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Product Detailed Parameters
- Description：IC REG LIN 3.5V 200MA SOT-323-5
- 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)：3.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：60 µA
- Current - Supply (Max)：100 µA
- PSRR：55dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：5-TSSOP, SC-70-5, SOT-353
- Supplier Device Package：SOT-323-5
- Grade：-
- Qualification：-
Download product information
Overview
The LDK120C35R is a low-dropout linear voltage regulator manufactured by STMicroelectronics, belonging to the LDK120 series. It provides a maximum output current of 200 mA with an input supply voltage range of 1.9 V to 5.5 V. The device features a typical dropout voltage of 100 mV at a 100 mA load and maintains stability using a ceramic capacitor on the output. It offers a fixed output voltage of 3.5 V with a tolerance of ±2.0% at 25 °C. The quiescent current is maximized at 100 μA, reducing to less than 1 μA in shutdown mode. The component operates within a temperature range of -40 °C to +125 °C and is housed in a SOT-323-5L surface-mount package.
Feature Summary
- Ultra-low dropout voltage performance suitable for battery-powered applications
- Logic-controlled electronic shutdown function for minimal power consumption
- Internal constant current limiting and thermal protection mechanisms
Applications
- Low-power battery-operated consumer electronics
- Portable devices requiring stable voltage regulation
- Always-on automotive body and interior functions
Procurement Notes
Verify the specific suffix 'C35' confirms the fixed 3.5 V output variant against the manufacturer's official documentation. Ensure the ordering code matches the SOT-323-5L package configuration. Confirm RoHS compliance status through the designated datasheet or environmental file provided by STMicroelectronics prior to final procurement decisions.
Selection Notes
Select this component when a fixed 3.5 V output is required from an input range of 1.9 V to 5.5 V. It is appropriate for designs prioritizing low noise and minimal quiescent current. Consider the SOT-323-5L package constraints and the requirement for a ceramic output capacitor for stability. Evaluate if the 200 mA current capability meets the system load requirements under all operating conditions.
Part Context
The LDK120C35R is part of the LDK120 family of ultra-low dropout regulators designed for cost-effective power management. This series emphasizes low static current and very low noise characteristics. The family includes adjustable versions and various fixed output voltages, catering to diverse portable and industrial application needs while maintaining high efficiency and compact form factors.
Replacement Considerations
Consult the official LDK120 datasheet for confirmed substitute part numbers. Verify compatibility regarding output voltage, current rating, and package dimensions before substitution.
