ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 250MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.2V @ 250mA
- Current - Output：250mA
- Current - Quiescent (Iq)：25 µA
- Current - Supply (Max)：425 µA
- PSRR：80dB ~ 60dB (100Hz ~ 100KHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Short Circuit, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
Download product information
Overview
The LDLN025M33R is a 250 mA ultra-low noise Low Dropout (LDO) voltage regulator manufactured by STMicroelectronics. It operates within an input voltage range of 1.5 V to 5.5 V, delivering a fixed 3.3 V output with high precision. The device features an ultra-low quiescent current of 12 μA at no-load and consumes less than 1 μA in shutdown mode via logic-controlled enable. Key electrical characteristics include an output noise of 6.5 μV RMS, a typical dropout voltage of 120 mV at full load, and high Power Supply Rejection Ratio (PSRR). It supports ceramic capacitors for stability and includes internal protections against overcurrent and thermal overload.
Feature Summary
- Ultra-low output noise and high PSRR ensure clean power delivery for sensitive analog loads
- Logic-controlled electronic shutdown enables deep sleep modes with minimal current consumption
- Integrated short-circuit and thermal protection safeguards the device under fault conditions
- Designed for stable operation using standard ceramic output capacitors
Applications
- Powering Analog-to-Digital Converters (ADCs) requiring low-noise supplies
- Voltage regulation for Voltage-Controlled Oscillators (VCOs) in mobile devices
- Power management in wireless LAN equipment and IoT nodes
Procurement Notes
Verify the specific package variant when ordering, as the LDLN025 series is available in Flip-Chip4, DFN4-1x1, and SOT23-5L configurations. Confirm that the M33 suffix corresponds to the required 3.3 V fixed output voltage. Ensure compatibility with the target PCB footprint for the selected package option before finalizing procurement.
Selection Notes
Select this component for battery-powered applications where extending standby time is critical due to its ultra-low quiescent current profile. It is suitable for designs requiring strict noise immunity for RF or precision analog circuits. Verify that the maximum input voltage does not exceed 5.5 V and that the load current remains within the 250 mA limit to maintain specified performance levels.
Part Context
The LDLN025 belongs to STMicroelectronics' family of ultra-low noise LDO regulators designed for high-performance embedded systems. This series emphasizes power efficiency and signal integrity, making it distinct from standard linear regulators. It complements other ST power management solutions by addressing the specific needs of noise-sensitive peripherals in portable and industrial electronics.
Replacement Considerations
Direct pin-compatible substitutes are not explicitly confirmed in public documentation. Engineers should evaluate other ST LDOs within the same family for similar electrical specifications, ensuring matching output voltage, current capacity, and package dimensions.
