Continue to Site

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.

Register Log in

how to trim for LDO output voltage high accuracy

Status
Not open for further replies.
A

azsxdc

Newbie level 4
Joined
Jul 15, 2008
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,314
Hello

I need to get LDO output voltage (Vout) high accuracy, how can I do?
for example, the reference is bandgap voltage (vbg).

1, if vbg temperature coefficient(Ts) and accuracy are both poor, do I need to trim vbg accuracy? or the other? or both?
then trim Vout ?
2, if vbg Ts is good, but accuracy is poor, do I need to trim vbg accuracy, then trim Vout, or trim Vout only?

I am also uncertain whether I only need to concern Vout Ts and accuracy? not concern Vbg?
to trim Vbg is only a method to get Vout high accuracy?

Hope your help.

Thank you very much.
 

You will want to trim tempco, and then you need to trim
VOUT to account for TC trim effects there. Unless you
have loose requirements and/or enough design passes to
get a "natural" well centered "good enough" reference.

Your trim method depends on what the foundry has for
qualified devices - fuses, antifuses (gate or zener zap),
laser trimmed thin film, etc.
 
  • Like
Reactions: azsxdc

    A

    azsxdc

    Points: 2
    Helpful Answer Positive Rating
waiting for more explain.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top