Overview
The LD39100PUR from STMicroelectronics is a highly versatile and efficient low-dropout linear voltage regulator. This device is designed to provide up to 1 A of output current with an input voltage range of 1.5 V to 5.5 V. It is available in both fixed and adjustable output voltage versions, making it suitable for a wide range of applications. The LD39100PUR is notable for its ultra-low dropout voltage of 200 mV at 1 A load, very low quiescent current, and low noise characteristics, which make it ideal for low power battery-powered devices. The regulator also features internal protection mechanisms such as short-circuit current limiting and thermal protection, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.5 to 5.5 | V |
| Output Voltage Range | 0.8 to 4.5 | V (adjustable) |
| Dropout Voltage (typ.) | 200 | mV at 1 A load |
| Output Current (max.) | 1 | A |
| Quiescent Current (typ.) | 20 | µA at no load |
| Output Noise Voltage (typ.) | 30 | µVRMS at VOUT = 0.8 V |
| Output Voltage Tolerance | ±2% | @ 25 °C |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | DFN6 (3x3 mm) | |
| Mounting Method | Surface Mount |
Key Features
- Ultra-low dropout voltage of 200 mV at 1 A load
- Very low quiescent current: 20 µA typ. at no load, 200 µA typ. at 1 A load, and 1 µA max. in off mode
- Very low noise with no bypass capacitor: 30 µVRMS at VOUT = 0.8 V
- Output voltage tolerance: ±2% at 25 °C
- 1 A guaranteed output current
- Wide range of output voltages available on request: 0.8 V to 4.5 V with 100 mV step and adjustable from 0.8 V
- Logic-controlled electronic shutdown
- Stable with ceramic capacitors COUT = 1 µF
- Internal current and thermal limit
- AEC-Q100 qualified version available
Applications
The LD39100PUR is suitable for various applications requiring low power consumption and high reliability, including:
- Printers
- Game consoles
- Computers
- Consumer electronics
- Automotive post-regulation systems
- Low power battery-powered devices
Q & A
- What is the input voltage range of the LD39100PUR?
The input voltage range is from 1.5 V to 5.5 V.
- What is the maximum output current of the LD39100PUR?
The maximum output current is 1 A.
- What is the typical dropout voltage of the LD39100PUR at 1 A load?
The typical dropout voltage is 200 mV at 1 A load.
- What is the quiescent current of the LD39100PUR at no load?
The quiescent current is 20 µA typ. at no load.
- Is the LD39100PUR stable with ceramic capacitors?
- Does the LD39100PUR have internal protection mechanisms?
- What is the operating temperature range of the LD39100PUR?
- Is the LD39100PUR AEC-Q100 qualified?
- What is the package type of the LD39100PUR?
- What are some common applications of the LD39100PUR?
