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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 4.5A DDPAK-7
- 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)：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#PBF 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 provides a fixed 3.3V output at up to 4.5A. The device integrates a 4.5A power switch, oscillator, control logic, and synchronous rectification circuitry on a single die. Operating at a fixed frequency of 500kHz, it utilizes a DDPAK-8 (7+Tab) package for thermal management. This component is functionally identical to the LT1374 but optimized for lower input voltage applications.
Feature Summary
- Integrates a high-current 4.5A internal power switch with synchronous rectification for improved efficiency.
- Optimized for low input voltage operation, functioning reliably from 4V to 15V.
- Includes complete oscillator, control, and logic circuitry on a single monolithic die.
Applications
- Point-of-load regulation in distributed power systems
- Battery-powered equipment requiring efficient step-down conversion
- General-purpose DC-to-DC conversion for embedded electronics
Procurement Notes
Verify the specific suffix 'SYNC' confirms the inclusion of the internal synchronous rectifier switch rather than an external diode configuration. Ensure the '#PBF' designation indicates lead-free compliance and RoHS adherence as per manufacturer standards. Confirm the package type matches the required 8-pin DDPAK footprint with exposed tab for thermal dissipation during procurement validation.
Selection Notes
Select this component when input voltages fall between 4V and 15V and output currents reach up to 4.5A. The synchronous design offers higher efficiency compared to standard buck regulators using external Schottky diodes. Consider the 500kHz switching frequency for balancing component size against electromagnetic interference requirements in the target application environment.
Part Context
This part belongs to the LT1506 series of switching regulators, which are designed as cost-effective solutions for medium-current applications. It serves as a direct functional replacement for the LT1374 in designs where the input voltage does not exceed 15V. The series emphasizes simplicity and reliability by integrating all necessary control loops and protection features onto the silicon die.
Replacement Considerations
LT1374 is the primary documented equivalent, sharing identical functionality but supporting a wider input voltage range up to 25V. Verify that the system input voltage remains below 15V to ensure compatibility with the LT1506's optimized operating window.
