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  Javier Palomo

  • over 3 years ago
  • Power management
  • Power management forum

  LM2731: Heating/Failing Issues on Start-Up

  Part Number: LM2731 Hello Team, I am working with a customer who is using the LM2731 in their circuit to boost 5Vin to 12Vout. They noticed that they would every now and then have heating issues on their output capacitor, and also have catastrophic...
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  Andy Mitham

  • over 6 years ago
  • Power management
  • Power management forum

  LM2731 not switching

  • Resolved

  Hi, Has anyone had any experience of problems with the LM2731 ? I've used two in a new board
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  Ryuji

  • over 8 years ago
  • Power management
  • Power management forum

  RE: Questions of LM2731 : Discontinuous operation, Duty Cycle, In/Out Voltage difference

  Hello Jimmy , Thank you for your prompt reply! I would like to know more demerit of DCM (difference between CCM and DCM) if there are. For example, low efficiency , oscillation etc... If demerit is large peak inductor current only, It is...
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  Ryuji

  • over 6 years ago
  • Power management
  • Power management forum

  thetaJC(Janction to Case) of LM2731

  • Resolved

  Hello, Could you please kindly let me know about LM2731 ? (1) Please let me know theta JC of LM2731
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  Perry Tsao96839

  • over 5 years ago
  • Power management
  • Power management forum

  RE: LM27313 oscillating output

  Hi Uri, I think that you are running into the minimum on-time limitation of the LM27313. When the input voltage becomes very close to the output voltage, a boost converter needs to switch on for a very short amount of time to maintain the output voltage...
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  Anston Lobo

  • over 5 years ago
  • Power management
  • Power management forum

  RE: 5V to 19V, 1 amp output boost regulator selection

  Hi Matoi, LM2731, LM2735, LM2733, LM2735-Q1, LMR62014, LMR62421, LMR64010 none of these will work since they all top out at 2A switch current. Remember for a boost SW current is not Load current. You are targeting a device with 5A SW current for...
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  Alan Martin

  • over 4 years ago
  • Power management
  • Power management forum

  RE: LM2585-12 Voltage vs Current

  Hello Ilyas, For your second question. Look at LM2735; a SOT23-5 device with a 2A / ~20V switch. (There are also other package choices.) I think if you put a capacitor voltage doubler on the switch node, you can get there. Most of our offerings will...
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  Anston Lobo

  • over 7 years ago
  • Power management
  • Power management forum

  RE: Low noise Inverting Buck-Boost for light to medium loads?

  Hello again Marc, Because this is an inverting topology (+ve in and -ve out) and also a buck boost (|Vin|< or > |Vout|) then the best topology for low output ripple is a Cuk. Our library of available Cuk converters is quite small but many conventional...
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  Ignacio Bevacqua101791

  • over 8 years ago
  • Power management
  • Power management forum

  Re: SM72445

  Thank you, ill take that into account. Now i need a step up because i had a 5V supply, i'll solve it using a LM2731.
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  Giuseppe Pinto

  • over 8 years ago
  • Power management
  • Power management forum

  Re: LM27313 will not start/switch

  Hello Andreas, it may be a layout issue, could you provide your layout? You can also try to mount the LM27313 on a LM2731/3 EVAL BOARD since they are pin to pin compatible. Regards, Giuseppe

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