Answered

• LM43603-Q1: LM43603 external bias supply

  

  John Coughlan

  Resolved

  Part Number: LM43603-Q1 Using LM43603-Q1 as 15V to 9V converter. I have a external 5V supply available and using this for Bias rail per datasheet recommendation. The 5V rail can be present before /after the 15V. It mentions in the datasheet that Bias…

  • Resolved

  • 21 days ago
  • Power management
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• LM43603: switching frequency variation

  

  Makoto Oka

  TI Thinks Resolved

  Part Number: LM43603 Current circuits use an external RT resistor with a resistance value of 89k ohm (tolerance +/- 0.5%) to determine the switching frequency. The maximum switching frequency range is calculated from 401.8kHz to 495.99kHz using the maximum…

  • 6 months ago
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• LM43603: Bootstrap capacitor

  

  Shuhei Goto

  TI Thinks Resolved

  Part Number: LM43603 Hi team, It is recommended that 0.47uF for bootstrap capactior. Is it possible to use larger cap like 1uF for bootstrap? Best regards, Goto

  • 9 months ago
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• LM43603: Questions about LM43603 webench.

  

  Kazuya Nakai59

  TI Thinks Resolved

  Part Number: LM43603 Hello guys, One of my customers is considering using LM43603 for their next products. They are simulating LM43603 with Webench. At this moment, they have the following questions. Could you please give me your answer to the questions…

  • over 3 years ago
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Answered

• LM43603: Problem with initial voltage drop when the PGOOD signal is activated.

  

  Angel Trendafilov

  Resolved

  Part Number: LM43603 Tool/software: Hello, Before 2 years we developed a new device with LM43603. The design was done with WEBENCH Designer. Input voltage 12-28VDC, output voltage 5V, Iout - 3A max., Cout 180uF polymer organic capacitor, RT - 115kOhm…

  • Resolved

  • over 1 year ago
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• LM43603: Find inverting IC

  

  GARETH OU

  TI Thinks Resolved

  Part Number: LM43603 Hi Please help to suggest is and product 5V to -12V / 0.3A~0.5A can be used~ Pci slot use. Thank you!

  • over 3 years ago
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• LM43603: LM43603: Poor voltage regulation under load

  

  Thomas Galbraith

  TI Thinks Resolved

  Part Number: LM43603 I have made 2 PCBs with the same schematic shown but different layouts. One circuit works fine and the other has poor output voltage regulation. On the one that has poor regulation, under no-load it outputs the desired voltgae…

  • over 4 years ago
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Answered

• LM43603: PGOOD pin connection

  

  Shoo Saga

  Resolved

  Part Number: LM43603 Hi teams, My customer want to pull up PGOOD pin to VCC pin. Is that OK? Regarding to the datasheet, It doesn't allow VCC pin to connect any load. Thanks, Shoo

  • Resolved

  • over 3 years ago
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• LM43603: LM43603xxx as SMPS (Rise Time 't' for Soft Start?)

  

  Sneha Saxena

  TI Thinks Resolved

  Part Number: LM43603 Other Parts Discussed in Thread: LM61440-Q1 Just received word that there can be some inrush issues if there isn't some matter of "slow start" for the LM43603 converter. It takes some time 't' to rise for a soft/slow start, but there…

  • over 3 years ago
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• LM43603-Q1: Using LM43603-Q1 as an alternate to LM46002PWPT. We are having power supply start up issue

  

  Mike Ihm

  TI Thinks Resolved

  Part Number: LM43603-Q1 Other Parts Discussed in Thread: LM43603 , LM46002 We are having startup issue with using an LM43603 rather than a LM46002. Schematic below. When the supply has around 6V to 8V at the input the output ripple is around 400mV.…

  • over 4 years ago
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