ISL68137IRAZ - Digital 7-Phase PWM Controller | Renesas
MPN: ISL68137IRAZ ✓ NakahandaISL68137IRAZ Ulas
A digital multiphase PWM controller is a power-management IC that drives multiple buck-converter phases in parallel to deliver high currents (>100 A) with fast transient response, dynamic phase adding/dropping, and per-loop digital compensation. The ISL68137 belongs to the voltage regulator controller family, specifically the multiphase PWM controller category, sitting above power-stage DrMOS/MOSFETs and below the system PMBus master in the power tree hierarchy.
Key features include on-chip nonvolatile memory for storing user-selected configuration via pin-strap, automatic phase add/drop for efficiency across load ranges, AVSBus adaptive voltage scaling, full PMBus 1.3.1 command set, and ±0.5% output voltage accuracy across line, load, and temperature. The -40C to +85C industrial operating range supports datacom, telecom, and high-performance computing platforms.
Architecturally, the device pairs a digital core with mixed-signal PWM modulators and per-loop PID compensation, allowing firmware-free, pin-strap configuration while preserving digital telemetry and fault logging. The 6x6 mm QFN-48 footprint with exposed pad provides low thermal resistance for high-phase-count designs where controller dissipation matters.
Typical applications include server core/CPU VRs, DDR memory VRs, GPU and ASIC rails, networking switch PCIe/SoC rails, and industrial high-current POL converters. In any rail where >80 A is needed with adaptive voltage scaling, the ISL68137 is a strong candidate.
Designers should plan for 4-layer or higher PCB stack-ups with adequate via arrays under the exposed pad, a dedicated 3.3 V bias rail for VCC, and PMBus pull-ups per the SMBus specification. Verify phase-current-sense resistor selection before committing layout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na ISL68137IRAZ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ISL68137IRAZ (parehas na form factor at footprint) — pagkakaiba sa Operating Temperature Range, Package.
ISL68137IRAZ-T
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ISL68137IRAZ-TR5781
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL68137IRAZ Mga Pinakamataas na Rating at Electrical Characteristics
| Topolohiya | Digital multiphase PWM controller (X+Y ≤ 7 phases) |
| Bilang ng Outputs | 2 (configurable) |
| Maximum Total Phases | 7 (e.g. 6+1, 5+2, 4+2, 3+3, 3+2, 7+0) |
| Digital Interface | PMBus 1.3.1 + AVSBus |
| Adaptive Voltage Scaling | Yes (AVSBus) |
| Output Voltage Accuracy | ±0.5% across line/load/temperature |
| On-chip Nonvolatile Memory | Yes (pin-strap configurable) |
| Phase Add/Drop | Automatic |
| Hanay ng Temperature na Operasyon | -40C to +85C |
| Packhaging | 48-lead QFN (6x6 mm) with exposed pad |
| Package Drawing | L48.6x6B |
| Uri ng Pagpapasok | Surface Mount |
| RoHS Compliance | Pb-free, RoHS compliant |
| Reel Options | -T (4k), -T7A (250), -TR5781 (custom) |
Gabay sa Pin Configuration ng ISL68137IRAZ l48.6x6b
Pin configuration para sa ISL68137IRAZ (l48.6x6b package). Ang power device na ito ay may gate, drain, at source terminals. Para sa mga non-polarized package, sumangguni sa datasheet ng manufacturer para sa eksaktong oryentasyon ng pin 1 at mga detalye ng footprint. Kasama sa mga karaniwang aplikasyon ang disenyo ng power supply, motor driving, at load switching.
Wala ng detalyadong pinout data na magagamit para sa ISL68137IRAZ.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ISL68137IRAZ ay nararapat para sa 7 aplikasyons: Server CPU/Core Voltage Regulator, DDR4/DDR5 Memory VR, GPU/ASIC Power Rails, Networking Switch SoC/PCIe Rails, Industrial High-Current POL Converters, Datacenter Telemetry and Power Management, Telecom Base Station Power.
Server CPU/Core Voltage Regulator
The ISL68137IRAZ drives 6+1 or 7+0 multiphase buck configurations to power server CPU cores up to 200 A+. Its ±0.5% output accuracy and AVSBus interface enable precise VID transitions for Intel/AMD power-state changes, while automatic phase add/drop optimizes light-load efficiency. Renesas reference designs pair the ISL68137 with DrMOS stages for 80-200 A server rails. PMBus 1.3.1 telemetry allows real-time monitoring of current, voltage, and temperature for datacenter management.
Inirekomenda
DDR4/DDR5 Memory VR
In 3+3 or 4+2 phase configurations, the ISL68137IRAZ powers DDR memory rails with tight voltage regulation (±0.5%) and fast transient response required by DDR5 spec. The AVSBus interface supports dynamic voltage scaling during self-refresh and write-levelling training. The exposed thermal pad and 6x6 mm footprint fit comfortably under memory DIMM areas on server motherboards. Pin-strap NVM lets OEMs configure memory and core rails with one BOM line.
