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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 28TSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：2
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 36V
- Frequency - Switching：200kHz
- Duty Cycle (Max)：98.90%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-TSSOP
- Grade：-
- Qualification：-
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Overview
The LM5642MTCX/NOPB is a high-voltage dual synchronous buck controller manufactured by Texas Instruments. It operates with a fixed switching frequency of 200 kHz and supports output voltages ranging from 1.3 V to 32.4 V. The device delivers up to 20 A per channel and functions within an operating temperature range of -40°C to +125°C. It utilizes a TSSOP-28 package for surface mount installation and draws 1.1 mA in quiescent operation.
Feature Summary
- Dual-channel architecture supporting independent synchronous buck conversion
- Integrated clock synchronization capability for noise reduction
- Built-in protection features including current limiting and soft start
Applications
- Industrial power distribution systems
- Telecommunications infrastructure equipment
- High-power computing modules
Procurement Notes
Verify the specific suffix configuration against official datasheets to ensure compatibility with required packaging and environmental standards. Confirm that the TSSOP-28 footprint matches your PCB layout requirements. Check moisture sensitivity levels and reflow soldering profiles prior to assembly to prevent component damage during manufacturing processes.
Selection Notes
Select this component when designing systems requiring two isolated or non-isolated low-voltage rails from a higher input voltage. The 200 kHz frequency offers a balance between efficiency and component size. Ensure input voltage capabilities align with system requirements, as the controller supports high-voltage inputs suitable for industrial applications.
Part Context
This part belongs to the LM5642X family of high-voltage dual synchronous buck controllers. It shares functional similarities with other members like the LM5642XMTX/NOPB but differs in packaging and shipping format. The MTCX designation indicates a tube-packaged variant intended for automated surface-mount assembly lines.
Replacement Considerations
LM5642MTC/NOPB serves as a direct alternative with identical electrical specifications but may differ in reel versus tube packaging configurations.
