CSD95490Q5MC: LSET resistor design & VOS pin layout suggestion

Roy Hsu

Genius 9180 points

Part Number: CSD95490Q5MC

Hi there,

As title, I got two questions regarding CSD95490.

1. Could you please advise how to design the LSET resistance?

2. What’s the layout rule for CSD95490Q5MC VOS pin? Should we route it close to the load?

Thank you!

Best regards,

Roy Hsu

over 6 years ago

0 Brett Barr1 over 6 years ago

TI__Mastermind 18200 points

Roy,
I'm looking into this - should have an answer for you within 24 hours.

0 Brett Barr1 over 6 years ago in reply to Brett Barr1

TI__Mastermind 18200 points

Roy,
Here is the equation for selecting LSET:

RLSET [kΩ] = 2.04e-9 * L4 – 2.48e-6 * L3 +1.79e-3 * L2 + 3.99e-1 * L + 1.61e1
L - Output Inductor Value in nH
RLSET - Ideal Resistor value to connect from LSET terminal to GND (Closest standard resistor value may be used)

VOS should be connected to the output at the inductor pad.

Power management

Power management forum

CSD95490Q5MC: LSET resistor design & VOS pin layout suggestion