EV6400DJ-00A programmable-delay supervisory circuit evaluation board EV6400DJ-00A rev. 1.1 www.monolithicpower.com 1 12/11/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. the future of analog ic technology description the EV6400DJ-00A is an evaluation board of mp6400. it is designed for voltage supervisory application with low quiescent current and programmable reset delay time. the circuit monitors the sense voltage (vsen) with vcc from 1.8v to 6v. the mr (manual reset) function could introduce an external digital signal to control the reset output. the reset delay time could be programmed by the external capacitor. the monitored voltage vsen could be set from 0.4v through r1 and r2, and the delay time could be programmable from 2.1ms to 10s through c2. on the EV6400DJ-00A, the monitored voltage is set at 3.3v and reset delay time at 100ms. electrical specifications parameter symbol value units input voltage range vcc 1.8 ? 6 v sense voltage range vsen 3.3 v features ? adjustable monitored voltage from 0.4v ? programmable reset delay time from 2.1ms to 10s ? optional manual reset ? immune to short negative sense voltage applications ? dsp or micro controller applications ? laptop/desktop computers ? pdas/hand-held products ? portable/battery-powered products ? fpga/asic applications ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. EV6400DJ-00A evaluation board dimensions (2.0?x x 2.0?y x 0.5?z) (5.0cm x 5.0cm x 1.2cm) board number mps ic number EV6400DJ-00A mp6400dj
EV6400DJ-00A ? programmable-delay supervisory circuit evaluation board EV6400DJ-00A rev. 1.1 www.monolithicpower.com 2 12/11/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. evaluation board schematic mp6400 vcc sense reset gnd c delay mr v cc v cc v cc mr gnd gnd vsen vsen r6 nc r7 nc r4 nc m1 nc c5 1uf c3 0.1uf c1 10nf c2 10nf c4 47pf vreset cdelay gnd 6 5 1 2 4 3 EV6400DJ-00A bill of materials qty ref value description package manufacturer manufacturer p/n 2 c1, c2 10nf ceramic cap., 16v, x7r sm0603 murata grm188r71c103ka01d 1 c3 0.1uf ceramic cap., 16v, x7r sm0603 murata grm188r71c104ka01d 1 c4 47pf ceramic cap., 50v, c0g sm0603 murata grm1885c1h470ja01d 1 c5 1uf ceramic cap., 10v, x7r sm0603 murata grm188r71a105ka61d 1 r1 143k ? film res., 1% sm0603 yageo rc0603fr-07143kl 1 r2 20k ? film res., 1% sm0603 yageo rc0603fr-0720kl 1 r3 100k ? film res., 1% sm0603 yageo rc0603fr-07100kl 3 r4, r6, r7 do not stuff 1 r5 0 ? film res., 1% sm0603 yageo rc0603fr-070rl 1 m1 do not stuff u1 supervisory circuit tsot-6 mps mp6400dj
EV6400DJ-00A ? programmable-delay supervisory circuit evaluation board EV6400DJ-00A rev. 1.1 www.monolithicpower.com 3 12/11/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
EV6400DJ-00A ? programmable-delay supervisory circuit evaluation board notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV6400DJ-00A rev. 1.1 www.monolithicpower.com 4 12/11/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. quick start guide (adjustable version) 1. attach the positive and negative ends of the monitored voltage to the vsen and gnd pins, respectively. 2. attach the input voltage (1.8v v cc 6v) and input ground to the vcc and gnd pins, respectively. 3. to use the mr function, apply a digital input to the mr pin. drive mr higher than 0.7vcc to turn on the supervisory circuit or less than 0.25vcc to turn it off. the mr is connected to vcc through a 90k ? resistor inside of the chip. floating the mr pin means high. 4. to adjust the monitored voltage vsen, change the values of r1 and r2. for r2 = 20k ? , r1 can be determined by: () 2 0 k r 1 v s e n 0 . 4 v 0 . 4 v =? quick start guide (fixed version) for modifying the EV6400DJ-00A to accommodate a fixed version of the mp6400: 1. carefully remove the ic(u1) and replace it with the corresponding fixed version of the mp6400 chip. 2. remove both r1 and r2. 3. short r1 while leaving r2 open. 4. attach the positive and negative ends of the monitored voltage to the vsen and gnd pins, respectively. 5. attach the input voltage (1.8v v cc 6v) and input ground to the vcc and gnd pins, respectively. 6. to use the mr function, apply a digital input to the mr pin. drive mr higher than 0.7vcc to turn on the supervisory circuit or less than 0.25vcc to turn it off. the mr is connected to vcc through a 90k ? resistor inside of the chip. floating the mr pin means high.
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