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SC4521EVB Datasheet(PDF) 11 Page - Semtech Corporation |
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SC4521EVB Datasheet(HTML) 11 Page - Semtech Corporation |
11 / 18 page 11 2007 Semtech Corp. www.semtech.com POWER MANAGEMENT SC4521 Application Information (Cont.) Design Example 1: 5V to 1V at 2A s l a i r e t a M f o ll i B m e t Iy t Qe c n e r e f e Re u l a Vr e r u t c a f u n a M /. o N t r a P 11 1 CR 7 X , 5 0 8 0 , V 5 2 , F u 2 2 . 0X X K 4 2 2 Y 5 0 8 0 J V : y a h s i V 21 o CA Z , V 0 1 , F u 0 7 4n o c i b u R 31 3 CF u 0 1T M 6 0 1 J O 6 1 2 3 C : K D T 41 4 CV 5 2 , R 7 X , 5 0 8 0 , F n 8 1y a h s i V 51 5 C5 0 8 0 , V 0 5 , F p 0 6 5y a h s i V 61 1 D3 2 3 D O S , W S 8 4 1 4 N 1 71 2 D2 0 A L 0 3 C E. p r o C s c i n o r t c e l E r e t n I n o h i N 81 1 LH u 9 . 3L 9 R 3 - P N D 5 7 8 R C R : a d i m u S 91 0 R5 0 8 0 , 0 0 11 1 R5 0 8 0 , % 1 , k 9 4 . 2E N O Z T M S 1 11 2 R5 0 8 0 , % 1 , k 0 1 2 11 3 R5 0 8 0 , % 1 , k 0 2 3 1- 4 R5 0 8 0 , d e s u t o n 4 11 s s CF n 0 0 1 5 11 1 U1 2 5 4 C Sh c e t m e S . e g a k c a p 5 0 8 0 h ti w n o i s i c e r p % 1 e v a h s r o t s i s e r ll a , d e if i c e p s s s e l n U % 0 2 - / + e r a s r o ti c a p a c ll a d n a % 1 - / + e r a s r o t s i s e R C1 0.22u SC4521 IN 2 SW 3 EN 5 FB 6 COMP 7 SS 8 R1 2.49k R3 20k C4 18n Co 470u D2 L1 3.9uH C5 560p VI = 5V Vo=1V @2A C3 10u D1 R0 0 R2 10k Css 100n C1 0.22u SC4521 IN 2 SW 3 EN 5 FB 6 COMP 7 SS 8 R1 2.49k R3 20k C4 18n Co 470u D2 L1 3.9uH C5 560p VI = 5V Vo=1V @2A C3 10u D1 R0 0 R2 10k Css 100n Note: The bottom pad needs a big copper area to remove the heat. |
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