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Product Detailed Parameters
- Description：IC REG BUCK ADJ 550MA 8SO
- 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)：7.4V
- Voltage - Input (Max)：60V
- Voltage - Output (Min/Fixed)：1.24V
- Voltage - Output (Max)：51V
- Current - Output：550mA (Switch)
- Frequency - Switching：100kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
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Overview
The LT1676IS8#PBF is a high-efficiency buck switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 7.4V to 60V and provides an adjustable output voltage from 1.24V to 51V. The device delivers a switch current of 550mA at a fixed switching frequency of 100kHz. It features a single positive output configuration without synchronous rectification. The component is housed in an 8-SOIC package (3.90mm width) and supports surface mount installation. It is rated for operation within a junction temperature range of -40°C to 125°C.
Feature Summary
- Supports wide input voltage ranges up to 60V for robust power conversion
- Provides adjustable output voltage control via external feedback network
- Operates at a fixed 100kHz switching frequency for consistent performance
- Includes shutdown functionality for power management optimization
Applications
- Automotive DC/DC conversion systems
- Telecommunications 48V step-down applications
- IEEE1394 (FireWire) step-down converters
Procurement Notes
Verify the specific suffix IS8 indicates industrial temperature grade (-40°C to 125°C) compared to commercial variants. Confirm the #PBF designation ensures lead-free and RoHS compliance as per manufacturer standards. Cross-reference the 8-SOIC package dimensions with PCB footprint requirements. Ensure input voltage specifications align with system supply rails before integration.
Selection Notes
Select this component when a non-synchronous buck topology is acceptable for 550mA loads. The fixed 100kHz frequency suits applications where EMI filtering is manageable. Verify that the 7.4V minimum input voltage meets the lowest expected supply rail. Consider thermal dissipation capabilities within the SO-8 package for the target ambient conditions.
Part Context
This part belongs to the LT1676 family of high-voltage, high-efficiency buck regulators. It shares core architecture with variants like LT1676CS8 but differs in temperature rating and packaging options. The series is designed for general-purpose step-down conversion in environments requiring wide input voltage tolerance.
Replacement Considerations
LT1676CS8#PBF serves as a commercial-grade alternative with identical electrical specifications but a limited operating temperature range of 0°C to 125°C.
