My Inquiry
My Account
Renesas ISL91211AIIZ-T
- Part No.:
- ISL91211AIIZ-T
- Manufacturer:
- Renesas
- Package:
- 54-UFBGA, WLCSP
- Datasheet:
-
ISL91211AIIZ-T.pdf
- Description:
- IC REG BUCK PROG TRPL 54WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,354
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL91211AIIZ-T from Renesas is a triple-output, 4-phase programmable PMIC optimized for high-power mobile and AI processor applications. It delivers up to 10A on VOUT1 (2-phase), 5A on VOUT2 (1-phase), and 5A on VOUT3 (1-phase) using integrated 23mΩ/9mΩ synchronous buck stages, supports I²C/SPI configuration, and operates from 2.5V–5.5V input with ±0.7% system output accuracy and remote voltage sensing.
For engineers reviewing the ISL91211AIIZ-T datasheet, ISL91211AIIZ-T pinout, ISL91211AIIZ-T application, or ISL91211AIIZ-T equivalent, this page provides verified phase configuration details, real-world efficiency curves at 4MHz switching, DVS slew rate (3mV/µs), thermal shutdown threshold (143°C), and WLCSP-54 package layout guidance - all critical for smartphone SoC power delivery and AR/VR module design.
Technical Context
The ISL91211AIIZ-T implements Renesas' proprietary R5 control architecture, enabling ultra-fast transient response (±65.5mV deviation under 50A/µs load step), seamless DCM/CCM transitions without external compensation, and automatic diode emulation at light loads. Its four independent buck controllers are reconfigurable into a 2+1+1 phase topology specifically for triple-output operation.
It integrates low-RDS(ON) MOSFETs (HS: 23mΩ, LS: 9mΩ), supports programmable PWM frequency from 2MHz to 6MHz, and features independent dynamic voltage scaling per output with 10-bit resolution and 1.2–2.0mV step size depending on feedback divider setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Triple output: 2+1+1 phase (VOUT1 = 10A, VOUT2/VOUT3 = 5A each) |
| Input Voltage Range | 2.5V–5.5V AVIN/PVIN - supports single-cell Li-ion and USB PD input rails |
| Switching Frequency | Programmable 2MHz–6MHz - enables use of <220nH inductors for compact layout |
| Output Voltage Range | 0.3V–2.0V (I²C-programmable in 1.2–2.0mV steps) - covers core, I/O, and memory rail requirements |
| System Accuracy | ±0.7% over –40°C to +85°C with remote sensing - ensures stable SoC operation under thermal stress |
| Efficiency Peak | 94.7% at 3.8VIN/1.8VOUT - minimizes thermal load in space-constrained modules |
| Quiescent Current | 17µA (all bucks disabled) - extends battery runtime in always-on subsystems |
Pinout & Package
ISL91211AIIZ-T uses a 2.551mm × 3.670mm, 54-ball WLCSP package with 0.4mm pitch, RoHS-compliant SnAgCu solder balls, and MSL3 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN_A, PVIN_B, PVIN_C, PVIN_D | Power stage input supplies | Independent 2.5V–5.5V inputs per phase bank - enables multi-rail input decoupling and fault isolation |
| PH_A, PH_B, PH_C, PH_D | Buck switching nodes | Four dedicated phase outputs - configured as PH_D+PH_C for VOUT1 (2-phase), PH_B for VOUT2, PH_A for VOUT3 |
| VOUT1–VOUT3, RTN1–RTN3 | Output voltage sense & remote ground | Three independent feedback paths with Kelvin sensing - eliminates PCB trace IR drop error |
| EN, INT, WDOG_RST | Control and status signals | Active-low enable, open-drain interrupt, and watchdog reset - supports sequenced startup and system-level fault recovery |
| MPIO0–MPIO3, GPIO0–GPIO2 | Configurable I/O | Supports I²C (default), SPI, PGOOD, DVS, or hardware enable modes - eliminates need for external logic |
Key Features
| Feature | Design Value |
|---|---|
| R5 Control Architecture | Eliminates external compensation components and achieves <1.4ms boot-up time with tight load regulation |
| Independent Dynamic Voltage Scaling | Per-output DVS with 3mV/µs slew rate - meets ARM big.LITTLE and AI accelerator voltage transition timing |
| Integrated Power Stages | 23mΩ HS / 9mΩ LS MOSFETs - reduces conduction loss and enables >94% efficiency at 5A/phase |
| Light-Load Efficiency Modes | Diode emulation + pulse skipping - maintains >85% efficiency down to 10mA load |
| Fault Protection Suite | UV/OV/OC/OT detection with latch-off or auto-retry - protects SoC and memory during brownout or short-circuit events |
Applications
| Smartphone Application Processor Power | AR/VR Display Module Supply |
|---|---|
|
Use Scenario: Powers application SoC (e.g., Qualcomm Snapdragon, MediaTek Dimensity) with three independent rails: CPU core (VOUT1), GPU (VOUT2), and LPDDR4X I/O (VOUT3). IC Role / Device Role / Timing Role: Triple-output PMIC managing dynamic voltage scaling, sequencing, and fast transient response for burst-mode workloads. Use Value: Delivers 10A peak current on VOUT1 with ±65.5mV load-step deviation - prevents SoC throttling during camera capture or gaming. |
Use Scenario: Supplies micro-OLED display driver ICs and IMU sensors in compact AR glasses requiring ultra-low EMI and minimal board area. IC Role / Device Role / Timing Role: High-frequency (4MHz) buck regulator minimizing inductor size while maintaining <100mV output ripple at 5A. Use Value: 2.55mm × 3.67mm WLCSP footprint saves >30% PCB area vs. discrete solutions - critical for sub-50g wearable form factors. |
| AI Accelerator Core Rail | Optical Transceiver Bias Supply |
|
Use Scenario: Provides dynamically scaled core voltage to edge AI inference chips (e.g., Google Edge TPU, Hailo-8) operating at 0.6–1.2V. IC Role / Device Role / Timing Role: Programmable DVS controller with 10-bit resolution and 3mV/µs slew rate synchronized to workload scheduler commands. Use Value: Enables 15% reduction in active power consumption via precise voltage/frequency scaling - extends battery life in portable AI devices. |
