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Product Detailed Parameters
- Description：IC REG BUCK ADJ 750MA 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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 LT3973EDD#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4.2V to 42V and delivers up to 750mA output current. The device features adjustable switching frequencies from 195kHz to 2.15MHz, enabling optimization for efficiency or size. It maintains a low quiescent current of 2.5µA and includes under-voltage lockout protection. The component is housed in a 10-DFN package and supports operation temperatures from -40°C to +125°C.
Feature Summary
- Adjustable switching frequency allows design flexibility between efficiency and component size
- Low quiescent current consumption enhances battery life in portable applications
- Integrated under-voltage lockout ensures stable startup and shutdown behavior
Applications
- Industrial control systems requiring wide input voltage tolerance
- Automotive electronics operating within standard vehicle power rails
- Portable instrumentation powered by single-cell lithium batteries
Procurement Notes
Verify the specific suffix matches the required thermal pad configuration and lead finish. Confirm that the DFN-10 package dimensions align with your PCB footprint requirements. Ensure the ordering part number corresponds to the exact input/output specifications needed for your circuit design before finalizing procurement.
Selection Notes
Select this component when a wide input voltage range up to 42V is required alongside moderate output current capabilities. The adjustable frequency feature is critical for optimizing external inductor and capacitor sizes. Consider the thermal performance of the exposed pad DFN package for high-duty cycle applications.
Part Context
This part belongs to the LT3973 family of synchronous buck regulators designed for industrial and automotive environments. It shares core architecture with variants like LT3973IDD but differs in temperature rating and packaging options. The EDD suffix typically denotes extended industrial temperature ranges compared to commercial grade alternatives.
Replacement Considerations
LT3973IDD#PBF offers similar electrical characteristics but may differ in temperature range or packaging details. Verify pin compatibility and thermal resistance values before substitution. Other families require full re-evaluation of loop compensation and external component selection.
