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TEA1993TS greenchip synchronous rectifier controller rev. 1.1 14 september 2016 product data sheet 1 general description the TEA1993TS is a member of a new generation of synchronous rectifier (sr) controller ics for switched mode power supplies. it includes an adaptive gate drive for maximum efficiency at any load. the TEA1993TS is a dedicated controller ic for synchronous rectification on the secondary side of flyback converters. it incorporates the sensing stage and driver stage for driving the sr mosfet, which is rectifying the output of the secondary transformer winding. the TEA1993TS can generate its own supply voltage for battery charging applications with low output voltage or for applications with high-side rectification. the TEA1993TS is fabricated in a silicon-on-insulator (soi) process. 2 features and benefits 2.1 efficiency features ? adaptive gate drive for maximum efficiency at any load ? typical supply current in no-load operation below 200 a 2.2 application features ? operates in a wide output voltage range down to 0 v ? drain sense pin capable of handling input voltages up to 120 v ? self-supplying for operation with low output voltage ? self-supplying for high-side rectification without the use of an auxiliary winding ? operates with standard and logic level sr mosfets ? supports usb bc, usb pd, and quick charge applications ? tsop6 package 2.3 control features ? adaptive gate drive for fast turn-off at the end of conduction ? undervoltage lockout (uvlo) with active gate pull-down
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 2 / 20 3 applications the TEA1993TS is intended for flyback power supplies. in such applications, it can drive the external synchronous rectifier mosfet, which replaces the diode for the rectification of the voltage on the secondary winding of the transformer. it can be used in all power supplies needing high efficiency, like: ? chargers ? adapters ? flyback power supplies with very low and/or variable output voltage 4 ordering information table 1. ordering information package type number name description version TEA1993TS /1 tsop6 plastic surface-mounted package; 6 leads sot457 5 marking table 2. marking codes type number marking code TEA1993TS/1 tea1993
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 3 / 20 6 block diagram v and i reference under voltage lockout logic enable 4 v - 12 v energy save control blanking on regulation cap x v drain gate source gnd aaa-021170 off regulation switch-off +300 mv -30 mv -37 mv - - - tea1993 driver supply i ch(cap) figure 1. TEA1993TS block diagram
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 4 / 20 7 pinning information 7.1 pinning i c cap drain gnd x v gate aaa-021171 1 2 3 6 source 5 4 figure 2. TEA1993TS pin configuration (sot457) 7.2 pin description table 3. pin description symbol pin description cap 1 capacitor input for internal supply voltage gnd 2 ground xv 3 external supply input gate 4 gate driver output for sr mosfet source 5 source sense input of sr mosfet drain 6 drain sense input of sr mosfet
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 5 / 20 8 functional description 8.1 introduction the TEA1993TS is a controller ic for synchronous rectification (sr) in flyback applications. it can drive the external synchronous rectifier mosfet for the rectification of the voltage on the secondary winding of the transformer. figure 3 shows a typical configuration. driver primar y controller s e c o n d a r y c o n t r o l l e r s 1 c a p v c c o p t o g n d g a t e dra i n x v g n d s o u r c e tea 1 9 9 3 isense aux vcc h v ctrl gnd protect 8 6 2 7 3 5 4 1 a a a - 0 2 1 1 7 7 sr low side figure 3. TEA1993TS configuration with low-side rectification 8.2 start-up and undervoltage lockout (uvlo; cap and xv pins) the capacitor on the cap pin supplies the TEA1993TS. it is charged via the drain pin when the xv voltage is < 4.7 v. the charge current (i ch(cap) ) charges the capacitor to 4 v. when this voltage is reached, it stops charging. if the external voltage exceeds 4.7 v, the xv pin increases the capacitor voltage via an integrated diode. the increase of the capacitor voltage gives a higher gate driver voltage (v g(max) ). when the voltage on the cap pin exceeds v start(cap) (3.7 v typical), the ic leaves the uvlo state and activates the synchronous rectifier circuitry. when the voltage drops to below 3.6 v (typical), the uvlo state is reentered and the sr mosfet gate driver output is actively kept low. 8.3 drain sense (drain pin) the drain sense pin is an input pin capable of handling input voltages up to 120 v. at a positive drain sense voltage, the gate driver is in off-mode with the gate driver pulled down (pin gate). at a negative drain sense voltage, the ic enables the synchronous rectification (sr) by sensing the drain source differential voltage.
