LMR14030-Q1: Resistor value of EN pin

Lee, Sam

Expert 6045 points

Part Number: LMR14030-Q1
Other Parts Discussed in Thread: LMR14030

Hi team,

Can you review the following configuration of LMR14030?

-. Is it possible to change the two resistors from 100kohm to 300kohm to reduce the power consumption?

Thanks,

Sam Lee

over 6 years ago

0 Jason Wang (BSR-MV) over 6 years ago

TI__Genius 9550 points

hi Sam,
Yes, you can use 300kohm in your circuit.

0 Lee, Sam over 6 years ago in reply to Jason Wang (BSR-MV)

TI__Expert 6045 points

Hi Jason,

Thank you for your answer.

One more question, can you tell me how much resistance we can use to reduce as much power as possible? 680kohm will be available as well? or more?

Thanks,
Sam Lee

0 Jason Wang (BSR-MV) over 6 years ago in reply to Lee, Sam

TI__Genius 9550 points

hi Sam,
Refer to datasheet page 11, "7.3.6 Enabel and Adjustable Under-voltage Lockout", EN has pull up current (1uA). So you can remove these two resistors. (if EN floating, EN voltage should be HIGH)
so the resistor's value depen's on "Voltage detector" performance. Check resistance when Voltage detector "High Z" status. The target is: EN is high when Voltage detector "High Z".

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LMR14030-Q1: Resistor value of EN pin