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Renesas ISL91301BIIZ-TR5946
- Part No.:
- ISL91301BIIZ-TR5946
- Manufacturer:
- Renesas
- Package:
- 42-UFBGA, WLCSP
- Datasheet:
-
ISL91301BIIZ-TR5946.pdf
- Description:
- IC REG BUCK PROG QUAD 42WLCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL91301BIIZ-TR5946 from Renesas is a quad-output, 4-phase programmable Power Management IC (PMIC) optimized for high-efficiency synchronous buck conversion in space-constrained mobile and AI processor applications. It delivers up to 4A per phase across four independent outputs, supports I²C/SPI configuration, features ±0.7% system output accuracy with remote sensing, and operates from 2.8V–5.5V input when VIN_SEL = AVIN. It powers core voltage rails in smartphones and AI accelerators requiring fast DVS and tight transient response.
For engineers reviewing the ISL91301BIIZ-TR5946 datasheet, ISL91301BIIZ-TR5946 pinout, ISL91301BIIZ-TR5946 application, or ISL91301BIIZ-TR5946 equivalent, key selection criteria include its 42-ball WLCSP package, 1+1+1+1 output configuration, 4MHz nominal switching frequency, programmable 0.3V–2.0V output range per rail, and integrated R5 control architecture enabling 50A/µs load-step response without external compensation.
Technical Context
The ISL91301BIIZ-TR5946 implements Renesas' proprietary R5 control architecture, delivering ultra-fast transient response (e.g., 4A load step in <160ns), seamless DCM/CCM transitions, and no need for external loop compensation. Its four independent buck controllers are reconfigurable into a true quad single-phase topology-each output driven by one dedicated power stage (PH_A, PH_B, PH_C, PH_D)-with separate remote sense inputs (RTN1–RTN4) and feedback pins (VOUT1–VOUT4).
It supports dual communication protocols via MPIO/GPIO pins: I²C (up to 3.4MHz) and SPI (up to 26MHz), with configurable pin modes including individual PGOOD outputs, hardware DVS control, and parallel data lines. The device integrates low-RDS(ON) MOSFETs (55mΩ HS / 14mΩ LS), programmable PWM frequency (2–6MHz), and automatic Diode Emulation/Pulse Skipping for light-load efficiency optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Quad output (1+1+1+1 phase), each output independently controllable and remotely sensed |
| Per-Phase Output Current | 4A continuous (VIN_SEL = AVIN, 2.8V–5.5V input); enables compact 4-rail power delivery for multi-core SoCs |
| Output Voltage Range | 0.3V–2.0V per rail (10-bit programmable, 2mV step size at highest range); supports core, I/O, and auxiliary rail scaling |
| Switching Frequency | Programmable 2MHz–6MHz (typ. 4MHz); allows use of sub-300nH inductors and reduces solution footprint |
| System Accuracy | ±0.7% over –10°C to +85°C with remote sensing; ensures stable operation under PCB IR drop and thermal drift |
| Load Transient Response | 50A/µs per phase slew rate capability; maintains <±62mV deviation during 4A/160ns steps (single-phase test) |
| Quiescent Current | 17µA (all bucks disabled, EN high); extends battery life in always-on subsystems |
Pinout & Package
ISL91301BIIZ-TR5946 uses a 2.570mm × 2.919mm, 42-ball WLCSP package with 0.4mm pitch, designed for ultra-thin mobile PCBs and compatible with standard Pb-free reflow profiles (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PH_A, PH_B, PH_C, PH_D | Switching node outputs | Four independent high-frequency buck switch nodes; each drives one output rail in 1+1+1+1 mode |
| VOUT1–VOUT4 | Feedback inputs | Remote voltage sense inputs for each output; enable precise regulation despite PCB trace resistance |
| RTN1–RTN4 | Remote ground sense inputs | Return path references for each VOUT pin; critical for ±0.7% accuracy under load-induced ground bounce |
| MPIO0–MPIO3, GPIO0–GPIO1 | Configurable digital I/O | Support I²C (SCL/SDA), SPI (SCK/MOSI/MISO/SS_B), PGOOD, DVS, or hardware enable functions depending on pin mode register setting |
| VIN_SEL | Input voltage range selector | Tie to AVIN for 2.8V–5.5V input / 4A-phase operation; tie to GND for 2.5V–5.5V / 3A-phase mode |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary R5 control architecture | Eliminates need for external compensation components while achieving <10µs recovery from 8A load transients |
