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建议使用MP2145,很多大公司都在用.8 M( ^* t+ z5 R. V% p9 F9 J2 N* v
Up to 6A Output Current; h `) C7 l; `- D* w8 M
Wide 2.8V-to-5.5V Operating Input Range' K( M4 ~1 u. i. T+ n% X
20mΩ and 12mΩ Internal Power MOSFETs0 a. c, N' ?* o8 X. C
40μA Quiescent Current& h q, ?+ B$ P' M
1.2MHz Fixed Switching Frequency- u8 t) q3 v4 z% `
1% Feedback Accuracy
3 f' k5 Z8 P% L3 t External Mode Control
9 B4 c. X# F+ `' B External VCON Control
4 V! M4 l" a' c0 B. C1 N Adjustable Output from 0.6V. H: K9 q& j# E& {" ?5 J9 m
1.5ms Internal SS Time with Pre-Bias Startup
' d5 w+ R$ n; e; D8 U Cycle-by-Cycle Over Current Protection3 b- P ?* K" C. J
Short Circuit Protection with Hiccup Mode
* o: L: f8 |- y& k) ^, K Stable with Low-ESR Output Ceramic% p9 }" e- c c
Capacitors q6 [$ B7 _. ^1 j6 I, G" L4 X0 |% B
Thermal Shutdown
2 }2 {' D4 y( D G$ I8 T# B% S0 a6 S2 q Available in a 2mm×3mm QFN Package5 Y: H2 P5 b9 X1 }
Output Discharge Function
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发表于 2015-5-13 14:24
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支持！
反对！
发表于 2015-5-14 16:38
