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Product Detailed Parameters
- Description：IC REG BCK BST ADJ 1.25A 8CERDIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck, Boost, Cuk, Flyback, Forward Converter
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.244V
- Voltage - Output (Max)：65V (Switch)
- Current - Output：1.25A (Switch)
- Frequency - Switching：100kHz
- Synchronous Rectifier：No
- Operating Temperature：-55°C ~ 125°C (TJ)
- Mounting Type：Through Hole
- Package / Case：8-CDIP (0.300", 7.62mm)
- Supplier Device Package：8-CERDIP
- Grade：-
- Qualification：-
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Overview
The LT1172MJ8#PBF is a high-efficiency switching regulator IC from Analog Devices, housed in an 8-pin CDIP package. It supports multiple topologies including Buck, Boost, Cuk, Flyback, and Forward converters. The device features adjustable output voltage with positive or negative output configurations. It operates at a fixed switching frequency of 100kHz and provides peak switch currents of 5A, 2.5A, and 1.25A depending on the topology selected. The component is rated for a junction temperature range of -55°C to 125°C.
Feature Summary
- Supports versatile power conversion topologies including buck, boost, cuk, flyback, and forward converter configurations.
- Features adjustable output voltage capability with flexible positive or negative output polarity options.
- Designed for high efficiency operation with selectable peak current limits of 5A, 2.5A, and 1.25A.
Applications
- Industrial power supply systems requiring isolated or non-isolated DC-DC conversion
- Military and aerospace electronics demanding wide operating temperature ranges
- Telecommunications equipment utilizing flyback or forward converter architectures
Procurement Notes
Verify component authenticity through authorized distributors as this part may be obsolete. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any functional updates. Ensure storage conditions meet moisture sensitivity levels. Validate supplier credentials before purchase.
Selection Notes
Select this component when multi-topology flexibility is required in a single IC solution. Consider the 100kHz switching frequency for EMI management. Evaluate thermal performance given the 125°C junction limit. Compare against newer integrated controllers if board space is constrained. Verify input voltage ranges match application requirements.
Part Context
This part belongs to the LT1172 family of switching regulators designed by Linear Technology, now part of Analog Devices. The MJ8 suffix indicates military-grade qualification and ceramic DIP packaging. These regulators were widely used in ruggedized applications before being superseded by more integrated solutions. The family emphasizes efficiency and versatility in power conversion designs.
Replacement Considerations
LT1172IN8#PBF is a documented similar variant available in SOIC package. Verify pin compatibility and thermal characteristics when substituting. Check if updated components offer improved efficiency or integration levels suitable for modern designs.
