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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.5A 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：60V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：55.2V
- Current - Output：1.5A (Switch)
- Frequency - Switching：500kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-TSSOP-EP
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Overview
The LT1977IFE#TRPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc., designed for high-efficiency power conversion in compact applications. It operates with an input voltage range from 3V to 60V and provides an adjustable output voltage between 1.25V and 55.2V. The device delivers a continuous switch current of 1.5A at a fixed switching frequency of 500kHz. Packaged in a 16-lead TSSOP with an exposed thermal pad, it supports junction temperatures from -40°C to 125°C.
Feature Summary
- Integrated synchronous rectification architecture eliminates the need for external Schottky diodes to improve efficiency.
- Fixed 500kHz switching frequency enables the use of small passive components for space-constrained designs.
- Wide 3V to 60V input voltage range accommodates various supply sources including single-cell Li-ion batteries.
- Built-in cycle-by-cycle current limiting protects against short circuits and overload conditions.
Applications
- Point-of-load regulation for industrial equipment
- Power distribution systems in automotive electronics
- Battery-powered portable devices requiring efficient step-down conversion
Procurement Notes
Verify the complete part number LT1977IFE#TRPBF matches the required suffixes for tape-and-reel packaging and lead-free compliance. Confirm that the 16-TSSOP package dimensions align with your PCB footprint requirements. Ensure the supplier provides valid RoHS3 certification documentation consistent with Analog Devices specifications before finalizing procurement orders.
Selection Notes
Select this component when a wide input voltage range up to 60V is required alongside moderate output current capabilities. The integrated synchronous design reduces external component count compared to non-synchronous alternatives. Consider the thermal performance of the exposed pad package for high-duty cycle applications where heat dissipation is critical for maintaining reliability within the specified temperature range.
Part Context
This part belongs to the LT1977 family of high-voltage synchronous buck regulators. It shares functional similarities with other members like the LT1977IS but differs in package type and pinout configuration. The family targets applications needing robust performance across broad input voltage variations without sacrificing efficiency or board space.
Replacement Considerations
LT1977IS#TRPBF offers identical electrical performance in a 16-SOIC package instead of TSSOP. Verify pin compatibility and thermal management strategies when substituting due to the different physical footprint and mounting requirements of the alternative package style.
