ws4601 80m , current limited, power distribution switch descriptions the ws4601 is high - side switch with ultra - low on r esistance p - mosfet. integrated current - limit function can limit inrush current for heave capacitive load, over load current, and short - circuit current to protect power source. the ws4601 is also integrated reverse protection function to eliminate any reverse current flow across the switch when the device is off. output auto - discharge while the device shutdown made output voltage off qui ckly. thermal shutdown function can protect the device and load. the ws4601 is available in sot - 23 - 5l pac kage. standard product is pb - free and halogen - free. features ? input voltage range : 2.5~5.5 ? main switch r on : 80m @ v in =5v ? continue output current : 1.0a ? current limit threshold : 1.5a (typ.) ? current limit accurate : +/ - 20% ? o utput short current : 0.7a (typ.) ? auto discharge ? reverse block (no body diode ) ? over temperature protection applications ? usb periphera ls ? usb dongle ? usb 3g data card ? 3.3v or 5v power switch ? 3.3v or 5v power distribution sot - 23 - 5l pin configuration (top view) 4601 = device code yy = year code ww = week code marking order i nformation device package shipping WS4601E - 5/tr sot - 23 - 5l 3000/reel&tape 1 2 3 4 5 o u t g n d e n i n f l g 1 2 3 4 5 4 6 0 1 y y w w 1 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification 1 2 3 4 5 o u t g n d e n i n f l g 1 2 3 4 5 4 6 0 1 y y w w
typical applications pin descriptions pin number symbol descriptions 1 out output pin 2 gnd ground 3 flg fault flag pin, open - drain, active low 4 en enable pin, active high 5 in input pin block diagram i n o u t c u r r e n t s e n s e d r i v e r u v l o + - i n o u t r e v e r s e v o l t a g e p r o t e c t i o n t h e r m a l p r o t e c t i o n d e g l i t c h c u r r e n t l i m i t f l g e n g n d 1 2 3 4 5 o u t g n d e n i n v i n v o u t o f f o n r 1 1 0 k 1 0 0 k f a u l t c i n 1 u f c o u t 1 u f f l g ws4601 2 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification i n o u t c u r r e n t s e n s e d r i v e r u v l o + - i n o u t r e v e r s e v o l t a g e p r o t e c t i o n t h e r m a l p r o t e c t i o n d e g l i t c h c u r r e n t l i m i t f l g e n g n d 1 2 3 4 5 o u t g n d e n i n v i n v o u t o f f o n r 1 1 0 k 1 0 0 k f a u l t c i n 1 u f c o u t 1 u f f l g
absolute maximum ratings these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. recommend operating conditions parameter symbol value unit in pin voltage r ange v in - 0.3 6.5 v out pin voltage range v out - 0.3~6.5 v flg pin voltage range v flg - 0.3~6.5 v en pin voltage range v en - 0.3~6.5 v junction temperature t j - 40~150 o c lead temperature(soldering, 10s) t l 260 o c storage temperature tstg - 55 ~ 150 o c in, out pin esd ratings hbm 8000 v mm 400 v flg, en pin esd ratings hbm 4000 v mm 400 v parameter symbol value unit supply input voltage r ange v in 2.5 5.5 v operating ambient temperature t a - 40 85 o c thermal resistance r ja 250 o c/w ws4601 3 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
electroni cs characteristics (ta=25 o c, v in= 5v, c in =c out =1uf, unless otherwise noted) parameter symbol conditions min. typ. max. units quiescent supply current i q i out =0, v in =v en = 5v 48 60 ua shutdown current i sd v en =0v 1 ua reverse current i rev v in =v en =0v, v ou t =5v, current flow to v in 1 ua main - fet on resistance (1) r on v in =v en =5v, i out =500ma 80 m auto - discharge fet on resistance r dchg v en =0v, v in =v out =5v 65 over - current trip threshold i oc current ramp ( 100a/s) on out 1.2 1.5 1.8 a short - circuit output current i o s out shorted to gnd 0.7 a short circuit current limiting response time t short out connected to gnd c l =1uf 3 us en input low voltage v il vin=5v 0.4 v en input high voltage v ih vin=5v 2.0 v out pin turn - on time after en on t on c l =1uf, r l =5ohm 20 us fault flag output blanking time t blank 8 ms over - temperature shut down threshold t sd 160 o c over - temperature threshold hysteresis t hys 35 o c under voltage lock out threshold v uvlo 2.2 v under voltage lock out hysteresis v uvlo - hys 200 mv (1) pulse test, t p =380us ws4601 4 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical characteristics (ta=25 o c, unless otherwise noted) on resistance vs. input voltage quiescent current vs. input voltage shut - down current vs. temperature on resistance vs. temperature quiescent current vs. te mperature shut - down current vs. input voltage 2.5 3.0 3.5 4.0 4.5 5.0 5.5 70 75 80 85 90 95 100 105 t a = 25 o c r on (m ? ) input voltage(v) iout=1a iout=0.5a -50 -25 0 25 50 75 100 125 50 60 70 80 90 100 110 120 r on (m ? ) temperature(c 0 ) v in =5v i out =0.5a 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 10 20 30 40 50 60 70 80 quiescent current(ua) input voltage(v) no load -50 -25 0 25 50 75 100 125 30 35 40 45 50 55 60 quiescent current(ua) temperature(c 0 ) v in =5v i o =0ma -50 -25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 shutdown current(ua) temperature(c 0 ) v in =5v i o =0ma 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.00 0.01 0.02 0.03 0.04 0.05 shutdown current(ua) input voltage(v) t a = 25 o c i o = 0ma ws4601 5 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification 2.5 3.0 3.5 4.0 4.5 5.0 5.5 70 75 80 85 90 95 100 105 t a = 25 o c r on (m : ) input voltage(v) iout=1a iout=0.5a -50 -25 0 25 50 75 100 125 50 60 70 80 90 100 110 120 r on (m : ) temperature(c 0 ) v in =5v i out =0.5a 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 10 20 30 40 50 60 70 80 quiescent current(ua) input voltage(v) no load -50 -25 0 25 50 75 100 125 30 35 40 45 50 55 60 quiescent current(ua) temperature(c 0 ) v in =5v i o =0ma -50 -25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 shutdown current(ua) temperature(c 0 ) v in =5v i o =0ma 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.00 0.01 0.02 0.03 0.04 0.05 shutdown current(ua) input voltage(v) t a = 25 o c i o = 0ma
