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TPS63002 damages easily in production

Other Parts Discussed in Thread: TPS63002

Hello,

We're using TPS63002 to generate 5v / 0.5A (peak) from Li-ION battery  (see below schematics)

We see that the device is damaged in high percentage ~40%!!! in production.

In a functional circuit, we can see 5v on VOUT_5V and measure large resistance [Kohm] between L22 and GND.

In failing circuit the VOUT_5V is at 2.3V and we see short ~58 [ohm] between L22 and GND, in parallel to high current consumption.

 manually removing each device and soldering a new one solves the issue permanently.

We've manufactured ~70 units till now.

Any idea what might be wrong ????

Any replacement IC that might not be that sensitive???

 

Thanks in advance for your help!

Gal