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Product Detailed Parameters
- Description：IC REG LINEAR 4V 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)：13.2V
- Voltage - Output (Min/Fixed)：4V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.35V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：90 µA
- Current - Supply (Max)：100 µA
- PSRR：55dB ~ 50dB (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 LDK220PU40R is a fixed-output linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 4V with a maximum continuous output current of 200mA. The device operates from an input voltage range of 2.5V to 13.2V and features a typical dropout voltage of 100mV at 100mA load, with a maximum specified at 0.35V under full load conditions. Quiescent current is typically 90µA, reducing to less than 1µA in shutdown mode via the enable pin. It includes overcurrent protection and thermal shutdown, housed in a compact 6-DFN (1.2x1.3mm) surface-mount package.
Feature Summary
- Logic-controlled electronic shutdown function enables deep sleep mode for extended battery life
- Integrated short-circuit constant current limiting and thermal protection safeguards against overload
- Compatible with small ceramic output capacitors for stable operation in space-constrained designs
Applications
- Battery-powered portable electronics requiring efficient power management
- Low-noise analog circuit supply rails
- Embedded systems utilizing ceramic capacitor stabilization
Procurement Notes
Verify the specific suffix 'PU40R' corresponds to the 4V fixed output variant within the DFN-6 package. Confirm RoHS3 compliance status and moisture sensitivity level requirements during storage and handling. Ensure ordering documentation matches the manufacturer's part number exactly to avoid confusion with adjustable or different voltage versions in the same series.
Selection Notes
Select this component when a precise 4V rail is required with minimal footprint constraints. The low quiescent current makes it suitable for energy-efficient applications. Verify that the input voltage remains within the 13.2V maximum limit and that the thermal dissipation capabilities of the 6-DFN package are sufficient for the expected load current and ambient temperature conditions.
Part Context
This device belongs to the LDK220 series of low-dropout regulators designed for high efficiency and low noise performance. The series offers various fixed output voltages and adjustable options across multiple packages including SOT-23-5 and DFN-6. The LDK220PU40R specifically targets applications needing a compact solution with reliable regulation and robust protection features.
Replacement Considerations
LDK220PU33R: Fixed 3.3V output in identical package. LDK220PU50R: Fixed 5V output in identical package. LDK220M40R: Fixed 4V output in SOT-23-5 package.
