ISL68137IRAZ-T - 7-Phase Dual-Output PWM Controller | Renesas
MPN: ISL68137IRAZ-T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2738 | $3.27 |
| 10 | $3.2738 | $32.74 |
| 100 | $3.2738 | $327.38 |
| 500 | $3.2738 | $1,636.90 |
| 1,000 | $3.2738 | $3,273.80 |
| 4,000 | $3.2738 | $13,095.20 |
ISL68137IRAZ-T Overview
A digital multiphase PWM controller coordinates multiple high-current gate drivers to produce a low-ripple, high-efficiency CPU or processor voltage-regulator module. Unlike a single-phase regulator, a multiphase architecture distributes power delivery across parallel power stages, reducing current stress and supporting flexible rail assignments when different subsystems require separate output voltages. The ISL68137 belongs to the power-management IC hierarchy and is used where sequencing, telemetry, and rapid load transitions matter more than the simplicity of a basic voltage regulator.
Key verified attributes include dual outputs, a maximum seven-phase configuration, pin-strap-selectable setup stored in on-chip nonvolatile memory, automatic phase add and drop, an AVSBus interface, and a 48-lead QFN package. The -T ordering suffix denotes the 4,000-unit tape-and-reel option, while the manufacturer package designation is L48.6x6B. Its RoHS-compliant status is explicitly identified in the Renesas part-number table.
The controller is intended for high-current computing platforms requiring configurable dual-rail or combined multiphase power delivery. Pin-strap configuration allows a board to select operating parameters without an external configuration sequence, while stored settings can support platform-specific deployments. Firmware and board designers must still validate timing, fault behavior, rail sequencing, and power-stage compatibility before production use.
Typical uses include CPU voltage-regulator modules, accelerator rails, multi-output server or desktop power systems, and communication equipment requiring phase-count flexibility. The X+Y architecture can combine phases on one output or divide them across two outputs as power demands change. Automatic phase control can reduce active phase count during light loads, improving conversion efficiency.
Layout is critical because the device coordinates high-current switching loops. Follow the manufacturer's recommended component placement and exposed-pad thermal layout exactly, keep power-stage drive traces short, and provide clean current and return paths. Validate AVSBus connectivity, nonvolatile settings, telemetry, fault shutdown, and each rail's startup sequence across worst-case load and temperature conditions.
This page consolidates verified Renesas product information, distributor availability, pricing context, and design-focused guidance. Because no publicly verified pin-for-pin replacement was identified in the supplied cross-reference results, cross-package or merely functional controllers are not presented as drop-in alternatives.
Drop-in alternatives for ISL68137IRAZ-T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ISL68137IRAZ-T (same form factor and footprint) — differing in Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesISL68137IRAZ-T Maximum Ratings & Electrical Characteristics
| Controller Type | Digital dual-output configurable PWM controller |
| Maximum Total Phase Count | 7 phases |
| Supported Phase Assignments | X+Y ≤ 7, including 6+1, 5+2, 4+2, 3+3, 3+2, and 7+0 |
| Output Configuration | Dual positive-output PWM outputs |
| Bus Interface | Adaptive Voltage Scaling Bus (AVSBus) |
| Configuration Storage | On-chip nonvolatile memory |
| Configuration Selection | User-selectable through pin-strap |
| Phase Control | Automatic phase add and drop |
| Operating Temperature Range | -40°C to +85°C |
| Package | 48-lead QFN, 6 x 6 mm |
| Manufacturer Package Drawing | L48.6x6B |
| Ordering Package Option | -T: 4,000-unit tape-and-reel option |
| Mounting Type | Surface mount |
| RoHS Status | RoHS-compliant package |
ISL68137IRAZ-T -t: 4,000-unit tape-and-reel option Pin Configuration Guide
Pin configuration for ISL68137IRAZ-T (-t: 4,000-unit tape-and-reel option package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for ISL68137IRAZ-T.
Refer to the datasheet for full pin configuration.
Typical Applications
ISL68137IRAZ-T is suitable for 6 applications: CPU Voltage-Regulator Modules, Accelerator Multi-Rail Power, Dual-Output Server Power Systems, High-Current Communications Equipment, Configurable Compute Power Platforms, Industrial Processor Power Modules.
CPU Voltage-Regulator Modules
The ISL68137IRAZ-T fits high-current CPU VRMs because it can allocate up to seven phases while supporting X+Y configurations such as 7+0, 6+1, 5+2, 4+2, or 3+3. This permits phase allocation to follow different rail requirements without changing the controller architecture. The automatic phase add/drop function also supports changing efficiency requirements as processor load changes. Validation must cover gate-driver compatibility, current sharing, rail sequencing, fault response, and AVSBus control.
