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Product Detailed Parameters
- Description：IC REG BUCK 5V 750MA 10DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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 ~ 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-5#TRPBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It accepts an input voltage range of 4.2V to 42V and provides a fixed 5V output at up to 750mA. The device features an adjustable switching frequency from 195kHz to 2.15MHz, enabling optimization for efficiency or component size. Quiescent current consumption is specified at 2.5µA. It operates within a junction temperature range of -40°C to 125°C and utilizes a 10-WFDFN package with exposed pad.
Feature Summary
- Adjustable switching frequency allows trade-off between efficiency and passive component size
- Low quiescent current supports battery-powered applications
- Wide input voltage range accommodates various supply sources
Applications
- Automotive electronics systems
- Industrial control equipment
- Embedded microcontroller power supplies
- General-purpose DC-to-DC conversion
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging configuration distinct from tube variants. Confirm the fixed 5V output version matches system requirements. Ensure the DFN-10 package footprint aligns with PCB layout constraints. Cross-reference the manufacturer datasheet for thermal performance guidelines under expected load conditions.
Selection Notes
Select this part when a fixed 5V rail is required from a wide input range. Consider the adjustable frequency feature if minimizing inductor size is critical. Evaluate thermal dissipation capabilities given the small package. Compare against other LT3973 variants if different output voltages or packaging formats are needed.
Part Context
This component belongs to the LT3973 family of high-voltage step-down regulators. It shares core architecture with other variants like LT3973IDD-3.3 and LT3973HDD-5 but differs in output voltage setting and package handling. The series is designed for applications requiring robust operation across wide input ranges and varying thermal environments.
Replacement Considerations
LT3973IDD-5#PBF offers identical electrical specifications but uses tube packaging instead of tape and reel. LT3973HDD-5 variants provide alternative thermal performance characteristics. Verify pinout compatibility and thermal pad requirements when substituting.
