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product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 1 t t echnical echnical s s pecification pecification bq55090qt bq55090qt a27 a27 t t h h e e b b u u s s q q o o r r ? ? b b q q 5 5 5 5 0 0 9 9 0 0 q q t t a a 2 2 7 7 b b u u s s c c o o n n v v e e r r t t e e r r i i s s a a n n e e x x t t -g g e e n n - e e r r a a t t i i o o n n , , b b o o a a r r d d -m m o o u u n n t t a a b b l l e e , , i i s s o o l l a a t t e e d d , , f f i i x x e e d d s s w w i i t t c c h h i i n n g g f f r r e e q q u u e e n n c c y y d d c c / / d d c c c c o o n n v v e e r r t t e e r r t t h h a a t t u u s s e e s s s s y y n n c c h h r r o o n n o o u u s s r r e e c c t t i i f f i i c c a a t t i i o o n n t t o o a a c c h h i i e e v v e e e e x x t t r r e e m m e e l l y y h h i i g g h h c c o o n n v v e e r r s s i i o o n n e e f f f f i i c c i i e e n n c c y y . . t t h h e e p p o o w w e e r r d d i i s s s s i i p p a a t t e e d d b b y y t t h h e e c c o o n n v v e e r r t t e e r r i i s s s s o o l l o o w w t t h h a a t t a a h h e e a a t t s s i i n n k k i i s s n n o o t t r r e e q q u u i i r r e e d d , , w w h h i i c c h h s s a a v v e e s s c c o o s s t t , , w w e e i i g g h h t t , , h h e e i i g g h h t t , , a a n n d d a a p p p p l l i i c c a a t t i i o o n n e e f f f f o o r r t t . . t t h h e e b b u u s s q q o o r r s s e e r r i i e e s s p p r r o o v v i i d d e e s s a a n n i i s s o o l l a a t t e e d d s s t t e e p p d d o o w w n n v v o o l l t t a a g g e e f f r r o o m m 4 4 8 8 v v t t o o a a 9 9 . . 6 6 v v i i n n t t e e r r m m e e d d i i a a t t e e b b u u s s w w i i t t h h n n o o r r e e g g u u l l a a t t i i o o n n i i n n a a s s t t a a n n d d a a r r d d ? ? q q u u a a r r - t t e e r r -b b r r i i c c k k ? ? m m o o d d u u l l e e . . b b u u s s q q o o r r c c o o n n v v e e r r t t e e r r s s a a r r e e i i d d e e a a l l f f o o r r c c r r e e a a t t i i n n g g t t h h e e m m i i d d -b b u u s s v v o o l l t t a a g g e e r r e e q q u u i i r r e e d d t t o o d d r r i i v v e e p p o o i i n n t t -o o f f -l l o o a a d d ( ( n n o o n n -i i s s o o l l a a t t e e d d ) ) c c o o n n v v e e r r t t e e r r s s i i n n i i n n t t e e r r m m e e d d i i a a t t e e b b u u s s a a r r c c h h i i t t e e c c t t u u r r e e s s . . bq55090qta27 module bus bus conver conver ter ter 36-55v 36-55v 9.6v 9.6v 240w 240w att att 2000vdc 2000vdc quar quar ter-brick ter-brick input input output output power power isolation isolation dc bus conver dc bus conver ter ter ? ultra-high efficiency, 96% at full rated load current delivers up to 36 amps (240 watts) of output current (power) with minimal derating - no heatsink required input voltage range: 36v ? 55v provides 7.2-11v bus for distributed power architectures fixed frequency switching provides predictable emi per- formance operational features operational features on/off control referenced to input side (positive and negative logic options available) inherent current share (by droop method) for high cur- rent and parallel applications. contr contr ol features ol features industry standard quarter-brick bus converter pin-out industry standard size: 1.45? x 2.3? (36.8x58.4mm) total height only 0.445? (11.3mm), permits better air- flow and smaller card pitch total weight: 1.5 oz. (42 grams) flanged pins designed to permit surface mount solder- ing (avoid wave solder) using fpip technique mechanical features mechanical features 2000v, 30 m ? input-to-output isolation ul/cul 60950 recognized (us & canada), basic insu- lation rating tuv certified to en60950 meets 72/23/eec and 93/68/eec directives meets ul94v-0 flammability requirements safety features safety features input under-voltage lockout and over-voltage shutdown protects against abnormal input voltages latching output current limit and short circuit protection latching thermal shutdown pr pr otection features otection features
