Part Number: LM25007 Hi,
When the Ron resistor is set to the standard 200kΩ, the input/output ripple voltage is 350mV. When the Ron resistor was set to 50kΩ, the ripple voltage was reduced to about 50mV.
Q1. I checked the datasheet, but it doesn't…
Part Number: LM25007 Hi,
Our customer is demanding IMDS numbers for the parts used in their design.
Is this something that you support?
I have also another part that is used in the same product:
LM2936DTX-5.0
Is very greatful for your assistance…
Part Number: LM25007 Other Parts Discussed in Thread: LM5007 Hello,
I would like to know if LM5007 can be an alternate part for LM25007, being the pinout identical and since this latter seems to be unavailable from any distributor.
Please also advise…
Part Number: LM25007
After the LM25007 switching power supply, customer have a 3.3V LDO to generate the voltage for their microcontroller. These can be fed to an external power supply or just about the LM25007 switching power supply. If they externally…
Part Number: LM25007 Hello During some EMC test I found perturbation on my Power supply due to the DC/DC of my board. I use a LM25007.
Is there some specific recommandation using the LM25007 regarding this problem.
Hi Jose,
LM25007 is a non-synchronous buck converter. It works in DCM (discontinuous mode) at load current < 1/2*(inductor current ripple).
The 1mA limit is not for CC/DCM but for boot capacitor regulation.
Thanks and regards,
Other Parts Discussed in Thread: LM25007 Hi,
My name is Henry. I'm using LM25007 as power source to supply a heater(the heater is a 25 ohm resistor), input voltage of LM25007 is 24V, output voltage is 7.5V. there is a PWM signal to control a PNP transistor…
Hi
I think I found the issue.
After some additional tests, I noticed that the regulator will start if I apply a short voltage pulse to the Boot Cap. Then I found the document AN-2129 Boot Capacitor Regulation in LM25007 Constant-On-Time (COT) Converter…
Part Number: UCC28881EVM-680 Other Parts Discussed in Thread: LM25007 , UCC28881 , Hi,
I'm designing a power supply that should deliver 3.3V and 5V from 230VAC. The current rating is 300mA @ 3.3V and 100 mA @ 5V (Maximum values).
My biggest concern…
Anston,
Joe found this App Note that looks like the problem he was seeing:
SNVA475A–March 2011–Revised April 2013
AN-2129 Boot Capacitor Regulation in LM25007 Constant-On-Time (COT) Converter
Mark Pearson
