Overview
The LD2985BM33R is a 150 mA fixed output voltage regulator produced by STMicroelectronics. This component is characterized by its ultra-low dropout voltage and low quiescent current, making it particularly suitable for low noise, low power applications, and battery-powered systems. The regulator features a logic-controlled electronic shutdown function and an internal current and thermal limit, ensuring reliable operation. It is available in a small SOT23-5L package and operates over a temperature range of -40 °C to 125 °C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (nom) | 3.3 | V |
| Output Current (nom) | 0.15 | A |
| Dropout Voltage | 280 mV at 150 mA, 7 mV at 1 mA | mV |
| Quiescent Current | 2 mA typ. at 150 mA load, 80 µA at no load | mA/µA |
| Operating Temperature Range | -40 to 125 | °C |
| Package | SOT23-5L | |
| RoHS Compliance Grade | Ecopack3 | |
| Output Noise Voltage | 30 µVrms | µVrms |
Key Features
- Very low dropout voltage (280 mV at 150 mA and 7 mV at 1 mA load)
- Very low quiescent current (2 mA typ. at 150 mA load and 80 µA at no load)
- Output current up to 150 mA
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Low output noise voltage (30 µVrms)
- Small package (SOT23-5L)
- Temperature range: -40 °C to 125 °C
Applications
The LD2985BM33R is typically used in various low power and low noise applications, including cellular phones, palmtop laptops, personal digital assistants (PDAs), personal stereos, camcorders, and cameras.
Q & A
- What is the output voltage of the LD2985BM33R?
The output voltage of the LD2985BM33R is 3.3 V. - What is the maximum output current of the LD2985BM33R?
The maximum output current is 150 mA. - What is the dropout voltage of the LD2985BM33R at 150 mA load?
The dropout voltage is 280 mV at 150 mA load. - How low is the quiescent current of the LD2985BM33R at no load?
The quiescent current is 80 µA at no load. - What is the operating temperature range of the LD2985BM33R?
The operating temperature range is -40 °C to 125 °C. - What package type is the LD2985BM33R available in?
The LD2985BM33R is available in a SOT23-5L package. - How does the LD2985BM33R reduce noise?
An external capacitor (CBYP = 10 nF) connected between the bypass pin and GND reduces the noise to 30 µVrms. - What is the purpose of the INHIBIT pin on the LD2985BM33R?
The INHIBIT pin allows for logic-controlled electronic shutdown, enabling the device to be put into a standby mode to reduce power consumption. - Is the LD2985BM33R RoHS compliant?
Yes, the LD2985BM33R is RoHS compliant with an Ecopack3 grade. - In which types of devices is the LD2985BM33R commonly used?
The LD2985BM33R is commonly used in cellular phones, palmtop laptops, PDAs, personal stereos, camcorders, and cameras.