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 2 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification pin no. name function 1 vin(+) input positive (36v - 55v) 2 on/off logic control input to turn converter on and off. 3 vin(-) input negative 4 vout(-) output negative 5 vout(+) output positive notes 1) pins 1-3 are 0.040? (1.02mm) diameter with 0.080? (2.03 mm) diameter standoff shoulders. 2) pins 4 and 5 are 0.062? (1.57 mm) diameter with 0.100? (2.54 mm) diameter standoff shoulders. 3) other pin extension lengths available. recommended pin length is 0.03? (0.76mm) greater than the pcb thickness. 4) all pins: material - copper alloy finish - tin/lead over nickel plate 5) undimensioned components are shown for visual reference only. 6) all dimensions in inches (mm) tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 7) weight: 1.5 oz. (42 g) typical 8) workmanship: meets or exceeds ipc-a-610c class ii 9) ul/tuv standards require a clearance of 0.04? (1.02mm) around primary areas of the module. refer to section on keep out areas under application considerations for details. 10) the flanged pins are designed to permit surface mount soldeing (avoiding the wave soldering process) through the use of the flanged pin-in-paste technique. pin designations 0.300 (7.62) 0.600 (15.24) 1.45 (36.8) 0.43 (10.8) 0.600 (15.24) 0.14 (3.6) 2.30 (58.4) 2.00 (50.8) top view side view load board bottom side clearance see note 9 lowest component 0.445 + 0.022 (11.3 + 0.55) 0.056+/-0.034 (1.42+/-0.86) 0.145 (3.68) see note 3 flanged pin see note 10 mechanical diagram
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 3 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification parameter min. typ. max. units notes & conditions absolute maximum ratings input voltage non-operating 60 v continuous operating 55 v continuous isolation voltage (input to output) 2000 v basic insulation, pollution degree 2 operating temperature -40 100 c storage temperature -55 125 c voltage at on/off input pin -2 18 v input characteristics operating input voltage range 36 48 55 v input under-voltage lockout turn-on voltage threshold 33.5 34.5 v turn-off voltage threshold 31.5 33.5 v lockout voltage hysteresis 1 2 v input over-voltage shutdown turn-off voltage threshold 58.5 v turn-on voltage threshold 57 v maximum input current 7.5 a 100% load, 36 vin no-load input current 0.13 a disabled input current 7.0 15 ma inrush current transient rating 0.01 a 2 s input reflected ripple current 7 10 ma rms through 10 h inductor; figures 23-24 input terminal ripple current 120 ma rms ; figures 20-22 recommended input fuse 20 a fast blow external fuse recommended input filter component values (l\c) 1\6.6 h\f internal values, see figure e recommended external input capacitance 47 f typical esr 0.1-0.2 , see figure 20 output characteristics output voltage set point 9.6 v 48vin, no load output voltage regulation over line 40\3.8 %\v over load 5.2\500 %\mv over temperature 2\200 %\mv total output voltage range 6.55 11.0 v over sample, line, load, temperature & life output voltage ripple and noise 20mhz bandwidth peak-to-peak 35 50 mv full load, see figures 25-26 rms 12 mv full load, see figures 25-26 operating output current range 0 36 a at 7.2vout, 36vin; subject to derating output dc current-limit inception 48 a 36vin,output voltage 10% low; figure 19 output dc current-limit inception 33 a 55vin,output voltage 10% low; figure 19 output dc current-limit shutdown voltage 5 v current share accuracy (2 units paralleled) + 20 % % of rated output current back-drive current limit while disabled 10 ma negative current drawn from output maximum output capacitance 3,000 f 9.6vout at 27a resistive load dynamic characteristics input voltage ripple rejection 23 db figure 28 output voltage during load current transient for a step change in output current (0.1a/s) 200 mv 50%-75%-50% iout max; figures 17-18 settling time 100 s to within 1% vout nom turn-on transient turn-on time (without output capacitance) 250 s full load, vout=90% nom., 0 output cap. turn-on time (with output capacitance) 3 5 ms full load, vout=90% nom., 3,000 f cap. output voltage overshoot 0 % 3,000 f load cap., iout = 0a, vin nom. efficiency 100% load 95.8 % figures 1-4 50% load 96.5 % figures 1-4 temperature limits for power derating curves semiconductor junction temperature (see note 1) 125 c package rated to 175c board temperature 125 c board rated to 165c transformer temperature 125 c see figures 5 - 12 for derating curves isolation characteristics isolation voltage (dielectric strength) 2000 v isolation resistance 30 m isolation capacitance 470 pf 1. for normal operating conditions of 55c ambient temperature and 200 lfm airflow. device is designed to operate for a minimu m of 72 hours, once per year under the following conditions: 70c, 200 lfm airflow, 36vin, 240w output power. junction temperature during those condit ions will exceed the listed specification. bq55090qta27 electrical characteristics t a =25c, airflow rate=300 lfm, v in =48vdc unless otherwise noted; full operating temperature range is -40c to +100c ambient tem- perature with appropriate power derating. specifications subject to change without notice.
