2006. 7. 6 1/6 semiconductor technical data revision no : 1 150khz 1a step-down dc/dc converter. the kia2575 series are monolithic ic that design for a step-down dc/dc converter,and own the ability of driving a 1a load without additional transistor component. due to reducing the number of external component, the board space can be saved easily. the external shutdown function can be controlled by logic level and then come into standby mode. the internal compensation makes feedback control have good line and load regulation without external design. regarding protected function,thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. the kia2575 series operates at a switching frequency of 150khz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. d pak-5 a b e d f i j l dim millimeters a b c d e i 8.0 0.5 0.15 0~0.25 f j l m n o 0~0.15 8.8 0.2 + _ 9.8 0.2 + _ 15 0.3 + _ 5.0 0.2 + _ 1.7 0.1 + _ 4.0 0.2 + _ 1.27 0.13 + _ + _ g 0.8 0.1 + _ 6.7 k q r 1.27 0.1 + _ 7.85 2.3 0.3 + _ c k q g r n m o 2 1 2 3 3 4 5 heat sink is common to gnd kia2575fp/pi00 ~ kia2575fp/pi12 bipolar linear integrated circuit features output voltage : 3.3v, 5v, 12v and adjustable output version. adjustable version output voltage range, 1.23v to 37v 150k fixed switching frequency. voltage mode non-synchronous pwm control. thermal-shutdown and current-limit protection. on/off shutdown control input. operating voltage can be up to 40v. output load current. : 1a to-220-5 and d 2 pak-5 packages. low power standby mode. application simple high-efficiency step-down regulator. on-card switching regulators. positive to negative converter. to-220is-5 f g b d h e i k m j o p l n a c dim millimeters a b c d e f g h i 1.5 1.7 5.0 2.0 j k l m n o p 0.5 3.5 0.1 + _ 3.2 0.2 + _ 4.5 0.2 + _ 2.8 0.2 + _ 3.2 0.5 + _ 0.8 0.1 + _ 8.2 0.7 + _ 24.6 0.2 + _ 10 0.2 + _ 5.0 0.5 + _ 16.5 0.5 + _ 1 2 3 4 5 line up item output voltage (v) package * kia2575fp/pi00 adjustable (1.23~37v) fp : d 2 pak-5 pi : to-220is-5 * kia2575fp/pi33 3.3 kia2575fp/pi50 5.0 * kia2575fp/pi12 12.0 note) * : under development.
2006. 7. 6 2/6 kia2575fp/pi00 ~ kia2575fp/pi12 revision no : 1 application circuit v in c in 680 f v in = 12v v in = 12v l1 33uh gnd on/off fb output kia2575fp33 d1 smab33 d1 smab33 v out = 3.3v/3a v out = 3.3v/3a c o 220 f v in l1 33 h gnd fb r1 r2 output kia2575fp00 c o 4 1 2 3 5 4 1 2 3 5 on/off 220 f c in 680 f [on/off control function] gnd : output on high : output off [on/off control function] gnd : output on high : output off v out = v fb (1 + ) r1 r2 v fb = 1.23v r 2 = 1k ?3 k ? r 1 < 1k ? connection (topview) 1 - input 4 - feed back 3 - ground 2 - output 5 - on/off 1 - input 4 - feed bac k 3 - ground 2 - output 5 - on/off (1) fixed type circuit (2) adjustable type circuit d 2 pak-5 package to-220is-5 package
