1 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation features +3.0v to +5.5v input voltage range 500ma continuous load current per channel 2.6v undervoltage lockout 1.25a short circuit current limit 100m ? maximum on-resistance 75 a on-state supply current 1 a shutdown current output can be forced higher than input (off-state) thermal shutdown slow turn on and fast turn off sp2525a description the sp2525a device is an integrated high-side power switch for self-powered ideal for self- powered and bus-powered universal serial bus (usb) applications. the high-side switches are mosfet with 70m ? rds(on), which meets usb voltage drop requirements for maximum transmission wire length. multi-purpose open-drain fault flag output indicates over- current limiting, thermal shutdown, or undervoltage lockout for each channel. output current is typically limited to 0.85a below the 5a safety requirement, and the thermal shutdown functions shuts the switch off to prevent damage under overcurrent condition. guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing emi and preventing the voltage at upstream port from dropping excessively. usb high-side power switch applications usb power management hot plug-in power supplies battery charger circuit now available in lead free packaging active-high version: sp2525a-1 active-low version: sp2525a-2 typical application circuit one port self powered hub 1 2 3 4 5 6 7 8 sp2525a 8 pin nsioc out in out gnd en flg nc in d ata gnd d- d+ vbus in out gnd 10 f cout 10k + 1 f cin vin on/off overcurrent gnd sp2525a en flg gnd nc out in out in 33 f ferrite bead ferrite bead 0.01 f d ata vbus d+ d- gnd vcc 5.0v 0.01 f spx1521 usb controller + + 33 f 4.50v to 5.25v upstream vbus 100ma max 33 f, 16v tantalum, or 100 f, 10v electrolytic bold line indicate high-current traces preliminary
2 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation supply voltage( v in ) ..........................................7.0v fault flag voltage ( v flg ) ..................................7.0v fault flag current ( i flg ) ..................................50ma unless otherwise noted, the following specifications apply for v in = +5.0v, t a = 25 c. enable input ( v en ) .....................................-0.3v - 15v operating temperature range.............-40?c to +85?c storage temperature range..............-65?c to +150?c these are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. absolute maximum ratings electrical characteristics power dissipation per package 8-pin nsoic (derate 6.14mw/ o c above +70 o c).......500mw r e t e m a r a p. n i m. p y t. x a ms t i n us n o i t i d n o c t n e r r u c y l p p u s5 7 . 0 5 7 0 . 5 0 0 1 a v n e n e p o = t u o " 0 " c i g o l = v n e n e p o = t u o " 1 " c i g o l = e g a t l o v t u p n i e l b a n e 4 . 2 7 . 1 0 . 2 8 . 0 v v n e " 0 " c i g o l = v n e " 1 " c i g o l = t n e r r u c t u p n i e l b a n e1 0 . 0 1 0 . 0 1 1 a v n e " 0 " c i g o l = v n e " 1 " c i g o l = e c n a t i c a p a c t u p n i e l b a n e1f p e c n a t s i s e r t e f s o m t u p t u o0 70 0 1m ? y a l e d n o - n r u t t u p t u o0 0 1 s r l 0 1 = ? t u p t u o h c a e e m i t e s i r n o - n r u t t u p t u o0 0 0 10 0 0 4 s r l 0 1 = ? t u p t u o h c a e y a l e d f f o - n r u t t u p t u o8 . 00 2 s r l 0 1 = ? t u p t u o h c a e e m i t l l a f f f o - n r u t t u p t u o7 . 00 2 s r l 0 1 = ? t u p t u o h c a e t n e r r u c e g a k a e l t u p t u o0 1 a d l o h s e r h t t i m i l t n e r r u c6 . 00 . 15 2 . 1a n w o d t u h s e r u t a r e p m e t - r e v o d l o h s e r h t 5 3 1 5 2 1 o c t j g n i s a e r c n i t j g n i s a e r c e d e c n a t s i s e r t u p t u o g a l f r o r r e0 1 5 1 5 2 0 4 ? v n i i , v 5 = l a m 0 1 = v n i i , v 3 . 3 = l a m 0 1 = t n e r r u c f f o g a l f r o r r e1 0 . 01 a v g a l f v 5 = d l o h s e r h t o l v u6 . 2 4 . 2 v v n i g n i s a e r c n i v n i g n i s a e r c e d
3 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation test circuit pin description out sp2525a in 10 ? v cc out in en flg gnd 10k 0.1 f +5v nc on off r e b m u n n i pe m a n n i pn o i t p i r c s e d 1n e . 2 - a 5 2 5 2 p s r o f w o l e v i t c a d n a 1 - a 5 2 5 2 p s r o f h g i h e v i t c a t u p n i e l b a n e 2g l f n a c t i . h c t i w s r e w o p r o f t u p t u o g a l f t l u a f d e n i a r d - n e p o d n a w o l - e v i t c a n a n a c o s l a t i , n o i t a r e p o e d o m l a m r o n n i . e v i t c a s i l t c f i t i m i l t n e r r u c e t a c i d n i . e g a t l o v r e d n u r o n w o d t u h s l a m r e h t e t a c i d n i 3d n g. d n u o r g r e w o p p i h c 4c n. d e t c e n n o c y l l a n r e t n i t o n 7 , 5n i. t u p n i y l p p u s r e w o p 8 , 6t u o. t u p t u o h c t i w s t e f s o m
4 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation error flag an error flag is an open-drained output of an n- channel mosfet, the flg output is pulled low to signal the following fault conditions: input undervoltage, output current limit, and thermal shutdown. current limit the current limit threshold is preset internally. it protects the output mosfet switches from damage resulting from undesirable short circuit conditions or excess inrush current, which is often encountered during hot plug-in. the low limit of the current limit threshold of the sp2525a allows a minimum current of 0.5a through the mosfet switches. a current limit condition will signal the error flag. thermal shutdown when temperature of sp2525a exceeds 135? for any reasons, the thermal shutdown function turns off the mosfet switch and signals the error flag. a hysteresis of 10? prevents the mosfets from turning back on until the chip temperature drops below 125?. supply filtering a 0.1 f to 1 f bypass capacitor from in to gnd, located near the device, is strongly rec- ommended to control supply transients. with- out a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. application information transient requirements usb supports dynamic attachment (hot plug-in) of peripherals. a current surge is caused by the input capacitance of downstream device. ferrite beads are recommended in series with all power and ground connector pins. ferrite beads reduce emi and limit the inrush current during hot- attachment by filtering high-frequency signals. short circuit transient bulk capacitance provides the short-term tran- sient current needed during a hot-attachment event. a 33 f/16v tantalum or a 100 f/10v electro- lytic capacitor mounted close to downstream con- nector each port should provide transient drop protection printed circuit layout the power circuitry of usb printed circuit boards requires a customized layout to maximize ther- mal dissipation and to minimize voltage drop and emi.
