Hello guys,
One of my customers is evaluating LM76002 using the device EVM for their next products.
Their evaluation conditions are follows.
- EVM parts were not changed from default values.
- VIN=48V.
- VOUT=3.3V
- IOUT=0A
- in Forced PWM mode
They have the following questions about LM76002. Could you please answer the questions?
Q1. Does any current flow from PVIN to internal LDO when 5V DC is supplied to BIAS terminal from external?
Q2. They found that VCC voltage changed from 3.1V to 3.27V when VOUT reached to the target voltage (3.3V) at starting up.
They think LM76002 is in AUTO (PFM) mode during starting up. Is it correct?
If the answer is yes, why does LM76002 start in AUTO mode in spite of FPWM mode setting?
Q3 When the EVM started up with 0A load, about 50mV overshoot was observed at the end of start up.
Is this a normal phenomenon? If yes, is there any counter-measure against the overshoot?
Q4. Do you dhave any data of the device each terminal open/short test?
Your reply would be much appreciated.
Best regards,
Kazuya.