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Why would you want to waste power? Normally you just have to provide current to the load; usually there's no need to sink current. But may be you've got a different application?
If the LDO delivers a pulse signal frm 0mA to 300mA. The load transient has a drop and then an overshoot.
Without a push-pull stage, the overshoot will be pretty high.
But I am wondering is my consideration of the overshoot in general important for LDOs?
And how much power loss is expected for adding a class AB stage?
If you want to get pretty load transient, you need to improve Error AMP and driver blocks for Power MOS. I don't think push-pull stage is good solution for that.
Class AB is one of solution. Another solution is adding a comparator for overshoot detecting.
Of cos, overshoot suppression is important for LDO design.
Quescient current could be increased with class AB. However, it depends on your design.
If the LDO delivers a pulse signal frm 0mA to 300mA. The load transient has a drop and then an overshoot.
Without a push-pull stage, the overshoot will be pretty high.
But I am wondering is my consideration of the overshoot in general important for LDOs?
And how much power loss is expected for adding a class AB stage?
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