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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.2A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4.3V
- Voltage - Input (Max)：38V
- Voltage - Output (Min/Fixed)：1.19V
- Voltage - Output (Max)：30V
- 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#TRPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It features an adjustable frequency range from 200kHz to 2MHz and accepts input voltages between 4.3V and 38V. The device delivers up to 1.2A of output current in a compact 10-lead DFN package with an exposed pad. It incorporates Burst Mode operation for high efficiency at light loads, maintaining low output ripple. Key electrical characteristics include a quiescent current of 2.8µA during regulation and 1.7µA during shutdown. The component operates within a temperature range of -40°C to +125°C.
Feature Summary
- Synchronous buck topology with integrated power switches
- Adjustable switching frequency from 200kHz to 2MHz
- Burst Mode operation for improved light-load efficiency
- Internal compensation for stable loop performance
Applications
- Battery-powered portable equipment
- Industrial control systems
- Infotainment modules
- Automotive electronics
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the manufacturer designation matches Analog Devices Inc. or Linear Technology. Ensure the part number corresponds to the DFN-10 package variant. Cross-reference the datasheet revision to confirm compatibility with design requirements. Validate RoHS compliance status through official documentation before integration.
Selection Notes
Select this regulator for applications requiring wide input voltage ranges and high efficiency across varying load conditions. The adjustable frequency allows optimization for external component size versus noise performance. Consider the thermal capabilities of the exposed pad DFN package for heat dissipation needs. Evaluate the need for Burst Mode operation to minimize standby power consumption in battery-driven designs.
Part Context
This component belongs to the LT3971 family of high-voltage synchronous buck regulators. It shares architectural similarities with other members like the LT3971EDD and LT3971IMSE, differing primarily in package type and shipping configuration. The series is designed for robust performance in demanding environments, offering reliable voltage regulation with minimal external component count.
Replacement Considerations
Compatible alternatives include LT3971IDD#PBF for tube packaging or LT3971EMSE variants for MSOP packages. Verify pinout compatibility and thermal resistance differences when substituting packages. Ensure the replacement maintains the same input voltage range and output current capabilities.
