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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 750MA 10MSOP
- 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)：3.3V
- 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-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：10-MSOP-EP
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Overview
The LT3973HMSE-3.3#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc., designed for high-voltage applications with an input range up to 42V. It delivers a fixed 3.3V output at a maximum current of 0.75A. The device features an adjustable switching frequency ranging from 195kHz to 2.15MHz and operates within a junction temperature range of -40°C to 125°C. Packaged in a 10-wafer DFN (WDFN) with exposed pad, it consumes only 2.5µA of quiescent current.
Feature Summary
- Adjustable frequency operation allows optimization for efficiency or size
- Ultra-low quiescent current minimizes power consumption in standby modes
- Wide input voltage range supports direct connection to bus lines
Applications
- Automotive electronics systems
- Industrial control circuits
- Distributed power architectures
Procurement Notes
Verify the specific suffix 'HMSE' indicates the extended temperature grade and leaded package configuration when sourcing. Confirm that the '#PBF' designation ensures compliance with lead-free manufacturing standards. Cross-reference the manufacturer's latest datasheet to ensure the component meets current environmental regulations and RoHS requirements before finalizing procurement orders.
Selection Notes
Select this part when a wide input voltage range up to 42V is required alongside low static current consumption. The adjustable frequency feature enables designers to optimize the trade-off between external component size and electromagnetic interference. Ensure the thermal performance of the WDFN package aligns with the expected load conditions and ambient operating temperatures.
Part Context
This component belongs to the LT3973 family of high-voltage synchronous buck regulators. It shares core architectural similarities with other variants in the series but is distinguished by its specific output voltage setting and industrial-grade temperature rating. The family is designed for robust performance in demanding environments requiring efficient step-down conversion.
Replacement Considerations
Direct substitutes include other LT3973 variants such as LT3973EMSE-3.3#PBF or LT3973IMSE-3.3#PBF, depending on the required temperature grade and package type. Verify pin compatibility and thermal characteristics when considering alternative packages within the same functional family.
