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LDO
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  • Forum Post: Using TPS65070's Switcher to Power '674x's Memory Controller and DDR2

    Charles Gervasi
    All the I/O in my design is 3.3V. I'm using the TPS65070 to power the '674x and an Altera FPGA. I hoped someone could tell me if I'm on the wrong track. Where I deviate from the reference design is in red . DC-DC#1: 3.3V/600mA - I power the I/O and all other 3.3V off this. I believe 600mA...
    on Nov 18, 2010

  • Forum Post: Re: TPS65051 LDO1 is leaking although enable is low?

    Daniel Acevedo
    No problem. I agree, since the output is low when E28 is not there and EN_VLDO1 is low, this leads me to believe that this is something with the load. The leakage should be negligible through Vbatt.
    on Feb 1, 2011

  • Forum Post: Re: A problem about TPS65023 and 61130

    Daniel Acevedo
    The LDOs may be connected to the output of the switching converter instead of MAIN-BAT to minimize the power dissipation in the linear regulators; this reduces the difference between Vin and Vout and therefore reduces the wasted power in the LDO. This is typical since our switching converters have...
    on Apr 11, 2011

  • Forum Post: Re: A problem about TPS65023 and 61130

    Daniel Acevedo
    You can power the LDOs directly from the 5V, just make sure the junction temperature stays below 125C and you meet the processor's sequencing requirements. You can also use the TPS65023 converter output to power the LDO; keep in mind though that you can have up to 300mV of dropout across each...
    on Apr 13, 2011

  • Wiki Page: TPS65720 PSRR of LDO

    Daniel Acevedo
    Q: TPS65720 PSRR of LDO by 30435 need this information which is not in the datasheet A: Re: TPS65720 PSRR of LDO by 10449 The TPS65720 LDO are based on the LDOs in the TPS657051 and TPS657052. The TPS657051 LDO PSRR is attached to this post. (Please visit the site to view this file)
    on May 5, 2011

  • Forum Post: Re: TPS65023 LDO's PSRR

    Daniel Acevedo
    The PSRR data for the TPS65023 and the TPS65050 LDOs are visible in the following graph:
    on May 19, 2011

  • Forum Post: Re: TPS65023 LDO's PSRR

    Daniel Acevedo
    No. Sorry. There are no LDO output noise measurements. You can however get an EVM, measure and design with margin.
    on May 24, 2011

  • Forum Post: Re: TPS65820 PMU

    Daniel Acevedo
    I don't see any reason why you can't use the open-drain PWM outputs to sink the LED current as long as you don't exceed the Vol spec of 150mA.
    on May 31, 2011

  • Forum Post: Re: TPS65820 PMU

    Daniel Acevedo
    For LDO outputs less than 3.3V: You can indeed use an output voltage less than 3.6V for VIN_LDO35. If VIN_LDO02 < 3.6V, the 3.3V fixed LDO0 will not be accurate but if you don't need it then VIN_LDO02 < 3.6 V is ok to evaulate in your system. LDO_PM is also fixed at 3.3V but powered...
    on Jun 11, 2011

  • Wiki Page: TPS65820 LDO VIN

    Daniel Acevedo
    Q: On page 5, VLDO12 and VLDO35 require "Greater of: 3.6V or minimum input = voltage required for LDO..."? This means that if I need 3.6V min, it will not be suitable for single Li-Polymer cell operation. Is this correct? Need to confirm that this is not a requirement for as long as the...
    on Jul 18, 2011

  • Wiki Page: TPS650243 LDO Max Output Voltage

    Daniel Acevedo
    Q: TPS650243 LDO Max Output Voltage by 556517 Hello, For a lot of our PMUs (TPS650243, TPS65708 as two examples), the internal LDO has a recommended max Vout of 3.3V. 1) Is this a limitaiton of the LDO or purely a recommendation since most of the time with 5Vin, the highest output voltage that...
    on Jul 19, 2011

  • Wiki Page: TPS65835 Support

    Daniel Acevedo
    For TPS65835 applications support, please visit the E2E PMU Forums at: http://e2e.ti.com/support/power_management/pmu/default.aspx
    on Jul 28, 2011

  • Wiki Page: TPS65735 Support

    Daniel Acevedo
    For TPS65735 applications support, please visit the E2E PMU Forums at: http://e2e.ti.com/support/power_management/pmu/default.aspx
    on Jul 29, 2011

  • Wiki Page: TPS65023 and TPS65050 LDO's PSRR

    Daniel Acevedo
    Q: TPS65023 LDO's PSRR by 1788322 Hi, I'm looking for the PSRR specifications of the TPS65023 LDOs. This is not mentioned anywhere in the datasheet. Where can I find this data? A: Re: TPS65023 LDO's PSRR by 1129650 The PSRR data for the TPS65023 and the TPS65050 LDOs...
    on Aug 18, 2011

  • Wiki Page: TPS65053 unused ldo

    Daniel Acevedo
    Q: TPS65053 unused ldo by 8157 Customer is using the TPS65053, but doesnt need LDO2 and 3. I sent them the following reply. Please verify that it is correct. I based it off of a previous post, and assumed that the TPS65053 and TPS65023 would have the same requirements. .... You can get rid of...
    on Sep 19, 2011

  • Forum Post: TPS65950 VAUX LDOs - Voltage setting vs "Typical" Voltage

    Alex Dunfield69153
    Regarding the TPS65950: Q1) In the Technical Reference Manual on Page 334 (rev g) the VAUX2_DEDICATED register allows you to select the output voltage. Some of the output voltage options have a "Typical" number beside them (Ex. 0110 2.00 1.85 typical ) P.51 of the Rev E Data Manual...
    on Sep 29, 2011

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