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 6 / 20 8.4 synchronous rectification (drain and source pins) the ic senses the voltage difference between the drain sense (drain pin) and the source sense (source pin) connections. this drain source differential voltage of the sr mosfet is used to drive the gate of the sr mosfet. in the regulation phase, the ic regulates the difference between the drain and the source sense inputs to an absolute level of 37 mv. when the absolute difference exceeds 37 mv (v reg(drv) ), the gate driver output increases the gate voltage of the external sr mosfet until the 37 mv level is reached. the sr mosfet does not switch off at low current. to avoid that the device switches off because of ringing, a minimum on-time of 1.5 s (t tact(sr) (min) ) is integrated. when the absolute difference is < 30 mv, the gate driver output decreases the gate voltage of the external sr mosfet. the voltage waveform on the sr mosfet gate follows the waveform of the current through the sr mosfet. when the current through the sr mosfet reaches zero, the sr mosfet is quickly switched off. after sr mosfet switch-off, the drain voltage increases. when the drain voltage exceeds 300 mv, a low ohmic gate pull-down of 7 keeps the gate of the sr mosfet switched off. 8.5 gate driver (gate pin) the gate driver circuit charges the gate of the external sr mosfet during the rising part of the current. the driver circuit discharges the gate during the falling part of the current. the gate driver has a source capability of typically 0.50 a and a sink capability of typically 0.65 a, allowing fast turn-on and fast turn-off of the external sr mosfet. the maximum output voltage of the driver is limited to 12 v. this high output voltage drives all mosfet brands to the minimum on-state resistance. in applications where the ic is supplied with 5 v, the maximum output voltage of the driver is 4.2 v and logic level sr mosfets can be used (see figure 3 ). the ic is self-supplying in applications with high-side rectification or in battery charging applications with an output voltage below 4.7 v. when the xv pin is connected to ground for driving standard sr mosfets, the driver is regulated to 9 v. when the xv pin is connected to the converter output for driving logic-level sr mosfets, the driver is regulated to 4 v if the output voltage is below 4.7 v.
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 7 / 20 aaa-021 190 0 v cap v g(max) v cap v g(max) 12 v 5 v x v 12 v 1 v 10 v 9 v 4 v figure 4. maximum gate voltage v g(max) during start-up conditions (v cap < v start(cap) ) and uvlo, the driver output voltage is actively pulled low. 8.6 source sense (source pin) the ic is equipped with an additional source sense pin (source). this pin is used for measuring the drain-to-source voltage of the external sr mosfet. the source sense input must be connected as close as possible to the source pin of the external sr mosfet. it minimizes errors, caused by voltage differences on pcb tracks due to parasitic inductance in combination with large di/dt values.
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 8 / 20 9 limiting values table 4. limiting values in accordance with the absolute maximum rating system (iec 60134). all voltages are measured with respect to ground (pin 2); positive currents flow into the chip. voltage ratings are valid provided other ratings are not violated; current ratings are valid provided the other ratings are not violated. symbol parameter conditions min max unit voltages v xv voltage on pin xv ?0.4 +38 v v sense(drain) sense voltage on pin drain ?0.8 +120 v v sense(source) sense voltage on pin source ?0.4 +0.4 v currents i xv current on pin xv peak current - 0.5 a general p tot total power dissipation t amb = 90 c - 300 mw t stg storage temperature ?55 +150 c t j junction temperature ?40 +150 c electrostatic discharge (esd) class 2 human body model [1] - 2000 v v esd electrostatic discharge voltage charged device model - 500 v [1] equivalent to discharging a 100 pf capacitor through a 1.5 k series resistor. 10 thermal characteristics table 5. thermal characteristics symbol parameter conditions typ unit r th(j-a) thermal resistance from junction to ambient jedec test board 200 k/w r th(j-c) thermal resistance from junction to case jedec test board 115 k/w
