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tps65250/1,你看看咋样，够用吗？
, n2 r& z4 |+ M6 S, _
5 I; @! P0 o! V1 m* l* Q IInput Supply Voltage Range
; ~3 O. j, O$ O( s. L! J+ p(4.5 V - 18 V)( r& U8 f4 i7 A. v( t
0.8 V, 1% Accuracy Reference( q# [' C/ i* n) j# v
Continuous Loading: 3 A (Buck 1),
8 e+ d) D5 D: S7 F% V. _0 U2 A (Buck 2 and 3)
8 _# E: F0 D/ V) f# x2 F# u; \Maximum Current: 3.5 A (Buck 1), " }! \7 W+ T) G9 A3 t% [0 x) i
2.5 A (Buck 2 and 3)
: p/ @5 s0 U* J* xAdjustable Switching Frequency # j1 p9 G' w' @" m9 E
300 kHz - 2.2 MHz Set By External Resistor
) s6 Q% e( U3 H% F o5 v. WExternal Synchronization Pin for Oscillator3 Q0 K) A3 Y$ x* g& @) e
External Enable/Sequencing and Soft Start Pins
$ s6 c3 P0 x x# UAdjustable Current Limit Set By External Resistor
+ a- G$ h6 r/ CSoft Start Pins
* V) I8 \4 Z% t, C8 W! ?Current-Mode Control With Simple Compensation Circuit, S9 i2 e1 r* E3 c5 p4 C
Power Good and Reset Generator
8 Y8 e) ?* P `& {# HStorage and Release Circuit Optimized for Reduction of Storage " J, z7 v8 l. Q6 v1 [
Capacitance in Dying Gasp Mode (Option) E& V3 F4 c0 {% }+ }
Low Power Mode Set By External Signal
9 k/ p. J9 K- i2 y% q. r6 _QFN Package, 40-Pin 6 mm x 6 mm RHA |
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发表于 2013-8-20 22:18
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支持！
反对！
发表于 2013-8-22 08:23
楼主