Part Number: LP2985-N We are confirming that ESR of output capacitor is in stable region described in Figure 22.
We assume that frequency value of ESR is 1MHz by referring to 8.2.1 Design Requirements Table 1 Input Voltage. Is this frequency condition…
Part Number: LP2985-N Hi guys. Now I started soldering the circuit with LP2985AIM5-2.5 / NOPB. But I saw the key and markings on the back. I think the key should identify the first pin of the microcircuit. But here he seems to designate the first contact…
Part Number: LP2985-N Hi Team,
Here is a question from customer.
Customer use LP2985-3.3V as Vref for high accurate ADC and they find Vout changes with temp and different part changes at different amplitude. So customer hope to get help on below:
1. Vout…
Part Number: LP2985-N Hi to all,
I built a circuit to power a 3.3v power source using both battery and/or
USB cable.
The battery section of my circuit seems to work fine.
the USB section is using a LP2985-33 and I cannot get 3.3v at the output.
instead…
Hi Leo,
While I do not believe this will impact your application, please keep in mind that LP2985-N and LP2985 are different products. LP2985-N was released by National Semiconductor before the acquisition. LP2985 was released by TI to compete with…
Part Number: LP2985-N Hi,
In datasheet, 1.6V is the minimum to enable and 0.15V is the maximum to disable. Questions:
What is the accuracy for this threshold value?
What happen to Vout if Ven falls in between 0.15V and 1.6V?
Can I have the Ven vs Vout…
Part Number: LP2985-N Other Parts Discussed in Thread: ADS1299 , LP2985 Hello,
I have designed and manufactured the following circuit:
easyeda.com/editor
There I use a LP2985 LDO to power my ADS1299 with 3.3V, the input voltage of the LDS is 5V. However…
Part Number: LP2985-N We are trying to use the 3.3 V LDO regulator to step down a 9 V battery. It is working correctly and it says on the data sheet that it can handle voltages up to 16 V, but I am concerned about it being able to handle the power dissipation…
Part Number: LP2985-N I am using an LP2985IM5-5.0 with the recommended circuit from the data sheet. I have 10V input, 5V out, about 10mA load. I have seen 2 failures where the output voltage is about 6.5V on both failures. There is no oscillation on the…
Hello Matt,
From your description of actual visible damage to the package (i.e. a small crater) this sounds like the parasitic SCR from Vin to GND has been activated by reverse voltage.
See section "8.2.2.4 Reverse Input-Output Voltage" in the LP2985-N…
