Overview
The LD39100PURY, produced by STMicroelectronics, is a 1 A low quiescent current, low noise voltage regulator. This device is designed to provide a maximum current of 1 A with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. It is particularly suited for low power battery-powered applications due to its ultra-low dropout voltage, low quiescent current, and low-noise characteristics. The regulator is stable with ceramic capacitors on the input and output and features logic-controlled electronic shutdown, short-circuit constant current limiting, and thermal protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.5 to 5.5 | V |
| Typical Dropout Voltage | 200 | mV |
| Maximum Output Current | 1 | A |
| Output Voltage Tolerance | ±2.0% | - |
| Quiescent Current (No Load) | 20 | µA |
| Quiescent Current (1 A Load) | 200 | µA |
| Quiescent Current (Off Mode) | 1 | µA |
| Noise Voltage (10 Hz to 100 kHz) | 30 | µV RMS |
| Power Supply Rejection Ratio (PSRR) | 70 dB | - |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | DFN6 (3x3 mm) | - |
Key Features
- AEC-Q100 qualified for automotive applications
- Ultra-low dropout voltage (200 mV typ. at 1 A load)
- Very low quiescent current (20 µA typ. at no load, 200 µA typ. at 1 A load, 1 µA max. in off mode)
- Very low-noise with no bypass capacitor (30 µV RMS at VOUT = 0.8 V)
- Logic-controlled electronic shutdown
- Stable with ceramic capacitors (COUT = 1 µF)
- Internal current and thermal limit
- 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
Applications
- Low power battery-powered applications
- Printers
- Game consoles
- Computers
- Consumer electronics
- Automotive post-regulation
Q & A
- What is the maximum output current of the LD39100PURY?
The maximum output current is 1 A. - What is the input voltage range for the LD39100PURY?
The input voltage range is from 1.5 V to 5.5 V. - What is the typical dropout voltage of the LD39100PURY?
The typical dropout voltage is 200 mV at 1 A load. - What is the quiescent current of the LD39100PURY in no-load and 1 A load conditions?
The quiescent current is 20 µA at no load and 200 µA at 1 A load. - Does the LD39100PURY have built-in protection features?
Yes, it includes short-circuit constant current limiting and thermal protection. - What is the operating temperature range of the LD39100PURY?
The operating temperature range is from -40 °C to 125 °C. - What package type is the LD39100PURY available in?
The LD39100PURY is available in a DFN6 (3x3 mm) package. - Is the LD39100PURY AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified for automotive applications. - What is the noise voltage specification of the LD39100PURY?
The noise voltage is 30 µV RMS at VOUT = 0.8 V. - Can the output voltage of the LD39100PURY be adjusted?
Yes, the output voltage can be adjusted from 0.8 V with a 100 mV step up to 4.5 V.
