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Product Detailed Parameters
- Description：IC REG BUCK 5V 1.2A 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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 LT3971EDD-5#PBF 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 provides a fixed 5V output at up to 1.2A. The device features a 2MHz adjustable switching frequency and ultra-low quiescent current of 2.8µA during regulation, dropping to 1.7µA in standby. 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 0.33Ω power switch and boost Schottky diode within the monolithic die.
- Employs internally compensated current mode topology for fast transient response and loop stability.
- Features Burst Mode operation to maintain high efficiency at low output currents while minimizing output ripple.
Applications
- Battery-powered systems requiring wide input voltage tolerance
- Industrial equipment with varying supply rails
- Automotive electronics operating under fluctuating load conditions
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm RoHS compliance status via official documentation. Check for recent manufacturing changes such as epoxy updates or marking modifications. Ensure storage conditions meet humidity sensitivity requirements prior to assembly.
Selection Notes
Select this part when a fixed 5V output is required from a wide input range up to 38V. Consider the DFN-10 package for compact designs needing efficient heat dissipation. Evaluate the 2MHz switching frequency against EMI constraints and external component size requirements. Compare quiescent current specifications against system sleep mode demands.
Part Context
This component belongs to the LT3971 family of buck regulators designed for high efficiency and low noise applications. It shares architectural similarities with the LT3971A series but differs in specific electrical characteristics such as reference accuracy and pin current specifications. The DFN-10 package variant offers improved thermal performance compared to MSOP options.
Replacement Considerations
LT3971EDD-5#TRPBF serves as the tape-and-reel equivalent for automated assembly processes. Verify pinout compatibility and thermal pad connectivity when substituting between tube and reel packaging formats.
