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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 200MA SOT23-5
- Series：-
- Mfr：Runic Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：7.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：200mA
- Current - Quiescent (Iq)：-
- Current - Supply (Max)：-
- PSRR：48dB ~ 36dB (217Hz ~ 1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The RS3221-1.8YF5 is a fixed-output linear low-dropout (LDO) voltage regulator manufactured by Runic Technology. It provides a stable 1.8V output with a maximum current capacity of 200mA. The device operates within an input voltage range up to 7.5V and features a positive output configuration. Key electrical specifications include a power supply rejection ratio (PSRR) of 48dB at 217Hz and 36dB at 1kHz. It incorporates overcurrent and overtemperature protection mechanisms and supports an enable control feature. The component is designed for surface-mount installation in SOT-23-5 packages and functions reliably across a temperature range of -40°C to +85°C.
Feature Summary
- Integrated overcurrent and thermal shutdown protection for enhanced circuit reliability
- Supports external enable control for power management flexibility
- High power supply rejection ratio ensures clean output voltage stability
Applications
- Portable battery-powered consumer electronics
- Embedded systems requiring stable low-voltage regulation
- Industrial control modules with strict noise sensitivity requirements
Procurement Notes
Verify the specific suffix YF5 corresponds to the SOT-23-5 package and tape-and-reel shipping format when ordering. Confirm that the 1.8V fixed output variant matches the target design voltage. Ensure compatibility with RoHS3 standards if required by regional regulations. Check manufacturer datasheets for moisture sensitivity level handling procedures prior to assembly.
Selection Notes
Select this component when a compact, low-cost LDO is needed for currents up to 200mA. The SOT-23-5 package suits space-constrained designs. Verify that the input voltage does not exceed 7.5V and that the dropout voltage at the expected load current remains within system limits. Consider the PSRR performance if the application involves noisy power rails.
Part Context
The RS3221 series from Runic Technology comprises various fixed-output LDO regulators available in multiple voltage options and packages. This family targets general-purpose power management needs in portable and industrial devices. The RS3221-1.8YF5 specifically addresses applications requiring a precise 1.8V rail with moderate current drive capabilities in a small footprint.
Replacement Considerations
Direct substitutes may include other 200mA LDOs in SOT-23-5 packages with 1.8V output. Verify pinout compatibility and thermal characteristics before swapping. Cross-reference PSRR and dropout voltage specifications to ensure equivalent performance in the target circuit.
