Dear ST Team,
As the title of this article suggests, I have encountered an issue where the standby power consumption of the ST original VL53L1X-SATEL far exceeds the value stated in the datasheet. The first image below shows the power consumption data, and the second image is the power consumption description of the device from the datasheet.
In my attempts, I have not made any hardware modifications to the VL53L1X-SATEL nor used an MCU to communicate or write to the registers of VL53L1X. I connected XSDN_I to the power GND to enter the hardware shutdown mode, with an input voltage of 2.8V. According to the power consumption parameters in the second image, I am puzzled because the value is much higher than what is stated in the datasheet.
Additionally, I noticed that the VL53L1X-SATEL has a voltage regulator and level-shifting chip. I shorted R21 to bypass the power consumption of the voltage regulator module, but the power consumption was still over a hundred microamps, which does not align with the datasheet. I then separated the VL53L1X-SATEL at the middle soldering hole (removing the 0R resistor first, and it should not have damaged the chip), and directly supplied 2.8V to the VDD and GND pins. However, the power consumption did not improve.
My question is: why does the power consumption remain so high even after entering hardware shutdown mode? What steps should I take to achieve low power consumption?
1 ACCEPTED SOLUTION
Accepted Solutions
As a software guy, I'm always worried about these questions, but...
The VL53L1X-SATEL is not what is in the datasheet. It has too many parts on it.
But you can actually break the board in half and solder to the 'fingers' on the end of the board. ( remove the 0-ohm resistors at the perforation and simply break the board in half. That will eliminate all the level shifters and regulators on the board. Most of those parts on the board enable it to connect to any MCU. But if you have an Nucelo-F401RE, you can connect the fingers of the half-board and get a better measure.
Lowering the Xshut pin will turn off the clocks in the part and get you into the lowest power.
It's an interesting experiment.
In AppNote AN6049 on the ST web site there is connection diagram. (It's for the VL53L4, but the parts are interchangeable.
I'd use this diagram. And monitor the power consumption as you ground the XShut pin.
- john
As a software guy, I'm always worried about these questions, but...
The VL53L1X-SATEL is not what is in the datasheet. It has too many parts on it.
But you can actually break the board in half and solder to the 'fingers' on the end of the board. ( remove the 0-ohm resistors at the perforation and simply break the board in half. That will eliminate all the level shifters and regulators on the board. Most of those parts on the board enable it to connect to any MCU. But if you have an Nucelo-F401RE, you can connect the fingers of the half-board and get a better measure.
Lowering the Xshut pin will turn off the clocks in the part and get you into the lowest power.
It's an interesting experiment.
In AppNote AN6049 on the ST web site there is connection diagram. (It's for the VL53L4, but the parts are interchangeable.
I'd use this diagram. And monitor the power consumption as you ground the XShut pin.
- john
