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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 350MA 10MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4.2V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：350mA
- Frequency - Switching：200kHz ~ 2.25MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：10-MSOP
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Overview
The LT3970HMS-3.3#TRPBF is a synchronous buck switching regulator from Analog Devices, housed in a 10-lead MSOP package with an exposed pad. It accepts input voltages from 6V to 40V and provides a fixed 3.3V output at up to 350mA. The device features adjustable switching frequencies between 200kHz and 2.25MHz and consumes only 2.5µA of quiescent current. It operates within a temperature range of -40°C to 125°C TJ.
Feature Summary
- Synchronous rectification for high efficiency across load ranges
- Adjustable switching frequency allows optimization for size or noise
- Ultra-low quiescent current minimizes power loss in standby modes
Applications
- Industrial control systems requiring wide input voltage tolerance
- Distributed power architectures in embedded equipment
- Battery-powered devices needing extended operational life
Procurement Notes
Verify the suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the H-grade designation meets specific reliability requirements for your environment. Cross-reference the exact part number with official Analog Devices documentation to ensure compatibility with your design specifications before procurement.
Selection Notes
Select this component when a fixed 3.3V output is required without external feedback resistors. The synchronous topology is preferred over non-synchronous versions for improved efficiency at moderate loads. Ensure the chosen switching frequency aligns with electromagnetic interference constraints and inductor availability.
Part Context
This part belongs to the LT3970 family of monolithic buck regulators designed for high-performance applications. The HMS variant specifically denotes a synchronous version in a compact MSOP package. It shares core architecture with other LT3970 models but differs in output configuration and thermal handling capabilities.
Replacement Considerations
LT3970HMS-3.3#PBF serves as the tube-packaged equivalent. LT3970IMS#PBF offers an adjustable output version in the same package. Verify pinout compatibility and thermal performance when substituting with non-synchronous variants like the LT3970IDDB.
