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Showing 31 results View by: Thread Post Sort by
    Answered
  • LP2985-N: Output capacitor ESR frequency

    user6004480
    user6004480
    Resolved
    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…
    • Resolved
    • 2 months ago
    • Power management
    • Power management forum
  • Answered
  • LP2985-N: Where is the first contact ?!

    Maria Tali
    Maria Tali
    Resolved
    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…
    • Resolved
    • 6 months ago
    • Power management
    • Power management forum
  • LP2985-N: Vout vs temp and temp drift

    Given Ding
    Given Ding
    TI Thinks Resolved
    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…
    • over 1 year ago
    • Power management
    • Power management forum
  • LP2985-N: Battery and USB power circuit

    user6170139
    user6170139
    TI Thinks Resolved
    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…
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • RE: LP2985-N: LP2985 design guidelines & capacitor constraints

    Ryan Eslinger
    Ryan Eslinger
    Resolved
    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…
    • over 2 years ago
    • Power management
    • Power management forum
  • LP2985-N: Enable threshold

    Yee Yong Teo
    Yee Yong Teo
    TI Thinks Resolved
    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…
    • over 3 years ago
    • Power management
    • Power management forum
  • Answered
  • LP2985-N: Low voltage output for 3.3V regulator

    Felipe Neves80
    Felipe Neves80
    Resolved
    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…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
  • LP2985-N: Stepping down 9V battery to 3.3V

    Ashish Mistry
    Ashish Mistry
    TI Thinks Resolved
    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…
    • over 3 years ago
    • Power management
    • Power management forum
  • LP2985-N: Failure

    Alan Firpo
    Alan Firpo
    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…
    • over 3 years ago
    • Power management
    • Power management forum
  • RE: LP2985-N: Voltage regulator blowing

    Donald Jones
    Donald Jones
    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…
    • over 3 years ago
    • Power management
    • Power management forum
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