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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 1.2A 10MSOP
- 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)：3.3V
- 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-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：10-MSOP-EP
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Overview
The LT3971IMSE-3.3#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc., housed in a 10-lead MSOP package with an exposed thermal pad. It delivers a fixed 3.3V output at up to 1.2A from an input voltage range of 4.3V to 38V. The device operates with a typical quiescent current of 2.8µA and supports adjustable switching frequencies up to 2MHz. It features Burst Mode operation for high efficiency at light loads, maintaining low output ripple.
Feature Summary
- Synchronous buck topology with integrated high-efficiency power switch
- Ultra-low quiescent current design for extended battery life
- Burst Mode operation maintains high efficiency at low output currents
- Internally compensated current mode control for fast transient response
Applications
- Automotive electronics requiring wide input voltage tolerance
- Industrial systems with 24V or 48V bus architectures
- Portable equipment powered by single-cell lithium-ion batteries
- Embedded controllers needing stable 3.3V logic supply
Procurement Notes
Verify the specific suffix #PBF indicates lead-free RoHS compliance when ordering. Confirm the MSOP-10 package variant matches your PCB footprint requirements. Ensure the fixed 3.3V output version aligns with your system voltage needs, as adjustable variants exist within the same family. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.
Selection Notes
Select this component when a fixed 3.3V output is required without external feedback resistors. Choose the MSOP-10 package for compact surface-mount designs where thermal performance via the exposed pad is critical. Consider the 2MHz frequency option if smaller passive components are desired, balancing EMI considerations against size constraints.
Part Context
This part belongs to the LT3971 family of high-voltage synchronous buck regulators designed for automotive and industrial applications. It shares core architecture with the LT3971A series but offers specific electrical characteristics tailored for general-purpose power management. The IMSE designation identifies the MSOP package variant within the broader product line.
Replacement Considerations
LT3971EDD-3.3#PBF offers identical electrical specifications in a DFN package. LT3971EMSE-3.3#PBF provides the same functionality in an alternative MSOP variant. Verify pinout compatibility and thermal pad dimensions before substituting packages.
