Technical Specifications
Parameters and characteristics for this part
| Specification | LD2981CU33TR |
|---|---|
| Current - Output | 100 mA |
| Current - Quiescent (Iq) | 150 çA |
| Current - Supply (Max) [Max] | 2.6 mA |
| Mounting Type | Surface Mount |
| Number of Regulators | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | 1.81 mOhm |
| Package / Case | TO-243AA |
| Protection Features | Over Current, Over Temperature |
| Supplier Device Package | SOT-89-3 |
| Voltage - Input (Max) [Max] | 16 V |
| Voltage - Output (Min/Fixed) | 3.3 V |
| Voltage Dropout (Max) [Max] | 0.375 V |
LD2981 Series
Ultra low drop voltage regulators with inhibit low ESR output
| Part | Number of Regulators | Protection Features | Voltage Dropout (Max) [Max] | Current - Supply (Max) [Max] | Current - Quiescent (Iq) | Voltage - Input (Max) [Max] | Current - Output | Package / Case | Voltage - Output (Min/Fixed) | Supplier Device Package | Mounting Type | Output Type | Operating Temperature [Max] | Operating Temperature [Min] | Output Configuration | Control Features |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | TO-243AA | 3.3 V | SOT-89-3 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | |
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | SC-74A SOT-753 | 5 V | SOT-23-5 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | Enable |
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | SC-74A SOT-753 | 3.8 V | SOT-23-5 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | Enable |
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | TO-243AA | 5 V | SOT-89-3 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | |
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | SC-74A SOT-753 | 5 V | SOT-23-5 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | Enable |
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | TO-243AA | 1.8 V | SOT-89-3 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | |
STMicroelectronics | 1 | Over Current Over Temperature | 0.375 V | 2.6 mA | 150 çA | 16 V | 100 mA | SC-74A SOT-753 | 1.8 V | SOT-23-5 | Surface Mount | 1.81 mOhm | 125 °C | -40 °C | Positive | Enable |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 0.82 | |
| 10 | $ 0.72 | |||
| 25 | $ 0.68 | |||
| 100 | $ 0.55 | |||
| 250 | $ 0.51 | |||
| 500 | $ 0.44 | |||
| 1000 | $ 0.35 | |||
| Digi-Reel® | 1 | $ 0.82 | ||
| 10 | $ 0.72 | |||
| 25 | $ 0.68 | |||
| 100 | $ 0.55 | |||
| 250 | $ 0.51 | |||
| 500 | $ 0.44 | |||
| 1000 | $ 0.35 | |||
| Tape & Reel (TR) | 2500 | $ 0.32 | ||
| 5000 | $ 0.29 | |||
| 12500 | $ 0.28 | |||
| 25000 | $ 0.27 | |||
Description
General part information
LD2981 Series
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.
Documents
Technical documentation and resources