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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 1.2A 8DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：7.5V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：1.2A
- Frequency - Switching：1MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-WFDFN Exposed Pad
- Supplier Device Package：8-DFN (2x3)
- Grade：-
- Qualification：-
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Overview
The LT3663EDCB-3.3 is a current mode step-down switching regulator from Analog Devices Inc., designed for automotive applications. It operates with an input voltage range of 7.5V to 36V and provides a fixed output voltage of 3.3V. The device supports a maximum output current of 1.2A using a buck topology. It features a programmable output current limit that accurately controls system power dissipation, allowing for reduced size of power path components. The component is housed in an 8-pin DFN EP package.
Feature Summary
- Current mode step-down switching regulator architecture
- Programmable output current limit for precise power control
- Automotive qualified reliability standard
Applications
- Automotive power distribution systems
- General DC-DC conversion requiring high input voltage tolerance
- Embedded systems needing regulated 3.3V supply from higher voltage rails
Procurement Notes
Verify the specific suffix EDCB-3.3 against the official Analog Devices datasheet to confirm the fixed 3.3V output and automotive grade classification. Ensure the 8-pin DFN EP package matches the design footprint requirements. Cross-reference the manufacturer part number LT3663EDCB-3.3#TRPBF or equivalent with authorized distributors to ensure authenticity and traceability before procurement.
Selection Notes
Select this component when a buck converter is required for automotive environments with input voltages up to 36V. The integrated programmable current limit simplifies thermal management by controlling power dissipation without external sensing complexity. It is suitable for designs where reducing the physical size of power path components is a priority due to the accurate current limiting feature.
Part Context
This part belongs to the LT3663 family of synchronous buck converters. Variants within the family differ primarily in output voltage (e.g., 2.5V, 5V) and package options. The 'E' designation typically indicates automotive grade qualification, while 'DCB' specifies the 8-pin DFN EP package. This specific model delivers a fixed 3.3V output optimized for automotive loads.
Replacement Considerations
Compatible substitutes include other LT3663 variants such as LT3663EDCB-5 or LT3663IDCB-3.3, provided the output voltage requirement aligns. Verify pin compatibility and thermal performance when substituting between different package types or temperature grades within the same family.
