Part Number: DP83TG720S-Q1 Other Parts Discussed in Thread: LM3880 , TPS22993 Hi Team,
Can you suggest a power management module that would allow the user to enter/exit the sleep mode feature of the phy ethernet DP83TG720S-Q1?
Can you confirm the…
Part Number: LM3881 Other Parts Discussed in Thread: LM3880 Hi Support Team,
My customer is thinking about the pullup resistors of FLAG1, FLAG2 and FLAG3. The datasheet says that the resistors of 100 kOhm are recommended. They would like to reduce…
Part Number: LM2678 Other Parts Discussed in Thread: LM3880 , Hi,
I use the LM3880 of power sequencer and LM2678 of DCDC.
Please see attached my schematic.
I have a problem.
The ON/OFF voltage of LM2678 becomes approximately 4V.
My expectation…
Other Parts Discussed in Thread: LM3880 , LM3881 The output will be high impedances. Figure 10 for the LM3880 datasheet and Figure 6 on the LM3881 datasheet shows FLAG following VCC.
For more LM388x FAQ click or type the tag in the search bar [FAQ…
Part Number: 66AK2G12 Other Parts Discussed in Thread: LM3880 , Hi TI
Our Module use DSP 66AK2G12ABYA60, the module is mounted on MainBoard, the system block is below, system provide 5V to module, and then converted to 3.3V, 1.8V and 0.9V for module…
Hello
The figure 15 is just a demonstration to use the resistor divider to sequence on the power supply. it is not recommend to use this approach if application requires power down sequencing.
Please check the figure 19 of the LM3880 data sheet https…
Hello
LM3880/1 are the two products which support sequencing only. the rest UCD90xxx product do sequencing, margining, monitoring.
I would recommend UCD9090A to meet your need.
But LM3880 also works. you can cascade 3xLM3880 to achieve the 9 rail…
EN pin has a glitch free operation. The first timer will start counting at a rising threshold of EN, but will always reset if the EN pin is de-asserted before the first output FLAG is released. Please refer section 7.3.1 of https://www.ti.com/lit/ds/symlink…
Part Number: LM3881 Other Parts Discussed in Thread: LM3880 , Hello,
for the LM3880, the datasheet says an enable signal is needed for both a power up and power down sequence. Is that the same for LM3881 or will the resistor divider enable both? …
Hi JH Shin ,
Yes, it should be fine to use the V5V to power a LM3880MF supervisor as the LM3880 should only pull about a mA or so.
Please note that the V5V LDO will be disabled if the LMZ31520 INH pin is pulled low.
Regards, Kris
