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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 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)：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-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x2)
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Overview
The LT3970IDDB-3.3#TRPBF is a monolithic buck switching regulator manufactured by Analog Devices Inc., housed in a DFN-10 surface-mount package. It delivers a fixed output voltage of 3.3 V with a maximum output current of 350 mA. The device accepts an input voltage range up to 40 V and features an adjustable switching frequency between 200 kHz and 2.2 MHz. Quiescent current consumption is specified at 2.5 uA, while the operating supply current is 1.8 uA. It operates within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates a power switch capable of delivering 350 mA output current
- Supports wide input voltage ranges up to 40 V
- Features low quiescent current consumption for battery efficiency
- Allows adjustable switching frequency from 200 kHz to 2.2 MHz
Applications
- Battery-powered portable equipment
- Industrial control systems
- Automotive electronics
- Communication infrastructure
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. Ensure the component meets RoHS compliance requirements for your assembly process. Check for restricted availability status as some distributors may list limited stock or special order conditions for this part number.
Selection Notes
Select this component when a fixed 3.3 V output is required without external feedback resistors. Choose the DFN-10 package for compact board space constraints. Consider the 350 mA current limit for loads exceeding 200 mA but below 1 A. Verify that the 40 V maximum input voltage aligns with the system's power source specifications.
Part Context
This part belongs to the LT3970 family of high-voltage step-down converters. It shares architectural similarities with other LT397x series devices but differs in output configuration and current capabilities. The IDDB suffix denotes the specific DFN-10 package type used for thermal management and footprint optimization in dense PCB layouts.
Replacement Considerations
LT3970IDDB-5#TRPBF provides a 5 V output instead of 3.3 V. LT3970IMS-3.3 offers the same voltage but in an MSOP package. Cross-reference pinouts and thermal pads before substitution.
