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Product Detailed Parameters
- Description：IC REG BUCK 5V 750MA 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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)：5V
- Voltage - Output (Max)：-
- Current - Output：750mA
- Frequency - Switching：195kHz ~ 2.15MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
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Overview
The LT3973HDD-5#PBF is a monolithic buck switching regulator from Analog Devices Inc., housed in a 10-pin DFN EP package. It accepts an input voltage range of 4.2V to 42V and provides a fixed 5V output at up to 750mA. The device features adjustable switching frequencies from 195kHz to 2.15MHz, enabling optimization for efficiency or component size. It operates with a quiescent current of 2.5µA and supports temperatures from -40°C to +150°C.
Feature Summary
- Adjustable frequency operation allows trade-offs between efficiency and passive component size
- Ultra-low quiescent current minimizes power consumption during standby conditions
- Wide input voltage range accommodates various supply sources including automotive loads
Applications
- Industrial control systems requiring robust voltage regulation
- Automotive electronics operating within wide voltage fluctuations
- Battery-powered devices needing extended operational life
Procurement Notes
Verify the specific suffix matches the required fixed output voltage and temperature grade. Confirm package type corresponds to the design footprint. Ensure compatibility with the intended switching frequency range for filter component selection. Cross-reference datasheet revisions for any pinout or electrical characteristic updates before finalizing procurement.
Selection Notes
Select this component when a fixed 5V output is required from high-voltage inputs up to 42V. Consider the adjustable frequency feature if minimizing inductor size is critical. Evaluate thermal performance given the 150°C maximum junction temperature rating. Compare against other buck regulators if synchronous rectification or different output configurations are needed.
Part Context
This part belongs to the LT3973 family of high-voltage step-down converters. It shares core architecture with variants offering different fixed output voltages or industrial temperature ranges. The H-grade designation typically indicates automotive qualification standards compared to standard industrial grades.
Replacement Considerations
LT3973IDD-5#PBF offers similar specifications but may differ in temperature range or automotive qualification status. Verify functional equivalence regarding pinout and electrical parameters before substitution.
