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  • LM2991S Driving the GND Pin to adjust the voltage

    Other Parts Discussed in Thread: LM317 , LM337 Hi, I'm creating a Bipolar supply to drive an ECL Phase Frequency Detector. The Positive Supply (LM317) provides +1.3V (From a +5V supply). The Negative Supply (LM2991S) provides -3.7V (from a -5V supply)(the…

  • LM2991 Driving large ceramic capacitance

    Other Parts Discussed in Thread: LM2991 I need to drive a distributed ceramic capacitive load of ~80uF, 144 capacitors across a 1 sqft multi-layer PCB. Can I have a tantalum close to the LM2991 for stability, then add a series resistor before I drive the…
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  • LM2991 ADJ pin input range

    Resolved
    Other Parts Discussed in Thread: LM2991 Hi,All How much is range of input voltage about LM2991? I checked LM2991 datasheet,but nothing about it. I think that input voltage range is -3V to 24V,correct? Best Regards.
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  • RE: TPS629206: TPS629206

    Resolved
    Hi Shritesh, If you want -5Vout from -15Vin, TI does not offer a dedicated negative input/negative output buck converter. You could not use TPS629206. We do offer a negative LDO that you can consider- the LM2991. Hope this helps, Thanks, Nancy
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  • 2pin_ON/OFF input volatage range of LM2991

    Resolved
    Other Parts Discussed in Thread: LM2991 Hi,All It is written that Vout:ON is 0.8 to 1.2[V] and Vout:OFF:1.3 to 2.4[V] about ON/OFF input voltage on LM2991 datasheet. If I input under 0.8[V] and over 2.4[V] to ON/OFF input voltage,what happens? Please teach…
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  • LM2991 Output Current

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    Other Parts Discussed in Thread: LM2991 Hi All I want to know what is the maximum output current of LM2991 LDO. As mentioned in features section in datasheet it says that its output current is 1A max. Where as the characteristics section says that its…
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  • lm2991 Thermal Pad Connection

    Other Parts Discussed in Thread: LM2991 Hi All I am using LM2991 in one of my design. I have a question about thermal pad connection of that LDO. Generally we connect thermal pas with ground. But in datasheet in a figure it shows that thermal pas is input…
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  • Negative input negative output DC/DC buck converter

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    Other Parts Discussed in Thread: LM5001 , LM2991 , TPS40210 I am looking for help in designing a negative input to negative output DC/DC, low noise high efficiency buck converter. The input voltage range is -6V to -15V (nom 7.5V) and output voltage of -2…
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  • LM2941S and LM2991S Lead Finish Question TO-263

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    What is the surface finish of the leads on the LM2941S and LM2991S which is the TO-263 package? Thanks, Jay Conway
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  • Negative input negative output with buck converter

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    Other Parts Discussed in Thread: LM2991 , LM5001 Hello, I have a requirement as below, Input : -15V Output : -5V / 500mA Eff: >90% Request to advice ti parts to realise this solution with proven circuit and application note. Rgds.
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