Skip to content
WhatSMDSign in

SMD marking

ODO

Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables.

Not sure which one you have?

Answer up to 4 quick questions and these 2 parts are ranked, with a meter test that settles it. It works on a dead part too.

The only part printed ODO in our tables

TLV70012DDC

What it is
LDO regulator
Maker
Texas Instruments
Package
Not recorded
Pins
5
Details
200-mA, Low-IQ, Low-Dropout Regulator for Portable Devices
Source
From the manufacturer's datasheet

Is it dead?

Voltage, board powered, black probe on ground. Then ohms with the power off.

Working, it reads

Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.

Dead, it reads

  • Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
  • Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
  • Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

Datasheetfor TLV70012DDC, opens in a new tab

Printed with a code easy to misread

This part is printed with a character that is easy to misread as what you typed. The odd one out is marked on each.

  • TPS71918-28DRVprinted ODQWSONLDO regulator, 6 pins, Texas Instruments

    Printed ODQ on the part. Easy to misread as ODO. Check that character with a loupe before you order anything.

    What it is
    LDO regulator
    Maker
    Texas Instruments
    Package
    WSON
    Pins
    6
    Details
    Dual, 200mA Output, Low Noise, High PSRR Low-Dropout Linear Regulators
    Source
    From the manufacturer's datasheet

    Is it dead?

    Voltage, board powered, black probe on ground. Then ohms with the power off.

    Working, it reads

    Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.

    Dead, it reads

    • Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
    • Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
    • Power off, input to output near 0 Ω: shorted.
    On the board:
    An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
    Compare:
    The same regulator on another rail or another board shows the right voltages and the right resistances.
    Watch for:
    Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.

    A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

    Datasheetfor TPS71918-28DRV, opens in a new tab
1 more part has a code that begins with ODO

Codes that begin with ODO

For a marking with its end worn or burnt off. Each one shows its full printed code.

  • TPS2000EDGKprinted 000EMSOP-8Load switch, 8 pins, Texas Instruments

    Printed 000E. Only the start matches what you typed, so this fits only if the rest of the marking is worn off.

    What it is
    Load switch
    Maker
    Texas Instruments
    Package
    MSOP-8
    Pins
    8
    Details
    Current-Limited, Power-Distribution Switches
    Source
    From the manufacturer's datasheet

    Is it dead?

    Voltage, board powered, black probe on ground.

    Working, it reads

    Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.

    Dead, it reads

    • Output at the input voltage while switched off: the pass element has shorted.
    • Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
    On the board:
    An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
    Compare:
    If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
    Watch for:
    The pinout and whether the enable is active high or low differ between parts. The datasheet gives both.

    A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

    Datasheetfor TPS2000EDGK, opens in a new tab

Open this in the search to correct a character or try another package.