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…
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…
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…
Vijay, I have replaced the inductor with a 2.2uH value one, as TI recommends. In addition I have changed out the output capacitor to TI value recommended 22uF ceramic. Using active probes with short traces the waveform looks about the same, with a +/…
Hi Ushikubo-san,
This is my test result.
Max Load(mA) - No Thermal shutdown/Over current limit/Higher than 4.5V
25C
-40C
125C*
Output option
Input voltage(V)
load current(mA)
Output voltage(V)
Output voltage…
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…
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…
The evaluation board has 4 layers: TOP, GND, SGND and BOTTOM. LM3668 pin 3 goes to GND layer while LM3668 pin 9 and EP/DAP goes to SGND layer.
My PCB also has 4 layers: TOP, GND, PWR(3.3V) and BOTTOM. LM3668 pin 3 and 9 goes to GND layer. My question…
