dimension (units : mm) description applications features sop8 power management switching ic 1) low on resistance switch: t yp.=50m 2) output current capacity: 2a (min.) 3) built-in each protection function, detection circuit 4) sop8 small package the BD6520F , bd6521f is a power management switching ic that includes low on resistance mosfet . soft start and discharge circuit are included. it reduces influence on the load when the output is switched on or off , and protect the circuit. compared with discrete component structure, board area can be reduced by each protection function which is necessary to control the power supply . sop8 overcurrent detection value uvlo t emperature protection circuit error detection output discharge circuit soft start circuit function BD6520F bd6521f 2a BD6520F/bd6521f 00w056a battery driven equipment such as notebook pc, pda july , 2000 * derating : 4.5mw/ ? c for operation above t a=25 ? c. this product is not designed for protection against radioactive rays. supply voltage ctrl input voltage storage temperature range power dissipation v dd v in t stg p d v v ? c mw ~ ~ 0.3 vdd+0.3 ~ +125 +6.0 0.3 55 450 * absolute maximum ratings (t a=25 ? c) parameter symbol limits unit
operating voltage range v dd v 3.0 ? 5.5 recommended operating conditions (t a=25 ? c) parameter symbol unit min. t yp. max. switch current i sw a 0 ? 2 operating temperature range t opr ? c e 25 ? +85 on resistance vdd operating current ctrl input voltage ctrl input current out rise delay time out rise time out fall delay time r on 1 r on 2 i dd i ddst v ctrl l v ctrl h i ctrl t rd t r tfd m ? m ? a a v v a s s s 220 2 0.7 ? 1 50 60 1 10 ? ? ? 0 1000 2000 3 ? ? ? ? ? 2.5 e 1 v dd =5v , v ctrl =5v , i out =2a v dd =3v , v ctrl =3v , i out =2a v ctrl =5v , out=open v ctrl =0v , out=open v ctrl l=low level v ctrl h=high level v ctrl =l, h rl=10 ? , ssctl=open out=10% ? 90% rl=10 ? , ssctl=open ctrl=h ? l ? out=50% BD6520F (unless otherwise noted : t a=25 ? c, v dd =5v) block diagram electrical characteristics conditions parameter symbol unit min. t yp. max. out fall time switch discharge resistance uvlo threshold uvlo hysteresis voltage over temperature threshold tf r swdc v uvlo h v uvlo l v hys t ts s ? v v mv ? c 600 2.7 2.5 300 ? 1 350 2.5 2.3 200 135 ? 2.3 2.1 100 ? rl=10 ? , ssctl=open out=90% ? 10% v dd =5v , v ctrl =0v , v out =5v v dd increasing v dd decreasing v hys =v uvlo h e v uvlo l v ctrl =5v rl=10 ? , ssctl=open ctrl=l ? h ? out=50% ? ? ? ? ? ? ? ? ? ? 5 vss 1 2 3 4 8 7 6 oscillator charge pump uvlo + e band gap thermal shutdown s q r ff vdda vddb ssctl ctrl out a outb outc BD6520F
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