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SC2442HITSTRT
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 24TSSOP
- Series：-
- Mfr：Semtech Corporation
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：2
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：4.75V ~ 36V
- Frequency - Switching：100kHz ~ 1.1MHz
- Duty Cycle (Max)：94%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：24-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：24-TSSOP
- Grade：-
- Qualification：-
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Overview
The SC2442HITSTRT is a dual synchronous buck DC-DC switching controller manufactured by Semtech Corporation. It operates within an input voltage range of 4.75V to 30V and supports a maximum switching frequency of 1.1MHz. The device features two independent output channels with a maximum output current capability of 0.5A per channel. Designed for automotive applications, it functions reliably across a temperature range of -40°C to 125°C TJ. The component is housed in a 24-TSSOP package with a 0.65mm pitch.
Feature Summary
- Dual-channel synchronous buck topology for independent power rail generation
- Integrated clock synchronization capability for multi-phase or parallel operation
- Comprehensive protection including thermal shutdown and over-voltage safeguards
- Supports soft-start functionality and frequency control via external components
Applications
- Automotive infotainment system power distribution
- ADAS sensor module voltage regulation
- Industrial control board DC-DC conversion
Procurement Notes
This specific part number is obsolete and no longer manufactured by Semtech. Procurement must focus on the recommended replacement, TPS43351QDAPRQ1 from Texas Instruments. Verify that the substitute meets all original design constraints, particularly regarding automotive qualification and pin compatibility before finalizing supply chain decisions.
Selection Notes
Select this component only if legacy design continuity is required, though active sourcing is unavailable. For new designs, evaluate the TPS43351QDAPRQ1 as the primary alternative. Ensure the selected solution supports the required 1.1MHz switching frequency and dual-channel architecture while maintaining compliance with automotive temperature grades and EMI requirements.
Part Context
The SC2442 series represents Semtech's portfolio of high-efficiency synchronous buck controllers tailored for demanding environments. These devices are engineered to provide stable power delivery for complex electronic systems requiring multiple regulated outputs. The SC2442 specifically targets applications needing compact solutions with robust transient response capabilities.
Replacement Considerations
The confirmed public substitute is TPS43351QDAPRQ1 (Texas Instruments). This replacement is functionally similar but may require schematic adjustments due to differences in control interface or pinout configuration. Validate electrical parameters against the original design specifications prior to implementation.
