Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

How to improve the load current capacity of LDO

Status
Not open for further replies.

ysiq

Newbie level 3
Joined
Dec 21, 2005
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,301
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!
 

dennislau

Member level 1
Joined
Dec 16, 2005
Messages
34
Helped
3
Reputation
6
Reaction score
2
Trophy points
1,288
Activity points
1,634
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!

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

v_c

Advanced Member level 2
Joined
Oct 11, 2005
Messages
514
Helped
113
Reputation
226
Reaction score
37
Trophy points
1,308
Location
Chicago, IL, USA
Activity points
8,229
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).
 

mitgrace

Full Member level 6
Joined
May 8, 2004
Messages
370
Helped
6
Reputation
12
Reaction score
2
Trophy points
1,298
Activity points
2,538
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 .
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top