Power Management
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Power Management

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Related Posts

  • Forum Post: TPS75801 - Help with selecting external heat sink for TO-220 package

    Leslie Chataway
    Question/Problem: Help with selecting external heat sink for TO-220 package Answer: Please refer to LDO thermal app note - SLVA118
    on Aug 18, 2008

  • Forum Post: TPS73601 - Question about 400MHz ripple

    Leslie Chataway
    Question/Problem: Question about 400 MHz ripple Answer: An LDO can not filter 400MHz frequencies because these frequencies are higher than the LDO's loop bandwidth. The customer must provide an external filter to properly filter 400MHz
    on Aug 18, 2008

  • Forum Post: TPS73XXX - Which LDO's have foldback current limit?

    Leslie Chataway
    Question/Problem: Which LDO's have foldback current limit? Answer: All TPS73XXX and the REG's
    on Aug 18, 2008

  • Forum Post: LDO - Requesting Dropout data for different currents

    Leslie Chataway
    Question/Problem: Requesting Dropout data for different currents Answer: Pointed customer to Portable Power Seminar Paper and app note covering LDO dropout ( SLVA207 )
    on Aug 21, 2008

  • Forum Post: LDO - Is there a list of LDOs sorted by package?

    Leslie Chataway
    Question/Problem: Is there a list of LDOs sorted by package? Answer: The online parametric search can provide this info. The Power Management Selection Guide also has this information
    on Aug 21, 2008

  • Forum Post: LDO - Can you explain how LDO devices maintain accuracy?

    Leslie Chataway
    Question/Problem: Can you explain how LDO devices maintain accuracy? Answer: Application notes SLVA072 and SLVA079 will provide this information
    on Aug 21, 2008

  • Forum Post: LDO - Can you provide information on current sharing between LDOs?

    Leslie Chataway
    Question/Problem:\ Can you provide information on current sharing between LDOs? Answer: Application note SLVA250 will have that information
    on Aug 21, 2008

  • Forum Post: LDO - Recommend replacement LDOs for 3.3V to 1.9V @ 1.9A, 3.3V to 1.1V +/-1.5% @ 1A and 1.8V to 0.9V @ 700mA for DD2

    Leslie Chataway
    Question/Problem: Recommend replacement LDOs for 3.3V to 1.9V @ 1.9A, 3.3V to 1.1V +/-1.5% @ 1A and 1.8V to 0.9V @ 700mA for DD2 Answer: TPS75801, TPS74301 and TPS51100 are the only choices due to power dissipation, tight tolerance and DDR requirements. But, need addt'l rails for TPS74301 and...
    on Aug 21, 2008

  • Forum Post: LDO - Options for 1.20V @ 5.7A for FPGA transceiver?

    Leslie Chataway
    Question/Problem: Options for 1.20V @ 5.7A for FPGA transceiver? Answer: Paralleling two LDOs see SLVA250; LDO controllers are combersome but doable; also see xapp946 on xilinx website for guidance on using switchers to power transceivers
    on Aug 21, 2008

  • Forum Post: TPS79633 response time

    Dennis Chau
    Hi, I am using TPS79633 as a voltage regulator for my design. Let's say the circuit is operating at a condition where load current is 1A. Now operating condition is changed and the circuit requires a load current 1.2A. I assume it take a finite amount of time (t1) for the regulator to adjust the...
    on Mar 12, 2010

  • Forum Post: TPS72515

    Jessie Dee
    I'm using a TPS72515 to drop voltage from PCI 3.3V down to 1.5V @ ~500mA. We have built thousand of these boards, but are seeing some of them back from the field with the TPS72515 only delivering 1.2V ! Could you help me to track down this issue ? Thanks for your time.
    on Apr 22, 2010

  • Forum Post: REG104-A Current limit

    Timothy Friend
    I am using the REG104-A to power a small incandescent lamp (2.9V @ 700mA). Because a cold lamp filament presents a very low resistance, the current surge as the lamp turns on can be rather high. The REG104 will current limit this to1.7A (typical), which is actually desirable, but I noticed that as the...
    on May 18, 2010

  • Forum Post: Question: About the output characteristic of LP2985-33.

