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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3.5A 10MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：33V
- Voltage - Output (Min/Fixed)：0.79V
- Voltage - Output (Max)：30V
- Current - Output：3.5A
- Frequency - Switching：230kHz ~ 2.45MHz
- 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 LT3972EMSE#TRPBF is a high-efficiency, monolithic step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6 V to 33 V and delivers up to 3.5 A of output current. The device integrates a 2.45 MHz fixed-frequency PWM controller, allowing for the use of small external inductors and capacitors. It features a low quiescent current of 75 µA during operation and drops to 30 µA in shutdown mode. The output voltage is adjustable from 790 mV to 30 V. Packaged in a thermally enhanced 10-lead MSOP package, it supports junction temperatures up to 125°C.
Feature Summary
- Integrates a power switch and control circuitry for a compact buck converter solution
- Features a fixed 2.45 MHz switching frequency to minimize passive component size
- Includes internal soft-start and cycle-by-cycle current limiting for reliable startup
- Supports low quiescent current operation to extend battery life in portable applications
Applications
- Portable instrumentation and medical devices
- Industrial process control systems
- Battery-powered equipment requiring efficient step-down conversion
- Point-of-load regulation in embedded systems
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the EMSE variant meets the required temperature grade for your application environment. Cross-reference the manufacturer datasheet for exact pinout and thermal pad requirements. Ensure compatibility with your system's input voltage range and load current demands before finalizing procurement.
Selection Notes
Select this component when a single-output, high-current buck converter is needed within a 33 V input limit. The 2.45 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the MSOP-10 package constraints for thermal management if operating near maximum current. Verify that the adjustable output voltage range covers your specific rail requirements.
Part Context
This part belongs to the LT3972 family of high-efficiency synchronous buck regulators. It shares core architecture with other variants in the series but differs in package type and temperature rating. The EMSE designation specifies a commercial or extended temperature range MSOP package. It serves as a direct replacement for older discrete solutions or lower-performance regulators in space-constrained designs.
Replacement Considerations
Check for LT3972IDD#PBF or LT3972IMSE#TRPBF as potential electrical equivalents with different packages or temperature grades. Verify pin-to-pin compatibility if substituting directly on existing PCB layouts. Review updated datasheets for any changes in thermal performance or control loop characteristics.
