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SC1159SWTRT
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 28SOIC
- Series：-
- Mfr：Semtech Corporation
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：11.4V ~ 13V
- Frequency - Switching：-
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Power Good, Soft Start
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：28-SO
- Grade：-
- Qualification：-
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Overview
The SC1159SWTRT is a programmable synchronous DC/DC hysteretic controller designed for single-ended power supply applications prioritizing efficiency. It features a user-selectable hysteresis mode and supports the VRM 8.5 VID range. The device includes a 5-bit DAC for programmable output voltage adjustment between 1.050V and 1.825V. It achieves up to 95% efficiency with +1% tolerance over temperature. Integrated functions include on-chip power good indication, overvoltage protection (OVP), under-voltage lockout, soft-start, and inhibit capabilities.
Feature Summary
- Hysteretic control architecture with user-selectable hysteresis for high-efficiency operation
- Integrated 5-bit DAC enabling precise programmable output voltage within specified range
- Comprehensive protection suite including overvoltage protection, under-voltage lockout, and soft-start
Applications
- Server Systems and Workstations
- Pentium III Core Supplies
- AMD Athlon Core Supplies
- Multiple Microprocessor Supplies
- Voltage Regulator Modules
Procurement Notes
Verify the specific suffix SWTRT against official Semtech documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure the order matches the exact part number required for VRM 8.5 compatibility. Cross-reference the datasheet revision date to confirm pinout and electrical parameter consistency before finalizing procurement.
Selection Notes
Select this component when designing single-ended power supplies where efficiency is the primary concern and hysteretic control is preferred. It is suitable for powering advanced microprocessors requiring the VRM 8.5 VID range. Consider the integrated OVP and soft-start features for simplified design implementation without external protection components.
Part Context
The SC1159 belongs to Semtech's family of synchronous buck switch-mode controllers. It is engineered to meet Intel specifications for powering advanced processors. The device integrates essential control logic and protection features into a compact solution, reducing the component count required for high-performance voltage regulation in computing platforms.
Replacement Considerations
Consult official Semtech substitution guides for verified alternatives. Generic replacements may not support the specific VRM 8.5 VID range or hysteretic control characteristics required for compatible processor core supplies.