Inirekomenda
GPU/ASIC Power Rails
The ISL68137IRAZ supports 5+2 and 6+1 configurations ideal for high-current GPU and AI ASIC rails. AVSBus adaptive voltage scaling matches aggressive workload-dependent VID profiles for inference accelerators, while PMBus provides per-rail telemetry to BMC/host. The 7-phase total headroom lets one controller drive both GPU core and HBM stacks. Designers pair the ISL68137 with high-current DrMOS stages rated 60 A+ each.
Inirekomenda
Networking Switch SoC/PCIe Rails
In 4+2 or 3+3 mode, the ISL68137IRAZ powers switch SoCs and PCIe Gen5 PHYs in 48-port switches and routers. Its industrial -40C to +85C temperature range supports outdoor and NEBS-compliant telecom environments, while PMBus telemetry integrates with switch BMCs. The exposed pad and 48-QFN footprint fits high-density switch PCB designs where space under the SoC is at a premium.
Inirekomenda
Industrial High-Current POL Converters
For industrial PLCs, test equipment, and factory automation, the ISL68137IRAZ delivers >100 A rails with PMBus programmability and pin-strap configuration that simplifies BOM across product variants. The -40C to +85C industrial range, RoHS compliance, and exposed thermal pad enable fan-less designs. Automatic phase add/drop optimizes efficiency across varying industrial load profiles from standby to peak.
Inirekomenda
Datacenter Telemetry and Power Management
In datacenter server platforms, the ISL68137IRAZ reports per-rail voltage, current, temperature, and fault status over PMBus 1.3.1 to the BMC for closed-loop power capping and workload balancing. AVSBus provides faster than PMBus VID transitions for fast-sleep CPU states, improving overall datacenter PUE. Renesas pin-strap NVM lets OEMs ship one controller across multiple SKUs (1P, 2P, 4P) without firmware changes.
Inirekomenda
Telecom Base Station Power
In 5G base station BBU and radio units, the ISL68137IRAZ powers DSP, FPGA, and SoC rails with the -40C to +85C industrial operating range required by NEBS. AVSBus supports fast dynamic voltage scaling for traffic-burst-dependent load profiles, while PMBus telemetry integrates with telecom-element management systems. The exposed-pad QFN package provides thermal headroom in sealed outdoor enclosures.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ISL68137IRAZ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ISL68137IRAZ-T | ISL68137IRAZ-TR5781 |
|---|---|---|---|
| Package | 48-QFN (6x6 mm) - L48.6x6B | 48-QFN (6x6 mm) - L48.6x6B - same | 48-QFN (6x6 mm) - L48.6x6B - same |
| Brand | Renesas Electronics | Renesas Electronics - same | Renesas Electronics - same |
| Topology | Dual output, X+Y ≤ 7 phases | Dual output, X+Y ≤ 7 phases - same | Dual output, X+Y ≤ 7 phases - same |
| Digital Interface | PMBus 1.3.1 + AVSBus | PMBus 1.3.1 + AVSBus - same | PMBus 1.3.1 + AVSBus - same |
| Output Voltage Accuracy | ±0.5% | ±0.5% - same | ±0.5% - same |
| On-chip NVM | Yes (pin-strap configurable) | Yes - same | Yes - same |
| Operating Temperature | -40C to +85C | -40C to +85C - same | -40C to +85C - same |
| Packaging Format | Bulk | Tape & Reel (4,000) | Custom Reel (TR5781) |
| RoHS Compliance | Pb-free, RoHS compliant | Pb-free, RoHS compliant - same | Pb-free, RoHS compliant - same |
Pangunahing mga Pagkakaiba
- AVSBus adaptive voltage scaling (kumpara saISL68127IRCZ (earlier Renesas controller))
- Dual-output configurability with single BOM line (kumpara saISL68134 (single-loop variant))
- Pin-strap NVM configuration (kumpara saCompetitor controllers requiring firmware upload)
Talaan ng Disenyo
Estimated: The ISL68137IRAZ dissipates up to ~1.5 W when driving 7 phases at 1 MHz switching frequency and 25C ambient. The 48-QFN 6x6 mm exposed pad (per Renesas drawing L48.6x6B) requires a continuous PGND copper plane on the top layer with at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch) connecting to inner PGND layers. Without adequate via arrays, theta_JA can exceed 35 C/W and force thermal derating in dense 7-phase designs.
Route PMBus and AVSBus traces as 50-ohm impedance-controlled differential pairs (SDA/SCL, ASDA/ASCL) with 2 kohm pull-ups to 3.3 V per SMBus specification. Place the ISL68137 at least 25 mm away from switching node edges and current-sense resistors to avoid digital-noise coupling into analog ground. Keep phase PWM traces short and symmetric to minimize timing skew between parallel phases.
Do not populate the ISL68137IRAZ on a layout originally designed for the ISL68127IRCZ without re-validation - the 48-QFN ball map differs between the two families, and PCB re-spin is required. Always verify the pin-strap NVM configuration matches the desired phase count (X+Y ≤ 7) before firmware upload. Failure to enable automatic phase add/drop can degrade light-load efficiency by 15-20%.
Impormasyon ng Pagsunod sa Kautusan
RoHS Pb-free per Renesas datasheet note 2. Industrial -40C to +85C grade - not AEC-Q100 qualified; AEC-Q100 is not applicable for digital controller ICs in this category.
