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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)：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 LT3971EMSE-5#TRPBF is a monolithic buck switching regulator from Analog Devices, designed for high-efficiency step-down conversion. It accepts an input voltage range of 4.3V to 38V and delivers up to 1.2A of output current. The device features a fixed 5V output and operates with a switch frequency adjustable between 200kHz and 2MHz. It maintains a low quiescent current of 2.8µA during regulation and reduces to 700nA in shutdown mode. Packaged in a 10-lead MSOP with an exposed thermal pad, it supports operation from -40°C to +125°C junction temperature.
Feature Summary
- Integrates a high-efficiency 0.33Ω power switch and boost Schottky diode within the die
- Utilizes internally compensated current-mode topology for fast transient response and loop stability
- Features Burst Mode operation to maintain high efficiency at light loads while minimizing output ripple
- Includes precise enable threshold and power good flag for system management
Applications
- Industrial control systems requiring wide input voltage ranges
- Battery-powered equipment needing extended runtime through low quiescent current
- Embedded systems utilizing USB or standard logic interfaces
- Point-of-load regulation in compact space-constrained designs
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the fixed 5V output variant matches the target circuit requirements, as other output voltages are available in the same package. Ensure compatibility with the required operating temperature range and check for any recent manufacturing changes documented in product change notices.
Selection Notes
Select this component when a fixed 5V output is required alongside a wide input voltage capability up to 38V. The adjustable frequency feature allows optimization for size versus efficiency trade-offs. Consider the 10-MSOP package for applications where board space is limited but thermal dissipation via the exposed pad is necessary. Verify that the 1.2A current rating meets the peak load demands of the application.
Part Context
This part belongs to the LT3971 family of ultra-low quiescent current buck regulators. It shares architectural similarities with the LT3971A and LT3973 series but offers specific electrical characteristics tailored for general-purpose step-down applications. The device integrates essential control logic, oscillator, and protection circuits into a single compact solution.
Replacement Considerations
LT3971EMSE-5#PBF is the tube-packaged equivalent of this component. For adjustable output versions, consider LT3971IMSE#PBF. Cross-reference with LT3971A variants if enhanced reference accuracy is required, though functional pinouts remain consistent across the family.
