Overview
The LDLN025J28R 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 clean output voltage, making it suitable for ultra-sensitive loads such as Analog-to-Digital Converters (ADC), Voltage-Controlled Oscillators (VCO), and wireless LAN devices. The LDLN025J28R 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 | Value | Unit |
|---|---|---|
| Operating Input Voltage Range | 1.5 to 5.5 | V |
| Output Current | Up to 250 | mA |
| Quiescent Current at No-Load | 12 | μA |
| Dropout Voltage at 250 mA | 120 | mV |
| Output Voltage Accuracy | ±2% (across line, load, and temperature) | % |
| Output Voltage Versions | From 1 V to 5 V, with 50 mV step | V |
| PSRR | 80 dB @ 100 Hz, 60 dB @ 100 kHz | dB |
| Output Noise | 6.5 μV RMS | μV RMS |
| Temperature Range | -40 to +125 | °C |
| Packages | Flip-Chip4, DFN4-1x1, SOT23-5L |
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: 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
- Noise-sensitive loads such as ADC and VCO in mobile phones and tablets
- Wireless LAN devices
- Image sensors and instrumentation
- RF modules and other battery-powered devices requiring long standby times
Q & A
- What is the input voltage range of the LDLN025J28R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the maximum output current of the LDLN025J28R?
The maximum output current is up to 250 mA.
- What is the quiescent current at no-load for the LDLN025J28R?
The quiescent current at no-load is 12 μA.
- What is the dropout voltage at 250 mA load for the LDLN025J28R?
The dropout voltage at 250 mA load is typically 120 mV.
- What is the output noise of the LDLN025J28R?
The output noise is 6.5 μV RMS.
- Does the LDLN025J28R have overcurrent and thermal protections?
Yes, it includes overcurrent and thermal protections.
- What are the available package options for the LDLN025J28R?
The available packages are Flip-Chip4, DFN4-1x1, and SOT23-5L.
- What is the temperature range for the LDLN025J28R?
The operating temperature range is from -40 °C to +125 °C.
- Is the LDLN025J28R stable with ceramic capacitors?
Yes, it is stable with ceramic capacitors.
- What are typical applications for the LDLN025J28R?
Typical applications include noise-sensitive loads such as ADC, VCO in mobile phones and tablets, and wireless LAN devices.
