Overview
The LD2985BM25R is a 150 mA fixed output voltage regulator produced by STMicroelectronics. It is characterized by its ultra-low dropout voltage and low quiescent current, making it highly suitable for low noise, low power applications, and battery-powered systems. The regulator features a logic-controlled electronic shutdown 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) | 2.5 | 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 | Ecopack2 | |
| 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 LD2985BM25R is typically used in applications such as cellular phones, palmtop laptop computers, personal digital assistants (PDAs), personal stereos, camcorders, and cameras. Its low noise and low power consumption make it ideal for battery-powered systems and other low-power electronic devices.
Q & A
- What is the output voltage of the LD2985BM25R?
The output voltage of the LD2985BM25R is 2.5 V. - What is the maximum output current of the LD2985BM25R?
The maximum output current is 150 mA. - What is the dropout voltage of the LD2985BM25R at 150 mA load?
The dropout voltage is 280 mV at 150 mA load. - What is the quiescent current of the LD2985BM25R at no load?
The quiescent current is 80 µA at no load. - What is the operating temperature range of the LD2985BM25R?
The operating temperature range is -40°C to 125°C. - What package type is the LD2985BM25R available in?
The LD2985BM25R is available in a SOT23-5L package. - How does the LD2985BM25R reduce noise?
An external capacitor (CBYP = 10 nF) connected between the bypass pin and GND reduces the noise to 30 µVrms. - What is the RoHS compliance grade of the LD2985BM25R?
The RoHS compliance grade is Ecopack2. - Can the LD2985BM25R be used in battery-powered systems?
Yes, it is particularly suitable for battery-powered systems due to its low dropout voltage and low quiescent current. - What is the inhibit function of the LD2985BM25R?
The inhibit function allows the device to be shut down via a logic control on pin 3 (TTL compatible), reducing power consumption.
