0 aat1105 a application circuit 2 aat1105 out1 out2 v dd v dd oe1 ie1 oe2 ie2 c t r t gnd scp dtc2 dtc1 v ref vn1 r1 r2 v ref r5 c1 r6 c2 vp2 r3 r4 ct r t c scp pgo optional circuit 3: for power good protection q3 r20 shdn shdn optional circuit 2: for vp3 discharge r8 r10 c5 r9 r7 c4 q1 vn1 d1 c9 l1 q2 l2 c11 pgo u1 c8 d3 d4 c7 vp3 vp2 d2 c10 optional circuit: positive charge pump circuit r11 pgo r12 q4 c13 d6 d5 c14 vn2 optional circuit : negative charge pump circuit c20
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 10 of 16 v 1.0 aat1105 a buck-boost ?] inverting ?^ timing chart ?] ch1 ?^ note: scp 2 r scp scp i v c t ? 0.85v 2.03v lockout free 1.0v 0.56v t scp 0.37v oe dtc pwm output output scp scp comp v dd pgo
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 11 of 16 v 1.0 aat1105 a boost ?] step-up ?^ timing chart ?] ch-2 ?^ note: scp 2 r scp scp i v c t ? 0.85 v 2.03v lockout free t scp pwm output output scp scp comp v dd 1.0v 0.56v oe dtc 1.29v pgo
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 12 of 16 v 1.0 aat1105 a package dimension 16-pin tssop
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 13 of 16 v 1.0 aat1105 a 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 14 of 16 v 1.0 aat1105 a tape and reel
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 15 of 16 v 1.0 aat1105 a 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 AAT1105A xxxxxx tssop16 back marking yyww
advanced analog technology, inc. ? x?w?t??ta?|3--?q ? ? advanced analog technology, inc . ? page 16 of 16 v 1.0 aat1105 a ordering information

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