    Toshiya Hiramatsu
    Hi, I have three questions about LP2985-33. 1.Does LP2985-33 have the fold-back type drooping characteristics? 2.What is value of test condition(Vo) in Figure 5? 　Vo=0V or 3.3V? 3.The value of the short circuit current of Figure 5 and Figure 6 seems to be different. What is different of Figure...
    on Jun 15, 2010

  • Forum Post: Re: TPS78227 - vibration motor direct drive

    Bill Stokes
    Hello Argail, I am not familiar with the operating environment for this motor. Several of TI's parts might serve well in this application depending on the severity of the environment: the TPS71727 might serve as alternative. The higher the PSRR, for instance the better the LDO can respond to load...
    on Jun 21, 2010

  • Forum Post: LDO with Reverse leakage protection

    Itzik Mizrachi
    Do we have LDO: Input voltage up to around 9V, 5V output with "Reverse Bias Protection" like OnSemi NCP3335A or Micrel MIC5219 ? Our part is up to 5.5V
    on Aug 19, 2010

  • Forum Post: TPS79933 LDO configuration question

    paul miller44746
    I am using a TPS79933 for a project. on the data sheet it appears that this should have a fixed output voltage of 3.3V. I have a couple of questions, Is this the case that it is actually a fixed output voltage? Is there a special configureation I need to apply to it to achieve this? What are...
    on Sep 2, 2010

  • Forum Post: PCB Thermal Calculator

    John Cummings
    Here is a link to a web based thermal calculator to help better approximate thermal issues in your design: http://www.ti.com/pcbthermalcalc
    on Sep 8, 2010

  • Forum Post: REG103-A Error Flag pin tolerance

    Michael W
    I am curious about the REG103UA-A and its ERROR Flag pin. The datasheet states that it falls low when the expected output voltage is "approximately" 10% (above or below) out of tolerance. However, the datasheet does not state any electrical specifications on this tolerance, given input voltage...
    on Oct 7, 2010

  • Forum Post: Re: Minimum input voltage for TPS79133

    Michael Day
    The reference to Vout+1V is defines the production test conditions. Testing LDOs with Vin=Vout+1V is an industry wide practice. The LDO will function properly with lower input voltage.
    on Oct 20, 2010

  • Forum Post: Re: Can I use TPS51116 V5IN in voltage divide resistor input?

    Peter Miller13277
    Harry, I would not recommend this. The TPS51116 controller uses the V5IN input for 2 functions: 1) Power the internal IC functions. This can draw upto 2mA of current 2) Provide 5V power for the IC MOSFETs. This will draw approximately 400kHz * ( Qg(hs) + Qg(ls) ) where Qg(hs) is the total...
    on Oct 27, 2010

  • Forum Post: TPS766xx and Cout ESR

    Mauro Vignali
    The TPS766xx as well the TPS76050 or TPS75233 data sheet includes some rules concerning output capacitance and ESR. Would you please suggest me some Capacitance manufacturer and suitable P/N used as reference in our EVM? Thanks Regards Mauro
    on Nov 18, 2010

  • 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: Current draw problem with TPS40200

    Peter Miller13277
    Kimberly, What you're seeing here is the TPS40200's current limit response. When the TPS40200 controller detects a current limit event, the converter is disabled, the soft-start capacitor is discharged slowly to 150mV, then the converter is enabled and the soft-start capacitor is charged...
    on Jan 7, 2011

  • Forum Post: Re: TPS73001 SPICE model

    Michael Day
    We are in the process of discussing which LDOs will need models and when these can be completed. For TI products that have models, the models will be available in the products' tool folder. We are not able to provide a timeline on getting additional models completed. What parameters are you looking...
    on Jan 12, 2011

  • Forum Post: TPS73HD301 RESET function issue.

    Hughie Lu64602
    Hi Sir, I have several issues about TPS73HD301 by our customer. They use this part as voltage regulator and supervisor for TMS320VC5501. But they found the RESET function sustained active when system power on. 1. The output voltage of adjustable regulator is 1.26V, but in terms of the description...
    on Jan 13, 2011
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