1/8 october 2003 n 80m w high-side mosfet switch n 500ma continuous current per channel n independent thermal and short-circuit protection with overcurrent logic output n operating range from 2.7v to 5.5v n cmos- and ttl-compatible enable inputs n 2.5ms typical rise time n undervoltage lockout n 20 m a maximum standby supply current n ambient temperature range, 0c to 85c n esd protection description the ST2044 power distribution switches is intended for application where heavy capacitive loads and short circuits are likely to be encountered. these devices incorporate 80m w n-channel mosfet high-side power switches for power-distribution systems that require multiple powers switches in a single package. each switch is controlled by an independent logic enable input. gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. the charge pump requires no external components and allows operation from supplies as low as 2.7 v. when the output load exceeds the current-limit threshold or a short is present, these devices limit the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (ocx ) logic output low. when continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. recovery from a thermal shutdown is automatic once the device has cooled sufficiently. internal circuitry ensures the switch remains off until valid input voltage is present. these power-distribution switches are designed to current limit at 0.9 a. ordering codes ty pe temperature range package comments ST2044bd -40 to 85 c so-16 (tube) 50parts per tube / 40tube per box ST2044bdr -40 to 85 c so-16 (tape & reel) 2500 parts per reel ST2044 current limited power distribution switches sop
ST2044 2/8 pin configuration pin description absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. note1: all voltage are referred to gnd recommended operating condition pln n symbol name and function 1 gnda ground 2 in1 input voltage 3 en1 enable input. logic low turns on power switch in-out1 4 en2 enable input. logic low turns on power switch in-out2 5 gndb ground 6 in2 input voltage 7 en3 enable input. logic low turns on power switch in-out3 8 en4 enable input. logic low turns on power switch in-out4 9oc4 overcurrent. logic output active low in-out4 10 out4 power switch output 11 out3 power switch output 12 oc3 overcurrent. logic output active low in-out3 13 oc2 overcurrent. logic output active low in-out2 14 out2 power switch output 15 out1 power switch output 16 oc1 overcurrent. logic output active low in-out1 symbol parameter value unit v i input voltage range (note 1) -0.3 to 6 v v o output voltage range (note 1) -0.3 to (v i +0.3) v v ienx input voltage range -0.3 to 6 v i o continuous output current internally limited esd electrostatic discharge 2kv t j operating junction temperature -40 to 125 c symbol parameter min. typ. max. unit v i input voltage range (note 1) 2.7 5.5 v v o output voltage range (note 1) 0 5.5 v i o continuous output current (per switch) 0 500 ma
ST2044 3/8 block diagram
ST2044 4/8 power switch electrical characteristics (v i =5.5v,i o = rated current, v ien =0v, t j = 25c, unless otherwise specified.) (see note 1) enable input enx characteristics (v i =5.5v,i o = rated current, v ien =0v,t j = 25c, unless otherwise specified.) (see note 1) current limit characteristics (v i =5.5v,i o = rated current, v ien =0v,t j = 25c, unless otherwise specified.) (see note 1) supply current characteristics (v i =5.5v,i o = rated current, v ien =0v,t j = 25c, unless otherwise specified.) (see note 1) undervoltage characteristics (v i =5.5v,i o = rated current, v ien =0v,t j = 25c, unless otherwise specified.) (see note 1) symbol parameter test conditions min. typ. max. unit r ds(on) static drain-source on-state resistance v i =5v i o = 0.5a 80 100 m w v i =5v i o = 0.5a t j =85c 90 120 v i =5v i o = 0.5a t j =125c 100 135 v i =3.3v i o = 0.5a 90 125 v i =3.3v i o = 0.5a t j =85c 110 145 v i =3.3v i o = 0.5a t j =125c 120 160 t r output rise time v i =5.5v r l =10 w c l =1 m f 2.5 ms v i =2.7v r l =10 w c l =1 m f3 t f output fall time v i =5.5v r l =10 w c l =1 m f 0.3 ms v i =2.7v r l =10 w c l =1 m f 0.2 symbol parameter test conditions min. typ. max. unit v ih high level input voltage v i =2.7v to 5.5v 2 v v il low level input voltage v i =4.5v to 5.5v 0.8 v v i =2.7v to 4.5v 0.4 i i input current v ienx =0v or v i -0.5 0.5 m a t on turn-on time r l =10 w c l =100 m f20ms t off turn-off time r l =10 w c l =100 m f40ms symbol parameter test conditions min. typ. max. unit i os short circuit output current v i =5v, out connected to gnd, device enabled into short circuit 0.7 1 1.3 a symbol parameter test conditions min. typ. max. unit i sol current low level output v ienx =v i , no load, 0.05 2 m a v ienx =v i , no load, t j =-40 to 125c 20 i soh current low high output v ienx = 0, no load, 140 180 m a v ienx = 0, no load, t j =-40 to 125c 200 i l output leakage current v ienx =v i , output connected to gnd, t j =-40 to 125c 20 m a symbol parameter test conditions min. typ. max. unit v il low level input voltage 2 2.5 v v hys hysteresis 100 mv
ST2044 5/8 overcurrent (oc ) caracteristics (v i =5.5v,i o = rated current, v ien =0v,t j = 25c, unless otherwise specified.) (see note 1) note 1: pulse testing techniques maintain junction temperature close to ambient temperature: thermal effect must be takes into account separately. note 2: specified by design, not production tested. test circuit waveform: propagation delays (f=1mhz; 50% duty cycle) symbol parameter test conditions min. typ. max. unit i sink sink current v o =5v 10 ma v o output low voltage i o =5ma 0.5 v i off off-state current v o =5v v o =3.3v 1 m a
ST2044 6/8 dim. mm. inch min. typ max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.004 0.008 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45? (typ.) d 9.8 10 0.385 0.393 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.62 0.024 s8 ? (max.) so-16 mechanical data po13h
ST2044 7/8 dim. mm. inch min. typ max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 22.4 0.882 ao 6.45 6.65 0.254 0.262 bo 10.3 10.5 0.406 0.414 ko 2.1 2.3 0.082 0.090 po 3.9 4.1 0.153 0.161 p 7.9 8.1 0.311 0.319 tape & reel so-16 mechanical data
ST2044 8/8 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states. http://www.st.com
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