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 9 / 20 11 characteristics table 6. characteristics ?25 c < t j < +125 c; v xv = 12 v; c cap = 1 f; c gate = 10 nf (capacitor between the gate and the gnd pins); all voltages are measured with respect to ground (pin 2); currents are positive when flowing into the ic; unless otherwise specified. limits are production tested at 25 c. statistical characterization in the temperature operating range ensure these limits. symbol parameter conditions min typ max unit supply voltage management (xv and cap pins) v start(cap) start voltage on pin cap v xv = 0 v 3.55 3.70 3.90 v v stop(cap) stop voltage on pin cap v xv = 0 v 3.45 3.60 3.80 v v xv = 0 v; v cap = 7 v; v drain = 12 v; t j = 25 c ?95 ?70 ?50 ma i ch(cap) charge current on pin cap v xv = 2 v; v cap = 3.65 v; v drain = 12 v; t j = 25 c ?95 ?70 ?50 ma v xv = 0 v; v drain = 12 v 8.70 9.20 9.60 v v xv = 2 v; v drain = 12 v 3.80 4.00 4.15 v v xv = 5 v 4.15 4.30 4.75 v v i(cap) input voltage on pin cap v xv = 12 v 11.0 11.3 11.7 v power save operation; v xv = 5 v 90 160 250 a i i(xv) input current on pin xv normal operation; without gate charge; v xv = 5 v; t j = 25 c 1.35 1.60 1.85 ma synchronous rectification sense input (drain and source pins) v reg(drv) driver regulation voltage v source = 0 v; t j = 25 c ?40 ?37 ?35 mv v swoff switch-off voltage v source = 0 v; t j = 25 c 200 300 400 mv t d(act)(drv) driver activation delay time v source = 0 v; normal operation; time for step on v drain (2 v to ?0.5 v) to rising of v gate at 10 % of end value - 65 - ns t d(deact)(drv) driver deactivation delay time v source = 0 v; normal operation; time for step on v drain (?0.5 v to 2 v) to falling of v gate at 10 % begin value - 40 - ns t act(sr)(min) minimum synchronous rectification active time v xv = v cap = 5 v; t j = 25 c 1.20 1.50 1.80 s gate driver (gate pin)
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 10 / 20 symbol parameter conditions min typ max unit peak curent v xv = 5 v; v ds = ?0.5 v; v g = 0 v - ?0.13 - a i source source current v xv = 12 v; v ds = ?0.5 v; v g = 0 v - ?0.50 - a regulation current v xv = 5 v; v ds = 0 v; v g = 4 v - 150 - ma v xv = 12 v; v ds = 0 v; v g = 10 v - 210 - ma peak current v xv = 5 v; v ds = 4 v; v g = 4 v - 0.35 - a i sink sink current v xv = 12 v; v ds = 4 v; v g = 4 v - 0.65 - a r pd(g) gate pull-down resistance v drain = 4 v; i gate = 30 ma; v xv = 12 v; t j = 25 c 6.00 6.80 7.60 v xv = 0 v 7.80 8.90 9.60 v v xv = 2 v 3.75 3.95 4.15 v v xv = 5 v 4.00 4.20 4.40 v v xv = v cap = 5 v 4.90 4.95 5.00 v v xv = 12 v 9.40 9.80 10.70 v v g(max) maximum gate voltage v xv = 18 v to 38 v 11.80 12.30 12.70 v
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 11 / 20 11.1 temperature curves 11.1.1 charge current (cap pin) aaa-022432 -50 -25 0 25 50 75 100 125 150 -100 -80 -60 -40 -20 0 t (c) i ch(cap) i ch(cap) (ma) (ma) (1) (1) (2) (2) (1) i ch(cap) at v cap = 7 v; v xv = 0 v (2) i ch(cap) at v cap = 3.65 v; v xv = 2 v figure 5. i ch(cap) as a function of temperature 11.1.2 operating current (xv pin) aaa-022437 -50 -25 0 25 50 75 100 125 150 0 400 800 1200 1600 2000 t (c) i i(xv) i i(xv) (a) (a) (1) (1) (2) (2) (1) i i(xv) ) - power save operation (2) i i(xv ) - normal operation figure 6. i i(xv) as a function of temperature
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 12 / 20 11.1.3 driver regulation voltage t ( c ) -50 150 100 5 0 0 -25 2 5 7 5 125 aaa-022449 -30 -20 -40 -10 v reg(drv) (mv) 0 -50 figure 7. v reg(drv) as a function of temperature 11.1.4 gate pull-down resistance aaa-022462 -50 -25 0 25 50 75 100 125 150 0 2 4 6 8 10 t (c) r pd(g) r pd(g) () () figure 8. r pd(g) as a function of temperature
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 13 / 20 11.1.5 switch-off voltage aaa-022464 -50 -25 0 25 50 75 100 125 150 0 100 200 300 400 t (c) v swoff v swoff (mv) (mv) figure 9. v swoff as a function of temperature 11.1.6 minimum synchronous rectification active time aaa-022465 -50 -25 0 25 50 75 100 125 150 0 0.5 1 1.5 2 2.5 t (c) t act(sr)(min) t act(sr)(min) (s) (s) figure 10. t act(sr)min as a function of temperature
