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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：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 LT1959CR#TRPBF is a high-performance switching regulator IC manufactured by Analog Devices Inc. It functions as a buck or SEPIC converter with an adjustable output voltage starting from 1.21V. The device supports a maximum switch current of 4.5A and operates at a fixed switching frequency of 500kHz. It is housed in a TO-263-8 (D2PAK) surface-mount package, providing robust power handling capabilities for industrial applications requiring efficient DC-DC conversion.
Feature Summary
- Supports both buck and SEPIC topologies for flexible input-output voltage configurations
- High current capability with 4.5A switch rating for demanding load requirements
- Fixed 500kHz switching frequency enables the use of compact passive components
Applications
- Industrial distributed power systems
- Point-of-load regulation modules
- Battery-powered equipment requiring efficient step-down conversion
Procurement Notes
Verify the specific suffix #TRPBF to confirm tape-and-reel packaging configuration. Ensure compatibility with TO-263-8 footprint thermal management requirements. Cross-reference official datasheets for absolute maximum ratings and operating temperature ranges before integration into final designs.
Selection Notes
Select this component when a single IC must support both buck and SEPIC operations. The 4.5A current rating suits applications needing substantial output power without external passives. Consider the D2PAK package for its thermal dissipation advantages over smaller footprints in high-current scenarios.
Part Context
This part belongs to the LT1959 family of switching regulators designed for efficiency and simplicity. It integrates the power switch and control logic into a single package, reducing board space compared to discrete solutions. The series targets applications where reliability and performance are critical under varying load conditions.
Replacement Considerations
Consult official substitution guides for equivalent parts with matching current ratings and package types. Verify pinout compatibility and electrical specifications before replacing existing designs.
