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Product Detailed Parameters
- Description：IC REG BUCK SEPIC ADJ 4.5A DDPAK
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4.3V
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.21V
- Voltage - Output (Max)：12.9V
- Current - Output：4.5A (Switch)
- 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 LT1959IR#TRPBF is a monolithic buck mode switching regulator from Analog Devices Inc., functionally identical to the LT1506 but optimized for lower output voltage applications. It operates as a positive adjustable DC-DC converter with a single output. Key electrical parameters include an input voltage range of 4V to 16V, a fixed switching frequency of 500kHz, and a maximum switch current capability of 4.5A. The output voltage is adjustable from 1.21V up to 2.42V. The device utilizes a TO-263-8 (D2PAK) package with thermal pad and supports operation up to a maximum junction temperature of 125°C.
Feature Summary
- Monolithic buck mode switching regulator architecture
- Optimized for low output voltage applications
- Functionally identical to the LT1506 series
Applications
- Low voltage point-of-load regulation
- Battery-powered systems requiring efficient step-down conversion
- Embedded power management circuits
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm that the D2PAK-7/TO-263-8 package variant matches your PCB footprint requirements. Ensure compatibility with the 4V minimum input voltage constraint for your system design. Cross-reference the manufacturer part number LT1959IR#TRPBF directly with official Analog Devices documentation to avoid counterfeit components.
Selection Notes
Select this component when a 4.5A synchronous buck regulator is needed for outputs below 2.5V. It serves as a direct functional replacement for the LT1506 in designs prioritizing lower voltage rails. Consider the 500kHz switching frequency for trade-offs between component size and efficiency. Verify thermal performance within the TO-263 package for your specific ambient conditions.
Part Context
This part belongs to the LT1959 family of switching regulators manufactured by Analog Devices Inc. It is categorized under PMIC - DC DC Switching Regulators. The device shares its core topology with the LT1506 but is tuned for different output voltage ranges. It is classified as an active product within the manufacturer's portfolio.
Replacement Considerations
The LT1506 is the primary functional equivalent. Verify pinout compatibility and thermal characteristics before substitution. Other members of the LT1959 family may offer different package options or slight parameter variations.
