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Renesas ISL91302BIIZ-TR5931
- Part No.:
- ISL91302BIIZ-TR5931
- Manufacturer:
- Renesas
- Package:
- 54-UFBGA, WLCSP
- Datasheet:
-
ISL91302BIIZ-TR5931.pdf
- Description:
- IC REG BUCK PROG SGL/DL 54WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
ISL91302BIIZ-TR5931 from Renesas Electronics is a dual/single-output synchronous multiphase buck PMIC with four integrated power stages and two controllers, configurable as 4+0, 3+1, or 2+2 phase outputs. It delivers up to 5A per phase, supports 2.5V–5.5V input, achieves 94.7% peak efficiency at 3.8VIN/1.8VOUT, and integrates low RDS(ON) MOSFETs (23mΩ HS / 9mΩ LS) for mobile CPU/GPU core power.
For engineers reviewing the ISL91302BIIZ-TR5931 datasheet, ISL91302BIIZ-TR5931 pinout, ISL91302BIIZ-TR5931 application, or ISL91302BIIZ-TR5931 equivalent, key selection criteria include output configuration flexibility (4+0/3+1/2+2), ±0.7% system accuracy with remote sensing, OTP-programmable 2–6MHz PWM frequency, I²C/SPI programmability from 0.3V–2.0V, and fast DVS slew rate of ±3mV/µs.
Technical Context
The ISL91302BIIZ-TR5931 employs Renesas' proprietary R5 modulator architecture to enable ultra-fast transient response (e.g., 50A/µs per phase), seamless DCM/CCM transitions without external compensation, and robust loop stability. Its four independent power stages are dynamically assignable across two buck controllers to support 4-phase, 3+1-phase, or 2+2-phase topologies.
Configuration is factory-set via OTP and includes selectable features such as dynamic voltage scaling with programmable slew rate, voltage/current/temperature telemetry via integrated ADC with auxiliary inputs, and dual-interface support (I²C up to 3.4MHz, SPI up to 26MHz) for real-time telemetry and control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Factory OTP-configurable as 4+0, 3+1, or 2+2 phase; enables single-rail high-current or dual-rail independent regulation |
| Input Voltage Range | 2.5V to 5.5V on AVIN/PVIN; compatible with single-cell Li-ion and fixed 3.3V/5V rails |
| Output Current Capability | 5A per phase continuous; supports up to 20A total in 4-phase mode with proper thermal design |
| Efficiency | 94.7% peak at 3.8VIN/1.8VOUT (470nH inductor); high efficiency maintained across light-to-heavy loads via diode emulation |
| Output Voltage Range | 0.3V to 2.0V per output, digitally programmable in 1.2–2.0mV steps depending on feedback divider setting |
| Accuracy | ±0.7% system accuracy with remote voltage sensing; critical for tight-tolerance core supplies |
| Switching Frequency | OTP-programmable 2MHz to 6MHz; higher frequencies reduce inductor size but increase switching loss |
| Protection Features | UV/OV/OC/OT fault detection with short-circuit protection; thermal shutdown at +140°C ±10°C with +60°C hysteresis |
Pinout & Package
ISL91302BIIZ-TR5931 uses a 2.551mm × 3.670mm, 54-ball WLCSP package with 0.4mm pitch, optimized for ultra-compact mobile PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN_A–PVIN_D | Power stage input supply | Four independent input rails for each power stage; allows localized decoupling and current path optimization |
| PH_A–PH_D | Switching node output | High-frequency buck phase outputs; require low-inductance routing to inductors and ground planes |
| PGND_A–PGND_D | Power ground return | Dedicated ground connections per phase to minimize cross-talk and improve current sharing accuracy |
| VOUT1 / VOUT2 | Remote output voltage sense | Enables Kelvin sensing for ±0.7% regulation accuracy under load; must connect directly to load point |
| RTN1 / RTN2 | Remote ground sense | Completes Kelvin sensing loop; improves regulation accuracy by compensating for PCB trace IR drop |
| EN | Master chip enable | NMOS logic threshold input; asserts internal reference startup and controller calibration sequence |
| INT | Fault interrupt output | Open-drain signal indicating UV/OV/OC/OT events; requires external pull-up for host MCU monitoring |
| MPIO0–MPIO3 | Multipurpose I/O | Configurable as SPI/I²C interface pins or hardware DVS/PGOOD signals based on OTP pin mode register |
| GPIO0 / GPIO1 | General-purpose I/O | Supports hardware buck enable (EN_A/EN_B), global DVS control, or ADC input depending on pin mode |
Key Features
| Feature | Design Value |
