My Inquiry
My Account
Renesas ISL91211BIIZ-T
- Part No.:
- ISL91211BIIZ-T
- Manufacturer:
- Renesas
- Package:
- 54-UFBGA, WLCSP
- Datasheet:
-
ISL91211BIIZ-T.pdf
- Description:
- IC REG BUCK PROG QUAD 54WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,493
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL91211BIIZ-T from Renesas is a quad-output, 4-phase programmable PMIC optimized for high-efficiency synchronous buck conversion in space-constrained mobile and AI processor applications. It delivers up to 5A per phase, supports I²C/SPI configuration, features ±0.7% system output accuracy with remote sensing, and operates from 2.5V–5.5V input across –40°C to +85°C.
For engineers reviewing the ISL91211BIIZ-T datasheet, ISL91211BIIZ-T pinout, ISL91211BIIZ-T application, or ISL91211BIIZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed quad-output 1+1+1+1 phase reconfiguration, real-world efficiency data (94.7% at 3.8VIN/1.8VOUT), and accurate alternative selection guidance for client SSD, AR/VR, and AI SoC power designs.
Technical Context
The ISL91211BIIZ-T implements four independent buck controllers with configurable phase assignment-enabling true 1-phase-per-output operation (VOUT1–VOUT4) using PH_D, PH_B, PH_A, and PH_C switching nodes. Its R5 proprietary control architecture eliminates external compensation, enables ultra-fast transient response (50A/µs per phase), and ensures seamless DCM/CCM transitions under dynamic load conditions.
It integrates low-RDS(ON) MOSFETs (HS: 23mΩ, LS: 9mΩ), supports programmable PWM frequency (2–6MHz), and delivers independent Dynamic Voltage Scaling (DVS) per output with 3mV/µs slew rate. Remote voltage sensing (RTN1–RTN4) and ±0.7% system accuracy are maintained across temperature and load via integrated bandgap reference and precision feedback dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Quad output (1+1+1+1 phase); each output independently configurable and voltage-programmable |
| Per-Phase Current | 5A continuous; enables compact high-power delivery without external current sharing circuitry |
| Input Voltage Range | 2.5V–5.5V on AVIN/PVIN; supports single-cell Li-ion and USB PD input rails |
| Output Voltage Range | 0.3V–2.0V (configurable in 1.2–2.0mV steps); covers core, I/O, and memory rail requirements for AI processors |
| System Accuracy | ±0.7% over –40°C to +85°C with remote sensing; ensures stable operation under thermal and PCB IR-drop variations |
| Switching Frequency | Programmable 2–6MHz; allows optimization of inductor size (e.g., 220nH) and EMI performance |
| Efficiency | 94.7% at 3.8VIN/1.8VOUT, full load; reduces thermal load in sealed mobile enclosures |
Pinout & Package
ISL91211BIIZ-T uses a 2.551mm × 3.670mm, 54-ball WLCSP package with 0.4mm pitch, designed for ultra-dense mobile PCB layouts and compatible with standard Pb-free reflow profiles (J-STD-020 MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT1–VOUT4 | Output voltage sense inputs | Enable remote feedback for precise regulation; VOUT4 and RTN4 are active only in ISL91211B configuration |
| RTN1–RTN4 | Remote ground sense inputs | Compensate for PCB trace resistance between IC and load; critical for <1% accuracy at high current |
| PH_A–PH_D | Switching node outputs | Drive external inductors; PH_A, PH_B, PH_C, PH_D assigned one-to-one to VOUT1–VOUT4 in quad mode |
| AVIN, PVIN_A–D | Analog and phase power inputs | Dual-supply architecture isolates noise-sensitive analog circuitry from high-current power stages |
| MPIO0–MPIO3, GPIO0–GPIO2 | Multipurpose and general-purpose I/O | Configurable for I²C (SCL/SDA), SPI, PGOOD, DVS, or enable signals-no additional level-shifting required |
Key Features
| Feature | Design Value |
|---|---|
