ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
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 ~ 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
Download product information
Overview
The LT3973EMSE-3.3#TRPBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc., designed for industrial and automotive applications. It accepts a wide input voltage range from 5.6V to 42V and delivers a fixed 3.3V output at up to 0.75A. The device features an adjustable switching frequency ranging from 195kHz to 2.15MHz and consumes only 2.5µA of quiescent current. It operates within a junction temperature range of -40°C to 125°C and utilizes a 10-wafer DFN package with an exposed pad.
Feature Summary
- Ultra-low quiescent current consumption of 2.5µA for extended battery life
- Wide input voltage range supporting up to 42V sources
- Adjustable switching frequency allows optimization for efficiency or component size
- Monolithic buck topology integrates power switch and control circuitry
Applications
- Industrial equipment power supplies
- Automotive electronics systems
- Point-of-load regulation modules
- Battery-powered instrumentation
Procurement Notes
Verify the suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the specific variant matches the required fixed output voltage and thermal performance for your enclosure. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability. Check for any recent product change notices regarding package or material updates.
Selection Notes
Select this component when a low standby current is critical alongside a high input voltage capability. The adjustable frequency feature permits trade-offs between inductor size and electromagnetic interference. Ensure the thermal design accommodates the 10-WFDFN package dissipation requirements under maximum load conditions. Verify that the fixed 3.3V output aligns with downstream logic levels without requiring additional adjustment resistors.
Part Context
This part belongs to the LT3973 family of high-voltage, low-quiescent-current buck regulators. It shares core architecture with variants offering different fixed outputs or adjustable settings. The EMSE designation specifies the MSOP-style package variant, while the IDD series offers a DFN option. All variants maintain the same electrical characteristics regarding input range and quiescent current.
Replacement Considerations
Direct substitutes include other LT3973 variants with compatible pinouts such as LT3973IDD#PBF for DFN packaging. Adjacent models like LT3971 offer similar functionality but with lower input voltage ratings and higher output currents. Verify thermal resistance and pin compatibility before swapping packages.
