Overview
The LDLN025M28R 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 LDLN025M28R operates with an input voltage range from 1.5 V to 5.5 V and provides an output voltage of 2.8 V with a tolerance of 2% across line, load, and temperature. It features a very low quiescent current of 12 μA at no-load, extending the battery life in applications requiring long standby times. The device includes logic-controlled electronic shutdown, output discharge feature, internal soft-start, and overcurrent and thermal protections, making it suitable for noise-sensitive loads such as ADC, VCO in mobile phones and tablets, and wireless LAN devices.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Input Voltage Range | 1.5 | 5.5 | V | |
| Output Voltage (nominal) | 2.8 | V | ||
| Output Voltage Tolerance | -2.0 | +2.0 | % | |
| Output Current | 250 | mA | ||
| Quiescent Current (no-load) | 12 | μA | ||
| Dropout Voltage at 250 mA | 120 | mV | ||
| PSRR at 100 Hz / 100 kHz | 80 / 60 | dB | ||
| Output Noise (RMS) | 6.5 | μV | ||
| Operating Temperature Range | -40 | +125 | °C | |
| Packages | Flip-Chip4, DFN4-1x1, 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 Iq in dropout condition
- Very low-dropout voltage: 120 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, and wireless LAN devices
Q & A
- What is the input voltage range of the LDLN025M28R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the nominal output voltage of the LDLN025M28R?
The nominal output voltage is 2.8 V.
- What is the maximum output current of the LDLN025M28R?
The maximum output current is 250 mA.
- What is the quiescent current at no-load for the LDLN025M28R?
The quiescent current at no-load is 12 μA.
- What is the dropout voltage at 250 mA for the LDLN025M28R?
The dropout voltage at 250 mA is typically 120 mV.
- What is the PSRR of the LDLN025M28R at 100 Hz and 100 kHz?
The PSRR is 80 dB at 100 Hz and 60 dB at 100 kHz.
- What is the output noise of the LDLN025M28R?
The output noise is 6.5 μV RMS.
- What are the available package options for the LDLN025M28R?
The available packages are Flip-Chip4, DFN4-1x1, and SOT23-5L.
- Does the LDLN025M28R have overcurrent and thermal protections?
Yes, it includes overcurrent and thermal protections.
- What is the operating temperature range of the LDLN025M28R?
The operating temperature range is from -40 °C to +125 °C.