2006. 7. 6 3/6 kia2575fp/pi00 ~ kia2575fp/pi12 revision no : 1 absolute maximum ratings electrical characteristics unless otherwise specified, v in =12v for 3.3v, 5v, adjustable version and v in =24v for the 12v version. i load = 0.2a characteristic symbol test condition min. typ. max. unit feedback bias current i fb v fb =1.3v (adjustable version only) - 40 60 na 100 oscillator frequency f osc - 127 150 173 khz saturation voltage v sat i out =3a, no outside circuit v fb =0v force driver on - 1.3 1.4 v 1.5 max. duty cycle (on) dc v fb =0v force driver on - 100 - % max. duty cycle (off) v fb =12v force driver off - 0 - current limit i limit peak current no outside circuit v fb =0v force driver on 1.7 2.2 3.3 a output = 0 output leakage current i l no outside circuit, v fb =12v force driver off - - 50 a output = -1 v in =40v - 2 30 ma quiescent current i q v fb =12v force driver off - 5 10 ma standby quiescent current i stby on/off pin=5v v in =40v - 300 500 a 600 on/off pin logic input threshold voltage v il low (regulator on) - 1.3 0.6 v v ih high (regulator off) 2.0 - on/off pin logic input current i h v logic =2.5v (off) - 5 15 a on/off pin input current i l v logic =0.5v (on) - 0.02 5 electrical characteristics characteristic symbol test condition typ. limit unit output feedback kia2575fp/pi00 v fb 5v 2006. 7. 6 4/6 kia2575fp/pi00 ~ kia2575fp/pi12 revision no : 1 output voltage change (%) -1.0 -1.5 0 0.5 1.0 1.5 -0.5 normalized output voltage 025 75 50 -25 -50 100 125 junction temperature ( ) c c v in =20v i load = 1a normalized at t j =25 20 010 30 25 515 3540 efficiency input voltage(v) efficency (%) 80 90 70 65 85 95 75 5v 3.5v output voltage change (%) switch current (a) 0.6 0.9 0.7 1.0 1.3 1.4 1.2 1.1 0.8 2 01 4 3 switch saturation voltage 125 c 25 c t j = -40 c v in = 12v switch current limit supply current (ma) 5.0 4.5 3.5 4.0 5.5 025 75 50 -25 -50 100 125 junction temperature ( ) c junction temperature ( ) c v in = 12v v out = 5v input - output differential (v) 0 1.0 0.8 1.2 1.6 1.4 dropout voltage 025 75 50 -25 -50 100 125 i load = 3a i load = 1a l =68 h r ind = 0.04 ? v out = v reg = 50mv output voltage change (%) output voltage (v) 0.6 0 -0.2 -0.4 -0.6 0.4 1.0 0.2 1.4 1.2 0.8 20 0 10 30405060 line regulation c i load =500ma tj=25 3.3v, 5v, 12v & adj
2006. 7. 6 5/6 kia2575fp/pi00 ~ kia2575fp/pi12 revision no : 1 4 3 1 0 2 5 input voltage (v) minimum operating voltage 025 75 50 -25 -50 100 125 junction temperature ( ) c v out = 1.23v i load = 120ma operating quiescent current supply current (ma) 20 12 0 4 16 8 24 025 75 50 -25 -50 100 125 junction temperature ( ) c 5v < v in < 40v i switch = 0 switch on switch off shutdown quiescent current current ( a) 400 200 0 50 300 100 500 030 10 20 40 supply voltage (v) v on/off = 5v t j = 25 c t j = -40 and 125 c c 2.0 1.5 0.5 0 1.0 2.5 threshold voltage (v) 025 75 50 -25 -50 100 125 025 75 50 -25 -50 100 125 junction temperature ( ) c on off on/off threshold voltage 7 6 4 3 2 1 0 5 8 current ( a) 10 15 20 5 025 on/off pin current (sinking) on/off pin voltage (v) v in =40v -40 t j 125 c c 150 50 0 100 200 junction temperature ( ) c switching frequency frequency (khz)
2006. 7. 6 6/6 kia2575fp/pi00 ~ kia2575fp/pi12 revision no : 1 feedback pin bias current feedback bias current (na) 7.5 5.0 2.5 -2.5 0 -5.0 10 025 75 50 -25 -50 100 125 junction temperature ( ) c c adjustable version only power dissipation-1 (to-220is-5) power dissipation-2 (d 2 pak-5) power dissipation p d (w) 0 5 10 15 20 ambient temperature ta ( ) -25 0 150 50 100 thermal resistance j-c 8.33 j-a 83.3 c/w power dissipation p d (w) 0 5 10 15 20 25 30 35 40 ambient temperature ta ( ) -25 0 25 150 50 75 125 100 thermal resistance j-c 3.6 j-a 62.5 c/w c
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