current limit vs. input voltage output voltage vs. output current fault flag blanking time vs. temperature current limit vs. temperatur e en threshold vs. input voltage fault flag blanking time vs. temperature 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.4 0.6 0.8 1.0 1.2 1.4 1.6 v en (v) input voltage(v) en v ih en v il 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 current limit(a) input voltage(v) t a = 25 o c -50 -25 0 25 50 75 100 125 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 current limit(a) temperature(c 0 ) v in =5v -40 -20 0 20 40 60 80 100 0 2 4 6 8 10 12 14 16 flg delay time(ms) temperature(c 0 ) v in =5v i o =0ma 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 2 4 6 8 10 12 14 16 i o = 0ma flg delay time(ms) input voltage(v) t a = 25 o c 0 200 400 600 800 1000 1200 1400 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v out (v) i out (ma) v in =5v t a = 25 o c ws4601 6 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.4 0.6 0.8 1.0 1.2 1.4 1.6 v en (v) input voltage(v) en v ih en v il 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 current limit(a) input voltage(v) t a = 25 o c -50 -25 0 25 50 75 100 125 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 current limit(a) temperature(c 0 ) v in =5v -40 -20 0 20 40 60 80 100 0 2 4 6 8 10 12 14 16 flg delay time(ms) temperature(c 0 ) v in =5v i o =0ma 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 2 4 6 8 10 12 14 16 i o = 0ma flg delay time(ms) input voltage(v) t a = 25 o c 0 200 400 600 800 1000 1200 1400 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v out (v) i out (ma) v in =5v t a = 25 o c
startup from power on startup from enable on shutdown from power off current limit response startup from power on startup from enable on shutdown from enable off short circuit response ws4601 7 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
operation information power switch the power switch is an p - channel mosfet with low r ds(on) for power m anagement or usb power distribu tion applications. the ws4601 has re verse voltage protection to prevents current flow from out to in and in to out when device is off. current - limit protection the ws4601 provide current limit protection fun ction to protect power source when over - current condition occurs. short - circuit protection the ws4601 provide short circuit protection function. the output current will be limited to safe level. the short - circuit protection is used to reduce power dissipation of the device and protect power source duri ng short - circuit condition. fault indicate the flg open drain output is asserted (active low) with 8ms(typ.) delay when an over - current or over - temperature condition is encountered. the flg signal will remain asserted until the over - current or over - tem perature condition is removed. uvlo protection to avoid malfunction of the ws4601 at low input voltages, an under voltage lockout is included that disables the device, until the input voltage exceeds 2.2v (typ.). shutdown mode drive en to gnd to place the ws4601 in shutdown mode. in shutdown mode, input current falls to smaller than 1ua. thermal shutdown as soon as the junction temperature (t j ) exceeds 160 o c (typ.), the ws4601 goes into thermal shutdown. in this mode, the device is turned off and will turn on again until junction temperature falls below 125 o c (typ.). ws4601 8 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
application information input capacitor a 1uf input bypass ceramic capacitor (c in ) from in to gnd, located near the ws4601 is strongly recommended t o suppress the voltage overshooting during short circuit fault event. without the bypass capacitor, the output short may cause sufficient ringing on the input (from supply lead inductance) to damage the device. output capacitor a low esr, 150uf aluminum electrolytic or tantalum between out and gnd is strongly recommended to reduce the voltage droop during hot - plug of downstream peripheral. higher value output capacitor is better when the output load is heavy. additionally, bypassing the output with a 1u f ceramic capacitor improves the immunity of the device to short - circuit transients. pcb layout consideration the pcb layout should be carefully performed to maximize thermal dissipation and to minimize voltage drop . the following guidelines must be considered: 1. please place the input capacitors near the in pin as close as possible. 2. output decoupling capacitors for load must be placed near the load as close as possible for decoupling high frequency ripples. 3. locate ws4 601 and output capacitors near the load to reduce parasitic resistance and inductance for excellent load transient performance. 4. the negative pins of the input and output capacitors and the gnd pin must be connected to the ground plane of the load. 5. keep in and out traces as wide and short as possible. ws4601 9 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
package outline dimensions sot - 23 - 5l symbol dimensions in millimeter min. typ. max. a 1.050 - 1.250 a1 0.000 - 0.100 a2 1.050 - 1.150 b 0.300 - 0.500 c 0 .100 - 0.200 d 2.820 2.900 3.020 e 1.500 1.600 1.700 e1 2.650 2.800 2.950 e 0.950(bsc) e1 1.800 - 2.000 l 0.300 - 0.600 0 - 8 ws4601 10 of 10 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
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