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Part Number: LM3940 Attached is a picture of my current 4-layer PCB layout surrounding the LM3940. Via holes are 12mil. On the input line there is a 0.47uF MLCC. On the output line there is a 47uF (!6.3V) tantalum capacitor. Are the thermal relief connections…
Part Number: LM3940 Support Path: /Product/Help with Device Selection/ Dear sir ,
we are manufacturing automotive product
we would like to verify LM3940IMPX-3.3/NOPB layout .
please find attached layout and schematic document.
Regards,
Ravindra LM3940IMPX…
Part Number: LM3940 Does a Spice simulation model exist for this device (or any other simulation model)? If it doesn't exist, are there plans to generate one? If there is no plans to generate one, is there a generic template to create one?
Other Parts Discussed in Thread: LM3940 Hello, I am using LM3940 to get 3.3V from a 5.5V power input, the output current is quite small (a few hundred mA).
The LM3940 has a quite good heat sink by large copper area on the PCB.
I have used a 47uF ceramic…
Other Parts Discussed in Thread: LM3940 , TINA-TI Can anyone provide a pspice model they have used in their designs? TI support directed me here as there was not an available model in Spice Rack.
Thanks,
Mike
Other Parts Discussed in Thread: LM3940 Dear Sir
Please, answer, is it possible to feed 3.3V voltage at the output of the LM3940ISX-3.3, provided that input power supply is off?
TIA.
Sincerely,
Vladimir Naumenkov
www.agat.by
Other Parts Discussed in Thread: LM3940 Hi,
I want to get 3.3V from LM3940 regulator which can convert 5V to 3.3V. Around LM3940 I only soldered capacitors as datasheet suggested, but I get 4.8V or 4.2V as output. Do I also need to add some resistors to…
Hello Ning,
According to this thread, sometimes after reflow dis-coloring can happen, see here:
LM3940: Discoloration of component leads after reflow process (original: silver color - after reflow: yellowish color ) - remark: only this component has this…
Other Parts Discussed in Thread: LM3940 , LP3961 Hello, My name is Rachel Roberts and I am an electrical engineer intern. I am creating a project and I am trying to simulate the schematics I have created. To do so I need IBIS Models as my company uses HyperLynx…
Hi Sir,
I am using LM3940 voltage regulator.They mentioned 0.47uf input side of the regulator in the datasheet . When i verified to design a control card related to my application most of them using additionally 470uf /16v capacitor for filtering the…