| Independent Dynamic Voltage Scaling (DVS) | Each of four outputs supports programmable slew rates (e.g., 3mV/µs) for coordinated core voltage sequencing in AI processors |
| Integrated low-RDS(ON) power stages | 55mΩ high-side + 14mΩ low-side MOSFETs reduce conduction loss and thermal footprint vs discrete solutions |
| Multi-protocol serial interface | I²C and SPI selectable via MPIO1; enables flexible integration with ARM-based host controllers or FPGA management systems |
| Comprehensive fault protection | Dedicated OV/UV/OC/OT detection per buck with latched or auto-retry response; prevents system-level damage during rail faults |
Applications
| Smartphone Application | AI Accelerator Power |
|---|---|
|
Use Scenario: Powering CPU, GPU, NPU, and memory I/O rails in flagship smartphones with dynamic workload scaling. IC Role / Device Role / Timing Role: Quad-output PMIC delivering independently controlled, fast-slewing voltages to heterogeneous compute units. Use Value: Enables simultaneous DVS across four rails with <±62mV transient deviation, reducing SoC power domain coupling and improving battery runtime. |
Use Scenario: Supplying multiple voltage domains (core, cache, interconnect, I/O) in edge AI inference accelerators. IC Role / Device Role / Timing Role: Primary power controller managing rail sequencing, real-time voltage adjustment, and fault reporting via I²C. Use Value: 4A-per-phase capability and 50A/µs transient response ensure stable operation during burst-mode AI workloads without external bulk capacitance overhead. |
| Optical Transceiver Module | Client SSD Power |
|
Use Scenario: Regulating bias and analog supply rails in high-speed 400G/800G optical modules with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Compact, high-frequency buck regulator providing low-noise, tightly regulated voltages to laser drivers and TIAs. Use Value: 4MHz switching and integrated MOSFETs minimize conducted EMI and allow use of small 0201/0402 passives in dense optical PCB layouts. |
Use Scenario: Delivering core (0.8V), I/O (1.2V), and cache (1.1V) rails in PCIe Gen4/Gen5 client SSDs with aggressive power cycling. IC Role / Device Role / Timing Role: Multi-rail PMIC supporting rapid power state transitions (PS0→PS4) and precise rail ramping during wake/sleep sequences. Use Value: Independent soft-start and programmable slew rates prevent current surges during SSD power-up, improving host controller compatibility and reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91301AIIZ-T | Triple-output (2+1+1 phase) variant; shares identical pinout, package, and register map but lacks VOUT4/RTN4 functionality | Suitable only where three regulated rails suffice; cannot support fourth independent domain like AI accelerator I/O or DDR termination | Select ISL91301AIIZ-T only if design requires exactly three outputs and benefits from higher per-rail current (8A on VOUT1 via 2-phase) |
| ISL91211BII-T | 54-ball WLCSP, 5A-per-phase capability, same 1+1+1+1 topology; wider 2.5V–5.5V input range (no VIN_SEL dependency) | Higher current headroom and larger package accommodate thermally demanding AI SoCs; not pin-compatible due to 54-ball layout | Choose ISL91211BII-T when >4A per rail is required and board layout allows 6×9mm footprint; not a drop-in replacement |
Compared with ISL91301AIIZ-T, ISL91301BIIZ-TR5946 adds full quad-rail independence at identical footprint and control interface, while ISL91211BII-T trades pin compatibility for higher current and simplified input range-but demands PCB redesign.
Availability
ISL91301BIIZ-TR5946 is available at Aetrix Electronics and suitable for smartphone power delivery, AI accelerator subsystems, optical transceiver modules, and client SSD designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ISL91301BIIZ-TR5946 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog power devices, and embedded solutions for automotive, industrial, and consumer markets.
