FAQ

Q 

What is the PGOOD feature of ADP2386?

A 

The PGOOD is an active high, open-drain output that requires an external
resistor to pull it up to a voltage. A pull-up resistor between 10k to 100k is
recommended.
A logic high on the PGOOD pin indicates…

Q 

Can I leave the SS pin open?

A 

Yes.
ADP2386 will use internal soft start when SS pin is left open. Follow the
attached equation to get the internal soft start time.
Where fSW  is the switching frequency of ADP2386.

Attachments:

Q 

Is it OK to leave PGOOD pin open?

A 

Yes, the PGOOD pin can be left open if not used.

Q 

How do I set the switching frequency?

A 

The switching frequency of ADP2386 is controlled by the RT pin.
A resistor from RT pin to GND can program the switching frequency according to
the attached equation.

Attachments:

Q 

How do I program soft start time of ADP2386?

A 

Connect an external capacitor from SS pin to GND to program the soft start
time. Follow the attached equation to get the soft start time.

Attachments:

Q 

Is it OK to leave RT pin open?

A 

No.
It is always recommended to connect a resistor between RT pin and GND to get a
stable operation.

Q 

What is the fastest soft start time that ADP2386 can achieve?

A 

ADP2386 always chooses the slower soft start between internal SS time and
external programmed SS time.
If external SS time is programmed faster than internal SS time, the ADP2386

Q 

What is the deglitch time when PGOOD reversing?

A 

The deglitch time of PGOOD from low to high is 1024 clock cycles and the
deglitch time of PGOOD from high to low is 16 clock cycles.

I would like to post a video on hand soldering the ADP2384 IC. This part is a little different because it has two belly pads. To make matters difficult they are different nets, GND and Switch node. If a short occurs under the chip, it’s time to replace…