Overview
The LD39015M33R is a low quiescent current and low noise voltage regulator from STMicroelectronics. This device is part of the LD39015 series, which offers a maximum current of 150 mA and an input voltage range from 1.5 V to 5.5 V. The LD39015M33R is specifically designed to provide an output voltage of 3.3 V. It features an ultra-low dropout voltage of 80 mV at 100 mA load, making it suitable for low power battery-powered applications. The regulator is stable with ceramic capacitors and includes features such as logic-controlled electronic shutdown, internal current and thermal limiting, and very low noise operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.5 to 5.5 | V |
| Output Voltage (nominal) | 3.3 | V |
| Output Voltage Tolerance | ± 2.0% @ 25 °C | % |
| Guaranteed Output Current | 150 | mA |
| Dropout Voltage (typ. at 100 mA load) | 80 | mV |
| Quiescent Current (typ. at no load) | 18 | µA |
| Quiescent Current (typ. at 150 mA load) | 38 | µA |
| Quiescent Current (max. in OFF mode) | 1 | µA |
| Output Noise Voltage (RMS at VOUT = 0.8 V) | 29 | µV |
| Power Supply Rejection Ratio (PSRR) at low frequencies | 65 | dB |
| Operating Temperature Range | -40 to 125 | °C |
| Package | SOT23-5L |
Key Features
- Ultra-low dropout voltage (80 mV typ. at 100 mA load)
- Very low quiescent current (18 µA typ. at no load, 38 µA typ. at 150 mA load, 1 µA max. in OFF mode)
- Very low noise without bypass capacitor (29 µVRMS at VOUT = 0.8 V)
- Logic-controlled electronic shutdown
- Compatible with ceramic capacitors (CO = 1 µF)
- Internal current and thermal limiting
- Wide range of output voltages available on request: 0.8 V to 3.3 V with 100 mV step
Applications
The LD39015M33R is suitable for various low power battery-powered applications, including:
- Mobile phones
- Personal digital assistants (PDAs)
- Cordless phones
- Other similar battery-powered systems
Q & A
- What is the input voltage range of the LD39015M33R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the nominal output voltage of the LD39015M33R?
The nominal output voltage is 3.3 V.
- What is the typical dropout voltage of the LD39015M33R at 100 mA load?
The typical dropout voltage is 80 mV.
- What is the quiescent current of the LD39015M33R at no load and at 150 mA load?
The quiescent current is typically 18 µA at no load and 38 µA at 150 mA load.
- Does the LD39015M33R have built-in thermal protection?
- What is the operating temperature range of the LD39015M33R?
The operating temperature range is from -40 °C to 125 °C.
- Is the LD39015M33R compatible with ceramic capacitors?
- What is the power supply rejection ratio (PSRR) of the LD39015M33R at low frequencies?
The PSRR is 65 dB at low frequencies.
- How does the enable logic control function work on the LD39015M33R?
The enable logic control function puts the device in shutdown mode when the enable pin is low, allowing a total current consumption lower than 1 µA.
- What are typical applications for the LD39015M33R?
Typical applications include mobile phones, personal digital assistants (PDAs), cordless phones, and other similar battery-powered systems.