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 14 / 20 12 application information a flyback switched mode power supply with the TEA1993TS consists of a primary side controller with a primary switch, a transformer, and an output stage. to obtain low conduction loss rectification, an sr mosfet is used in the output stage. the sr mosfet can be placed low-side (see figure 3 ) or can be placed high-side (see figure 11 ). in the high-side application, the TEA1993TS is self-supplying. the capacitor on the cap pin supplies the TEA1993TS . when the drain voltage is positive, it is charged via the drain pin. the gate drive voltage for the synchronous rectifier switch is derived from the voltage difference between the corresponding drain sense and source sense pins. special attention must be paid to the connection of the drain sense and source sense pins. the voltages measured on these pins are used for the gate drive voltage. wrong measurement results in a less efficient gate drive because a gate voltage that is either too low or too high. the connections to these pins must not interfere with the power wiring. the power wiring conducts currents with high di/dt values. it can easily cause measurement errors resulting from induced voltages due to parasitic inductances. the separate source sense pins make it possible to sense the source voltage of the external mosfets directly. so, the current carrying power ground tracks are not required. d r i v e r primar y con t r o l l e r s e c o n d a r y c o n t r o l l e r s 1 c a p x v o p t o g n d g a t e dra i n x v g n d s o u r c e tea 1 9 9 3 isense aux vcc h v ctrl gnd prot ect 8 6 2 7 3 5 4 1 a a a - 0 2 1 2 1 6 sr h igh sid e figure 11. TEA1993TS configuration with high-side rectification
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 15 / 20 13 package outline table 7. r e f e r e n c e s o u t l i n e v e r s i o n e u r o p e a n p r o j e c t i o n i s s u e d a t e i e c j e d e c j e i t a s o t 4 5 7 s c - 7 4 w b m b p d e p i n 1 i n d e x a a 1 l p q d e t a i l x h e e v m a a b y s c a l e c x 1 3 2 4 5 6 0 1 2 m m p l a s t i c s u r f a c e - m o u n t e d p a c k a g e ( t s o p 6 ) ; 6 l e a d s s o t 4 5 7 u n i t a 1 b p c d e h e l p q y w v m m 0 . 1 0 . 0 1 3 0 . 4 0 0 . 2 5 3 . 1 2 . 7 0 . 2 6 0 . 1 0 1 . 7 1 . 3 e 0 . 9 5 3 . 0 2 . 5 0 . 2 0 . 1 0 . 2 d i m e n s i o n s ( m m a r e t h e o r i g i n a l d i m e n s i o n s ) 0 . 6 0 . 2 0 . 3 3 0 . 2 3 a 1 . 1 0 . 9 0 5 - 1 1 - 0 7 0 6 - 0 3 - 1 6 os,fae trg o1i01,e bfm9see if)vul :)ifom/
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 16 / 20 14 revision history table 8. revision history document id release date data sheet status change notice supersedes TEA1993TS v.1.1 20160914 product data sheet - TEA1993TS v.1.0 modifications ? section 4 has been updated. ? section 5 has been added. TEA1993TS v.1.0 20160531 product data sheet - -
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 17 / 20 15 legal information 15.1 data sheet status document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objective specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification. [1] please consult the most recently issued document before initiating or completing a design. [2] the term 'short data sheet' is explained in section "definitions". 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nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 18 / 20 quick reference data the quick reference data is an extract of the product data given in the limiting values and characteristics sections of this document, and as such is not complete, exhaustive or legally binding. export control this document as well as the item(s) described herein may be subject to export control regulations. export might require a prior authorization from competent authorities. non-automotive qualified products unless this data sheet expressly states that this specific nxp semiconductors product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nxp semiconductors accepts no liability for inclusion and/or use of non- automotive qualified products in automotive equipment or applications. in the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without nxp semiconductors warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nxp semiconductors specifications such use shall be solely at customers own risk, and (c) customer fully indemnifies nxp semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond nxp semiconductors standard warranty and nxp semiconductors product specifications. translations a non-english (translated) version of a document is for reference only. the english version shall prevail in case of any discrepancy between the translated and english versions. 15.4 trademarks notice: all referenced brands, product names, service names and trademarks are the property of their respective owners. greenchip is a trademark of nxp semiconductors n.v.
