TPS63060: request to measure PHASE MARGIN of TPS63060DSCT

Dexter Choi

Expert 2795 points

Part Number: TPS63060

Dear Sir,

could you help measure PHASE MARGIN of TPS63060DSCT as below condition.

Input: Voltage: 3.6V~4.2V
Output: voltage: 3.3V
Current: 200mA~300mA

over 6 years ago

0 Milos over 6 years ago

TI__Expert 7925 points

Hi Dexter,

Please allow us a few days to make these measurements. In the meantime, it would be useful if you could give us the exact part number of the 22 µF capacitor.

Best regards,
Milos

0 Dexter Choi over 6 years ago in reply to Milos

Expert 2795 points

Dear Milos,

please refer to the below part number of the 22uF capacitor.

CL10A226MP8NUNC

1608 10V dc X5R 22μF ±20%

0 Milos over 6 years ago in reply to Dexter Choi

TI__Expert 7925 points

Hi Dexter,

These are the phase margin measurement results:

Vin [V]	Iout [mA]	f_c [kHz]	PM [°]
3.6	200	18.6	44
3.6	300	19.4	38
4.2	200	18.1	49
4.2	300	20.4	40

The results may be slightly different for your circuit, due to different capacitance tolerance and voltage derating.

With PM around 40° you might see a few oscillations (initial + 1-2 bumps) in the load transient response, but this is normal. If you want to improve the phase margin, refer to this application note:
http://www.ti.com/lit/an/slva289b/slva289b.pdf

Best regards,
Milos

Power management

Power management forum

TPS63060: request to measure PHASE MARGIN of TPS63060DSCT