TPS61202: Blows the inductor (latched internal driver?) under load

Part Number: TPS61202

I'm using the chip in a power bank design with a single Li-pol battery to drive 5V out for phone charging.  It works fine with 20mA LED load (around 5.6V) but smokes the chip and inductor when a phone is connected (high load).  I'm not an experienced power designer.  Did I do something dumb?

"Do or do not, there is no try."  - Yoda

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