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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 750MA 10MSOP
- 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)：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#TRPBF 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 0.75A, operating within a military temperature range of -55°C to 125°C. The device features adjustable switching frequencies from 195kHz to 2.15MHz and consumes only 2.5µA of quiescent current. Packaged in a 10-lead MSOP with exposed pad, it includes internal compensation and soft-start capabilities.
Feature Summary
- Supports wide input voltage ranges up to 42V for robust performance in automotive and industrial environments
- Features adjustable switching frequency to optimize efficiency and minimize external component size
- Incorporates low quiescent current consumption to enhance system power management during standby modes
Applications
- Automotive electronics requiring high-voltage tolerance and extended temperature stability
- Industrial control systems utilizing step-down conversion for logic or sensor power rails
- Embedded designs needing compact DC-DC regulation with flexible frequency selection
Procurement Notes
Verify the suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the HMSE grade meets military temperature specifications (-55°C to 125°C) for your application environment. Ensure compatibility with the Linduino software if using evaluation boards for design validation. Cross-reference the specific lot date code against project requirements.
Selection Notes
Select this variant for applications requiring fixed 3.3V output with military-grade thermal resilience. The adjustable frequency feature allows optimization for EMI constraints or transient response needs. Consider the 10-lead MSOP package for space-constrained PCB layouts. Verify input voltage stability does not exceed the 42V absolute maximum rating under all operating conditions.
Part Context
Part of the LT3973 family of high-voltage buck regulators, offering flexibility through adjustable frequency and multiple output options. Designed for demanding environments where reliability and wide input voltage tolerance are critical. Complements other Analog Devices PMIC solutions for complete power management systems.
Replacement Considerations
LT3973EMSE-3.3#TRPBF offers identical electrical characteristics but operates within the extended commercial temperature range (-40°C to 125°C). LT3973IMSE-3.3#TRPBF provides industrial temperature range (-40°C to 125°C). Verify thermal requirements before substituting, as the HMSE grade is required for military applications below -40°C.
