RS19C22 - SVI3 & PMBus
Features
Scalable Dual-Rail Multiphase Control
- The RS19C22 is Dual-Rail architecture supporting up to 12 total phases
- Flexible phase configurations from 12+0 to 8+4
- Flexible phase-order assignment
- Automatic phase add/drop with programmable thresholds
- Per-phase current balancing
- Thermal balance management
- Up to 4 MHz switching frequency
SVI3 and Digital Power Management
- AMD SVI3 compliant
- PMBus™ v1.4.1 compliant
- Multiple-Time Programmability (MTP) with up to 32 writes for field configuration
- Black-box registers for fault-event recording
- Internal compensation
High-Performance Voltage Regulation
- 4.5 V to 16 V input voltage range
- 0.2 V to 2.8 V output voltage range
- ±0.5% output-voltage accuracy with differential sensing
- Programmable DC load line
- Programmable overshoot and undershoot reduction
- Fast dynamic voltage transitions with programmable slew rate
- Native Trans-Inductor Voltage Regulator (TLVR) support with no external passive components
Telemetry
- ±1.5% input- and output-voltage accuracy
- ±1.5% output-current accuracy
- ±2°C temperature accuracy
Protection and Fault Management
- Input UVLO
- Output UVP and OVP
- Overcurrent protection (OCP)
- Overtemperature protection (OTP)
- Cycle-by-cycle, per-phase current limiting
- Programmable latch or hiccup fault response
Optimized for High-Density Power
- Compatible with Reed Semiconductor smart power stages and power modules
- Automatic phase management improves light-load efficiency
- High switching frequency enables smaller external passive components
- Programmable DC load line and transient optimization help reduce output capacitance
- 6 mm × 6 mm, 48-pin QFN package
- RoHS compliant
Description
Scalable 12-Phase SVI3 Multiphase Control for High-Performance Computing
The RS19C22 is a dual-rail, scalable multiphase buck controller designed for high-current processor, accelerator, graphics, server, and telecom power applications. Supporting up to 12 total phases across two output rails, the RS19C22 provides flexible phase configurations from 12+0 to 8+4, enabling a common controller platform to address a wide range of high-density power requirements.
With a 4.5V to 16V input range and 0.2V to 2.8V output range, the RS19C22 combines high-accuracy regulation, advanced transient control, comprehensive telemetry, and programmable protection in a compact 6mm × 6mm, 48-pin QFN package.
Native TLVR Support for Fast Transient Response
The RS19C22 provides native Trans-Inductor Voltage Regulator (TLVR) support without requiring additional external passive components. Combined with programmable DC load-line control and overshoot and undershoot reduction, TLVR support enables fast response to the large, rapid load transients encountered in modern CPUs, GPUs, ASICs, and AI accelerators while helping reduce required output capacitance.
AMD SVI3 and PMBus Digital Power Management
An AMD SVI3-compliant interface supports dynamic voltage control for high-performance processor applications, while the PMBus™ v1.4.1 interface provides system-level configuration, telemetry, monitoring, and fault management.
Multiple-Time Programmability (MTP) allows configuration parameters to be stored for field customization, while integrated black-box fault-event recording provides valuable diagnostic information for system development and troubleshooting.
Intelligent Phase Management and High-Efficiency Operation
Programmable automatic phase add/drop dynamically adjusts the number of active phases according to load conditions to improve efficiency across the operating range. Per-phase current balancing, thermal balance management, and flexible phase-order assignment further optimize power-stage utilization and system performance.
With switching frequencies up to 4MHz, the RS19C22 can also support smaller external passive components for compact, high-power-density voltage regulator designs.
High-Accuracy Telemetry and Comprehensive Protection
Integrated telemetry provides monitoring of input voltage, output voltage, output current, and temperature. Differential output sensing provides ±0.5% output-voltage accuracy, while voltage and current telemetry provide accuracy as tight as ±1.5% and temperature telemetry provides ±2°C accuracy.
Integrated protection includes input undervoltage lockout (UVLO), output undervoltage and overvoltage protection (UVP/OVP), overcurrent protection (OCP), overtemperature protection (OTP), and cycle-by-cycle per-phase current limiting. Programmable fault responses allow the controller to be optimized for system protection requirements.
Optimized for Reed Smart Power Stages and Smart Power Blocks
The RS19C22 is designed to pair with Reed Semiconductor smart power stages and smart power blocks, providing a scalable controller-to-power-stage platform for high-current multiphase solutions. This combination enables compact power architectures with advanced digital control, high-frequency operation, optimized transient response, and flexible phase scalability.
