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Product Detailed Parameters
- Description：IC REG BUCK 5V 1.2A 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)：4.3V
- Voltage - Input (Max)：38V
- 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
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Overview
The LT3971IMSE-5#TRPBF is a monolithic buck switching regulator from Analog Devices, designed for high-efficiency power conversion. It operates with an input voltage range of 4.3V to 38V and delivers up to 1.2A output current. The device features a fixed 5V output and supports adjustable switching frequencies up to 2MHz. Key electrical characteristics include a typical quiescent current of 2.2µA in Burst Mode operation and a shutdown supply current of 700nA. It is housed in a 10-lead MSOP package with an exposed thermal pad, suitable for space-constrained applications requiring low noise and wide input voltage tolerance.
Feature Summary
- Ultra-low quiescent current design maintains high efficiency at light loads while keeping output ripple below 15mV.
- Internally compensated current mode topology ensures fast transient response and stable loop performance.
- Integrated accurate 1V threshold enable pin allows precise shutdown control with minimal standby current consumption.
- Power good flag provides reliable system status indication when the output voltage reaches regulation.
Applications
- USB-powered portable devices requiring strict quiescent current limits
- Battery-operated equipment needing extended runtime through efficient light-load management
- Industrial systems utilizing wide input voltage ranges up to 38V
- Space-constrained embedded designs benefiting from compact MSOP packaging
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging configuration. Confirm the IMSE variant meets industrial temperature specifications (-40°C to +125°C). Ensure compatibility with 10-MSOP footprint requirements including exposed pad thermal management. Check for RoHS compliance documentation if required by target market regulations.
Selection Notes
Choose this component when fixed 5V output is required alongside wide input voltage capability. Select for applications prioritizing ultra-low no-load current over programmable output flexibility. Consider the internal compensation for simplified external component selection. Evaluate thermal performance needs given the single-output topology and package constraints.
Part Context
This part belongs to the LT3971A family of step-down regulators, offering improved reference accuracy compared to earlier LT3971 versions. The -5 suffix denotes a fixed 5V output version, distinct from adjustable variants. It shares core architecture with other members but specifies VOUT pin current characteristics relevant for USB interfaces.
Replacement Considerations
LT3971IMSE-5#PBF offers identical electrical specifications in tube packaging instead of reel. LT3971EMSE-5#TRPBF provides commercial grade temperature range alternative. Verify pinout compatibility before substitution as package dimensions remain consistent across these variants.
