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Product Detailed Parameters
- Description：IC REG BUCK 5V 1.2A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4.3V
- Voltage - Input (Max)：38V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：1.2A
- Frequency - Switching：200kHz ~ 2MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
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Overview
The LT3971IDD-5#TRPBF is a monolithic buck switching regulator from Analog Devices, featuring a fixed 5V output and 1.2A current capability. It operates with an input voltage range of 4.3V to 38V at a 2MHz switching frequency. The device utilizes Burst Mode operation for ultralow quiescent current consumption of 2.8µA during regulation and reduces supply current to 700nA in shutdown mode. Packaged in a 10-lead DFN (DFN-10) format, it supports an operating temperature range from -40°C to +125°C.
Feature Summary
- Integrates a high-efficiency internal switch and boost Schottky diode within a compact DFN package.
- Employs internally compensated current-mode topology for fast transient response and loop stability.
- Features capacitor-based soft-start control on the SS pin to manage inrush current.
- Includes a power good flag that signals when the output voltage reaches 91% of the programmed level.
Applications
- Battery-powered portable equipment requiring extended runtime
- Industrial systems with wide input voltage ranges
- Embedded controllers needing efficient step-down conversion
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging rather than tube. Confirm the IDD designation matches the required DFN-10 footprint. Cross-reference the datasheet revision to ensure compatibility with your design specifications. Validate RoHS compliance status through official manufacturer channels before finalizing procurement orders.
Selection Notes
Select this component for designs prioritizing low standby power and small physical size. The fixed 5V output eliminates external resistor networks for standard logic levels. Ensure the thermal performance of the DFN-10 package meets the system's heat dissipation requirements under maximum load conditions.
Part Context
This part belongs to the LT3971 family of high-voltage step-down regulators. It shares architectural similarities with the LT3970 and LT3973 series but offers distinct output configurations and current ratings. The LT3971 specifically targets applications requiring higher output current compared to the LT3970 while maintaining similar efficiency characteristics.
Replacement Considerations
LT3971IDD-5#PBF serves as the tube-packaged equivalent of this reel-part. Verify pinout compatibility if substituting between packaging types. No direct functional replacements are documented in the provided source material.
