TLV766-Q1: TLV766-Q1

Hello,

The dropout voltage will typically be less than 300mV for 300mA load current.  In your application you have at least 2x margin to the worst case dropout voltage needed.  There are no issues here.

The minimum effective capacitance on the output is 0.5 uF.  Your values of 10uF on the input and output is fine.  An input capacitor is not required for stability but it is considered good practice to include it.  You can add 100nF parallel capacitors to your 10uF capacitors provided that the impedance of the 10uF // 100nF capacitor does not droop below 2 m-ohms.

The ground current will approximately be 1.2mA at room temperature, give or take based on your operating temperature.

Thanks,

Stephen

How to understand this Dropout voltage 0.3 -0.75?

Hi Rackshith,

The dropout voltage plot (Figures 6-11 and 6-12 in the datasheet) provide curves for -50C, -40C, 0C, 25C, 55C, 85C, 125C and 150C.  In my previous reply, I referred to "typical" as 25C.  At 125C the dropout will typically be approximately 390mV.

The table snapshot you have provided gives the worst case conditions.  750 mV dropout requires that your load current is 500 mA, you are operating at maximum temperature (150C) and you have a large enough sample size to see an unusually large value of dropout due to tolerance.  Dropout increases with load current so at 300 mA you will not see 750mV as your dropout spec.  Figures 6-11 and 6-12 give a more common range of dropout voltages.  I hope this helps.

Thanks,

Stephen