Part Number: LM5163-LM5164DESIGN-CALC Other Parts Discussed in Thread: LM5164 Hi team,
It's a customer issue that I use the quickstart tool to analysis the efficiency of LM5164 at Vin=12V, Vo=5V, Io=50mA .
Other parameters remain unchanged, change the…
Hello,
For your design, a minimum of 2.2uF of input capacitance is required. The output capacitance is also too low. Try using two, 22uF output capacitors and make sure they are properly rated for the output voltage to account for capacitor de-rating…
Hi Jayanthi,
The schematic looks ok. Can you confirm that the layout matches the layout guideline in section 10.2 of the DS? Is the feedback trace far away from the switching node?
Can you take a waveform of VOUT, VIN, SW (a few cycles), and FB in steady…
Part Number: LM5163 I'm struggling with the buck converter (42V -> 19V, 70mA). I've done a calculation in the WEBENCH tool and it gave me the suggested circuit below. It implise that at 300kHz switching frequency and 70mA load the circuit should run in…
Hello Olivier,
Normally the inductor will be calculated so that the ripple current is about 40% of the output load current (full load capability of the device).
If they want to minimize the inductor size, I would suggest using a bit higher switching frequency…
Hi Chirayu
Pls download LM5164 calculator for application circuit design:
https://www.ti.com/tool/LM5163-LM5164DESIGN-CALC
Pls use all capacitors connected on output rail for calculation.
Pls upload the actual circuit and layout of LM5164 section if no…
Hi Tcha,
LM5163 is good choice at the input variation up to 57V. You download the Calculator for LM5163 circuit design.
https://www.ti.com/tool/LM5163-LM5164DESIGN-CALC
B R
Andy
Hi Sebastian,
In general I think it is normal to have more output ripple at light load as the part will reduce the switching frequency to save power.
0.4V does seem high though.
We have a quick start calculator (excel based) that you can use to tune the…