|---|---|
| R5 Modulator Architecture | Delivers <500ns load transient recovery and eliminates need for external compensation components |
| Integrated Power Stages | Four monolithic buck stages with 23mΩ HS / 9mΩ LS MOSFETs reduce BOM count and solution footprint by >30% |
| Dynamic Voltage Scaling | Independent DVS per output with programmable ±3mV/µs slew rate for processor DVFS compliance |
| Telemetry Interface | On-chip 10-bit ADC monitors voltage, current, and temperature with auxiliary ADC inputs for system-level health monitoring |
| Flexible Serial Control | I²C (3.4MHz) and SPI (26MHz) interfaces support real-time configuration, telemetry readback, and fault logging |
| Thermal Management | Programmable thermal warning (+85°C) and shutdown (+140°C) with hysteresis prevent thermal runaway in sealed enclosures |
Applications
| Smartphone Application Processor Core Power | FPGA Core and Auxiliary Rail Power |
|---|---|
Use Scenario: Supplying dynamic voltage to application processor cores (e.g., ARM Cortex-A series) during DVFS transitions. IC Role / Device Role / Timing Role: Dual-output 3+1 configuration provides independent 0.7–1.4V core rail and 1.8V GPU/memory rail with synchronized sequencing. Use Value: ±0.7% remote-sense accuracy ensures stable operation at sub-1V nodes; 3mV/µs DVS slew meets ARM PSCI timing requirements. | Use Scenario: Delivering tightly regulated 0.85V core and 1.2V I/O rails to Xilinx Zynq or Intel Cyclone FPGA platforms. IC Role / Device Role / Timing Role: Configured as 2+2 dual-output mode with independent soft-start and power-good signaling for safe FPGA configuration. Use Value: Integrated current sensing and telemetry enable real-time FPGA power rail margining and thermal derating without external sensors. |
| Industrial MPU Power Supply | Human-Machine Interface (HMI) Display SoC Power |
Use Scenario: Powering ARM-based industrial MPUs (e.g., NXP i.MX8) in fanless edge gateways requiring extended temperature operation. IC Role / Device Role / Timing Role: 4+0 single-output mode delivers up to 20A at 1.0V with thermal warning alert at +85°C for predictive cooling control. Use Value: -40°C to +85°C ambient rating and 0.1µA quiescent current in shutdown mode extend battery life in remote deployments. | Use Scenario: Supporting display SoCs (e.g., Rockchip RK3399) in automotive infotainment panels with strict EMI and transient immunity requirements. IC Role / Device Role / Timing Role: 2+2 configuration powers CPU cluster and GPU separately, with independent DVS and fault reporting to HMI controller. Use Value: 2–6MHz programmable switching frequency allows EMI tuning to avoid AM/FM radio bands; integrated ADC monitors display backlight driver current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91302B22-EVZ | Evaluation board for 2+2 configuration; not a direct replacement IC | Used for prototyping dual-output designs only; lacks production-grade packaging and qualification | Select only for lab validation; not suitable for volume production or BOM substitution |
| ISL91301B | 42-ball WLCSP, quad-output (1+1+1+1), 4A per phase, no R5 modulator | Targeted at lower-current multi-rail systems (e.g., sensor hubs); lacks 5A phase capability and fast transient response | Choose when needing four independent rails below 4A; not suitable for high-current CPU/GPU core power |
Compared with ISL91302BIIZ-TR5931, ISL91301B offers more output rails but lower per-phase current and slower transient response, while ISL91302B22-EVZ is a development tool-not a functional alternative-requiring full redesign for production use.
Availability
ISL91302BIIZ-TR5931 is available at Aetrix Electronics and suitable for smartphone application processor core power, FPGA core rail delivery, and industrial MPU power supply requiring stable component supply across automotive-grade temperature ranges and long lifecycle support.
Supply support for ISL91302BIIZ-TR5931 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 management, and connectivity solutions for automotive, industrial, and consumer markets.
The ISL91302B product line delivers highly integrated, configurable multiphase buck regulators targeting space-constrained, high-efficiency mobile and embedded power applications with stringent transient and accuracy requirements.
