How to improve the load current capacity of LDO

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ysiq

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Hi all,

I am optimizing a LDO with 5v ouput voltage and 100mA output curent. beacuse I want to cut dwon the pass element in order to reduce the chip size, how to keep the 100mA output current?

thanks!
 

ysiq said:
Hi all,

I am optimizing a LDO with 5v ouput voltage and 100mA output curent. beacuse I want to cut dwon the pass element in order to reduce the chip size, how to keep the 100mA output current?

thanks!
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what is the pass element you used in the LDO? And, BJT or MOS?
 

Do you have to have the pass element on-chip? If not, you can just provide a pin to drive an external pass transistor. This pin would provide base current (for BJT pass) or gate voltage (for a FET pass).
 

If you embeded the PMOS on your chip , You must have margin for your design , The Pass componet , Like PMOS must have 200mA ~300mA cability .
 

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