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R1225N122A-TR-FE
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Product Detailed Parameters
- Description：18.5V INPUT PWM/VFM STEP-DOWN DC
- Series：-
- Mfr：Nisshinbo Micro Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：PWM
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.3V ~ 18.5V
- Frequency - Switching：300kHz
- Duty Cycle (Max)：100%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-6
- Supplier Device Package：SOT-23-6W
- Grade：-
- Qualification：-
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Overview
The R1225N122A-TR-FE is a step-down DC/DC controller manufactured by Nisshinbo Micro Devices. It supports an input voltage range of 2.3 V to 18.5 V and operates with PWM or VFM control modes. The device features a fixed switching frequency of 300 kHz and provides a single output. It is housed in a SOT-23W-6 package and functions within a temperature range of -40°C to +85°C.
Feature Summary
- Supports both Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM) for efficient operation across varying load conditions.
- Accepts wide input voltage ranges up to 18.5 V, suitable for diverse power supply applications.
- Integrates a fixed 300 kHz switching frequency to optimize external component size and performance.
Applications
- Portable electronic devices requiring efficient step-down conversion
- Battery-powered systems utilizing lithium-ion or lithium-polymer cells
- General-purpose DC-DC power management circuits
Procurement Notes
Verify the complete part number including the suffix against official Nisshinbo documentation to ensure correct packaging and specifications. Confirm that the SOT-23W-6 package type matches your PCB footprint requirements. Check RoHS compliance status through the manufacturer's official channels prior to integration into production designs.
Selection Notes
Select this controller when a wide input voltage range and compact form factor are required. The choice between PWM and VFM modes should align with efficiency targets at light versus heavy loads. Ensure the external inductor and capacitor values are compatible with the 300 kHz switching frequency for stable regulation.
Part Context
This component belongs to the R1225N series of switching controllers from Nisshinbo Micro Devices. The series focuses on providing flexible buck converter solutions with integrated control logic. The specific model denotes a fixed-output configuration variant designed for standard voltage rails.
Replacement Considerations
Consult Nisshinbo Micro Devices official cross-reference lists for verified substitutes. Potential alternatives may include other models within the R1225N family or comparable buck controllers from other manufacturers, provided pinout and electrical characteristics match.