Use Scenario: Generates stable 3.3V and 5V bias rails for laser diode drivers and TIAs in 100G/400G optical modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR PMIC with remote sensing - rejects supply noise from adjacent high-speed SerDes lanes. Use Value: ±0.7% output accuracy and <10µVRMS noise floor ensure BER <10−12 in coherent optical transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91211BIIZ-T | Quad-output (1+1+1+1) configuration; VOUT4 enabled; identical pinout and package | Required when fourth independent rail (e.g., PCIe interface or auxiliary sensor) is needed | Select ISL91211BIIZ-T only if quad-rail support is mandatory; ISL91211AIIZ-T avoids unused VOUT4 routing complexity |
| ISL91301AIIZ-T | 42-ball WLCSP, 4A/phase limit, 2+1+1 topology; lower current capability and smaller package | Suitable for mid-tier mobile SoCs with <8A core demand and tighter cost targets | Choose ISL91301AIIZ-T for cost-sensitive designs where 5A/phase headroom is unnecessary |
Compared with ISL91211BIIZ-T, the ISL91211AIIZ-T saves PCB routing by disabling VOUT4/RTN4 (shorted to ground), while versus ISL91301AIIZ-T it delivers 25% higher per-phase current and superior transient response - making it optimal for flagship smartphone and AI edge platforms.
Availability
ISL91211AIIZ-T is available at Aetrix Electronics and suitable for smartphone SoC power delivery, AR/VR display modules, and AI accelerator core rail applications requiring stable component supply, full lifecycle support, and traceable sourcing.
Supply support for ISL91211AIIZ-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 connectivity solutions for automotive, industrial, and consumer markets.
The ISL91211A belongs to Renesas' high-density PMIC product line designed specifically for advanced mobile and AI processors - emphasizing ultra-small WLCSP packaging, multi-phase flexibility, and digital configurability via I²C/SPI.
FAQ
What is the maximum continuous output current supported by ISL91211AIIZ-T?
The ISL91211AIIZ-T supports up to 10A continuous on VOUT1 (configured as 2-phase), and 5A continuous on each of VOUT2 and VOUT3 (1-phase each). This is achieved using integrated 23mΩ high-side and 9mΩ low-side MOSFETs per phase, with thermal derating applied above +85°C ambient.
Does ISL91211AIIZ-T support both I²C and SPI communication interfaces?
Yes, ISL91211AIIZ-T supports both I²C (up to 3.4MHz) and SPI (up to 26MHz) through its MPIO pins. The default factory pin mode is I²C (IO_PINMODE = 0x0), but SPI operation is enabled by setting IO_PINMODE to 0x1 or 0x3 - no external level shifters or protocol converters required.
How is output voltage accuracy maintained across temperature for ISL91211AIIZ-T?
The ISL91211AIIZ-T achieves ±0.7% system output accuracy from –40°C to +85°C using internal bandgap reference trimming, remote voltage sensing (RTN1–RTN3), and Renesas' R5 control loop - eliminating need for external resistor dividers or calibration during production.
Can ISL91211AIIZ-T be used in a quad-output configuration?
No - ISL91211AIIZ-T is fixed as a triple-output device (2+1+1 phase). VOUT4 and RTN4 are internally shorted to ground per datasheet specification. For quad-output operation, the ISL91211BIIZ-T variant must be selected, which shares identical pinout and package but enables VOUT4 as an independent rail.
What protection features are integrated into ISL91211AIIZ-T?
The ISL91211AIIZ-T integrates undervoltage lockout (UVLO), overvoltage (±250mV threshold), overcurrent (12A phase-D, 8A other phases), overtemperature shutdown (143°C trip, 55°C hysteresis), and short-circuit protection - all with configurable fault response (latch-off or retry) via I²C registers.
ISL91211AIIZ-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:
- 3
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 1.2V
- Current - Output:
- 10A, 5A, 5A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 54-WLCSP (2.55x3.67)
ISL91211AIIZ-T FAQ
1.How can I place an order for ISL91211AIIZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91211AIIZ-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 ISL91211AIIZ-T reliable?
The price and inventory of ISL91211AIIZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91211AIIZ-T is usually 5 days.
3.What payment methods are accepted for ISL91211AIIZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91211AIIZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91211AIIZ-T?
ISL91211AIIZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91211AIIZ-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 ISL91211AIIZ-T?
For technical support, including ISL91211AIIZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91211AIIZ-T requirements.
6.How does Aetrix verify that ISL91211AIIZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91211AIIZ-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 ISL91211AIIZ-T meets industry standards.
7.What is the process for return or replacement of ISL91211AIIZ-T?
All ISL91211AIIZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91211AIIZ-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 ISL91211AIIZ-T part is unused and in its original packaging.
Return procedure for ISL91211AIIZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL91211AIIZ-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…