5 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation block diagram current limit cs out charge pump uvlo thermal shutdown driver flg en in power n-mosfet gnd
6 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation figure 4. on-state supply current vs. supply voltage figure 1. output on-resistance vs. supply voltage figure 2. output on-resistance vs. temperature figure 3. uvlo threshold voltage vs. temperature typical performance characteristics v in = +5.0v, single mosfet switch section, and t amb = +25 o c unless otherwise noted. uvlo threshold voltage vs. temperature 2.2 2.3 2.4 2.5 2.6 2.7 2.8 -40 -20 0 20 40 60 80 100 120 temperature (oc) uvlo threshold voltage (v) rising falling on-state supply current vs. supply voltage 50 60 70 80 90 100 2345678 supply voltage (v) switch-on supply current (a) output on-resistance vs. supply voltage 64 65 66 67 68 69 70 234567 supply voltage (v) switch-on resistance (m?) on-resistance vs. temperature 50 60 70 80 90 -60 -40 -20 0 20 40 60 80 100 120 temperature (c) on resistance (m?)
7 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation figure 6. off-state supply current vs. supply voltage figure 5. on-state supply current vs. temperature typical performance characteristics v in = +5.0v, single mosfet switch section, and t amb = +25 o c unless otherwise noted. figure 7. control threshold vs. supply voltage on-state supply current vs. supply voltage 50 60 70 80 90 100 2345678 supply voltage (v) switch-on supply current (a) ctl threshold voltage vs. supply voltage 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 2.60 2.80 234567 supply voltage (v) threshold voltage (v) ctl rising c tl falling off state supply current vs. supply voltage 0.00 0.02 0.04 0.06 0.08 0.10 345678 supply voltage (v) supply current (a) figure 8. current limit threshold vs. temperature current limit threshold vs. temperature 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 -60 -40 -20 0 20 40 60 80 100 120 140 temperature (c) output threshold (a)
8 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation typical performance characteristics v in = +5.0v, single mosfet switch section, and t amb = +25 o c unless otherwise noted. figure 9. output rise time vs. temperature output fall time vs. temperature 0.38 0.40 0.42 0.44 0.46 0.48 0.50 0.52 0.54 -40 -20 0 20 40 60 80 100 120 temperature (c) turn-off fall time (s) output rise time vs. temperature 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 -40 -20 0 20 40 60 80 100 120 temperature (c) turn-on resistance (ms) figure 7. output fall time vs. temperature
9 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation package: 8 pin nsoic a a1 a2 side view seating plane section b-b with plating symbol min nom max a 1.35 - 1.75 a1 0.1 - 0.25 a2 1.25 - 1.65 b 0.31 - 0.51 c 0.17 - 0.24 d e e1 e l 0.4 - 1.27 l1 l2 ?0o-8o ?1 5o - 15o note: dimensions in (mm) 8 pin nsoic jedec mo-012 (aa) variation 4.90 bsc 6.00 bsc 3.90 bsc 1.27 bsc 1.04 ref 0.25 bsc gauge plane l1 l 1 seating plane l2 view c top view b see view c b b e e/2 e1 index area (d/2 x e1/2) e1/2 d 1 e c base metal b
10 date: 12/22/04 sp2525a usb high-side power switch ?co pyright 2004 sipex corporation part number temperature range package types sp2525a-1en ................................................. -40 c to +85 c ................................................... 8-pin nsoic sp2525a-1en/tr ........................................... -40 c to +85 c .................................................. 8-pin nsoic sp2525a-2en ................................................. -40 c to +85 c ................................................... 8-pin nsoic sp2525a-2en/tr ........................................... -40 c to +85 c .................................................. 8-pin nsoic ordering information corporation analog excellence sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability aris ing out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 available in lead free packaging. to order add ?l?suffix to part number. example: sp2525a-1n/tr = standard; sp2525a-1n-l/tr = lead free /tr = tape and reel pack quantity is 2,000 for nsoic. click here to order samples
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