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现在有设计，用两节5号（AA）电池供电输入，输出为5V，300-500mA，希望效率高，空载电流小，布局面积小的芯片，因为需要用在手持设备中。
HI
可以借助TI的Webench在线仿真选型，其中有标识效率和占用空间：
你可以选择TPS61253， TPS61236P之类：
http://www.ti.com/lit/ds/symlink/tps61253.pdf
http://www.ti.com/product/tps61236p
