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SC451ITSTRT
Semtech Corporation
IC REG CTRLR IMVP-4 1OUT 28TSSOP
8637 Pcs New Original In Stock
- Controller, Intel IMVP-4, IMVP-4+™ Voltage Regulator IC 1 Output 28-TSSOP
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (368 Ratings)
SC451ITSTRT
Product Overview
7213111
DiGi Electronics Part Number
SC451ITSTRT-DGManufacturer
Semtech Corporation
SC451ITSTRT
Description
IC REG CTRLR IMVP-4 1OUT 28TSSOPInventory
8637 Pcs New Original In Stock
- Controller, Intel IMVP-4, IMVP-4+™ Voltage Regulator IC 1 Output 28-TSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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SC451ITSTRT Technical Specifications
Category
Power Management (PMIC), Special Purpose Regulators
Packaging
Tape & Reel (TR)
Series
-
Product Status
Not For New Designs
Applications
Controller, Intel IMVP-4, IMVP-4+™
Voltage - Input
3V ~ 30V
Number of Outputs
1
Voltage - Output
0.7V ~ 1.708V
Operating Temperature
-
Mounting Type
Surface Mount
Package / Case
-
Supplier Device Package
28-TSSOP
Base Product Number
SC451
Datasheet & Documents
HTML Datasheet
SC451ITSTRT-DG
Environmental & Export Classification
RoHS Status
RoHS Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
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December 02, 2025
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December 02, 2025
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December 02, 2025
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December 02, 2025
The after-sales response from DiGi Electronics ensures that any concerns are addressed promptly.
December 02, 2025
Timely delivery and comprehensive tracking made my shopping experience with DiGi Electronics outstanding.
December 02, 2025
DiGi Electronics' website provides helpful suggestions and related items to improve my shopping experience.
December 02, 2025
The quick turnaround and secure packaging exceeded my expectations.
December 02, 2025
Their post-purchase support is reliable and prompt, giving me confidence in their products.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the SC451ITSTRT as a replacement controller in modern IMVP-4+ applications, given its 'Not For New Designs' status?
The SC451ITSTRT is marked 'Not For New Designs,' indicating Semtech has superseded it with newer controllers such as the SC452 or SC453. Using the SC451ITSTRT in new designs risks long-term supply discontinuation and lack of technical support. For IMVP-4+ applications, ensure backward compatibility with updated regulation requirements and validate transient response behavior with modern processors. Always secure extended obsolescence buy options or transition plans when incorporating SC451ITSTRT in new production runs to avoid future redesign delays.
How does the SC451ITSTRT handle power sequencing in CPU VRM applications, and what external components are needed to comply with IMVP-4+ specifications?
The SC451ITSTRT requires external sequencing logic to meet IMVP-4+ CPU rail power-up/down timing, as it lacks integrated power sequencing. Use a sequencer IC like the TPS3820 or discrete RC circuits with voltage supervisors to coordinate Vcc, Vtt, and PLL voltages. Ensure precise alignment with Intel’s Power State transitions (C0-C6), especially during S3/S4 states, by monitoring enable (EN) and voltage identification (VID) inputs. Poor sequencing can trigger faults or reduce CPU reliability.
What are the practical voltage input limitations of the SC451ITSTRT in 12V point-of-load systems, and how can overvoltage transients affect performance?
While the SC451ITSTRT supports up to 30V input, typical use in 12V IMVP-4+ systems requires robust input filtering to suppress transients originating from hot-swap events or power rail contention. Use transient voltage suppression (TVS) diodes on the VIN pin and ensure the bootstrap circuit for high-side FETs is rated above 16V. Designers should also validate startup behavior under cold temperature conditions, where input rise time may impact soft-start reliability.
Can the SC451ITSTRT be used to replace Intersil ISL6219 or Renesas RAA227050 in legacy mobile VRM designs, and what are the critical pin compatibility differences?
The SC451ITSTRT is functionally similar but not pin-to-pin compatible with the ISL6219 or RAA227050. Key differences include VID code interpretation, enable logic polarity, and over-current protection thresholds. Direct substitution risks incorrect output voltage regulation or thermal shutdown faults. When replacing ISL6219 or RAA227050 with SC451ITSTRT, redesign the feedback network, update the PCB layout to match the 28-TSSOP footprint, and re-validate load-line calibration and droop control with actual VID codes.
What are the reliability concerns when operating the SC451ITSTRT in high-temperature industrial environments, and how can thermal runaway be prevented in multi-phase designs?
Although the SC451ITSTRT does not specify an operating temperature range, real-world reliability in high-ambient (>70°C) environments depends on PCB thermal design. Use thermal vias under the exposed pad (if applicable) and ensure symmetrical phase current sharing in multi-phase setups to prevent one phase from dominating. Include temperature compensation in the current sense circuit and monitor inductor core saturation. Without proper thermal management, localized heating can cause timing skew in gate drive signals, increasing FET switching losses and risking thermal runaway.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
SC451ITSTRT CAD Models
Semtech Corporation SC451ITSTRT PCB symbols & footprints
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