ap450 2 channel linear controller with enable function this datasheet contains new product information. anachip corp. re serves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev. 1.0 may 11, 2004 1/6 ? features - 2 channel linear control circuitries - operating voltage can be up to 20v - under voltage lockout (uvlo) protection - current limit - over voltage protection - power good function - 1.25v/0.8v internal voltage reference - 8-pin pdip and sop pb-free packages ? applications - backlight inverter - lcd monitor - xdrom, xdsl product ? general description the ap450 series integrates two channel linear controllers into a single chip, mainly designs for power-supply regulator. all the functions included an on-chip 1.25v/0.8v reference output, error amplifier, uvlo, current limit. during low vcc situation, the uvlo makes sure that the outputs are off until the internal circuit is operational normally. ? pin assignment sop-8l/pdip-8l 1 2 3 45 6 7 8 (top view) en1/2 fb1 ap450 out1 fb2 out2 v ref gnd vcc ? pin descriptions pin name pin no. description gnd 1 signal ground en1/2 2 channel 1/2 enable pin out1 3 linear controller ch1output fb1, 2 4, 5 voltage feedback out2 6 linear controller ch2 output v ref 7 1.25v/0.8v output vcc 8 supply voltage ? ordering information ap450 x x x package packing n: pdip-8l s: sop-8l blank: tube a : taping bandgap version a: 1.25v bg b: 0.8v bg
ap450 2 channel linear controller with enable function anachip corp. www.anachip.com.tw rev. 1.0 ma y 11, 2004 2/6 ? block diagram bandgap reference amp + _ current limit buffer lpf amp + _ buffer lpf en1/2 fb2 fb1 gnd out1 out2 current limit uvlo vcc 1.25v/0.8v 2.5v v ref ? absolute maxi mum ratings symbol parameter rating unit v cc supply voltage 22 v v i amplifier input voltage 20 v v o1 / v o2 ch1 / ch1linear driver voltage to ground -0.3 Q v Q 20 v t op operating temperature range -20 to +85 o c t st storage temperature range -65 to +150 o c t lead lead temperature 1.6 mm(1/16 inch) from case for 10 seconds 260 o c ? recommended operat ing conditions symbol parameter min. max. unit v cc supply voltage 3.6 20 v v i amplifier input voltage 1.05 1.45 v v o1 / v o2 ch1 / ch2 linear driver voltage to ground - vcc-1.5 v i fb current into feedback terminal - 45 a r f feedback resistor 100 - k ? t op operating free-air temperature -20 85 oc
ap450 2 channel linear controller with enable function anachip corp. www.anachip.com.tw rev. 1.0 ma y 11, 2004 3/6 ? electrical characteristics (t a =25oc, v cc =6v) reference (ref) symbol parameter conditions min. typ. max. unit ap450a 1.225 1.25 1.275 v o1 / v o2 connect to fb1 / fb2 ap450b 0.784 0.800 0.816 v t a = -20oc ~ 25oc - -0.1 1 % v out1/2 output voltage change with temperature t a = 25oc ~ 85oc - -0.2 1 % under voltage lockout (uvlo) v ut upper threshold voltage (v cc ) - 2.9 - v v lw t lower threshold voltage (v cc ) - 2.4 - v v ht hysteresis (v cc ) i o(ref) = 0.1ma t a = 25oc - 500 - mv output section i cl1 ch1 current limit v cc =5v, v nout2 =v fb2 =0v 25 - - ma i cl2 ch2 current limit v cc =5v, v nout3 =v fb3 =0v 25 - - ma enable function v il low (regulator on) - 0.6 v v ih en pin logic input threshold voltage for en1/2 high (regulator off) 2.0 1.3 - v i il low (regulator on) - -0.03 - a i ih en pin logic input current for en1/2 high (regulator off) - 0.3 - a total device i cca average supply current - 5 7 ma thermal resistor sop8 - 90 - o c/w ja thermal resistor junction to ambient pdip8 - 60 - o c/w ? typical application circuit 1 2 3 4 gnd vcc 8 7 6 5 en1/2 fb1 fb2 out1 out2 v ref vcc=12v off on v out 3=1.8v 270 ? 220 f 3.3v 3.3v 220 ? 390 ? 180 ? v out 2=2.5v 0.1 f 220 f 220 f ap450b
ap450 2 channel linear controller with enable function anachip corp. www.anachip.com.tw rev. 1.0 ma y 11, 2004 4/6 ? typical characteristics reference output voltage v.s. power-supply voltage 0.795 0.7975 0.8 0.8025 0.805 4 6 8 101214161820 vcc-power supply voltage (v) vref- reference output voltage (v) average supply current v.s. power-supply voltage 0 1 2 3 4 5 0 4 8 12 16 20 vcc - power-supply voltgae (v) icc-average supply current (ma) average supply current v.s. ambient temperatrue 2 3 4 5 6 7 -50 -25 0 25 50 75 100 t a - ambient temperatrure( ) i cc - average supply current (ma) ? marking information (top view) sop-8l/pdip-8l ac ap450 x yy ww x logo part no. id code: internal year: "01" =2001 "02" =2002 xth week: 01~52 ~ 5 8 4 1 bandgap version a: 1.25v bg b: 0.8v bg
ap450 2 channel linear controller with enable function anachip corp. www.anachip.com.tw rev. 1.0 ma y 11, 2004 5/6 ? package information (1) pdip-8l (plastic dual-in-line package ) e1 d 7 (4x) a l a2 a1 b2 b1 b e s 15 (4x) e c eb e-pin o0.118 inch pin #1 indent o0.025 deep 0.006-0.008 inch dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a - - 5.33 - - 0.210 a1 0.38 - - 0.015 - - a2 3.1 3.30 3.5 0.122 0.130 0.138 b 0.36 0.46 0.56 0.014 0.018 0.022 b1 1.4 1.52 1.65 0.055 0.060 0.065 b2 0.81 0.99 1.14 0.032 0.039 0.045 c 0.20 0.25 0.36 0.008 0.010 0.014 d 9.02 9.27 9.53 0.355 0.365 0.375 e 7.62 7.94 8.26 0.300 0.313 0.325 e1 6.15 6.35 6.55 0.242 0.250 0.258 e - 2.54 - - 0.100 - l 2.92 3.3 3.81 0.115 0.130 0.150 eb 8.38 8.89 9.40 0.330 0.350 0.370 s 0.71 0.84 0.97 0.028 0.033 0.038
ap450 2 channel linear controller with enable function anachip corp. www.anachip.com.tw rev. 1.0 ma y 11, 2004 6/6 ? package information (continued) (2) sop- 8l(jedec small outline package) view "a" l c view "a" h e a a2 a1 b e d 7 (4x) 0.015x45 7 (4x) y dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.40 1.60 1.75 0.055 0.063 0.069 a1 0.10 - 0.25 0.040 - 0.100 a2 1.30 1.45 1. 50 0.051 0.057 0.059 b 0.33 0.41 0.51 0.013 0.016 0.020 c 0.19 0.20 0.25 0.0075 0.008 0.010 d 4.80 5.05 5.30 0.189 0.199 0.209 e 3.70 3.90 4.10 0.146 0.154 0.161 e - 1.27 - - 0.050 - h 5.79 5.99 6.20 0.228 0.236 0.244 l 0.38 0.71 1.27 0.015 0.028 0.050 y - - 0.10 - - 0.004 0 o - 8 o 0 o - 8 o
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