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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 350MA 10MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 ~ 125°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 LT3970EMS-3.3#TRPBF is a monolithic buck switching regulator from Analog Devices Inc., designed for high-efficiency DC-to-DC conversion. It accepts a wide input voltage range up to 40V and delivers a fixed output of 3.3V at 350mA. The device features an adjustable switching frequency ranging from 200kHz to 2MHz, allowing optimization for size or efficiency. Quiescent current consumption is extremely low at 2.5µA, supporting battery-powered applications. It operates within a temperature range of -40°C to 125°C TJ and utilizes a 10-MSOP package with exposed pad.
Feature Summary
- Adjustable switching frequency capability for design flexibility
- Ultra-low quiescent current consumption for extended battery life
- Wide input voltage range acceptance up to 40V
- Integrated synchronous rectification for high efficiency
Applications
- Battery-powered portable electronics
- Industrial control systems requiring wide input ranges
- Automotive infotainment and sensor interfaces
- Communication equipment power supplies
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when placing orders. Confirm the exact operating temperature grade and package variant matches the design requirements. Check for any recent product change notices regarding material composition or pinout modifications. Ensure compatibility with existing PCB footprints before finalizing procurement decisions.
Selection Notes
Select this component when a fixed 3.3V output is required alongside wide input voltage tolerance. Consider the adjustable frequency feature if minimizing external inductor size is a priority. Evaluate the 350mA output current limit against peak load demands. Compare thermal performance in the MSOP package against alternative packages like DFN if space constraints differ significantly.
Part Context
This part belongs to the LT3970 family of synchronous step-down converters. It shares core architecture with variants offering different output voltages or adjustable outputs. The EMS-3.3 designation specifies the fixed 3.3V output version in the MSOP package. It complements other LT3970 models like IDDB or IMS variants which offer different package options or output configurations.
Replacement Considerations
LT3970IDDB-3.3#TRMPBF offers identical electrical performance in a DFN-10 package. LT3970IMS-3.3#TRPBF provides the same functionality in a standard MSOP package without the exposed pad. Verify footprint compatibility when substituting between MSOP and DFN packages. Ensure thermal dissipation requirements are met with the alternative package type.
