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Product Detailed Parameters
- Description：IC REG BUCK ADJ 750MA 10DFN
- 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)：4.2V
- Voltage - Input (Max)：42V
- Voltage - Output (Min/Fixed)：1.21V
- Voltage - Output (Max)：24V
- Current - Output：750mA
- Frequency - Switching：195kHz ~ 2.15MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
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Overview
The LT3973IDD#TRPBF is a monolithic buck switching regulator from Analog Devices Inc., housed in a 10-WFDFN package with an exposed pad. It operates as a positive adjustable output DC-DC converter, supporting a maximum output voltage of 24V and delivering up to 750mA of continuous current. The device accepts a wide input voltage range, typically spanning from 4.2V to 42V, and features an adjustable switching frequency ranging from 195kHz to 2.15MHz. It maintains a low quiescent current of approximately 2.5µA and functions within a junction temperature range of -40°C to 125°C.
Feature Summary
- Adjustable frequency operation allows optimization for efficiency or component size
- Wide input voltage range supports diverse power supply architectures
- Low quiescent current enhances battery life in portable applications
- Integrated synchronous rectification improves conversion efficiency
Applications
- Battery-powered portable equipment requiring efficient step-down regulation
- Automotive systems operating under varying input voltage conditions
- Industrial control systems needing reliable DC-DC conversion
- Embedded systems with strict space constraints due to compact packaging
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the IDD variant meets industrial temperature requirements (-40°C to 125°C). Ensure compatibility with the target input voltage range (up to 42V) and output current needs (750mA). Check for RoHS compliance status if required by your manufacturing standards. Validate that the 10-WFDFN footprint matches your PCB layout design.
Selection Notes
Select this component when a wide input voltage range up to 42V is required alongside high efficiency. The adjustable frequency feature is critical for optimizing external component selection based on size or noise constraints. Consider the 750mA output capability against your load requirements. The exposed pad thermal design must be addressed in the PCB layout to ensure proper heat dissipation within the specified temperature range.
Part Context
This part belongs to the LT3973 family of high-efficiency, wide-input voltage buck regulators. It shares core architecture with other variants like LT3973HDD but differs in temperature rating and packaging. The IDD suffix denotes the industrial temperature grade and DFN package type. This series is designed for applications demanding high performance in a small form factor.
Replacement Considerations
Direct substitutes include other LT3973 variants such as LT3973HDD#TRPBF, noting differences in temperature range. Cross-reference with similar Analog Devices buck regulators offering comparable input voltage and current capabilities. Verify pinout compatibility and thermal performance before substitution.
