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OPA1642: vs. OPA1652 Output voltage vs. Output current

Part Number: OPA1642
Other Parts Discussed in Thread: OPA1652

Hi team,

The following two sets of Output Voltage vs. Output Current characteristic curves seem to behave in opposite manners. 

For OPA1642, the output current (limit) appears to increase with increasing temperature.

For OPA1652, the output current (limit) appears to decrease with increasing temperature.

Why is that?

Thanks,

Sarah