MIC94050/94051 micrel september 2004 1 MIC94050/94051 MIC94050/94051 4-terminal tinyfet? p-channel mosfet final general description the MIC94050 and mic94051 are 4-terminal silicon gate p-channel mosfets that provide low on-resistance in a very small package. designed for high-side switch applications where space is critical, the MIC94050/1 exhibits an on-resistance of typically 0.125 ? at 4.5v gate-to-source voltage. the MIC94050/1 also operates with only 1.8v gate-to-source voltage. the MIC94050 is the basic 4-lead p-channel mosfet. the mic94051 is a variation that includes an internal gate pull-up resistor that can reduce the system parts count in many applications. the 4-terminal sot-143 package permits a substrate con- nection separate from the source connection. this 4-terminal configuration improves the ja (improved heat dissipation) and makes reverse-blocking switch applications practical. the small size, low threshold, and low r ds(on) make the MIC94050/1 the ideal choice for pcmcia, usb, back-up battery-power, and distributed power management applica- tions. features 0.125 ? typical on-resistance at 4.5v gate-to-source voltage operates with 1.8v gate-to-source voltage separate substrate connection allows reverse-blocking applications distributed power management pcmcia card power management usb ports battery-powered computers, peripherals handheld bar-code scanners portable communications equipment reverse blocking battery management ordering information part number temp. range* package pb-free MIC94050bm4 ?0 c to +150 c sot-143 no mic94051bm4 ?0 c to +150 c sot-143 no MIC94050ym4 ?0 c to +150 c sot-143 yes mic94051ym4 ?0 to +150 c sot-143 yes * operating junction temperature gate source drain substrate schematic symbol MIC94050 mic94051 schematic symbol pin configuration sot-143 package (m4) t ypical pcb layout s d g ss pcb heat sink plane improves heat dissipation pcb traces g s d ss ~350k ? internal gate-to-source pull-up resistor g s d ss functional diagrams substrate source gate drain p5x part identification part number identification MIC94050bm4 p50 mic94051bm4 p51 MIC94050ym4 p50 mic94051ym4 p51 micrel, inc. ? 1849 fortune drive ? san jose, ca 95131 ? usa ? tel + 1 (408) 944-0800 ? fax + 1 (408) 944-0970 ? http://www.mic rel.com tinyfet is a trademark of micrel, inc.
MIC94050/94051 micrel MIC94050/94051 2 september 2004 electrical characteristics (note 1) symbol parameter condition (note 1) min typ max units v gs gate threshold voltage v ds = v gs , i d = ?50 a 0.5 1.2 v i gss gate-body leakage v ds = 0v, v gs = ?.5v, note 2 , note 3 1 a r gs gate-source resistance v ds = 0v, v gs = ?.5v, note 2 , note 4 200 350 500 k ? c iss input capacitance v gs = 0v, v ds = ?.5v 600 pf i dss zero gate voltage drain current v ds = ?.5v, v gs = 0v 1 a v ds = ?.5v, v gs = 0v, t j = 85 c5 a r ds(on) drain-source on-resistance v gs = ?.5v, i d = ?00ma 0.125 0.160 ? v gs = ?.6v, i d = ?00ma 0.135 0.180 ? v gs = ?.5v, i d = ?00ma 0.165 0.200 ? v gs = ?.8v, i d = ?00ma 0.225 0.280 ? g fs forward transconductance v ds = ?.5v, i d = ?00ma, note 5 3s note 1. t a = 25 c unless noted. substrate connected to source for all conditions. note 2. esd gate protection diode conducts during positive gate-to-source voltage excursions. ic devices are inherently esd sensitive. handling precautions required note 3. MIC94050 only. note 4. mic94051 only. note 5. pulse test: pulse width 80 s, duty cycle 0.5%. absolute maximum ratings drain-to-source voltage ................................................ ?v gate-to-source voltage ................................................ ?v continuous drain current t a = 25 c (v gs = 4.5v) ............................................ 1.8a t a = 100 c (v gs = 4.5v) .......................................... 1.2a total power dissipation t a = 25 c ............................................................ 568mw t a = 100 c .......................................................... 227mw operating junction temperature ............. ?0 c to +150 c storage temperature ............................... ?5 c to +150 c esd rating, note 2 operating ratings thermal resistance ja ...................................................................................... 220 c/w jc ..................................................................................... 130 c/w
MIC94050/94051 micrel september 2004 3 MIC94050/94051 t ypical characteristics 0 1 2 3 4 5 6 7 8 9 10 012345 i d (a) drain-to-source voltage (v) drain characteristics 1.5v gs 2.0v gs 2.5v gs 3.0v gs 3.5v gs 0 100 200 300 400 500 600 700 800 900 1000 0123456 r ds(on) (m ? ) gate-to-source voltage (v) on-resistance vs. gate-to-source voltage i d = 1a i d = 100ma 0 100 200 300 400 500 0 1234 r ds(on) (m ? ) drain current (a) r ds(on) vs. drain current 2.5v gs 3.3v gs 1.8v gs 4.2v gs 0 0.5 1 1.5 2 2.5 0 1234 drain-source diode v f (v) drain-source current (a) source drain diode forward voltage drop vs. current 100 s pulse 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -60 -40 -20 0 20 40 60 80 100 120 140 160 gate threshold (v) temperature ( c) gate threshold vs. temperature i d = ?50 a 0.7 0.8 0.9 1 1.1 1.2 1.3 -40 -15 10 35 60 85 110 135 r ds(on) (normalized) temperature ( c) r ds(on) variance vs. temperature v ds 3.v i d 0.1a
MIC94050/94051 micrel MIC94050/94051 4 september 2004 t ypical applications load +5v 74hc04 on off * substrate must be connected to source s ss* d g MIC94050 figure 1. load switch application load +5v open drain output * substrate must be connected to source s ss* d g mic94051 internal resistor figure 2. load switch application (with internal gate-source pull-up) +4v on off s ss d g MIC94050 +2.7v to 3.6v li coin cell on off s ss d g MIC94050 load 2m ? ab output off off 0v on off +4v off on li coin cell on on dont! a b figure 3. reverse-blocking battery back-up application
MIC94050/94051 micrel september 2004 5 MIC94050/94051 package information 0.150 (0.0059) 0.089 (0.0035) 8 0 0.400 (0.016) typ 3 places 2.50 (0.098) 2.10 (0.083) 1.40 (0.055) 1.20 (0.047) 0.950 (0.0374) typ 3.05 (0.120) 2.67 (0.105) 0.800 (0.031) typ 1.12 (0.044) 0.81 (0.032) 0.10 (0.004) 0.013 (0.0005) dimensions: mm (inch) 0.41 (0.016) 0.13 (0.005) c l c l sot-143 (m4) micrel, inc. 1849 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 web http://www.micrel.com this information is believed to be accurate and reliable, however no responsibility is assumed by micrel for its use nor for an y infringement of patents or other rights of third parties resulting from its use. no license is granted by implication or otherwise under any patent or pat ent right of micrel, inc. ?2002 micrel, incorporated
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