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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4.5A DDPAK-7
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4V
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：2.42V
- Voltage - Output (Max)：13.95V
- Current - Output：4.5A
- Frequency - Switching：500kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°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 LT1506IR#TRPBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4V to 15V and delivers a fixed output voltage of 3.3V at up to 4.5A. The device integrates a 4.5A power switch, oscillator, and control logic within a D2PAK-8 package. It functions at a fixed 500kHz switching frequency and includes features such as adjustable soft start and cycle-by-cycle current limiting for robust performance in low-voltage applications.
Feature Summary
- Integrates a high-current 4.5A synchronous power switch for efficient step-down conversion
- Optimized for lower input voltage applications compared to similar legacy regulators
- Includes adjustable soft-start capability to limit inrush current during startup
- Features built-in cycle-by-cycle current limiting for enhanced protection
Applications
- Point-of-load regulation for microprocessors and DSPs
- Battery-powered equipment requiring efficient voltage stepping
- Industrial control systems with 4V to 15V supply rails
- Communication infrastructure power distribution
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging with lead-free (Pb-free) compliance. Confirm the IR suffix corresponds to the industrial temperature range (-40°C to +85°C). Ensure the D2PAK-8 footprint matches your PCB design constraints. Cross-reference the manufacturer's latest datasheet for any pinout or thermal pad modifications.
Selection Notes
Select this component when a fixed 3.3V output is required from a 4V to 15V input source. It is suitable for designs needing up to 4.5A load current without external pass transistors. Consider the 500kHz frequency for balancing component size and efficiency. Verify that the thermal dissipation capabilities of the D2PAK package meet the system's power loss requirements under maximum load conditions.
Part Context
The LT1506 series serves as a drop-in replacement for older non-synchronous buck regulators like the LT1374, but with improved efficiency due to synchronous rectification. It is specifically optimized for lower input voltage ranges (4V-15V) compared to the LT1374's 5.5V-25V range. This places it in the category of medium-power DC-DC converters for general-purpose power management.
Replacement Considerations
The LT1506IR#TRPBF is functionally identical to the LT1374 but optimized for lower input voltages. Direct substitutes may include other 4.5A synchronous buck regulators from Analog Devices or competitors, provided they support the 4V-15V input range and 3.3V fixed output. Verify pin compatibility and thermal performance before substitution.