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 4 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification parameter p min. typ. max. units notes & conditions feature characteristics switching frequency 131 155 178 khz on/off control (option p) off-state voltage -1.0 0.8 v on-state voltage 2.4 18 v on/off control (option n) off-state voltage 2.4 18 v on-state voltage -1.0 0.8 v on/off control (either option) figures a, b pull-up voltage 10 v pull-up resistance 28 k over-temperature shutdown 145 150 c average pcb temperature over-temperature shutdown restart hysteresis 10 c load current scale factor 1524 see app note: output load current calc. reliability characteristics calculated mtbf (telcordia) 1.0 10 6 hrs. tr-nwt-000332; 80% load,300lfm, 40 o c t a calculated mtbf (mil-217) tbd 10 6 hrs. mil-hdbk-217f; 80% load, 300lfm, 40 o c t a field demonstrated mtbf 10 6 hrs. see website for latest values standards compliance parameter p notes standards compliance ul/cul 60950 file # e194341, basic insulation & pollution degree 2 en60950 certified by tuv 72/23/eec 93/68/eec needle flame test (iec 695-2-2) test on entire assembly; board & plastic components ul94v-0 compliant iec 61000-4-2 esd test, 8kv - np, 15kv air - np (normal performance) gr-1089-core section 7 - electrical safety, section 9 - bonding/grounding an external input fuse must always be used to meet these safety requirements. contact synqor for official safety certificates on new releases or download from the synqor website. qualification testing parameter p # units test conditions qualification testing life test 32 95% rated v in and load, units at derating point, 1000 hours vibration 5 10-55hz sweep, 0.060? total excursion,1 min./sweep, 120 sweeps for 3 axis mechanical shock 5 100g minimum, 2 drops in x and y axis, 1 drop in z axis temperature cycling 10 -40c to 100c, unit temp. ramp 15c/min., 500 cycles power/thermal cycling 5 t operating = min to max, v in = min to max, full load, 100 cycles design marginality 5 t min -10c to t max +10c, 5c steps, v in = min to max, 0-105% load humidity 5 85c, 85% rh, 1000 hours, 2 minutes on and 6 hours off solderability 15 pins mil-std-883, method 2003 extensive characterization testing of all synqor products and manufacturing processes is performed to ensure that we supply robust, reliable product. contact factory for official product family qualification document. electrical characteristics (continued) options synqor provides various options for logic sense, pin length and feature set for this family of dc/dc converters. please consult the synqor website (www.synqor.com) for information on available options. patents synqor is protected under various patents, including but not lim- ited to u.s. patent numbers 5,999,417; 6,222,742 b1; 6,594,159 b2; 6,545,890 b2.
