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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.2A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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)
- Grade：-
- Qualification：-
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Overview
The LT3971EDD is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4.3V to 38V and delivers up to 1.2A of output current. The device features a fixed 2MHz switching frequency and ultra-low quiescent current consumption of 2.8µA during regulation, dropping to 1.7µA in shutdown mode. It utilizes a DFN-10 package with an exposed pad for thermal management and supports operation from -40°C to +125°C.
Feature Summary
- Integrates a high-efficiency synchronous buck topology with a low on-resistance internal switch.
- Features Burst Mode operation to maintain high efficiency at light loads while minimizing output ripple.
- Includes programmable soft-start and power good flag functionality for controlled startup and monitoring.
Applications
- Battery-powered portable equipment requiring extended runtime
- Industrial control systems with wide input voltage ranges
- Automotive electronics operating under varying line conditions
Procurement Notes
Verify the specific suffix (e.g., #PBF) to confirm lead-free compliance and packaging type. Confirm availability status as supply may be limited or subject to factory order constraints. Ensure the selected variant matches the required output voltage configuration for the target application design.
Selection Notes
Select this component when a compact solution is needed for high-input voltage applications. The fixed 2MHz frequency allows for smaller external inductors compared to lower-frequency alternatives. Consider the DFN-10 package for its thermal performance and small footprint in space-constrained designs.
Part Context
This part belongs to the LT3971 family of monolithic buck regulators designed for high efficiency and low noise. The series is characterized by its ability to handle wide input voltages while maintaining stable regulation. It serves as a key power management IC for systems requiring reliable DC-DC conversion in harsh environments.
Replacement Considerations
Check for LT3971 variants with different output voltage settings or package options such as MSOP-10. Verify compatibility with existing PCB footprints when considering alternative packages within the same family.