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller TEA1993TS all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2016. all rights reserved. product data sheet rev. 1.1 14 september 2016 19 / 20 tables tab. 1. ordering information . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... .2 tab. 2. marking codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ...2 tab. 3. pin description .. . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . . ... . ... . ...4 tab. 4. limiting values .. . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . 8 tab. 5. thermal characteristics . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . . 8 tab. 6. characteristics .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . .9 tab. 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . 15 tab. 8. revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ...16 figures fig. 1. TEA1993TS block diagram . . . . . . . . ... . ... . ... . ... . ... . ... 3 fig. 2. TEA1993TS pin configuration (sot457) . ... . ... . ..4 fig. 3. TEA1993TS configuration with low-side rectification ........ . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... 5 fig. 4. maximum gate voltage vg(max) . . . . ... . ... . ... . ... . ...7 fig. 5. ich(cap) as a function of temperature . . . ... . ... . . 11 fig. 6. ii(xv) as a function of temperature . . . ... . ... . ... . .. 11 fig. 7. vreg(drv) as a function of temperature . . . ... . ... . .12 fig. 8. rpd(g) as a function of temperature . ... . ... . ... . ..12 fig. 9. vswoff as a function of temperature . . ... . ... . ... . ..13 fig. 10. tact(sr)min as a function of temperature .. . ... . ...13 fig. 11. TEA1993TS configuration with high-side rectification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . . ... . ... 14 fig. 12. package outline sot457 (tsop6) . . ... . ... . . ... . .. 15
nxp semiconductors TEA1993TS greenchip synchronous rectifier controller please be aware that important notices concerning this document and the product(s) described herein, have been included in section 'legal information'. ? nxp semiconductors n.v. 2016. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com date of release: 14 september 2016 document identifier: TEA1993TS contents 1 general description . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . . ... . . 1 2 features and benefits . . . . . . . . . . . . . ... . ... . ... . . ... . ... . ... . ...1 2.1 efficiency features . . . . . . . . . . . . . . . . . . . . ... . . ... . ... . ... . ... . ... . 1 2.2 application features . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . . 1 2.3 control features .. . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . . 1 3 applications ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . . ... . ... . ... . ... . .2 4 ordering information . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ... 2 5 marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ... .2 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ... 3 7 pinning information . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ... . 4 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . .. 4 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . . 4 8 functional description . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ..5 8.1 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . .. 5 8.2 start-up and undervoltage lockout (uvlo; cap and xv pins) . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ... . 5 8.3 drain sense (drain pin) .. . . . . . ... . ... . ... . ... . ... . ... . ... .5 8.4 synchronous rectification (drain and source pins) . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . . 6 8.5 gate driver (gate pin) . . . . . . . . . . . . . ... . ... . ... . ... . ... . . ... .6 8.6 source sense (source pin) . . . ... . ... . ... . ... . ... . ... . . 7 9 limiting values . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ... 8 10 thermal characteristics . . . . . . . . . . . ... . ... . ... . ... . ... . ... . ...8 11 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . . ... . ... . ... . ... . 9 11.1 temperature curves . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ...11 11.1.1 charge current (cap pin) . . . . . . . . . ... . ... . ... . ... . ... . ...11 11.1.2 operating current (xv pin) . . . . . ... . ... . ... . ... . ... . ... . . 11 11.1.3 driver regulation voltage .. . . . . . . . . . ... . ... . ... . ... . ... . ...12 11.1.4 gate pull-down resistance .. . . . . . . ... . ... . ... . ... . ... . ... 12 11.1.5 switch-off voltage . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . 13 11.1.6 minimum synchronous rectification active time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... . .. 13 12 application information . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... 14 13 package outline . . . . . . . . . . . . . . . . . . . . . . . ... . . ... . ... . ... . ... . ... . .15 14 revision history . . . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . . ... . .. 16 15 legal information . . . . . . . . . . . . . . . . . . . . . . . ... . ... . ... . ... . ... . ... 17

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