Overview
The LDLN025PU18R is a 250 mA ultra-low noise Low-Dropout (LDO) voltage regulator produced by STMicroelectronics. This device is designed to operate with an input voltage range from 1.5 V to 5.5 V and provides an output current of up to 250 mA. The LDLN025PU18R is notable for its ultra-low output noise of 6.5 μV RMS, making it suitable for noise-sensitive applications such as ADCs, VCOs in mobile phones and tablets, and wireless LAN devices. The regulator features a very low quiescent current of 12 μA at no-load, which extends the battery life of applications requiring long standby times. It also includes logic-controlled electronic shutdown, output discharge feature, internal soft-start, and overcurrent and thermal protections.
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 | % | |
| Output Voltage (Nominal) | 1.8 | V | ||
| Quiescent Current (No-load) | 12 | μA | ||
| Dropout Voltage at 250 mA | 120 | mV | ||
| PSRR at 100 Hz | 80 | dB | ||
| PSRR at 100 kHz | 60 | dB | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Package Options | DFN4-1x1, Flip-Chip4, SOT23-5L |
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
Applications
- Smartphones and tablets
- Image sensors
- Instrumentation
- VCO and RF modules
- Noise-sensitive loads such as ADCs and VCOs in mobile devices and wireless LAN devices
Q & A
- What is the input voltage range of the LDLN025PU18R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the maximum output current of the LDLN025PU18R?
The maximum output current is up to 250 mA.
- What is the quiescent current at no-load for the LDLN025PU18R?
The quiescent current at no-load is 12 μA.
- What is the output voltage accuracy of the LDLN025PU18R?
The output voltage accuracy is 2% across line, load, and temperature.
- What are the package options available for the LDLN025PU18R?
The package options include DFN4-1x1, Flip-Chip4, and SOT23-5L.
- What is the typical dropout voltage at 250 mA load for the LDLN025PU18R?
The typical dropout voltage at 250 mA load is 120 mV.
- Does the LDLN025PU18R have overcurrent and thermal protections?
Yes, it includes overcurrent and thermal protections.
- What is the operating junction temperature range for the LDLN025PU18R?
The operating junction temperature range is from -40 °C to +125 °C.
- Is the LDLN025PU18R suitable for noise-sensitive applications?
Yes, it is suitable due to its ultra-low output noise and high PSRR.
- Does the LDLN025PU18R have a logic-controlled electronic shutdown feature?
Yes, it includes a logic-controlled electronic shutdown feature.
