TPS3899: spec check

Hello,

I believe the issue is TPS3899DL30DSER has a fixed sense threshold of 3V but there is a resistor divider on the sense input. With a 3.3V input to the resistor divider, the sense pin is only seeing 0.57V and the device is detecting low. Please use the adjustable TPS3899DL01DSER. The TPS3899DL01DSER has a sense threshold of 0.505V and the resistor divider can be adjusted so that the device detects at the correct voltage.

Thanks,

Walter

Hello,

For the TPS3899DL30DSER sense has to be pulled under 3V to trigger reset. For the TPS3899DL01DSER sense has to be pulled under 0.505V to trigger reset. You can use the reset delay delay and the TPS3899PH01 to get a similar waveform. 

The TPS3422 has similar functionality to MIC2788 but with a longer 7.5s delay time.

Thanks,

Walter

No this part does not have a manual reset function. TPS3899 is reset when sense is below the threshold. Our TPS3808E device has both a sense pin and manual reset.

Thanks,

Walter