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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 28TSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- 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 LM5642MTC is a high-voltage dual synchronous buck controller manufactured by Texas Instruments. It operates with an input voltage range of 4.5V to 36V and supports output voltages from 1.3V to 32.4V. The device features a fixed switching frequency of 200 kHz and delivers up to 20A per channel. It utilizes a TSSOP-28 package and functions within a temperature range of -40°C to +125°C.
Feature Summary
- Dual-channel architecture for independent power rail generation
- Integrated synchronous rectification for improved efficiency
- Supports clock synchronization for noise management
- Includes soft-start and current limit protection features
Applications
- Industrial equipment power distribution
- Telecommunications infrastructure systems
- Enterprise server power supplies
Procurement Notes
Verify the specific suffix 'MTC' corresponds to the TSSOP-28 package variant when sourcing. Confirm RoHS compliance status via the manufacturer datasheet. Ensure ESD handling protocols are followed during assembly due to moisture sensitivity classification. Cross-reference ordering information with official Texas Instruments documentation to avoid packaging discrepancies.
Selection Notes
Select this component for designs requiring two isolated or non-isolated low-voltage outputs from a higher voltage bus. The 200 kHz frequency balances component size and efficiency. Verify that the thermal performance of the TSSOP-28 package meets the system's heat dissipation requirements under maximum load conditions without additional heatsinking.
Part Context
This part belongs to the LM5642X family of high-voltage dual synchronous buck controllers. It is designed for applications needing compact, efficient power conversion solutions. The device integrates control logic for two independent buck converters, simplifying board layout compared to discrete solutions.
Replacement Considerations
Check for LM5642XMH/NOPB if HTSSOP-28 packaging is acceptable. Verify LM5642XMT/NOPB for alternative frequency options. Confirm pinout compatibility before substitution.
