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  • LM3668: Overcurrent condition

    Part Number: LM3668 Hi, Customer is investigating an issue related to LM3668, where it appears to stop working even though the PVIN and VDD are ok (3.8V) and Enable pin is high (2.5V). They suspect that the issue could be caused by a current limiting…
    • Answered

  • WEBENCH® Tools/LM3668: About WEBENCH

    Resolved
    Part Number: LM3668 Tool/software: WEBENCH® Design Tools Hello Team, When trying to open design with 3.3V output fixed type of LM3668, the following error will appear. It seems that it has not changed from 2.8V output fixed type. I tried to open the…
    • Resolved
    • Answered

  • LM3668: Need DC/DC converter for hand crank mobile phone charger

    Resolved
    Part Number: LM3668 Other Parts Discussed in Thread: TPS63070 Hello, I'm trying to create a hand crank mobile phone charger. I will be using a 12v DC geared motor. In order to charge a mobile phone, I need a 5v output at 1A. Since this is a hand crank…
    • Resolved
    • Answered

  • LM3668: Resistance between VIN and GND while unpowered

    Resolved
    Part Number: LM3668 I have a prototype device which uses a LM3668 buck-boost converter to regulate 5V down to 3.3V. Recently, the device failed and there is now an electrical short between the net tied to VIN pins (V_UNREG) and the net tied to the GND…
    • Resolved

  • LM3668: Unexpectedly high ripple voltage during high loads

    Part Number: LM3668 Support Path: /Product/Development and troubleshooting/ Under non-switching 600mA load we are seeing a ripple voltage of +/-500mV in buck/boost mode and boost mode. Under a non-switching 400mA load we are seeing a +/- 500mV ripple…
    • Answered

  • RE: LM3668 supported by Webench but with wrong paramenters

    Resolved
    Hi Shinji-san, This is a Buck-Boost device, please set the VinMax > Vout > VinMin, the LM3668 Q1 should be offered as one of the solutions in WEBENCH.
    • Answered

  • LM3668-Q1 Maximum Load current for Vin=3V to 3.3V

    Resolved
    Other Parts Discussed in Thread: LM3668 Hello, Customer wants to use LM3668-Q1 with following condition and needs to confirm if they can use LM3668-Q1 or not. Vin: 3.3V Load current: 660mA max Ta: 105C max First page of datasheet has following feature…
    • Resolved

  • Varying the Vout on the LM3668

    Other Parts Discussed in Thread: LM3668 Is there a way of margining the output of the LM3668-4550? I would like to vary +/-mVolts to +/- 10ths of a volt around 4.5V with Vin=3.3V+/-10%. This would not be for normal operation - just for verification in…

  • RE: LM3668 EVM is not giving 1 A with 2.5 to 5.5 V

    Hi Vengat, I happened to stumble on this query and it appears no one has offer any hint. Actually ,this is a fairly common issue, mostly due to power supply with inadequate power of current limitation. I have a 3 Amp supply and set it to full current, for…

  • Product Lifecycle

    Other Parts Discussed in Thread: MAX3232 , XTR111 , ISO7421 , TPS2051 , TPD4S012 , LM4040 Dear Sir / Madam, Please find below TI IC part number which is used in our project. MAX3232/SOIC-Thin XTR111(MSOP-10) CD74HC147M ISO1050DUBR ISO7421 TPS2051…

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