Overview
The LDLN025M18R is a 250 mA ultra-low noise Low-Dropout (LDO) voltage regulator produced by STMicroelectronics. This device operates within an input voltage range of 1.5 V to 5.5 V and is designed to provide a very clean output, making it suitable for ultra-sensitive loads. The LDLN025M18R features an ultra-low output noise of 6.5 μV RMS and a high Power Supply Rejection Ratio (PSRR) of 80 dB at 100 Hz and 60 dB at 100 kHz. The device is available in several small package options, including Flip-Chip4, DFN4-1x1, and SOT23-5L.
The typical dropout voltage at 250 mA load is 120 mV, and the quiescent current is very low at 12 μA at no-load, which extends the battery life of applications requiring long standby times. The enable logic control function allows the device to enter a shutdown mode with a total current consumption lower than 1 μA. Additionally, the device includes short-circuit and thermal protection, as well as an internal soft-start and output discharge feature.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Input Voltage Range | 1.5 | 5.5 | V | |
| Output Current | 250 | mA | ||
| Output Voltage Accuracy | -2.0 | +2.0 | % | |
| Quiescent Current (No-load) | 12 | μA | ||
| Dropout Voltage at 250 mA | 120 | mV | ||
| Output Noise | 6.5 | μV RMS | ||
| PSRR at 100 Hz | 80 | dB | ||
| PSRR at 100 kHz | 60 | dB | ||
| Temperature Range | -40 | +125 | °C |
Key Features
- Ultra low output noise: 6.5 μV RMS
- Operating input voltage range: 1.5 V to 5.5 V
- Output current up to 250 mA
- Very low quiescent current: 12 μA at no-load
- Controlled quiescent current in dropout condition
- Very low-dropout voltage: 250 mV at 250 mA
- Very high PSRR: 80 dB@100 Hz, 60 dB @ 100 kHz
- Output voltage accuracy: 2% across line, load and temperature
- Output voltage versions: from 1 V to 5 V, with 50 mV step
- Logic-controlled electronic shutdown
- Output discharge feature
- Internal soft-start
- Overcurrent and thermal protections
- Temperature range: from -40 °C to +125 °C
- Packages: Flip-Chip4, DFN4-1x1, SOT23-5L
Applications
- Smartphones and tablets
- Image sensors
- Instrumentation
- VCO and RF modules
- Noise-sensitive loads such as ADC, VCO in mobile phones and tablets, wireless LAN devices
Q & A
- What is the input voltage range of the LDLN025M18R? The input voltage range is from 1.5 V to 5.5 V.
- What is the maximum output current of the LDLN025M18R? The maximum output current is up to 250 mA.
- What is the quiescent current at no-load for the LDLN025M18R? The quiescent current at no-load is 12 μA.
- What is the typical dropout voltage at 250 mA load for the LDLN025M18R? The typical dropout voltage at 250 mA load is 120 mV.
- What is the output noise of the LDLN025M18R? The output noise is 6.5 μV RMS.
- What is the PSRR of the LDLN025M18R at 100 Hz and 100 kHz? The PSRR is 80 dB at 100 Hz and 60 dB at 100 kHz.
- Does the LDLN025M18R have overcurrent and thermal protection? Yes, it includes overcurrent and thermal protections.
- What are the available package options for the LDLN025M18R? The available packages are Flip-Chip4, DFN4-1x1, and SOT23-5L.
- What is the temperature range of the LDLN025M18R? The temperature range is from -40 °C to +125 °C.
- Does the LDLN025M18R have a logic-controlled electronic shutdown feature? Yes, it has a logic-controlled electronic shutdown feature.
