series m-78b-nz up to 9.75 watt | dc-dc converter 1 of 4 features: ? 3 pin sip package ? operating temperature -40c to +85c ? pin - out compatible with lm78xx linear regulators ? wide input range ? continuous short circuit protection ? very high efficiency up to 95% ? non-isolated regulated output ? low ripple and noise models model input voltage (v) output voltage (v) output current max (a) efficiency vin min (%) efficiency vin max (%) note: all specifications in this datasheet are measured at an ambient temperature of 25c, humidity<75%, nominal input voltage and at rated output load unless otherwise specified. input specifications input specificat ions nominal typical maximum units voltage range see the table above vdc filter capacitor quiescent current vin=(ll-hl) at full load 5 10 ma short circuit consumption 0.5 1.8 w output specifications output specifications conditions typical maximum u nits voltage accuracy 100% load 3 % short circuit protection continuous. short circuit restart auto recovery output current limit 5 a thermal shutdown internal ic junction 150 oc dynamic load stability 10 - 100% load 100 mv line voltage regulation vin=(ll-hl) at full load 0.75 % load voltage regulation 10 - 100% load 1 % temperature coefficient -40c to +85c ambient 0.02 %/ o c ripple & noise 20mhz bandwidth 4 5 mv p - p maximum capacitive load 1000 f general specifications input spe cifications conditions typical maximum units switching frequency 100% load 340 khz operating temperature with derating above 71c - 40 to +85 o c storage temperature -55 to +125 o c max case temperature 100 o c cooling free air convection humidity 95 % case material non-conductive black plastic (ul94-v0 rated) weight 4 g dimensions (l x w x h) 0.45 x 0.35 x 0.69 inch 11.50 x 8.90 x 17.50 mm mtbf > 2 000 000 hrs (mil-hdbk-217f, ground benign, t=+25c) soldering temperature 1.5 mm from case for 10 sec 300 o c www.make-ps.com e-mail:info@make-ps.com single output dc/dc converter m-78b2.5-nz m-78b3.3-nz m-78b6.5-nz 4.75-18 2.5 1.5 88 85 4.75-18 3.3 1.5 91 88 m-78b5.0-nz 6.5-18 8-18 5 6.5 1.5 1.5 93 95 91 93
2 of 4 pin out specifications pin single 1 +vin 2 gnd 3 +vout dimensions footprint dimensions are typical values: mm (inch) general tolerance: 0.25 ( 0.01) pin tolerance: 0.1 ( 0.004) div: 2.54 (0.1) 2.54 (0.10) 2 . 5 4 ( 0 . 1 0 ) ? 1.0 +0.15/-0 (? 0.04 + 0.006/-0 1 2 3 front view side view bottom view 11.50 (0.45 8.90 (0.35) 1 7 . 5 0 ( 0 . 6 9 ) 4 . 1 0 ( 0 . 1 6 ) 0.50 (0.024) 0 . 5 0 ( 0 . 0 2 4 ) 0 . 3 0 ( 0 . 0 1 2 ) 3.21 (0.13) 2.54 (0.10) 2 . 1 5 ( 0 . 0 9 ) make-ps www.make-ps.com e-mail:info@make-ps.com
3 of 4 derating typical application circuits c1: a low esr capacitor is required to keep the noise of the converter to a minimum. ceramic capacitors are recommended with typical value is 10f / 25v. c2: installation of c2 is recommended with typical value of 22f / 16v ceramic for 5v and 6.5v output signal and 22f / 6.3v ceramic for 2.5v and 3.3v output signal. note: this part is not designed for parallel operation. free air convection - 40 - 20 0 20 40 60 80 100 100 80 60 40 20 0 safe operating area o u t p u t p o w e r ( % ) 85 ambient temperature o c 71 c o m-78b-z www.make-ps.com e-mail:info@make-ps.com
4 of 4 dual output connection input filter output filter m-78b-z c1 +vin gnd c2 +vout gnd 10uf 22uf 1 2 3 c1 c2 10uf 22uf 1 2 3 -vout gnd c2 +vout gnd 22uf 1 2 3 c1 10uf c1 10uf c1 10uf 10uh ~ 47uh m-78b-z m-78b-z m-78b-z www.make-ps.com e-mail:info@make-ps.com
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