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TPS798-Q1: Input capacitance

Part Number: TPS798-Q1
Other Parts Discussed in Thread: TPS7A16-Q1

Dear all,

one of my customer is going to use the TPS79801-Q1 in the following application:

The input supply will vary between approximately 3 and 6 volts. (Must be tolerant of a higher, non-repetitive, pulse around 40 volts)
Output is required to be 2.5V, current draw should be below 20mA.

The load will vary but it is not currently know how much by.

The designer would use the device without the input capacitance, in the datasheet there are some picutures which show this possible usage.

Is it possible to remove the input cap ?

Are there any drawback ?

Can you alternatuvely suggest another part which does not require input capacitance ?

regards,

Domenico