LM5050-1: LM5050-1 Static current measurement method

Kevin Huang8

Part Number: LM5050-1

Hi Team,

When IN1=42V, IN2=0V
I measured the quiescent current of IN1 pin to be 4.168mA,
Query the datasheet to know that LVS & LIN & Iout are all uA current levels,
Want to ask where is the quiescent current 4.168mA?
How to measure it?

over 3 years ago

0 Praveen GD over 3 years ago

TI__Guru 57737 points

Hi Kevin,

For the LM5050-1 in the IN1 power path, the leakage current would be = I_VS + I_IN = 100uA + 320uA

For the LM5050-1 in the IN2 power path, the leakage current would be = 3.5mA. The reason for this leakage current is described in detail in datasheet sections - 'NOTE' and '8.2.4 Reverse Input Voltage Protection With IQ Reduction' as shown below.

You can also refer to the e2e FAQ below for more understanding on this topic,

LM5050-1: LM5050-1 Leakage Current

https://e2e.ti.com/support/power-management/f/power-management-forum/994560/faq-lm5050-1-lm5050-1-leakage-current

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LM5050-1: LM5050-1 Static current measurement method