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TPS61252使用中出现的问题



           我想用输入3.3V的输入电压,获得3.6V的输出电压。FEDBACK是1.2V的,建一个R1=2R2的电阻网络即可。于是我选择了1K和2K的电阻,结果导致LDO输出电压下降,也就是说负载电流需求过大。后来在datasheet上了解到R2的阻值范围在180K左右,R1+R2的阻值不超过1M。那为什么用小电阻网络会消耗这么大的电流呢?