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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 750MA 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4.2V
- Voltage - Input (Max)：42V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- 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-3.3#TRPBF is a monolithic buck switching regulator from Analog Devices Inc., designed for industrial applications. It features an adjustable frequency range and accepts a wide input voltage up to 42V. The device delivers a fixed 3.3V output with a maximum current of 0.75A. It operates with a low quiescent current of 2.5uA. The component is housed in a 10-wafer DFN package with an exposed pad, suitable for surface mount installation.
Feature Summary
- Adjustable frequency operation for optimized efficiency
- Wide input voltage range supporting high-voltage systems
- Ultra-low quiescent current for battery conservation
- Integrated synchronous rectification topology
Applications
- Industrial control systems
- Automotive electronics
- Portable instrumentation
- Embedded computing platforms
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the EDD grade corresponds to the required industrial temperature range specifications. Ensure compatibility with the target PCB footprint for the 10-WFDFN package. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or thermal guidelines before finalizing procurement orders.
Selection Notes
Select this part when a fixed 3.3V rail is required with minimal external component count. The adjustable frequency feature allows designers to optimize for size or noise performance. Verify that the load current does not exceed 0.75A. Consider the thermal dissipation capabilities of the exposed pad design for high-duty cycle applications within the specified temperature limits.
Part Context
This component belongs to the LT3973 family of step-down regulators. Variants such as LT3973IDD and LT3973HDD offer similar electrical characteristics but may differ in automotive qualification or specific output voltage options. The EDD designation typically aligns with industrial-grade performance standards, distinguishing it from commercial or extended automotive grades within the same product line.
Replacement Considerations
LT3973IDD#PBF and LT3973HDD#PBF are related variants within the same family. Verify if the specific suffix changes the packaging type or temperature rating. Direct pin-to-pin substitution requires confirming that the alternative part meets the exact voltage and current requirements of the original design.
