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Product Detailed Parameters
- Description：IC REG BUCK 5V 350MA 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)：40V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：350mA
- Frequency - Switching：200kHz ~ 2.25MHz
- 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)
- Supplier Device Package：10-MSOP
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Overview
The LT3970IMS-5#PBF is a monolithic buck switching regulator from Analog Devices, housed in a 10-lead MSOP package. It provides a fixed 5V output with a maximum current of 350mA. The device accepts an input voltage range of 4.2V to 40V and supports adjustable switching frequencies between 200kHz and 2.2MHz. Quiescent current is specified at 1.8µA during operation and 1.7µA in shutdown mode. It operates within a temperature range of -40°C to +125°C.
Feature Summary
- Integrated high-voltage N-channel switch for simplified design
- Adjustable switching frequency allows optimization for size or efficiency
- Low quiescent current consumption extends battery life
- Internal compensation reduces external component count
Applications
- Battery-powered portable equipment
- Industrial control systems
- Automotive electronics
- Communication infrastructure
Procurement Notes
Verify the specific suffix '#PBF' confirms lead-free RoHS compliance as per manufacturer standards. Confirm the 'IMS' designation matches the required MSOP-10 package variant. Check current availability status as supply may be limited. Ensure the fixed 5V output aligns with system requirements, as other variants offer adjustable or different fixed voltages.
Selection Notes
Select this part when a fixed 5V rail is required from a wide input range up to 40V. The 350mA output current suits low-power applications. Choose based on the need for a compact MSOP-10 footprint. Consider the 200kHz to 2.2MHz frequency range for balancing inductor size against transient response needs.
Part Context
This component belongs to the LT3970 family of high-voltage step-down converters. It shares core architecture with variants like LT3970IMS#PBF (adjustable) and LT3970EMS-5#PBF (extended temp). The IMS-5 variant specifically fixes the output voltage at 5V, distinguishing it from the programmable versions while maintaining identical electrical characteristics and packaging.
Replacement Considerations
LT3970IMS#PBF offers adjustable output instead of fixed 5V. LT3970EMS-5#PBF provides the same 5V output but with extended industrial temperature rating. Verify pinout compatibility and thermal performance when substituting.
