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LX1681CDM is listed in the DC DC Switching Controllers range at ChipApex. The manufacturer field lists Microsemi Corporation. Its product description is IC REG CTRLR BUCK 8SOIC. Review the specifications below when checking this part for your BOM.
DC DC Switching Controllers specifications for LX1681CDM
- Description：IC REG CTRLR BUCK 8SOIC
- Series：-
- Mfr：Microsemi Corporation
- Package：Bulk
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：5V
- Frequency - Switching：190kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Soft Start
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
DC DC Switching Controllers datasheet and documents for LX1681CDM
DC DC Switching Controllers Overview
The LX1681CDM is a monolithic pulsewidth modulation controller IC designed for flexible, low-cost buck regulator supplies. It operates with a 5V supply voltage and features a fixed switching frequency of 190kHz. The device provides a single positive output via a transistor driver in an 8-SOIC package. Key control characteristics include current limit protection and soft start functionality. It is rated for operation within a temperature range of 0°C to 70°C.
DC DC Switching Controllers Feature Summary
- Implements flexible, low-cost step-down DC-DC regulation using voltage-mode PWM control
- Integrates essential protection mechanisms including current limiting and soft-start capabilities
- Designed as a standalone controller requiring external power switches for buck topology implementation
DC DC Switching Controllers Applications
- General-purpose step-down DC-DC converter designs
- Embedded system power distribution networks
- Industrial control equipment power supplies
DC DC Switching Controllers Procurement Notes
Verify component authenticity due to obsolete status. Confirm package marking matches Microsemi specifications. Check datasheet revisions for any design-in changes. Ensure supplier documentation references the specific CDM suffix for commercial grade temperature rating. Validate RoHS compliance status through official manufacturer records.
DC DC Switching Controllers Selection Notes
Select this controller for applications requiring simple buck regulation without integrated power stages. Consider the fixed 190kHz frequency when designing magnetic components. Evaluate thermal performance within the specified operating range. Compare against newer alternatives if long-term availability is critical for the product lifecycle.
DC DC Switching Controllers Part Context
The LX1681 series includes companion devices like the LX1682. This component belongs to Microsemi's legacy PMIC portfolio now managed by Microchip. It serves as a foundational controller for non-synchronous buck converters. The CDM suffix denotes the commercial temperature variant housed in standard SOIC packaging.
DC DC Switching Controllers Replacement Considerations
The part is officially marked as obsolete. No direct public substitute part numbers are confirmed in available documentation. Designers should consult Microchip for recommended upgrades or equivalent functional replacements.
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