TPS3899: Replace MIC2788

GARETH OU

Mastermind 9965 points

Part Number: TPS3899

Could you help suggest replacement products for MIC2788-XYMT The customer wants delay 2 seconds

9 months ago

0 Walter Zollinger 9 months ago

TI__Expert 7470 points

Hello,

The TPS3899 can be configured to have a 2 second sense delay by placing a 3uF capacitor on the CTS pin. The sense pin will be the push button input.

Best,

Walter

0 GARETH OU 9 months ago in reply to Walter Zollinger

Mastermind 9965 points

Hi Walter

If choose 3V DL (TPS3899DL30DSER), will REST# occur if the input is lower than 3V? ?

How to set the values of R1 and R2? Thanks

0 Walter Zollinger 9 months ago in reply to GARETH OU

TI__Expert 7470 points

Hello,

If you use the fixed threshold TPS3899DL30DSER, reset will be pulled low when the voltage on the sense pin falls below 3V. There is no need for the R1 and R2 resistors with this part. The R1 and R2 resistors are necessary to set the threshold if using the adjustable TPS3899DL01DSER. The R1 and R2 resistor divider is set so that the the voltage at the sense pin = 0.505V at the desired threshold voltage

Best,

Walter

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TPS3899: Replace MIC2788