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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 LT3663IDCB-3.3 is a current mode step-down switching regulator manufactured by Analog Devices Inc. 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 and features a programmable output current limit. Packaged in an 8-pin DFN EP surface-mount package, it utilizes a buck topology for efficient DC-to-DC conversion.
Feature Summary
- Current mode control architecture for stable regulation
- Programmable output current limit for system protection
- Compact 8-pin DFN EP surface-mount packaging
Applications
- 3.3V Step-Down Converter circuits
- Battery charger applications requiring current limiting
- Automotive power management systems
Procurement Notes
Verify the specific suffix IDCB-3.3 against official Analog Devices documentation to confirm the fixed 3.3V output configuration. Ensure the DFN-8 package type matches the design requirements. Cross-reference the manufacturer part number LT3663IDCB-3.3#TRPBF or similar variants to confirm availability status and RoHS compliance details before finalizing procurement orders.
Selection Notes
Select this component when a 3.3V output is required from a 7.5V to 36V input source. The integrated current limit allows for reduced power path component size compared to standard regulators. Consider the thermal performance of the DFN EP package for high-current applications up to 1.2A. Verify that the operating temperature range meets the environmental constraints of the target application.
Part Context
This part belongs to the LT3663 family of high-voltage buck converters. Variants such as LT3663IDCB-5 provide different fixed output voltages while maintaining identical electrical characteristics and packaging. The series is designed for applications needing robust current limiting and compact form factors in automotive and industrial environments.
Replacement Considerations
LT3663IDCB-5 offers a 5V output with identical input and current specifications. LT3663EDCB-5 provides a 2.5V output option. For MSOP packages, consider LT3663EMS8E-3.3. Verify pinout compatibility and thermal pad requirements when substituting between DFN and MSOP packages.
