Answered

• LM43603-Q1: Could you tell me the difference between LM43603-Q1 and LM43603A-Q1

  

  K.Yaita

  Resolved

  Part Number: LM43603-Q1 Other Parts Discussed in Thread: LM43603 Hi Team, The datasheet shows the following. --------------------------------------------- LM43603A-Q1 version is optimized for PFM operation and recommended for new design. The device is pinto…

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  • 14 days ago
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Answered

• LM43603: About Bootstrap capacitor selection

  

  Kaji@PAN

  Resolved

  Part Number: LM43603 Hi, I am considering using the LM43603 device. I would like to ask you about Bootstrap capacitors. The data sheet states that a capacitor with a withstand voltage of 6.3V or higher and a capacity of 0.47uF should be used. In EVM, 25V…

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  • 2 months ago
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• LM43603-Q1: LM43603-Q1: What is the max tolerance of switching frequency?

  

  SY Yoon

  TI Thinks Resolved

  Part Number: LM43603-Q1 Hi, LM43603-Q1 is designed with input voltage range is from 9V to 36V and output is 5V in my customer's board. RT pin of LM43603-Q1 is connected with a resistor to make 990KHz switching frequency. The resistor value is 40.2Kohm…

  • 4 months ago
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• LM43603: Phasemargin and Webbench

  

  nphansen

  TI Thinks Resolved

  Part Number: LM43603 I'm having problems with a design using the LM43603. I'm using several of them with different output voltage. But for this case I will just mention specs: Vout 3.3V, 1.0 A. Vin 10-33V I'm using the recommended approach in the…

  • 2 months ago
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Answered

• LM43603-Q1: -12V NEGATIVE VOLTAGE GENERATION PROBLEM

  

  RAVI CHAWDA

  Resolved

  Part Number: LM43603-Q1 PFA the Schematics Input Voltage => +12V Desired Output Voltage => -12V Current Voltage observed => -8.99V Output Current will be less than 0.5 amps What changes will be required to achieve -12V. Most the values have been…

  • Resolved

  • 4 months ago
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• LM43603: IC do not restart by itself

  

  TISL

  TI Thinks Resolved

  Part Number: LM43603 Dear e2e support, My customer is facing an issue on multiple boards, for a 12V --> 5V@1A application After 3 to 4 days in continuous test, the DC/DC doesn't restart The VCC gives a 2.4V only. If an external 3.3V is applied…

  • 4 months ago
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• LM43603: Output abnormal issue due to touch with sensitive pin

  

  Tess Chen

  TI Thinks Resolved

  Part Number: LM43603 Hi Team: Issue: the circuit could run as normal, but once hand touch with some sensitive area on the board, the outout disapear and sometime could revovery when moving the connection and occationally this cause short between the output…

  • 4 months ago
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Answered

• LM43603: Cff calculation

  

  Andrejs Gasilovs

  Resolved

  Part Number: LM43603 Hi everyone, I'm following the datasheet and trying to calcualte Cff value for LM43603. I'm following section 8 as a design exmaple. Crossover frequency, fx, calculated using equation 21 and given Vout = 3.3V and Cout = 150uF…

  • Resolved

  • 7 months ago
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• LM43603: Strange ringing on switch node 12V in 3.3V out load 0.1A

  

  Relay Man 2

  TI Thinks Resolved

  Part Number: LM43603 Hi, I am using an LM43603 to go 12V to 3.3V at light loads, I can see the bottom FET is turning off for part of the cycle, when it turns off there switch node then rings for a number of cycles, peak voltage is a significant percentage…

  • 6 months ago
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• LM43603-Q1: PGOOD issue on large capacitor LOAD

  

  Thierry HAUSER

  TI Thinks Resolved

  Part Number: LM43603-Q1 Other Parts Discussed in Thread: LM43603 Hello, We use LM43603 as buck +24V => +13V with a very large capacitor loads (4700µF//4700µF). PGOOD is left floating . I would like to know if PGOOD pin enable Hiccup protection…

  • over 1 year ago
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