I designed a 3.3V regulator using the TPS63001 and components sugested by WEBENCH. The power is supplied by an one cell Li-ion Battery. But it doesn't work. The battery voltage is 3.4V. The waveform at pin 4 (L1) shows around 450kHz signal. And worse, without load (when my circuit is in sleep mode), the regulator, only it, drains 3.8mA from battery. At work, the load drains around 25mA. Attached are the schematic, the circuit layout and the waveform at pin L1. The part numbers of C32~C35 is 0603ZD106KAT2A from AVX and the inductor is VLS4012HBX-3R3M from TDK.