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Product Detailed Parameters
- Description：IC REG BUCK 5V 350MA 10DFN
- 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)：5V
- 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-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x2)
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Overview
The LT3970EDDB-5#TRMPBF is a monolithic buck switching regulator from Analog Devices, housed in an 8-pin DFN package. It delivers a fixed 5V output with a maximum current of 250mA. The device accepts an input voltage range from 4V to 40V and operates at a programmable switching frequency between 200kHz and 2.2MHz. Quiescent current is specified at 1.8µA, supporting extended battery life in portable applications.
Feature Summary
- Integrates power switch, catch diode, and boost diode into a compact footprint
- Combines Burst Mode operation with continuous conduction for low ripple
- Supports wide input voltage ranges up to 40V
- Enables use of miniature external components
Applications
- Battery-powered portable instrumentation
- Industrial control systems
- Automotive electronics
- Communication equipment
Procurement Notes
Verify the specific suffix #TRMPBF indicates tape-and-reel packaging with limited quantities. Confirm the E-grade temperature rating matches environmental requirements. Cross-reference the manufacturer's latest datasheet for RoHS compliance and material declarations before finalizing procurement orders.
Selection Notes
Select this component when a fixed 5V output is required without external feedback resistors. The integrated diodes simplify design compared to synchronous alternatives. Ensure the load current does not exceed 250mA. Verify that the 4V minimum input voltage aligns with the source supply characteristics.
Part Context
This part belongs to the LT3970 family of micropower step-down DC/DC converters. It shares architectural similarities with the LT3970IDDB variants but differs in package type (DFN vs MSOP) and thermal performance. The EDDB variant is optimized for space-constrained designs requiring high efficiency.
Replacement Considerations
LT3970IDDB-5#TRMPBF offers identical electrical specifications in a different package. LT3470 series devices provide similar functionality with lower current ratings. Verify pinout compatibility and thermal dissipation capabilities when substituting.
