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TPS5401: Voltage output issue with TPS5401

Part Number: TPS5401

Following are our specifications:

Input Voltage Range: 6V to 24V

Output Voltage: 5V

Output Load Current: 0.1A

Created a snapshot of our design created in the web designer.

The crosses in the above design indicates the components we have changed. changed values have also been indicated in the above snapshot.

We have included the above circuit in our design. We have fabricated and assembled 5 boards. Following are our observations.

1. 1 board directly has a output of 5V for the entire input range of 6-24V. 

2. 4 boards gave output of 5V till the input of 10V and beyond 10V, the output voltage drops to much less value. The voltage drop at output is not common across the boards, some give 3V, some 2V, some 3.5V. and etc.

We are unsure what is happening beyond 10V with this regulator on the board. Please, help us to understand if we are missing any key design considerations.