| R5 proprietary control architecture | Enables ultra-fast transient response (50A/µs per phase) and eliminates need for external compensation components |
| Independent Dynamic Voltage Scaling (DVS) | Each output supports programmable slew rate (3mV/µs) and voltage stepping for AI/SoC DVFS sequences |
| Integrated low-RDS(ON) MOSFETs | HS = 23mΩ, LS = 9mΩ per phase; reduces conduction loss and enables >94% peak efficiency at 5A |
| I²C/SPI dual-interface support | Configurable via IO_PINMODE register; supports 3.4MHz I²C and 26MHz SPI for flexible host integration |
| Comprehensive fault protection | Hardware-based UV/OV/OC/OT detection with short-circuit protection and 143°C thermal shutdown (55°C hysteresis) |
Applications
| AI Accelerator Power | Client SSD Power |
|---|---|
Use Scenario: Powering heterogeneous compute units (NPU, GPU, memory subsystems) in edge AI SoCs requiring rapid, independent voltage scaling. IC Role / Device Role / Timing Role: Quad-output PMIC delivering four precisely regulated, dynamically scaled rails (e.g., 0.75V core, 0.9V NPU, 1.1V memory, 1.8V I/O) with synchronized sequencing. Use Value: Enables sub-10µs DVS transitions and maintains ±0.7% accuracy across all rails during simultaneous load transients up to 50A/µs. |
Use Scenario: Supplying NVMe SSD controller, NAND flash, and DRAM buffers in thin-client and enterprise storage modules. IC Role / Device Role / Timing Role: Single-chip solution generating VCC (1.2V), VPP (3.3V), VDDQ (1.35V), and auxiliary bias rails with tight cross-regulation. Use Value: Reduces BOM count by replacing four discrete DC/DC converters; achieves 94.7% efficiency at 3.8VIN/1.8VOUT to extend thermal margin in fanless enclosures. |
| AR/VR Display Subsystem | Drone Flight Controller |
Use Scenario: Powering micro-OLED display drivers, image signal processors, and motion sensor hubs in battery-powered AR glasses. IC Role / Device Role / Timing Role: Delivering low-noise, low-ripple rails (e.g., 1.0V ISP, 1.8V display interface, 2.8V sensor bias) with Diode Emulation mode for ultra-low IQ. Use Value: Achieves <1µA quiescent current in light-load DCM mode while maintaining fast wake-up (<1.4ms boot-up time) for responsive UX. |
Use Scenario: Managing power for flight controller SoC, IMU, radio transceiver, and camera module in compact UAV platforms. IC Role / Device Role / Timing Role: Providing isolated, sequenced outputs for digital logic (1.2V), analog sensors (3.3V), RF front-end (2.5V), and camera interface (1.8V). Use Value: Supports 2.5V–5.5V input range to accommodate LiPo battery discharge curve; integrated watchdog reset (WDOG_RST) enhances flight safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91211AIIZ-T | Triple-output (2+1+1 phase) variant; VOUT4/RTN4 internally shorted to GND; identical pinout and package | Used where only three regulated rails are needed (e.g., smartphone AP + memory + I/O), not quad-rail AI SoCs | Select ISL91211AIIZ-T only when quad output is unnecessary-reduces software complexity and avoids unused pins. |
| ISL91301BIIZ-T | 42-ball WLCSP (smaller footprint), 4A per phase, triple output (1+1+1+1 not supported); lacks R5 control loop and remote sensing on all outputs | Suitable for cost-sensitive client devices with lower current demand (<4A/rail) and relaxed accuracy (±1.5%) | Choose ISL91301BIIZ-T only if 4A/rail suffices and ±0.7% accuracy with RTN sensing is not required. |
Compared with ISL91211BIIZ-T, ISL91211AIIZ-T offers identical layout compatibility but omits VOUT4 functionality, while ISL91301BIIZ-T trades accuracy, transient performance, and quad-rail capability for reduced size and cost-making ISL91211BIIZ-T the only option supporting 5A/rail, ±0.7% accuracy, and full 1+1+1+1 reconfiguration.
