RS19822 - SVI3 & PMBus
Features
Native TLVR & High-Performance Control
- The RS19822 is a native Trans-Inductor Voltage Regulator (TLVR) support
- No external passive components required
- Up to 4 MHz switching frequency
- Constant On-Time (COT) control for fast transient response
- Built-in 1 kΩ current-sense resistor
- Internal compensation
Flexible Multiphase Architecture
- Dual-rail controller supporting up to 8 total phases (8+0 to 4+4)
- Flexible phase assignment
- Automatic phase add/drop for improved light-load efficiency
- Thermal balance management
Optimized for Reed Semiconductor Power Solutions
- Designed for Reed Semiconductor Smart Power Stages
- Compatible with Reed Smart Power Blocks and Integrated Power Modules
- High-density, high-efficiency VRM solutions
Precision Regulation & Telemetry
- 4.5 V to 16 V input voltage
- 0.2 V to 2.8 V output voltage
- Differential remote voltage sensing
- ±0.5% output voltage accuracy
- ±1.5% input/output voltage telemetry
- ±1.5% output current telemetry
- ±2°C temperature telemetry
Advanced Digital Control
- AMD SVI3 compliant
- PMBus™ v1.3.1 interface
- Built-in Multiple-Time Programmability (MTP)
- Up to 32 field reprogramming cycles
- Black-box fault recording
- Programmable DC load-line compensation
- Programmable overshoot and undershoot reduction
Comprehensive Protection
- Programmable latch-off or auto-retry fault response
- UVLO, UVP, OVP, OCP and OTP
- Cycle-by-cycle per-phase current limiting
High-Efficiency System Optimization
- Automatic phase management for improved efficiency
- Reduced output capacitance with TLVR architecture
- Lower external component count
- Optimized PCB area and BOM cost
- Improved thermal performance
Package & Compliance
- Compact 5 mm × 5 mm, 40-pin QFN package
- RoHS compliant
Description
High-Performance 8-Phase Digital Multiphase Controller
The RS19822 is a dual-rail digital multiphase buck controller supporting up to 8 total phases (8+0 to 4+4) for AMD server processors, AI accelerators, networking equipment, telecommunications infrastructure, and high-current FPGA applications. Native Trans-Inductor Voltage Regulator (TLVR) support, AMD SVI3 compatibility, PMBus™ v1.3.1, and Multiple-Time Programmability (MTP) deliver outstanding transient response, precise voltage regulation, and comprehensive telemetry for today’s high-performance computing platforms.
Designed to integrate seamlessly with Reed Semiconductor Smart Power Stages, Smart Power Blocks, and Integrated Power Modules, the RS19822 enables compact, high-density voltage regulator solutions with improved efficiency, reduced PCB area, and lower overall system cost. Advanced digital control features—including programmable DC load-line compensation, automatic phase add/drop, programmable overshoot and undershoot reduction, and intelligent thermal balancing—allow designers to optimize performance across demanding processor workloads.
Native TLVR Architecture
Native TLVR Support
The RS19822 features native Trans-Inductor Voltage Regulator (TLVR) support without requiring additional external passive components. TLVR technology significantly improves load transient response while reducing output capacitance requirements for modern AMD processors, GPUs, and AI computing platforms.
Fast Dynamic Voltage Regulation
Advanced Constant-On-Time (COT) control, programmable slew rates, and digital compensation enable rapid response to large load current transients while minimizing voltage overshoot and undershoot.
Flexible Multiphase Architecture
Up to 8 Total Phases
Supporting flexible dual-channel configurations from 8+0 to 4+4, the RS19822 allows designers to optimize power delivery for high-current processor cores and multi-rail power architectures.
Intelligent Phase Management
Automatic phase add/drop improves light-load efficiency while maintaining exceptional transient performance during dynamic processor workloads.
Flexible Phase Assignment
Configurable phase ordering simplifies PCB routing and enables compact, high-current voltage regulator designs.
Optimized for Reed Semiconductor Power Solutions
Smart Power Stages
The RS19822 is optimized for use with Reed Semiconductor Smart Power Stages, enabling highly efficient processor voltage regulators with exceptional thermal performance and industry-leading power density.
Smart Power Blocks
When paired with Reed Smart Power Blocks, the RS19822 creates compact, high-current multiphase power solutions with optimized switching performance and simplified PCB layout.
Intermediate Bus Converters
The RS19822 also complements Reed Semiconductor’s family of Integrated Power Modules, allowing designers to build scalable digital power architectures using a common PMBus management interface.
Precision Digital Control & Telemetry
AMD SVI3 and PMBus Interface
Native support for AMD SVI3 together with PMBus™ v1.4.1 enables complete digital configuration, telemetry, and system management for AMD server processors, AI accelerators, and enterprise computing platforms.
High-Accuracy Telemetry
Integrated telemetry provides precise monitoring of critical system parameters, including:
- ±1.5% input voltage accuracy
- ±1.5% output voltage accuracy
- ±1.5% output current accuracy
- ±2°C temperature accuracy
Multiple-Time Programmability
Built-in Multiple-Time Programmability (MTP) supports up to 32 rewrites, allowing production calibration, firmware updates, and field optimization throughout the product lifecycle.
Advanced Voltage Regulation
Programmable Load-Line Compensation
Programmable DC load-line compensation enables designers to optimize processor voltage regulation while minimizing external output capacitance.
Optimized Transient Performance
Programmable overshoot and undershoot reduction thresholds improve voltage regulation during rapidly changing processor workloads found in AMD server CPUs, AI accelerators, and networking processors.
Internal Compensation
Integrated compensation reduces external component count while simplifying loop stability design and accelerating system development.
Comprehensive Protection Features
The RS19822 integrates a complete suite of programmable protection functions to maximize system reliability.
Protection Functions
- Programmable latch-off or auto-retry fault response
- Input undervoltage lockout (UVLO)
- Output undervoltage protection (UVP)
- Output overvoltage protection (OVP)
- Overcurrent protection (OCP)
- Overtemperature protection (OTP)
- Cycle-by-cycle per-phase current limiting
Integrated fault logging simplifies validation, troubleshooting, and field diagnostics.
High Efficiency & Reduced System Cost
The RS19822 combines advanced digital control with intelligent power management to improve efficiency while reducing overall system complexity.
Benefits include:
- Native TLVR architecture requiring fewer external passive components
- Reduced output capacitance
- Smaller PCB footprint
- Automatic phase management for higher efficiency
- Lower BOM cost
- Simplified PCB layout
- Optimized thermal performance
These capabilities make the RS19822 an excellent choice for AMD-based servers, AI accelerators, networking equipment, telecommunications infrastructure, and other high-current digital power applications.
Related Reed Semiconductor Products
The RS19822 is designed to operate seamlessly with other Reed Semiconductor digital power solutions.
Smart Power Stages
- RS86610 (2.5 to 16VIN, 60A . ≤2MHz 4 x 5mm TLGA-25)
- RS86810 (2.5 to 16VIN, 90A, ≤2MHz 5 x 6mm TLGA-41)
- RS85A01 (2.5 to 7.5VIN, 100A, ≤3MHz 5 x 6 TLGA-41)
Smart Power Blocks
- RSM5G02 (2.5 to 7.5VIN, 2-Phase, 140A module 10 x 9 x 8mm LGA-72)
- RSM6G03 (2.5 to 16VIN, 2-Phase, 140A module 10 x 9 x 4mm LGA-72)
- RSM5G05 ( 2.5 to 7,5VIN, 2-Phase 140A module 10 x 9 x 5 mm LGA-72)
Intermediate Bus Converters
Digital Multiphase Controllers