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 5 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification 80 82 84 86 88 90 92 94 96 98 100 0 5 10 15 20 25 30 load current (a) efficiency (%) 40 vin 50 vin 0 1 2 3 4 5 6 7 8 9 10 11 0 5 10 15 20 25 30 load current (a) power dissipation (w) 40 vin 50 vin figure 2: power dissipation at nominal output voltage vs. load current for 40v and 50v input voltage at 25 c. 95.0 95.5 96.0 96.5 97.0 0 100 200 300 400 500 air flow (lfm) efficiency (%) 25c at 40vin 40c at 40vin 55c at 40vin 25c at 50vin 40c at 50vin 55c at 50vin figure 3: efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 c, 40 c, and 55 c (40v and 50v input voltages). 4.0 4.5 5.0 5.5 6.0 6.5 7.0 0 100 200 300 400 500 air flow (lfm) power dissipation (w) 25c at 40vin 40c at 40vin 55c at 40vin 25c at 50vin 40c at 50vin 55c at 50vin figure 4: power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 c, 40 c, and 55 c (40v and 50v input voltages). 0 5 10 15 20 25 30 0 2540557085 ambient air temperature ( o c) i out (a) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 50 lfm (0.25 m/s) figure 5: maximum output power derating curves vs. ambient air tem- perature for airflow rates of 50 lfm through 400 lfm with air flowing from pin 3 to pin 1 ( 40v input voltage). figure 6: thermal plot of converter at 32 amp load current (240w) with 55 c air flowing at the rate of 200 lfm. air is flowing across the converter from pin 3 to pin 1 ( 40v input voltage). figure 1: efficiency at nominal output voltage vs. load current for 40v and 50v input voltage at 25 c. semiconductor junction temperature is within 1 c of surface temperature
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 6 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification 0 5 10 15 20 25 0 2540557085 ambient air temperature ( o c) i out (a) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 50 lfm (0.25 m/s) figure 7: maximum output power derating curves vs. ambient air tem- perature for airflow rates of 50 lfm through 400 lfm with air flowing from pin 3 to pin 1 ( 50v input voltage). figure 8: thermal plot of converter at 26 amp load current (240w) with 55 c air flowing at the rate of 200 lfm. air is flowing across the converter from pin 3 to pin 1 ( 50v input voltage). 0 5 10 15 20 25 30 0 2540557085 ambient air temperature ( o c) i out (a) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 50 lfm (0.25 m/s) figure 9: maximum output power derating curves vs. ambient air tem- perature for airflow rates of 50 lfm through 400 lfm with air flowing from output to input ( 40v input voltage). figure 10: thermal plot of converter at 32 amp load current (240w) with 55 c air flowing at the rate of 200 lfm. air is flowing across the converter from output to input ( 40v input voltage). 0 5 10 15 20 25 0 2540557085 ambient air temperature ( o c) i out (a) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 50 lfm (0.25 m/s) figure 11: maximum output power derating curves vs. ambient air tem- perature for airflow rates of 50 lfm through 400 lfm with air flowing from output to input ( 50v input voltage). figure 12: thermal plot of converter at 26 amp load current (240w) with 55 c air flowing at the rate of 200 lfm. air is flowing across the converter from output to input ( 50v input voltage). semiconductor junction temperature is within 1 c of surface temperature semiconductor junction temperature is within 1 c of surface temperature semiconductor junction temperature is within 1 c of surface temperature
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 7 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification figure 13: turn-on transient at full load (resistive load at 32a) (100 s/div). ch1: vout (5v/div). input voltage = 40v . figure 14: turn-on transient at full load (resistive load at 26a) (100 s/div). ch1: vout (5v/div). input voltage = 50v . figure 15: turn-on transient at zero load (100 s/div). ch1: vout (5v/div). input voltage = 40v . figure 16: turn-on transient at zero load (100 s/div). ch1: vout (5v/div). input voltage = 50v . figure 17 : output voltage response to step-change in load current (50%-75%-50% of iout(max); di/dt = 0.1a/ s). load cap: 15 f, 100 m esr tantalum cap and 1 f ceramic cap. top trace: vout (200mv/div), bottom trace: iout (10a/div). vin= 40v figure 18 : output voltage response to step-change in load current (50%-75%-50% of iout(max); di/dt = 0.1a/ s). load cap: 15 f, 100 m esr tantalum cap and 1 f ceramic cap. top trace: vout (200mv/div), bottom trace: iout (10a/div). vin= 50v