The ISL91301B belongs to Renesas' high-density, multi-output PMIC product line engineered for advanced mobile and AI processors requiring ultra-small form factor, fast dynamic response, and software-configurable power sequencing.
FAQ
What is the maximum per-phase output current supported by the ISL91301BIIZ-TR5946?
The ISL91301BIIZ-TR5946 supports up to 4A per phase when VIN_SEL is tied to AVIN and the input voltage ranges from 2.8V to 5.5V. This rating applies to all four independent buck stages (PH_A through PH_D) in its default 1+1+1+1 configuration. At 2.5V–5.5V input (VIN_SEL = GND), the per-phase limit reduces to 3A. These values are validated across the full –40°C to +85°C operating temperature range.
Does the ISL91301BIIZ-TR5946 require external compensation components?
No, the ISL91301BIIZ-TR5946 does not require external compensation components. Its proprietary R5 control architecture provides inherent loop stability across all operating conditions-including varying input voltage, output load, and temperature-without needing external RC networks. This simplifies design, reduces BOM count, and improves reliability compared to traditional voltage-mode or current-mode controllers.
How many independent voltage rails can the ISL91301BIIZ-TR5946 regulate simultaneously?
The ISL91301BIIZ-TR5946 regulates four independent voltage rails simultaneously-VOUT1, VOUT2, VOUT3, and VOUT4-each with dedicated remote sense (RTN1–RTN4), feedback (VOUT1–VOUT4), and switching node (PH_A–PH_D) connections. All four outputs are fully programmable via I²C or SPI, support independent DVS, soft-start, and fault monitoring, making it ideal for complex SoC power architectures.
What communication interfaces does the ISL91301BIIZ-TR5946 support?
The ISL91301BIIZ-TR5946 supports both I²C (up to 3.4MHz) and SPI (up to 26MHz) interfaces using its MPIO and GPIO pins. Interface selection is controlled by the MPIO1 pin level (low = SPI, high = I²C). Additional pin modes enable PGOOD reporting, hardware DVS control, or parallel data transfer-configurable via internal registers without changing physical connections.
What package type and dimensions does the ISL91301BIIZ-TR5946 use?
The ISL91301BIIZ-TR5946 uses a 42-ball Wafer-Level Chip-Scale Package (WLCSP) measuring 2.570mm × 2.919mm with 0.4mm ball pitch. It is RoHS-compliant, Pb-free, and rated MSL3 per J-STD-020. The package supports standard reflow profiles and is optimized for ultra-thin mobile PCBs where height and area are constrained.
ISL91301BIIZ-TR5946 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 42-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 2V
- Current - Output:
- 3A, 4A
- Frequency - Switching:
- 2MHz ~ 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 42-WLCSP (2.57x2.92)
ISL91301BIIZ-TR5946 FAQ
1.How can I place an order for ISL91301BIIZ-TR5946 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91301BIIZ-TR5946 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL91301BIIZ-TR5946 reliable?
The price and inventory of ISL91301BIIZ-TR5946 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91301BIIZ-TR5946 is usually 5 days.
3.What payment methods are accepted for ISL91301BIIZ-TR5946?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91301BIIZ-TR5946 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91301BIIZ-TR5946?
ISL91301BIIZ-TR5946 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91301BIIZ-TR5946 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL91301BIIZ-TR5946?
For technical support, including ISL91301BIIZ-TR5946 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91301BIIZ-TR5946 requirements.
6.How does Aetrix verify that ISL91301BIIZ-TR5946 is sourced from the original manufacturer or authorized distributors?
All ISL91301BIIZ-TR5946 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL91301BIIZ-TR5946 meets industry standards.
7.What is the process for return or replacement of ISL91301BIIZ-TR5946?
All ISL91301BIIZ-TR5946 units undergo pre-shipment inspection (PSI). If there is an issue with ISL91301BIIZ-TR5946, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL91301BIIZ-TR5946 part is unused and in its original packaging.
Return procedure for ISL91301BIIZ-TR5946:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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