Overview
The LDLN025M33R is a 250 mA low-dropout voltage regulator produced by STMicroelectronics. This device is part of the LDLN025 series, known for its ultra-low noise and high power supply rejection ratio (PSRR). The LDLN025M33R operates with an input voltage range from 1.5 V to 5.5 V and provides a stable output voltage of 3.3 V. It is designed to extend battery life in applications requiring long standby times due to its very low quiescent current of 12 μA at no-load. The regulator also features an enable logic control function that allows it to enter a shutdown mode, reducing total current consumption to less than 1 μA. Additionally, it includes short-circuit and thermal protection, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 1.5 V to 5.5 V |
| Output Voltage (nominal) | 3.3 V |
| Output Current (nominal) | 250 mA |
| Output Tolerance (typical) | 2% |
| Quiescent Current (no-load) | 12 μA |
| Dropout Voltage (at 250 mA) | 120 mV |
| PSRR (typical) | 80 dB @ 100 Hz, 60 dB @ 100 kHz |
| Output Noise (RMS) | 6.5 μV |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Options | SOT23-5L, DFN4 1x1, Flip-Chip4 |
Key Features
- Ultra-low output noise: 6.5 μV RMS
- Very low quiescent current: 12 μA at no-load
- Very low-dropout voltage: 120 mV at 250 mA
- High PSRR: up to 80 dB @ 100 Hz, 60 dB @ 100 kHz
- Output voltage accuracy: 2% across line, load, and temperature
- Logic-controlled electronic shutdown and output discharge feature
- Internal soft-start and overcurrent and thermal protections
- Stable with ceramic capacitors
Applications
The LDLN025M33R is suitable for noise-sensitive applications such as:
- Analog-to-Digital Converters (ADC)
- Voltage-Controlled Oscillators (VCO) in mobile phones and tablets
- Wireless LAN devices
- Battery-powered devices requiring long standby times
Q & A
- What is the input voltage range of the LDLN025M33R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the nominal output voltage of the LDLN025M33R?
The nominal output voltage is 3.3 V.
- What is the maximum output current of the LDLN025M33R?
The maximum output current is 250 mA.
- What is the quiescent current at no-load for the LDLN025M33R?
The quiescent current at no-load is 12 μA.
- What is the dropout voltage at 250 mA for the LDLN025M33R?
The dropout voltage at 250 mA is 120 mV.
- What is the PSRR of the LDLN025M33R?
The PSRR is up to 80 dB @ 100 Hz and 60 dB @ 100 kHz.
- What is the output noise of the LDLN025M33R?
The output noise is 6.5 μV RMS.
- What are the package options for the LDLN025M33R?
The package options include SOT23-5L, DFN4 1x1, and Flip-Chip4.
- Does the LDLN025M33R have overcurrent and thermal protection?
Yes, it includes overcurrent and thermal protection features.
- Is the LDLN025M33R stable with ceramic capacitors?
Yes, it is stable with ceramic capacitors.
