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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.5A 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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：0°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 LT1977EFE#PBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3V to 60V and provides an adjustable output from 1.25V to 55.2V. The device delivers a 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 high-voltage power switch capable of handling up to 60V input
- Fixed internal switching frequency for simplified external component selection
- Thermal regulation circuitry to limit die temperature during overload conditions
- Current mode control architecture for fast transient response
Applications
- Industrial point-of-load regulation
- Battery-powered systems requiring wide input ranges
- Distributed power architectures
- Automotive electronics subsystems
Procurement Notes
Verify the specific suffix PBF confirms lead-free and RoHS compliance status before integration. Confirm the 16-TSSOP package variant matches your PCB footprint requirements. Check manufacturer notices for any recent design changes or lifecycle updates that may affect long-term availability.
Selection Notes
Select this component when a non-synchronous buck converter is required for inputs exceeding standard low-voltage limits. The 1.5A switch current rating suits moderate load applications where efficiency optimization via synchronous rectification is not critical. Ensure adequate thermal relief on the PCB due to the exposed pad requirement.
Part Context
This part belongs to the LT1977 family of high-voltage step-down regulators. It shares functional similarities with the LT1977IFE#PBF but differs in package type. The series is designed for robust performance in noisy environments without requiring external synchronization.
Replacement Considerations
LT1977IFE#PBF serves as a direct pin-compatible alternative with identical electrical specifications but utilizes a different surface-mount package configuration.
