Can I operate my IC above the recommended maximum ambient temperature (which is usually 85 C) if I keep the junction temperature below the recommended maximum (which is usually 125 C)?
Are the electrical characteristics specified in this case?
Yes and Yes.
For the TPS62xxx devices, the electrical characteristics are tested, characterized, and specified over the recommended junction temperature range. The recommended ambient temperature is a legacy parameter but still has some use. Generally, operating below the maximum recommended ambient temperature with a good thermal layout will keep the maximum junction temperature below the recommended maximum.
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