Overview
The LDLN025M25R 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, making it versatile for various applications. It features a very low quiescent current of 12 μA at no-load, which significantly extends the battery life in devices requiring long standby times. The LDLN025M25R is particularly suited for noise-sensitive loads due to its ultra-low output noise and high Power Supply Rejection Ratio (PSRR).
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 1.5 V to 5.5 V |
| Output Current | Up to 250 mA |
| Quiescent Current | 12 μA at no-load |
| Dropout Voltage | 250 mV at 250 mA |
| Output Noise | 6.5 μV RMS |
| 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 |
| Package | SOT23-5L |
| Operating Temperature Range | -40 °C to +125 °C |
| Protection Features | Short-circuit and thermal protection |
Key Features
- Ultra-low output noise: 6.5 μV RMS
- 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
Applications
The LDLN025M25R is designed for noise-sensitive applications such as Analog-to-Digital Converters (ADC), Voltage-Controlled Oscillators (VCO) in mobile phones and tablets, and wireless LAN devices. Its low noise and high PSRR make it ideal for ultra-sensitive loads, ensuring a clean output voltage.
Q & A
- What is the input voltage range of the LDLN025M25R?
The input voltage range is from 1.5 V to 5.5 V. - What is the maximum output current of the LDLN025M25R?
The maximum output current is up to 250 mA. - What is the quiescent current of the LDLN025M25R at no-load?
The quiescent current is 12 μA at no-load. - What is the dropout voltage of the LDLN025M25R at 250 mA load?
The dropout voltage is 250 mV at 250 mA load. - What is the output noise of the LDLN025M25R?
The output noise is 6.5 μV RMS. - What is the PSRR of the LDLN025M25R?
The PSRR is 80 dB @ 100 Hz and 60 dB @ 100 kHz. - What is the output voltage accuracy of the LDLN025M25R?
The output voltage accuracy is 2% across line, load, and temperature. - What are the available output voltage versions for the LDLN025M25R?
The output voltage versions range from 1 V to 5 V, with a 50 mV step. - What are the protection features of the LDLN025M25R?
The device includes short-circuit and thermal protection. - What is the operating temperature range of the LDLN025M25R?
The operating temperature range is from -40 °C to +125 °C.
