Overview
The Texas Instruments LP2985A-33DBVT is a highly efficient, low-dropout voltage regulator designed to provide stable and regulated power supplies. This component is part of the LP2985/LP2985A series, known for its wide-input, low-noise, and low-dropout characteristics. The LP2985A-33DBVT is specifically configured to deliver a fixed output voltage of 3.3V and can handle up to 150mA of load current. It is ideal for applications requiring precise voltage regulation in compact and power-sensitive designs.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LP2985A-33DBVT |
| Package | SOT-23-5 (DBV) |
| Input Voltage Range | 2.5V to 16V |
| Output Voltage | 3.3V (fixed) |
| Output Current | Up to 150mA |
| Output Accuracy | ±1% over load and temperature |
| Quiescent Current (IQ) | 71µA at ILOAD = 0mA, 750µA at ILOAD = 150mA |
| Shutdown Current | 1.12µA (typ) |
| Noise | 30µV RMS with 10-nF bypass capacitor |
| PSRR | 70dB at 1kHz, 40dB at 1MHz |
| Operating Junction Temperature | –40°C to +125°C |
| Thermal Protection | Thermal shutdown and current limit protection |
Key Features
- Wide Input Voltage Range: Supports input voltages from 2.5V to 16V.
- Fixed Output Voltage: Delivers a precise 3.3V output voltage.
- Low Dropout Voltage: Dropout voltage of 350mV at 150mA load.
- Low Noise and High PSRR: Low output noise of 30µV RMS and high PSRR of 70dB at 1kHz and 40dB at 1MHz.
- Low Quiescent Current: Quiescent current as low as 71µA at no load and 750µA at full load.
- Thermal and Current Protection: Features thermal shutdown and current limit protection for reliable operation.
- Compact Package: Available in a 5-pin SOT-23 (DBV) package, ideal for space-constrained designs.
Applications
The LP2985A-33DBVT is suitable for a variety of applications that require stable and regulated power supplies. These include:
- Portable Electronics: Ideal for battery-powered devices due to its low quiescent current and compact size.
- Instrumentation: Used in precision instruments that require stable voltage regulation.
- Automotive Systems: Suitable for automotive applications due to its wide operating temperature range and robust protection features.
- Sensors and Small Power Supplies: Its low noise and high PSRR make it suitable for sensor applications and small power supply designs).
- Motor Drives and Control Boards: Used in motor drives and control boards where stable voltage regulation is crucial).
Q & A
- What is the input voltage range of the LP2985A-33DBVT?
The input voltage range is from 2.5V to 16V.
- What is the fixed output voltage of the LP2985A-33DBVT?
The fixed output voltage is 3.3V.
- What is the maximum output current of the LP2985A-33DBVT?
The maximum output current is up to 150mA.
- What is the quiescent current of the LP2985A-33DBVT?
The quiescent current is 71µA at no load and 750µA at full load).
- Does the LP2985A-33DBVT have thermal protection?
Yes, it features thermal shutdown and current limit protection).
- What is the package type of the LP2985A-33DBVT?
The package type is 5-pin SOT-23 (DBV)).
- What is the operating junction temperature range of the LP2985A-33DBVT?
The operating junction temperature range is –40°C to +125°C).
- How does the LP2985A-33DBVT reduce noise?
It reduces noise by using a bypass capacitor, achieving low noise performance of 30µV RMS).
- What are some common applications of the LP2985A-33DBVT?
Common applications include portable electronics, instrumentation, automotive systems, sensors, and small power supplies).
- Does the LP2985A-33DBVT have high PSRR?
Yes, it has a high PSRR of 70dB at 1kHz and 40dB at 1MHz).
