Overview
The LDLN025J33R 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. The LDLN025J33R features a typical dropout voltage of 120 mV at 250 mA load and an ultra-low quiescent current of 12 μA at no-load, which significantly extends the battery life in devices requiring long standby times. Its high Power Supply Rejection Ratio (PSRR) and low output noise make it suitable for ultra-sensitive loads such as ADCs, VCOs in mobile phones and tablets, and wireless LAN devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.5 to 5.5 | V |
| Output Current | Up to 250 | mA |
| Output Voltage (nominal) | 3.3 | V |
| Output Voltage Tolerance | 2% | |
| Dropout Voltage at 250 mA | 120 | mV |
| Quiescent Current at No-Load | 12 | μA |
| PSRR at 100 Hz / 100 kHz | 80 dB / 60 dB | |
| Output Noise (RMS) | 6.5 | μV |
| Operating Temperature Range | -40 to +125 | °C |
| Packages Available | 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 quiescent current 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
Applications
- Noise-sensitive loads such as ADCs and VCOs in mobile phones and tablets
- Wireless LAN devices
- Image sensors
- Instrumentation
- VCO and RF modules
Q & A
- What is the input voltage range of the LDLN025J33R?
The input voltage range is from 1.5 V to 5.5 V.
- What is the typical dropout voltage at 250 mA load?
The typical dropout voltage is 120 mV at 250 mA load.
- What is the quiescent current at no-load?
The quiescent current at no-load is 12 μA.
- What is the output noise level of the LDLN025J33R?
The output noise level is 6.5 μV RMS.
- What are the available package options for the LDLN025J33R?
The available packages are Flip-Chip4, DFN4-1x1, and SOT23-5L.
- Does the LDLN025J33R have overcurrent and thermal protection?
- What is the operating temperature range of the LDLN025J33R?
The operating temperature range is from -40 °C to +125 °C.
- Is the LDLN025J33R suitable for battery-powered devices?
- What is the PSRR of the LDLN025J33R at 100 Hz and 100 kHz?
The PSRR is 80 dB at 100 Hz and 60 dB at 100 kHz.
- Does the LDLN025J33R have a logic-controlled electronic shutdown feature?
