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TIOS1025: VCC_IN/OUT = 5V Electrical characteristics

Kai Nomiyama
Expert 5685 points

Part Number: TIOS1025
Other Parts Discussed in Thread: TIOS102, , TIOS1023

Hi Team,

TIOS102 datasheet 6.6 electrical characteristics typical vaolues are VCC_IN/OUT=3.3V.

Quesiton 1
Does abso max spec of electrical characteristics include VCC_IN/OUT=5V test condition as well?

Question 2
I(VCC) typical spec should be changed when we use VCC_IN/OUT=5V but are there any other parameter that typical spec is changed?

Question 3
This is related with question 2 but could you share typical spec value of VCC_IN/OUT=5V?

Regards,
Kai

  • 0
    TI__Guru 74302 points

    Nomiyama-san,

    An engineer has been notified of this thread and will respond by end of business on 09/14/2022.

    Regards,

    Eric Hackett 

  • 0 in reply to Eric Hackett
    TI__Expert 5685 points

    Hi Eric,

    sure, please let me know engineer feedback.

    Regards,

    Kai

  • 0 in reply to Kai Nomiyama
    TI__Guru 74302 points

    Kai,

    Sorry for the delay, this thread will be addressed on 09/15/2022.

    Regards,

    Eric Hackett

  • 0 in reply to Eric Hackett
    TI__Mastermind 35550 points

    Hello Nomiyama-san,

    Kai Nomiyama said:
    Quesiton 1
    Does abso max spec of electrical characteristics include VCC_IN/OUT=5V test condition as well?

    Yes, the absolute max specification covers all variants of the TIOS102 device (TIOS102, TIOS1023, and TIOS1025).

    Kai Nomiyama said:
    Question 2
    I(VCC) typical spec should be changed when we use VCC_IN/OUT=5V but are there any other parameter that typical spec is changed?

    I don't fully understand your question.  I(VCC_IN) is only applicable to the TIOS102 (non-LDO version of the device) because this is an power supply input pin that will sink current. 

    The TIOS1023 and TIOS1025 have a VCC_OUT pin which is an output pin of the internal LDO and it will source current up to a maximum of 20mA as specified in the I(VCC_OUT) spec.

    I don't understand why you think the I(VCC) typical spec should be changed with VCC_IN = 5V.  I also don't know of any specific parameters that are incorrectly specified that should have a separate 3.3V and 5V specification that is not currently outlined in the datasheet. The current consume should be the same for the 3.3V and 5V conditions, however the power consumed will be less in the 3.3V case due to the lower voltage.

    This is a preview device, so errors in the datasheet may exist, so if you have a specific parameter that you feel is incorrectly specified for the 3.3V and 5V, please let me know so that I can verify and have the documents revised.

    Kai Nomiyama said:
    Question 3
    This is related with question 2 but could you share typical spec value of VCC_IN/OUT=5V?

    The TIOS102 V(VCC_IN) typical (nominal) specs are 3.3V and 5V as specified.

    The TIOS1023 and TIOS1025 V(VCC_OUT) typical (nominal) specs are also 3.3V and 5V as specified.

    Regards,

    Jonathan

  • 0 in reply to Jonathan Nerger
    TI__Expert 5685 points

    Hi Jonathan,

    Regarding Question 2 and 3:
    from your descrition, I understand I(VCC) is only applicable to the TIOS102(no-LDO version).
    I thought 3.3V_VCC_IN current consumption and 5V_VCC_IN current consumption was different so I asked question 2 and 3 since if internal logic cosumes the same power, lower VCC voltage reqiures higher current.

    However, from below your comment, 3.3V and 5V current consumption is the same so I apply typical value as 3.3V and 5V condition.
    "The current consume should be the same for the 3.3V and 5V conditions, however the power consumed will be less in the 3.3V case due to the lower voltage."

    Regards,
    Kai

  • +1 in reply to Kai Nomiyama
    TI__Mastermind 35550 points

    Hello Nomiyama-san,

    I have reviewed the characterization data for the three different devices and the 3.3V and 5V conditions for the non-LDO version.  There is no noticeable difference to the current to the I(vcc) between the TIOS1023 and TIOS1025 devices. 

    The TIOS102 has slightly lower I(vcc) current as a result of some current comes from an external supply through the VCC_IN pin.  The TIOS102 I(vcc) is approximately 200uA less than the TIOS1023/5 devices.  However, there also was no noticeable difference in the TIOS102 I(vcc) as a result of VCC_IN = 3.3V or VCC_IN = 5V.

    As I've noted, the datasheet spec covers all devices.

    As a note, the LDO block shown in the TIOS102x (LDO version) block diagram, also exists in the TIOS102 (non-LDO version) of the device.  It is used to power the Diagnostics and Control block (or digital core) of the device.  This LDO has not been bonded out in the non-LDO version allowing the customer to set the interface voltage for the Control Logic to either 3.3V or 5V to match their micro controller voltage. 

    VCC_IN is not much more than a reference voltage for the logic pins, it does not consume much current (approximately 200uA) and it does not vary between the 3.3V and 5V conditions.  The majority of the device draws power from the VCC supply.

    Regards,

    Jonathan