FAQ
What output configurations does the ISL91302BIIZ-TR5931 support?
The ISL91302BIIZ-TR5931 supports three factory-OTP-configurable output topologies: 4-phase single output (4+0), 3-phase + 1-phase dual output (3+1), and 2-phase + 2-phase dual output (2+2). Each configuration assigns its four integrated power stages and two controllers differently to meet specific current, ripple, and sequencing requirements. The ISL91302BIIZ-TR5931 does not support triple or quad independent outputs - only the three defined modes.
What is the maximum continuous output current per phase for the ISL91302BIIZ-TR5931?
The ISL91302BIIZ-TR5931 delivers up to 5A continuous output current per phase across all supported configurations (4+0, 3+1, 2+2) under recommended operating conditions (2.5V–5.5V input, TA = –40°C to +85°C). This rating assumes proper PCB layout, thermal management, and inductor selection per Renesas' recommended parts list. The ISL91302BIIZ-TR5931 maintains this current capability regardless of phase count due to its integrated low-RDS(ON) MOSFETs (23mΩ HS / 9mΩ LS).
Does the ISL91302BIIZ-TR5931 support dynamic voltage scaling (DVS)?
Yes, the ISL91302BIIZ-TR5931 supports independent Dynamic Voltage Scaling (DVS) on both outputs with programmable slew rates from ±1mV/µs to ±3mV/µs. DVS is implemented via hardware pins (DVS1_0/DVS1_1 and DVS2_0/DVS2_1) or I²C/SPI commands, enabling precise voltage transitions required by ARM-based processors and FPGAs. The ISL91302BIIZ-TR5931's R5 modulator ensures stable regulation during DVS transitions without external compensation.
What serial interfaces does the ISL91302BIIZ-TR5931 support?
The ISL91302BIIZ-TR5931 supports both I²C (up to 3.4MHz) and SPI (up to 26MHz) interfaces through its MPIO0–MPIO3 pins, configurable via OTP pin mode register. These interfaces allow full read/write access to all registers, including output voltage, DVS settings, telemetry data, and fault status. The ISL91302BIIZ-TR5931 does not support PMBus or SMBus natively - only standard I²C and SPI protocols as defined in the FN8828 datasheet.
What is the package type and thermal performance of the ISL91302BIIZ-TR5931?
The ISL91302BIIZ-TR5931 uses a 54-ball, 0.4mm-pitch WLCSP package measuring 2.551mm × 3.670mm. Its thermal resistance is θJA = 42°C/W and θJC = 0.5°C/W, enabling efficient heat transfer to the PCB. The device operates from –40°C to +85°C ambient and shuts down at +140°C junction temperature with +60°C hysteresis. The ISL91302BIIZ-TR5931 requires no external heatsink in typical mobile applications when using recommended layout guidelines.
ISL91302BIIZ-TR5931 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 54-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1 or 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 2V
- Current - Output:
- 20A
- Frequency - Switching:
- 2MHz ~ 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 54-WLCSP (2.55x3.67)
ISL91302BIIZ-TR5931 FAQ
1.How can I place an order for ISL91302BIIZ-TR5931 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91302BIIZ-TR5931 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 ISL91302BIIZ-TR5931 reliable?
The price and inventory of ISL91302BIIZ-TR5931 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91302BIIZ-TR5931 is usually 5 days.
3.What payment methods are accepted for ISL91302BIIZ-TR5931?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91302BIIZ-TR5931 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91302BIIZ-TR5931?
ISL91302BIIZ-TR5931 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91302BIIZ-TR5931 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 ISL91302BIIZ-TR5931?
For technical support, including ISL91302BIIZ-TR5931 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91302BIIZ-TR5931 requirements.
6.How does Aetrix verify that ISL91302BIIZ-TR5931 is sourced from the original manufacturer or authorized distributors?
All ISL91302BIIZ-TR5931 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 ISL91302BIIZ-TR5931 meets industry standards.
7.What is the process for return or replacement of ISL91302BIIZ-TR5931?
All ISL91302BIIZ-TR5931 units undergo pre-shipment inspection (PSI). If there is an issue with ISL91302BIIZ-TR5931, 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 ISL91302BIIZ-TR5931 part is unused and in its original packaging.
Return procedure for ISL91302BIIZ-TR5931:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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