Recommended
Accelerator Multi-Rail Power
The ISL68137IRAZ-T is appropriate when an accelerator platform needs two controllable outputs with flexible phase distribution. Its verified X+Y architecture can place more phases on the higher-current rail and fewer phases on a companion rail, while on-chip nonvolatile memory retains selected configuration settings. The -40°C to +85°C part range suits many computing environments, but board-level validation remains necessary for transient response, power limits, telemetry, and autonomous phase transitions.
Recommended
Dual-Output Server Power Systems
The ISL68137IRAZ-T can support server and workstation power systems that need two regulated domains derived from high-current multiphase converters. Its configurable phase assignments let designers allocate up to seven phases between outputs according to load demand. Pin-strap-selectable settings stored in nonvolatile memory can simplify board configuration and platform reuse. Designers must verify controller supply compatibility, communication behavior, rail sequencing, fault shutdown, and thermal performance on the target power stages.
Recommended
High-Current Communications Equipment
The ISL68137IRAZ-T is relevant to communications equipment with demanding processor or digital-signal-processing rails and an option for dual-output support. Flexible X+Y phase allocation allows power-stage resources to follow the relative demands of two domains, while automatic phase management addresses load-range efficiency. Because the controller uses a 6 x 6 mm QFN, careful exposed-pad layout and high-current loop design are essential. Firmware must verify AVSBus behavior and configuration retention before deployment.
Recommended
Configurable Compute Power Platforms
The ISL68137IRAZ-T helps designers reuse one controller platform across different dual-rail phase assignments because X+Y can be configured up to seven phases. User-selectable pin-strap settings stored in on-chip nonvolatile memory support board-specific deployment, reducing the need for a separate external setup path. This is useful for configurable compute modules and embedded platforms that must accommodate changing processor power maps. Production qualification should still include startup, shutdown, fault-injection, and brownout testing.
Recommended
Industrial Processor Power Modules
The ISL68137IRAZ-T can serve industrial processor modules that need one or two high-current outputs and adjustable phase allocation. Its verified -40°C to +85°C temperature range covers many industrial environments, and automatic phase add/drop can reduce active power stages during lighter loads. The 48-lead QFN requires careful layout, exposed-pad thermal management, and clean digital interfaces. Engineers should confirm noise immunity, component availability, fault behavior, and all electrical limits against the manufacturer datasheet.
Recommended
Recommended Products Summary
Engineering reference data for ISL68137IRAZ-T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | Renesas Electronics |
| Package | 48-lead QFN, 6 x 6 mm |
| Controller Architecture | Digital dual-output PWM controller |
| Maximum Phase Count | 7 total phases |
| Phase Assignments | X+Y ≤ 7 |
| Bus Interface | Adaptive Voltage Scaling Bus |
| Configuration Memory | On-chip nonvolatile memory |
| Operating Temperature | -40°C to +85°C |
| Tape-and-Reel Quantity | 4,000 units with -T suffix |
Key Differentiators
- Flexible dual-output phase allocation (vs Generic single-output PWM controller)
- Retained hardware configuration (vs Controller requiring an external setup sequence)
- Load-dependent phase management (vs Fixed-phase multiphase design)
Design Notes
Follow the Renesas ISL68137 datasheet layout and exposed-pad recommendations without deviation. Place the 48-lead QFN close to its associated control and communication circuitry, use a continuous ground reference where directed, and connect the exposed thermal pad according to the manufacturer drawing. High-current gate-drive and phase-current-sensing loops should remain compact to minimize switching-node coupling and control-loop delay.
Validate each configured X+Y phase assignment across maximum load, startup, shutdown, line loss, short circuit, and overcurrent conditions. A 7+0 arrangement and a 3+3 arrangement impose different current-sharing and control requirements even though both use the same controller. Confirm every external gate driver, MOSFET, inductor, and current sensor against the verified supply, timing, and fault limits in the manufacturer datasheet.
Do not treat a similar multi-output controller as pin-compatible without an exact pin table and digital-interface comparison. The supplied cross-reference results identify LTC389x and LM5170 or LM5175 families only as functionally similar. AVSBus behavior, pin-strap defaults, nonvolatile configuration, fault polarity, exposed-pad connection, and enable sequencing must match before a replacement is approved.
Estimate controller dissipation from verified supply voltage and quiescent-current limits after obtaining those values from the datasheet. Check the QFN exposed pad against the manufacturer's thermal model, surrounding copper, airflow, and worst-case ambient temperature. The supplied snippets do not provide thermal resistance or controller supply current, so no numerical junction-temperature estimate is asserted here.
Compliance Information
The Renesas part-number table identifies the package as RoHS compliant and states that the product uses a special Pb-free material set. The supplied data does not establish REACH, halogen-free, conflict-minerals, or automotive qualification status.
