Product overview
Description
The LD2981 is a 100 mA fixed-output voltage regulator. The low-drop voltage and the ultra low quiescent current make them suitable for low noise, low power applications and in battery powered systems.
The quiescent current in sleep mode is less than 1 μA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin n° 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD2981 is designed to work with low ESR ceramic capacitor. Typical applications are in cellular phone, palmtop/laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.
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All features
- Ultra low dropout voltage (0.17 V typ. at 100 mA load, 7 mV typ. at 1 mA load)
- Very low quiescent current (80 μA typ. at no load in on mode; max 1 μA in off mode)
- Guaranteed output current up to 100 mA
- Logic-controlled electronic shutdown
- Output voltage of 2.5; 3.0; 3.3; 5.0 V
- Internal current and thermal limit
- ± 0.75% tolerance output voltage available (A version)
- Output low noise voltage 160 μVRMS
- Temperature range: -40 to 125 °C
- Small package SOT23-5L and SOT-89
- Fast dynamic response to line and load changes
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STMicroelectronics - LD2981
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LD2981ABM30TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LD2981ABM33TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LD2981ABM50TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LD2981ABU33TR | Active | SOT-89 | Industrial | Ecopack2 | |
| LD2981ABU50TR | Active | SOT-89 | Industrial | Ecopack2 | |
| LD2981CM30TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LD2981CM33TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LD2981CM50TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LD2981CU33TR | Active | SOT-89 | Industrial | Ecopack2 | |
| LD2981CU50TR | Active | SOT-89 | Industrial | Ecopack2 |
LD2981ABU33TR
Package:
SOT-89Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Grade | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | ||
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| LD2981ABU50TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981CM33TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981ABM50TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981CM30TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981ABU33TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981ABM30TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981ABM33TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981CU50TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981CM50TR | | | distributors No availability of distributors reported, please contact our sales office |
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| LD2981CU33TR | | | distributors No availability of distributors reported, please contact our sales office |
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LD2981ABU50TR Active
LD2981CM33TR Active
LD2981ABM50TR Active
LD2981CM30TR Active
LD2981ABU33TR Active
LD2981ABM30TR Active
LD2981ABM33TR Active
LD2981CU50TR Active
LD2981CM50TR Active
LD2981CU33TR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors