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Renesas ISL91302BIIZ-T
- Part No.:
- ISL91302BIIZ-T
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
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ISL91302BIIZ-T.pdf
- Description:
- IC REG MULTI PWR RAIL PHASE BUC
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Product details
Overview
ISL91302BIIZ-T 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 0.3V–2.0V programmable output voltage via I²C/SPI, features R5 modulator technology for ultra-fast transient response (e.g., 50A/µs per phase), and achieves 94.7% peak efficiency at 3.8VIN/1.8VOUT. It targets CPU/GPU core power in mobile applications requiring high-density, dynamically scalable rail generation.
For engineers reviewing the ISL91302BIIZ-T datasheet, ISL91302BIIZ-T pinout, ISL91302BIIZ-T application, or ISL91302BIIZ-T equivalent, key selection criteria include its factory OTP-configurable phase assignment, ±0.7% system accuracy with remote sensing, 2–6MHz programmable PWM frequency, integrated ADC telemetry (voltage/current/temperature), and support for DVS slew rates up to ±3mV/µs across dual independent outputs.
Technical Context
The ISL91302BIIZ-T implements Renesas' proprietary R5 modulator architecture, enabling seamless transitions between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) without external compensation while maintaining loop stability and sub-1µs load-step response. Its four power stages-each with 23mΩ high-side and 9mΩ low-side MOSFETs-are assignable across two independent buck controllers to realize flexible output configurations.
Configuration is performed via factory-programmed OTP settings, with runtime control through SPI or I²C interfaces supporting dynamic voltage scaling (DVS), fault reporting (UV/OV/OC/OT), and telemetry readback. The device integrates an internal 10-bit ADC for auxiliary inputs and current-sense offset correction, enabling closed-loop monitoring of VOUT, IOUT, and die temperature with ±10% current-sense accuracy at 500mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Factory OTP-selectable: 4-phase single output (4+0), 3-phase + 1-phase dual output (3+1), or 2-phase + 2-phase dual output (2+2) |
| Per-Phase Output Current | 5A continuous - enables compact high-current rails without external MOSFETs or discrete drivers |
| Output Voltage Range | 0.3V to 2.0V (via 10-bit digital control) - supports modern SoC core and I/O rail requirements |
| Switching Frequency | 2MHz to 6MHz (OTP-programmable) - allows optimization of size vs. efficiency for Li-ion battery input (2.5–5.5V) |
| System Accuracy | ±0.7% over –10°C to +85°C with remote voltage sensing - ensures stable operation under thermal and layout variation |
| Transient Response | 50A/µs per phase load step capability - maintains regulation during CPU/GPU burst activity without excessive bulk capacitance |
| Quiescent Current | <1µA in shutdown (EN = 0V); 22µA in idle 4+0 mode - extends battery life in always-on subsystems |
Pinout & Package
ISL91302BIIZ-T uses a 2.551mm × 3.670mm, 54-ball WLCSP package with 0.4mm pitch, optimized for ultra-thin mobile PCBs. Ball mapping follows JEDEC standard (balls down, A1 top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, B1 | PVIN_A | Power input for Phase A high-side switch - requires local 10µF ceramic decoupling |
| A2–C2 | PH_A | Switching node for Phase A - connects directly to inductor and high-frequency output capacitor |
| A3–C3 | PGND_A | Power ground return for Phase A - must be tied to dedicated low-impedance PGND plane |
| D1 | EN | Master enable input (NMOS threshold) - asserts internal reference and controller startup sequence |
| E6, F1 | VOUT1, RTN1 | Remote sense inputs for Buck #1 - enable accurate regulation despite PCB IR drop |
| E1, F1 | VOUT2, RTN2 | Remote sense inputs for Buck #2 - allow independent feedback loop calibration per output |
| F3 | VIO | I/O supply (1.7–1.8V) - powers SPI/I²C interface and GPIO logic; separate from analog AVIN |
| G1 | AVIN | Analog supply (2.5–5.5V) - powers bandgap, ADC, and internal regulators; filtered via AVIN_FILT |
| H1, J1 | PVIN_C | Power input for Phase C - assigned based on OTP configuration (e.g., 3+1 or 2+2) |
| G5–J5 | PH_D | Switching node for Phase D - used in all configurations except 2+2 where PH_C/PH_D serve Buck #2 |
Key Features
| Feature | Design Value |
|---|---|
| R5 Modulator Architecture | Enables <1µs transient recovery and eliminates need for external loop compensation components |
| Integrated Power Stages | Four 5A-capable phases with 23mΩ/9mΩ HS/LS MOSFETs - reduces BOM count and solution footprint by >40% vs. discrete controllers |
| Dual Independent DVS | Programmable slew rate (±3mV/µs) per output - supports coordinated voltage scaling for heterogeneous SoC domains |
| Telemetry ADC | Internal 10-bit ADC monitors VOUT, IOUT, TDIE, and two auxiliary inputs - enables real-time health monitoring without external sensors |
| Configurable Serial Interface | I²C (3.4MHz) or SPI (26MHz) with pin-mappable MPIOs - supports flexible host processor integration and debug access |
| Comprehensive Protection | Hardware-based UV/OV/OC/OT detection with latch-off or retry behavior - prevents damage during fault conditions without firmware intervention |
Applications
| Smartphone Application Processor Core Power | FPGA Core & I/O Bank Power |
|---|---|
|
Use Scenario: Supplying dynamic voltage rails to ARM Cortex-A7x clusters and GPU cores during burst-mode execution. IC Role / Device Role / Timing Role: Dual-output 3+1 configuration delivering 1.1V@8A (3-phase) and 0.8V@3A (1-phase) with synchronized DVS. Use Value: Achieves 94.7% efficiency at 3.8VIN/1.1VOUT and sustains 50A/µs load transients - eliminating need for large bulk capacitors and reducing PCB area by 35%. |
Use Scenario: Providing independently regulated core (0.85V) and I/O (1.8V) rails to Xilinx Zynq UltraScale+ MPSoC. IC Role / Device Role / Timing Role: 2+2 configuration with remote sensing on both outputs to compensate for FPGA package and board-level IR drop. Use Value: ±0.7% system accuracy ensures timing margin compliance; integrated ADC telemetry enables runtime thermal derating of FPGA logic resources. |
| Industrial MPU Power (e.g., i.MX 8M) | Human Machine Interface (HMI) Display Subsystem |
|
Use Scenario: Generating 1.0V@6A core and 3.3V@2A I/O rails for NXP i.MX 8M Nano in fanless edge gateways. IC Role / Device Role / Timing Role: 4+0 configuration with OTP-set 4MHz switching frequency to minimize EMI in noise-sensitive industrial environments. Use Value: Low IQ (<1µA shutdown, 22µA idle) extends backup battery life; thermal warning alert (85°C) triggers proactive fan control before throttling. |
Use Scenario: Powering AMOLED display driver ICs and touch controller in automotive infotainment panels. IC Role / Device Role / Timing Role: 2+2 configuration with independent DVS on each rail to match display brightness and frame-rate modulation. Use Value: 2.551mm × 3.670mm WLCSP fits within tight bezel constraints; ±3mV/µs DVS slew rate synchronizes voltage ramp with display refresh timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91301B | 42-ball 6×7 WLCSP; max 4A per phase; quad-output (1+1+1+1) only; no 4+0 or 3+1 modes | Targeted at lower-current, multi-rail systems (e.g., sensor hubs) rather than high-power CPU/GPU cores | Select ISL91301B only when needing four independent low-current rails (<4A) and smaller package footprint. |
| ISL91211B | Same 54-ball WLCSP; 5A per phase; quad-output (1+1+1+1); lacks R5 modulator - slower transient response (~5µs) | Suitable for fixed-voltage, non-DVS applications like memory I/O where fast load steps are not required | Choose ISL91211B if design prioritizes cost over dynamic performance and requires four independent 1-phase rails. |
Compared with ISL91301B and ISL91211B, the ISL91302BIIZ-T uniquely supports reconfigurable high-current phase grouping (4+0/3+1/2+2), delivers superior transient response via R5 modulation, and integrates full DVS control - making it the only option for scalable, high-efficiency mobile SoC power delivery.
Availability
ISL91302BIIZ-T is available at Aetrix Electronics and suitable for smartphone application processor core power, FPGA core & I/O bank power, and industrial MPU power requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91302BIIZ-T 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 embedded solutions for automotive, industrial, and consumer markets.
The ISL91302B belongs to Renesas' high-density mobile PMIC product line, designed specifically for dynamic, multi-rail power delivery in space-constrained portable devices with stringent efficiency and transient response requirements.
FAQ
What output configurations does the ISL91302BIIZ-T support?
The ISL91302BIIZ-T 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 the four integrated power stages to one or two buck controllers, enabling flexible rail generation for CPU, GPU, or FPGA applications without changing hardware. The ISL91302BIIZ-T's pinout and internal routing are identical across all modes - only OTP programming determines phase allocation.
How does the R5 modulator in the ISL91302BIIZ-T improve transient response?
The R5 modulator in the ISL91302BIIZ-T delivers ultra-fast transient response by enabling sub-1µs recovery from 50A/µs load steps per phase, achieved through predictive control and seamless CCM/DCM transitions without external compensation. Unlike conventional voltage-mode or current-mode controllers, the R5 architecture continuously monitors phase current and output voltage slope to adjust duty cycle in real time - eliminating the need for large output capacitance and ensuring regulation stability under rapid SoC workload changes. This behavior is intrinsic to the ISL91302BIIZ-T's silicon design.
Can the ISL91302BIIZ-T perform independent dynamic voltage scaling on both outputs?
Yes, the ISL91302BIIZ-T supports fully independent Dynamic Voltage Scaling (DVS) on both outputs with programmable slew rates from ±0.5mV/µs to ±3mV/µs. Each buck controller has dedicated DVS registers accessible via I²C or SPI, allowing asynchronous voltage ramps - for example, lowering VOUT1 for CPU cores while maintaining VOUT2 for GPU memory. The ISL91302BIIZ-T also supports global DVS using GPIO pins (DVS_PIN0/DVS_PIN1) for hardware-triggered scaling events, verified in datasheet Table 2 pin mode 0x3 and 0x4.
What is the accuracy of remote voltage sensing on the ISL91302BIIZ-T?
The ISL91302BIIZ-T achieves ±0.7% system output voltage accuracy over –10°C to +85°C using remote sensing (VOUT1/RTN1 and VOUT2/RTN2), which compensates for PCB trace resistance between the PMIC and load. This specification includes errors from the internal error amplifier, feedback divider, and ADC reference - validated under CCM operation with VOUT > 0.6V. For sub-0.6V outputs, accuracy degrades to ±4mV (±5.5mV over temperature), as confirmed in FN8828 Rev.3.01 Section 2.4 "Buck Regulation".
Does the ISL91302BIIZ-T require external MOSFETs or diodes?
No, the ISL91302BIIZ-T integrates all power switches: four high-side MOSFETs (23mΩ typical rDS(ON)) and four low-side MOSFETs (9mΩ typical rDS(ON)). No external MOSFETs, Schottky diodes, or gate drivers are needed. The device operates as a complete synchronous buck solution - only external inductors, input/output capacitors, and optional RC snubbers are required. This integration is explicitly stated in the datasheet overview and confirmed in the "Features" section on page 1.
ISL91302BIIZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ISL91302BIIZ-T FAQ
1.How can I place an order for ISL91302BIIZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91302BIIZ-T 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-T reliable?
The price and inventory of ISL91302BIIZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91302BIIZ-T is usually 5 days.
3.What payment methods are accepted for ISL91302BIIZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91302BIIZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91302BIIZ-T?
ISL91302BIIZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91302BIIZ-T 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-T?
For technical support, including ISL91302BIIZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91302BIIZ-T requirements.
6.How does Aetrix verify that ISL91302BIIZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91302BIIZ-T 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-T meets industry standards.
7.What is the process for return or replacement of ISL91302BIIZ-T?
All ISL91302BIIZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91302BIIZ-T, 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-T part is unused and in its original packaging.
Return procedure for ISL91302BIIZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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