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 8 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification 4 5 6 7 8 9 10 11 0 1020304050 load current (a) output voltage (v) 40v 50v figure 19: output voltage vs. load current showing typical current limit curves and converter shutdown points figure 20: test set-up diagram showing measurement points for input terminal ripple current (figs 21-22), input reflected ripple current (figs 23-24) and output voltage ripple (figs 25-26). figure 21: input terminal ripple current, i c , at full rated output cur- rent (32a) and 40v input voltage with 10 h source impedance and 47 f electrolytic capacitor (100 ma/div). see figure 20. figure 22: input terminal ripple current, i c , at full rated output cur- rent (26a) and 50v input voltage with 10 h source impedance and 47 f electrolytic capacitor (100 ma/div). see figure 20. figure 23: input reflected ripple current, i s , through a 10 h source inductor at 40v input voltage and 32a load current (5 ma/div). see figure 20. figure 24: input reflected ripple current, i s , through a 10 h source inductor at 50v input voltage and 26a load current (5 ma/div). see figure 20. 10 h source impedance dc/dc converter figs 23-24 figs 21-22 figs 25-26 1 f ceramic capacitor 15 f, 450m esr tantalum capacitor 47 f, <1 esr electrolytic capacitor v source i s i c v out
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 9 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification figure 25: output voltage ripple at 40v input voltage and 32a load current (20 mv/div). load capacitance: 1 f ceramic capacitor and 15 f tantalum capacitor. bandwidth: 20 mhz. see figure 20. figure 26: output voltage ripple at 50v input voltage and 26a load current (20 mv/div). load capacitance: 1 f ceramic capacitor and 15 f tantalum capacitor. bandwidth: 20 mhz. see figure 20. 0.001 0.01 0.1 10 100 1,000 10,000 100,000 hz output impedance ( ) 35v 35a 40v 32a 50v 26a figure 27: magnitude of incremental output impedance (z out = v out /i out ) for 35v, 40v, and 50v input voltage at full rated power. -35 -30 -25 -20 -15 -10 -5 0 10 100 1,000 10,000 100,000 hz forward transmission (db) 35v 35a 40v 32a 50v 26a figure 28: magntiude of incremental forward transmission (ft = v out /v in ) for 35v, 40v, and 50v input voltage at full rated power. -35 -30 -25 -20 -15 -10 -5 0 10 100 1,000 10,000 100,000 hz reverse transmission (db) 35v 35a 40v 32a 50v 26a figure 29: magnitude of incremental reverse transmission (rt = i in /i out ) for 35v, 40v, and 50v input voltage at full rated power. 0.1 1 10 100 1000 10 100 1,000 10,000 100,000 hz input impedance ( ) 35v 35a 40v 32a 50v 26a figure 30: magnitude of incremental input impedance (z in = v in /i in ) for 35v, 40v, and 50v input voltage at full rated power.
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 10 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification figure 31: load current (20a/div) as a function of time when the con- verter attempts to turn on into a 1 m short circuit. top trace (5ms/div) is an expansion of the on-time portion of the bottom trace.
product # bq55090qta27 phone 1-888-567-9596 www.synqor.com doc.# 005-2bq559j rev. b 10/1/04 page 11 input: input: output: output: current: current: p p ackage: ackage: 36-55 v 36-55 v 9.6 v 9.6 v 27 a 27 a quarter-brick quarter-brick t t echnical s echnical s pecification pecification part numbering system the part numbering system for synqor?s bus qor dc bus con- verters follows the format shown in the example below. the first 12 characters comprise the base part number and the last 3 characters indicate available options. although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145? pins. for this module the only feature set available is latching (k). these part numbers are more likely to be readily available in stock for evaluation and prototype quantities. application notes a variety of application notes and technical white papers can be downloaded in pdf format at www.synqor.com. ordering information the tables below show the valid model numbers and ordering options for converters in this product family. when ordering synqor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. the following option choices must be included in place of the x y z spaces in the model numbers listed above. w arranty synqor offers a three (3) year limited warranty. complete warranty information is listed on our web site or is available upon request from synqor. information furnished by synqor is believed to be accurate and reliable. however, no responsibility is assumed by synqor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of synqor. contact synqor for further information: phone : 978-849-0600 t oll free : 888-567-9596 fax : 978-849-0602 e-mail : sales@synqor.com w eb : www.synqor.com address : 155 swanson road boxborough, ma 01719 output max output voltage current bq55090qta27 xyz 36 - 55 v 9.6 v 27 a bq50120qta20 xyz 42 - 53 v 12 v 20 a bq50120qta25 xyz 42 - 53 v 12 v 25 a model number input voltage enable pin feature logic length set p - positive n - negative k - 0.110" n - 0.145" r - 0.180" y - 0.250" s - auto recovery k - latching options description: x y z bq 55 090 q t a 27 n k k product family package size performance level thermal design output current options (see ordering information) input voltage output voltage

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