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Product Detailed Parameters
- Description：IC REG BUCK SEPIC ADJ 4.5A DDPAK
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：5V
- Voltage - Input (Max)：32V
- Voltage - Output (Min/Fixed)：2.42V
- Voltage - Output (Max)：27.52V
- 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 LT1374HVCR#PBF is a monolithic high voltage step-down switching regulator manufactured by Analog Devices Inc. It operates with a constant 500kHz switching frequency and supports an input voltage range from 5V to 32V. The device delivers up to 4.5A of output current in a Buck topology. It features current-mode control for rapid line and load transient response. The component is housed in a 7-pin DDPAK surface-mount package and includes thermal shutdown protection.
Feature Summary
- High voltage operation capability supporting inputs up to 32V
- Integrated 4.5A power switch for high current density applications
- Constant 500kHz fixed switching frequency reduces external component size
- Current-mode control architecture ensures stable loop performance
Applications
- Industrial point-of-load regulation
- Distributed power supply systems
- Battery-powered equipment requiring high efficiency
- Telecommunications infrastructure power management
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliant packaging when sourcing. Confirm the HV variant designation matches the required 32V input specification rather than standard versions. Ensure the DDPAK-7 footprint aligns with the target PCB layout constraints. Cross-reference the manufacturer's latest datasheet revision for any pinout or thermal pad modifications before finalizing procurement orders.
Selection Notes
Select this component when input voltages exceed standard regulator limits but remain below 32V. The fixed 500kHz frequency offers a balance between efficiency and passive component size. Consider the thermal performance of the DDPAK package for high ambient temperature environments. Verify that the required output current does not exceed the internal switch rating under worst-case operating conditions.
Part Context
This part belongs to the LT1374 family of high voltage switching regulators designed for demanding industrial applications. The HV variant specifically extends the input voltage range compared to standard models. It utilizes Linear Technology's proprietary high-speed current mode control architecture. The family is known for robust performance in noisy electrical environments.
Replacement Considerations
LT1374CR#PBF serves as a lower voltage alternative if input requirements are within 25V. LT1374IFE#TRPBF provides the same functionality in a TSSOP package for space-constrained designs. Verify pin compatibility and thermal characteristics when substituting these variants.
