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Product Detailed Parameters
- Description：IC REG BUCK 5V 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)：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-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：10-MSOP-EP
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Overview
The LT3973EMSE-5#PBF is a monolithic buck switching regulator from Analog Devices Inc., designed for automotive and industrial applications. It features an adjustable frequency operation and accepts a wide input voltage range of 4.2V to 42V. The device provides a fixed 5V output with a maximum current capability of 0.75A. It consumes only 2.5uA of quiescent current, ensuring high efficiency in low-power states. The component operates within a temperature range of -40°C to +125°C and is housed in a compact MSOP-10 package.
Feature Summary
- Adjustable frequency monolithic buck topology
- Ultra-low 2.5uA quiescent current consumption
- Wide 4.2V to 42V input voltage range
- Integrated shutdown control functionality
Applications
- Automotive electronics power systems
- Industrial equipment DC-DC conversion
- Battery-powered system regulation
- General-purpose step-down voltage regulation
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and tube packaging when sourcing. Confirm the EMSE variant corresponds to the standard operating specifications rather than the H or I grade variants which may differ in input range or frequency characteristics. Ensure compatibility with MSOP-10 footprint requirements during procurement planning.
Selection Notes
Select this part for designs requiring wide input voltage tolerance up to 42V with minimal standby power draw. The fixed 5V output suits logic supply rails where 750mA load capacity is sufficient. Consider the adjustable frequency feature for EMI optimization against other system components. Verify thermal management needs for the MSOP-10 package under continuous load conditions.
Part Context
This component belongs to the LT3973 family of high-efficiency buck regulators. The EMSE designation specifies the commercial/automotive grade variant with the MSOP-10 package. The #PBF suffix denotes RoHS-compliant manufacturing. It serves as a compact solution for stepping down higher bus voltages to stable 5V levels in space-constrained environments.
Replacement Considerations
Direct substitutes include LT3973IMSE-5#PBF and LT3973HMSE-5#PBF. Check datasheets for differences in input voltage minimums and switching frequency ranges between these grades before swapping.
