TPS65266-1: Support PCI Express M.2 specification Rev.4

Tamio Yokokura

Part Number: TPS65266-1

Hi, TPS65266-1 support team

I am thinking to suggest TPS65266-1 to customer as the power solution for the power supply of PCI Express SDD. But I have a concern if TPS65266-1 can support the power on sequence of PCI Express M.2 specification Rev4.
Could you check the specification and give me your comments?

Thanks

Tamio

4.4.1. BGA SSD Voltage Supply Power-on Sequencing.pdf

over 3 years ago

0 Vincent Zhang(BSR) over 3 years ago

TI__Expert 4795 points

Hi Tamio,

I'm looking into it and will feedback to you next Monday. Thanks.

0 Ruby Li over 3 years ago

TI__Expert 7430 points

Hi Tamio

One thing to confirm, is the voltage in steady state of PWR.2 3.3V and PWR.3 1.8V? I think the power on sequence can be achieved by connecting different capacitors to the EN pins (refer to Fig 27 in datasheet). I want to know the voltage value to check the power off sequence.

Ruby

0 Tamio Yokokura over 3 years ago

TI__Expert 3690 points

Hi, Ruby,

I am checking the voltage of PWR_2 and PWR_3 to customer now. Please wait a moment.

Thanks

Tamio

0 Ruby Li over 3 years ago in reply to Tamio Yokokura

TI__Expert 7430 points

Hi Tamio

Sure.

Ruby

0 Tamio Yokokura over 3 years ago

TI__Expert 3690 points

HI, Ruby,

I received PWR_x voltage information from customer as follows. They use 4 kinds of SSD, but 2 SSDs of them is the same voltage.

SSD　＃	#1	#2	#3	#4
PWR_1 Voltage	3.3V	3.3V	3.3V	2.5V
PWR_2 Voltage	1.8V	1.8V	1.8V	1.8V
PWR_3 Voltage	1.2V	0.9V	0.9V	0.8V
PWR_ID Configuration	ID0=NC, ID1=NC, ID2=GND, ID3=GND, ID4=GND	ID0=GND, ID1=NC, ID2=NC, ID3=GND, ID4=GND	ID0=GND, ID1=NC, ID2=NC, ID3=GND, ID4=GND	Pin D15 : NC, Pin F15 : GND, Pin H14 : GND, Pin C14 : GND, Pin C13 : NC

Please check if the power-on and power-off sequencing can meet to the PCIe specification.

If you have more information, please let us know about that.

Thanks

Tamio

0 Zhao Ma over 3 years ago in reply to Tamio Yokokura

TI__Genius 15135 points

Hi, Tamio-san

TPS65266-1 has dedicated EN1/2/3 pin which allows flexible power sequence.

So you can apply enable signal at EN1/2/3 pin to achieve the sequence of PCI Express M.2 specification Rev4.

0 Tamio Yokokura over 3 years ago in reply to Zhao Ma

TI__Expert 3690 points

Hi, Zhao

Thank you for your comments.

I think that the I want to design the schematic and sequence for a customer using TPS65266-1.

Thanks

Tamio

Power management

Power management forum

TPS65266-1: Support PCI Express M.2 specification Rev.4