Availability
ISL91211BIIZ-T is available at Aetrix Electronics and suitable for AI accelerator modules, client SSDs, AR/VR headsets, and drone flight controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91211BIIZ-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, and embedded solutions for automotive, industrial, and computing markets.
The ISL91211B belongs to Renesas' high-density PMIC product line, engineered specifically for advanced mobile and AI processors demanding quad-rail, multi-phase, digitally configurable power with minimal footprint and highest efficiency.
FAQ
What is the maximum continuous output current per phase for the ISL91211BIIZ-T?
The ISL91211BIIZ-T supports up to 5A continuous output current per phase across its four buck controllers. This rating is specified for 2.5V–5.5V input voltage and applies to all phases (PH_A through PH_D) under recommended operating conditions with adequate thermal management. The device sustains this current in both CCM and DCM modes, with built-in overcurrent protection limiting peak current to 8A per phase.
Does the ISL91211BIIZ-T support independent Dynamic Voltage Scaling (DVS) on all four outputs?
Yes, the ISL91211BIIZ-T supports fully independent DVS on all four outputs (VOUT1–VOUT4). Each output can be programmed with unique voltage targets and slew rates (up to 3mV/µs) via I²C or SPI. Pin mode configurations (e.g., IO_PINMODE = 0x7) assign dedicated DVS control pins per buck, enabling simultaneous but asynchronous voltage transitions required for AI SoC power states.
What package type and dimensions does the ISL91211BIIZ-T use?
The ISL91211BIIZ-T uses a 54-ball Wafer-Level Chip-Scale Package (WLCSP) measuring 2.551mm × 3.670mm 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 high-density mobile PCBs where board area is constrained.
How does the ISL91211BIIZ-T achieve ±0.7% system output accuracy?
The ISL91211BIIZ-T achieves ±0.7% system output accuracy across –40°C to +85°C through integrated high-precision bandgap reference, on-die feedback resistors with <0.1% matching, and four dedicated remote sense inputs (RTN1–RTN4). These features compensate for PCB trace resistance and thermal drift, ensuring accuracy remains within specification even under 5A load and 50°C ambient rise.
Can the ISL91211BIIZ-T operate with only I²C communication, or is SPI required?
The ISL91211BIIZ-T supports both I²C and SPI communication natively. By default (IO_PINMODE = 0x0), MPIO0–MPIO3 and GPIO0–GPIO1 function as I²C clock and data lines, enabling full register access at up to 3.4MHz. SPI is optional and activated via pin mode configuration-no hardware changes are needed to switch interfaces, simplifying host processor integration.
ISL91211BIIZ-T 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:
- 4
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 1.2V
- Current - Output:
- 5A, 5A, 5A, 5A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 54-WLCSP (2.55x3.67)
ISL91211BIIZ-T FAQ
1.How can I place an order for ISL91211BIIZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91211BIIZ-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 ISL91211BIIZ-T reliable?
The price and inventory of ISL91211BIIZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91211BIIZ-T is usually 5 days.
3.What payment methods are accepted for ISL91211BIIZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91211BIIZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91211BIIZ-T?
ISL91211BIIZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91211BIIZ-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 ISL91211BIIZ-T?
For technical support, including ISL91211BIIZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91211BIIZ-T requirements.
6.How does Aetrix verify that ISL91211BIIZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91211BIIZ-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 ISL91211BIIZ-T meets industry standards.
7.What is the process for return or replacement of ISL91211BIIZ-T?
All ISL91211BIIZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91211BIIZ-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 ISL91211BIIZ-T part is unused and in its original packaging.
Return procedure for ISL91211BIIZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL91211BIIZ-T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
