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Product Detailed Parameters
- Description：IC REG LINEAR 3.2V 200MA 6-DFN
- 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)：3.2V
- 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：6-XFDFN
- Supplier Device Package：6-DFN (1.2x1.3)
- Grade：-
- Qualification：-
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Overview
The LDK120PU32R is a positive, fixed-output linear low-dropout regulator manufactured by STMicroelectronics. It provides a maximum output current of 200 mA with a fixed output voltage of 3.2 V. The device operates within an input voltage range of 1.9 V to 5.5 V and features a typical dropout voltage of 100 mV at 100 mA load. Key electrical parameters include a maximum quiescent current of 100 µA, a shutdown current below 1 µA, and a power supply rejection ratio (PSRR) of 55 dB from 120 Hz to 10 kHz. It incorporates overcurrent and thermal protection mechanisms.
Feature Summary
- Logic-controlled electronic shutdown function enables ultra-low power consumption in standby modes
- Integrated short-circuit current limiting and thermal protection safeguards against fault conditions
- Compatible with small ceramic output capacitors for stable operation in compact designs
Applications
- Low-power battery-powered consumer electronics
- Portable communication equipment
- Computer peripherals requiring efficient voltage regulation
Procurement Notes
Verify the specific package type and output voltage tolerance against project requirements before ordering. Confirm that the 6-DFN footprint matches the PCB layout constraints. Ensure input voltage remains within the specified 1.9 V to 5.5 V range during all operating conditions to maintain regulatory performance and prevent damage.
Selection Notes
Select this component when a fixed 3.2 V rail is required with minimal external components. It is suitable for applications prioritizing low noise and high PSRR in the audio or RF frequency bands. Consider the SOT-23-5 or DFN packages based on available board space and thermal dissipation needs relative to the expected load current.
Part Context
This part belongs to the LDK120 series of low-dropout regulators designed for efficiency and noise sensitivity. The series offers various fixed output voltages and adjustable versions across different package formats including SOT-23-5L, SOT-323-5L, and DFN6. It targets portable devices where battery life and signal integrity are critical design parameters.
Replacement Considerations
Direct substitutes within the same family include LDK120PU30R (3.0 V output) and LDK120PU33R (3.3 V output). For adjustable output requirements in the same package, consider LDK120C-R. Verify pin compatibility and thermal characteristics when swapping between fixed voltage variants.
