mitsumi regulator+reset ic mm1437 regulator+reset ic monolithic ic mm1437 outline this ic combines a low saturation 5v regulator, adapted for low power consumption, and a reset function (regulator output monitoring), for which there is significant market need, that uses the built-in 4.2v, 4.5v and 4.7v detection delay circuit. features 1. small input/output voltage difference 0.25v typ. 2. high input voltage 18v max. 3. internal thermal shutdown circuit. 4. internal current-limiting circuit. 5. adjustment-free reset detection voltage a rank: 4.2v typ. b rank: 4.5v typ. c rank: 4.7v typ. 6. easy to set delay time from voltage detection to reset release. package sop-7 sip-5 applications pin assignment tv, monitors, air conditioners, others. mitsumi 14 23 765 sop - 7 sip-5 12345 1 gnd 2 reset 3 cd 4 v in 5 v out 6 gnd 7 n.c 1 reset 2 cd 3 v in 4 v out 5 gnd
mitsumi regulator+reset ic mm1437 equivalent circuit diagram pin description pin no. pin name functions equivalent circuit diagram 1 (sop - 7) gnd gnd pin 5 (sip - 5) 2 (sop - 7) reset output pin voltage detection output 1 (sip - 5) v out pin voltage detection output pin reset pin logic 3 (sop - 7) cd delay time capacitor pin 2 (sip - 5) t plh = 100000 ?c t plh : transmission delay time [s] c: capacitor value [f] 4 (sop - 7) v in voltage supply input pin 3 (sip - 5) 5 (sop - 7) v out regulator output pin 4 (sip - 5) 6 (sop - 7) gnd gnd pin 7 (sop - 7) n.c reset v out vs h reset pin output delay time can be set by the capacitance connected to the cd pin.
mitsumi regulator+reset ic mm1437 absolute maximum ratings mitsumi recommended operating conditions item symbol ratings unit operating temperature t opr - 20~+85 c storage temperature t stg - 40~+125 c supply voltage v cc - 0.3~+18 v output current i out 200 ma power dissipation pd 650 * mw item symbol ratings unit operating temperature t op - 20~+85 c output current i op 0~150 ma operating voltage v op 2~16 v electrical characteristics (typical model mm1437a) (except where noted otherwise, ta=25?) item symbol measurement conditions min. typ. max. unit no-load input current 1 iccq1 v in =6v i out =0ma 400 800 ? no-load input current 2 iccq2 v in =4v i out =0ma 2.5 ma regulator output voltage v out v in =6v i out =30ma 4.90 5.00 5.10 v input-output differential voltage vi0 v in =4.8v i out =150 ma 0.25 0.50 v line regulation v1 v in =6v~10v i out =30ma 10 30 mv load regulation v2 v in =6v i out =0~150ma 40 80 mv vo temperature v out / t tj= - 20~+85 c coefficient * 1 v in =6v i out =30ma 100 ppm/ c ripple rejection * 1 rr v in =6v f=120hz v ripple =1v p - p , i out =30ma 50 60 db output noise voltage * 1 vn v in =6v, f=20~80khz i out =30ma 200 400 ?rms reset detecting voltage vs v in =h l 4.03 4.2 4.37 v vs temperature coefficient * 1 vs/ t tj= - 20~+85 c 100 ppm/ c hysteresis voltage vs v out =h l h 25 50 100 mv low-level output voltage v ol v out =3.9v 100 200 mv reset delay time t plh cd=0.1? 5 10 15 ms "l" transmission delay time * 1 t phl cd=0.1? 30 90 s threshold operating voltage v opl vol=0.4v 0.65 0.85 v note: * when mounted on a 55 20 mm paper phenol board (sop-7) when mounted on a 45 45 mm paper phenol board (sip-5) note 1: design guaranteed
mitsumi regulator+reset ic mm1437 mitsumi measuring circuit (typical package sip-5) application circuit note 1 : this regulator is not internally compensated and thus requires an external output-capacitor (c out ) for stability. note 2 : reset- terminal with a built-in pull-up resistance (10k ? ).
mitsumi regulator+reset ic mm1437 mitsumi timing chart t plh t plh 0v 5v 0v vs 5v 0v 5v 10v v in v out reset vs
mitsumi regulator+reset ic mm1437 mitsumi characteristics (typical model mm1437a) detection voltage (i out =0ma) input voltage (v) 6 5 4 3 2 1 0 01234567 v out reset output voltage (v) quiescent current (i out =0ma) input voltage (v) 3 2.5 2 1.5 1 0.5 0 0246 810121416 quiescent current (ma) line regulation input voltage (v) 30 20 10 0 - 10 - 20 - 30 4 6 8 10121416 line regulation (mv) load regulation output current (ma) 60 40 20 0 - 20 - 40 - 60 0 50 100 150 load regulation (mv) ripple rejection frequency (h z ) 100 90 80 70 60 50 40 30 20 10 0 10 100 1000 10000 100000 ripple rejection (db) current limit output current (ma) 6 5 4 3 2 1 0 0 50 100 150 200 250 300 output voltage (v) reset delay time cd-capacitor ( f) 100 10 1 0.01 0.1 1 deyal time (ms) allowable loss temperature ( c) 800 700 600 500 400 300 200 100 0 - 25 0 25 50 75 100 125 allowable loss (mw) on board 55 22mm (sop)/45 45mm (sip)
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