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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)
- Grade：-
- Qualification：-
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Overview
The LT3971EDD-5 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 output voltage of 5V 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 synchronous switch and boost Schottky diode on-die
- Maintains high efficiency at low load currents via low ripple Burst Mode operation
- Features internally compensated current mode topology for fast transient response
- Includes power good flag signaling when output reaches 91% of programmed voltage
Applications
- Battery-powered systems requiring extended runtime
- Industrial equipment with wide input voltage ranges
- Automotive electronics operating under varying line conditions
- Portable devices needing compact power solutions
Procurement Notes
Verify the specific suffix 'IDD' against the official datasheet to confirm package type (DFN-10) and temperature grade. Ensure compatibility with the DC1527A evaluation kit if prototyping. Confirm RoHS compliance status through manufacturer documentation before finalizing procurement orders.
Selection Notes
Select this component for designs requiring a fixed 5V output from a wide input range up to 38V. The 1.2A current capability suits moderate load applications. Consider the DFN-10 package for space-constrained PCB layouts. Verify that the 2MHz switching frequency aligns with EMI requirements and inductor selection constraints.
Part Context
This part belongs to the LT3971 family of monolithic buck regulators. It shares core architecture with variants like LT3971EMSE-3.3 but differs in output voltage configuration and package style. The series is designed for applications demanding low quiescent current and high efficiency across varying load conditions.
Replacement Considerations
LT3971EDD-3.3#PBF offers identical electrical characteristics with a fixed 3.3V output instead of 5V. LT3971IMSE16#PBF provides similar performance in a MSOP-16 package. Verify pinout compatibility and thermal requirements when substituting these alternatives.
