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Product Detailed Parameters
- Description：IC REG BUCK 5V 350MA 16MSOP
- 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)：62V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：350mA
- Frequency - Switching：210kHz ~ 2.3MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：16-MSOP-EP
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Overview
The LT3990HMSE-5#TRPBF is a monolithic buck switching regulator from Analog Devices Inc., housed in a 16-MSOP package with an exposed pad. It provides a fixed 5V output at up to 350mA. The device accepts input voltages from 4V to 62V and operates with a typical quiescent current of 2.5µA. It features an adjustable switching frequency ranging from 210kHz to 2.3MHz. The component supports operation across a temperature range of -40°C to +125°C and includes shutdown functionality for power management.
Feature Summary
- Fixed 5V output voltage configuration
- Wide 62V input voltage tolerance
- Adjustable switching frequency capability
- Low quiescent current consumption
Applications
- Industrial control systems
- Automotive electronics
- Battery-powered equipment
- Telecommunications infrastructure
Procurement Notes
Verify the suffix #TRPBF indicates tape-and-reel packaging, distinct from tube variants like #PBF. Confirm the MSOP-16 package type matches board layout requirements. Ensure the fixed 5V output aligns with design needs, as other suffixes offer different voltages or adjustable outputs. Check RoHS compliance status on the official datasheet before finalizing procurement orders.
Selection Notes
Select this part when a fixed 5V rail is required from high-voltage inputs up to 62V. The 350mA limit suits low-to-medium power loads. Consider the adjustable frequency feature for EMI optimization. Compare against adjustable versions if flexible output is needed. Verify thermal performance in the target enclosure due to the small package size.
Part Context
This component belongs to the LT3990 family of high-voltage buck regulators. It shares core architecture with variants like LT3990EMSE (adjustable) and LT3990IMSE (different voltage options). The HMSE-5 designation specifically denotes the 5V fixed output version. All variants utilize the same 16-MSOP footprint and pinout for interchangeability in mechanical design.
Replacement Considerations
LT3990HMSE-5#PBF offers identical electrical specifications but uses tube packaging instead of tape-and-reel. LT3990EMSE#TRPBF provides an adjustable output voltage range instead of fixed 5V. LT3990IMSE-5#TRPBF may share similar characteristics but requires verification of specific output voltage tolerances against the HMSE-5 datasheet.
