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Product Detailed Parameters
- Description：IC REG BUCK 5V 1.2A 10MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：4.3V
- Voltage - Input (Max)：55V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：1.2A
- Frequency - Switching：200kHz ~ 2MHz
- 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
- Grade：-
- Qualification：-
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Overview
The LT3991EMSE-5#TRPBF is a monolithic step-down DC/DC switching regulator from Analog Devices. It operates with an input voltage range of 4.3V to 55V and delivers a fixed 5V output at up to 1.2A. The device features a low quiescent current of 2.8µA and supports adjustable switching frequencies up to 2MHz. Packaged in a 10-lead MSOP with exposed pad, it functions within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates a high-voltage buck converter capable of handling inputs up to 55V
- Provides a fixed 5V regulated output with 1.2A continuous current capability
- Features ultra-low quiescent current for efficient battery-powered operation
- Includes internal compensation and frequency synchronization capabilities
Applications
- Industrial control systems requiring wide input voltage ranges
- Automotive electronics operating under varying supply conditions
- Battery-powered equipment needing extended runtime efficiency
- Point-of-load regulation in distributed power architectures
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the fixed 5V output variant matches the design requirements, as other voltage options exist within the LT3991 family. Ensure compatibility with the intended thermal management solution given the MSOP package constraints.
Selection Notes
Select this component when a fixed 5V output is required alongside high input voltage tolerance. Consider the 2.8µA quiescent current for standby applications. Evaluate the need for external frequency setting if synchronization is necessary. Compare against adjustable variants if flexible output voltages are preferred over the fixed configuration.
Part Context
This part belongs to the LT3991 series of high-voltage step-down regulators. It shares core architecture with other variants like the LT3991EMSE-3.3#PBF but differs in its fixed output voltage specification. The series is designed for applications demanding high efficiency and low noise in compact form factors.
Replacement Considerations
LT3991EMSE-5#PBF is the tube-packaged equivalent of this reel-part. Other LT3991 variants offer different fixed outputs or adjustable settings. Verify pinout and thermal performance before substituting with non-Analog Devices alternatives.
