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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 4.5A DDPAK-7
- 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)：4V
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：4.5A
- Frequency - Switching：500kHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Supplier Device Package：DDPAK-7
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Overview
The LT1506CR-3.3SYNC#TRPBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 15V and delivers a fixed 3.3V output at up to 4.5A. The device integrates a 4.5A power switch, oscillator, and control logic, functioning at a 500kHz frequency. It utilizes a DDPAK-7 (7+Tab) package for thermal efficiency.
Feature Summary
- Synchronous buck topology optimized for lower input voltage applications compared to the LT1374
- Integrated high-current internal switch eliminates external component requirements
- Fixed 3.3V output configuration simplifies design for standard logic levels
Applications
- 5V to 3.3V step-down conversion circuits
- Low input voltage DC-DC regulation systems
- General purpose synchronous buck converter designs
Procurement Notes
Verify the exact suffix against manufacturer documentation, as variations like SYNC or TRPBF may indicate specific packaging or pinout configurations. Confirm availability status, as some variants are marked as obsolete or limited supply. Ensure the DDPAK-7 package matches your PCB footprint requirements before ordering.
Selection Notes
Select this component when input voltages fall between 4V and 15V, distinguishing it from higher-voltage counterparts like the LT1374. The fixed 3.3V output removes the need for external feedback resistors. Consider the 4.5A current capability and 500kHz switching frequency for board space and thermal management constraints.
Part Context
This part belongs to the LT1506 family of synchronous regulators. It is functionally identical to the LT1374 but specifically optimized for lower input voltage ranges. The family provides integrated solutions for efficient DC-DC conversion without requiring external diodes or complex control circuitry.
Replacement Considerations
LT1506CR-SYNC#PBF: Non-tray packaged version with identical electrical specifications. LT1374: Higher input voltage range (5.5V to 25V), not suitable if input drops below 5.5V.
