Overview
The LD39015M12R is a low-dropout linear voltage regulator from STMicroelectronics, designed to provide a maximum current of 150 mA. This regulator is part of the LD39015 series, which is characterized by its ultra-low dropout voltage, low quiescent current, and low noise. The LD39015M12R operates with an input voltage range from 1.5 V to 5.5 V and has a nominal output voltage of 1.2 V. It is particularly suited for low-power battery-powered applications such as mobile phones, personal digital assistants (PDAs), and cordless phones due to its low power consumption and high stability with ceramic capacitors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.5 to 5.5 | V |
| Output Voltage (Nominal) | 1.2 | V |
| Output Voltage Tolerance | ± 2.0% @ 25 °C | % |
| Guaranteed Output Current | 150 | mA |
| Dropout Voltage (Typical) | 80 | mV @ 100 mA load |
| Quiescent Current (Typical) | 18 µA @ no load, 38 µA @ 150 mA load | µA |
| Noise Voltage (Typical) | 29 µVRMS @ VOUT = 0.8 V | µVRMS |
| Operating Temperature Range | -40 to 125 | °C |
| Package | SOT23-5L |
Key Features
- Ultra-low dropout voltage (80 mV typical at 100 mA load)
- Very low quiescent current (18 µA typical at no load, 38 µA typical at 150 mA load, 1 µA maximum 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 limit
- High power supply rejection ratio (65 dB at low frequencies)
Applications
The LD39015M12R is suitable for a variety of low-power battery-powered applications, including:
- Mobile phones
- Personal digital assistants (PDAs)
- Cordless phones
- Other battery-powered systems requiring low noise and low dropout voltage
Q & A
- What is the input voltage range of the LD39015M12R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the nominal output voltage of the LD39015M12R?
The nominal output voltage is 1.2 V.
- What is the maximum guaranteed output current of the LD39015M12R?
The maximum guaranteed output current is 150 mA.
- What is the typical dropout voltage of the LD39015M12R at 100 mA load?
The typical dropout voltage is 80 mV at 100 mA load.
- What is the quiescent current of the LD39015M12R at no load and at 150 mA load?
The quiescent current is 18 µA typical at no load and 38 µA typical at 150 mA load.
- Does the LD39015M12R have built-in thermal protection?
- What is the operating temperature range of the LD39015M12R?
The operating temperature range is from -40 °C to 125 °C.
- Is the LD39015M12R compatible with ceramic capacitors?
- How does the enable logic control function work on the LD39015M12R?
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 is the power supply rejection ratio (PSRR) of the LD39015M12R at low frequencies?
The PSRR is 65 dB at low frequencies.
