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Renesas ISL91211BIKZ-TR5878
- Part No.:
- ISL91211BIKZ-TR5878
- Manufacturer:
- Renesas
- Package:
- 35-BGA
- Datasheet:
-
ISL91211BIKZ-TR5878.pdf
- Description:
- IC REG BUCK PROG QUAD 35BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
ISL91211BIKZ-TR5878 from Renesas is a quad-output, 4-phase programmable PMIC optimized for high-efficiency synchronous buck conversion in space-constrained portable electronics. 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 to generate four independently programmable outputs (0.3V–2.0V). It is deployed in AI processors and optical transceiver modules requiring fast transient response and dynamic voltage scaling.
For engineers reviewing the ISL91211BIKZ-TR5878 datasheet, ISL91211BIKZ-TR5878 pinout, ISL91211BIKZ-TR5878 application, or ISL91211BIKZ-TR5878 equivalent, key selection criteria include its 1+1+1+1 phase reconfigurability, 4MHz default switching frequency, integrated low-RDS(ON) MOSFETs (23mΩ HS / 9mΩ LS), R5 control architecture for ultra-fast load step response (50A/µs capability), and WLCSP-54 package with 0.4mm pitch for minimal PCB footprint.
Technical Context
The ISL91211BIKZ-TR5878 implements Renesas' proprietary R5 control architecture, enabling seamless DCM/CCM transitions without external compensation and delivering tight load regulation and sub-1.4ms boot-up time. Its four independent buck controllers support flexible power-stage assignment-each phase (PH_A–PH_D) can be assigned to any output (VOUT1–VOUT4) via configuration registers.
It integrates four MPIOs and three GPIOs configurable for I²C, SPI, PGOOD, DVS, or hardware enable functions. The device supports programmable PWM frequency (2–6MHz), independent dynamic voltage scaling per output, and comprehensive fault protection including UV/OV/OC/OT with short-circuit detection and thermal shutdown at 143–162°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Quad output (1+1+1+1 phase), each output independently configurable via I²C/SPI |
| Input Voltage Range | 2.5V–5.5V on AVIN/PVIN pins-supports single-supply operation across Li-ion battery and USB PD rails |
| Per-Phase Output Current | 5A continuous-enables compact 4×5A rail delivery without external drivers or discrete FETs |
| Switching Frequency | Programmable 2–6MHz-allows use of <220nH inductors and reduces solution size vs. lower-frequency PMICs |
| Output Voltage Range | 0.3V–2.0V (10-bit resolution, 1.2–2.0mV step)-covers core voltages for AI accelerators and SerDes PHYs |
| System Accuracy | ±0.7% over -40°C to +85°C with remote sensing-ensures stable operation under thermal and layout-induced IR drop |
| Control Architecture | R5 Technology-provides ultra-fast transient response (50A/µs per phase) and eliminates need for external loop compensation |
Pinout & Package
ISL91211BIKZ-TR5878 uses a 2.551mm × 3.670mm, 54-ball WLCSP package with 0.4mm ball pitch, RoHS-compliant and MSL3 rated.
| 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 |
| PH_A–PH_D | Power stage switching nodes | Four dedicated high-side/low-side switch outputs-assignable to any buck controller for flexible phase mapping |
| RTN1–RTN4 | Remote ground sense inputs | Compensate for PCB trace resistance between IC and load; required for ±0.7% accuracy |
| MPIO0–MPIO3 | Multipurpose I/O | Configurable as I²C/SPI, PGOOD, DVS, or EN signals-supports multiple pin-mode settings (0x0–0xC) |
| GPIO0–GPIO2 | General-purpose I/O | Support I²C clock/data (default), hardware enable, or DVS control-requires pull-up on MPIO1 for I²C mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stages | On-die 23mΩ high-side and 9mΩ low-side MOSFETs-eliminates external FETs and gate drivers, reducing BOM count and layout complexity |
| Dynamic Voltage Scaling (DVS) | Independent per-output slew rate control (3mV/µs typical)-enables rapid core voltage transitions during AI workload changes |
| Ultra-Fast Transient Response | 50A/µs per-phase current slew capability-maintains <±70mV output deviation during aggressive load steps in AI SoCs |
| Low Quiescent Current | 17µA total supply current in idle state (all bucks disabled)-extends battery life in always-on subsystems |
| Robust Fault Protection | Hardware-based UV/OV/OC/OT detection with latch-off or auto-retry-prevents damage during startup, overload, or thermal events |
Applications
| AI Processor Core Supply | Optical Transceiver Bias Rail |
|---|---|
Use Scenario: Powers CPU/GPU/NPU cores in edge AI accelerators requiring rapid voltage scaling across performance states. IC Role / Device Role / Timing Role: Quad-output PMIC delivering four independent, dynamically scaled rails (e.g., VDD_CPU, VDD_GPU, VDD_NPU, VDD_MEM). Use Value: Enables 3mV/µs DVS transitions and maintains ±0.7% accuracy across temperature-critical for silicon yield and thermal management in 7nm/5nm SoCs. | Use Scenario: Supplies bias voltages to laser diodes and TIAs in 100G/400G optical modules operating in telecom and datacom equipment. IC Role / Device Role / Timing Role: Generates tightly regulated, low-noise 1.2V, 1.8V, 2.5V, and 3.3V rails from a single 3.3V or 5V input bus. Use Value: Integrated R5 control ensures <100µs recovery from line/load transients-preserves signal integrity in high-speed analog front-ends. |
| Smartphone Application Processor | Drone Flight Controller SoC |
Use Scenario: Manages power for multi-core application processors (e.g., Snapdragon, Dimensity) in premium smartphones with advanced camera and display subsystems. IC Role / Device Role / Timing Role: Configured as 1+1+1+1 phase to deliver VDD_MAIN, VDD_LDO, VDD_CAM, and VDD_DISP with independent sequencing and monitoring. Use Value: 54-ball WLCSP enables placement directly under processor BGA-minimizes power loop inductance and improves EMI performance. | Use Scenario: Powers flight control SoCs and sensor fusion units in compact UAVs where weight, size, and thermal headroom are constrained. IC Role / Device Role / Timing Role: Provides four regulated rails for MCU core, IMU interface, radio modem, and ESC logic-all from a single LiPo input (2.5–5.5V). Use Value: 94.7% peak efficiency at 3.8VIN/1.8VOUT extends flight time; integrated thermal shutdown prevents overheating during sustained maneuvers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91211AIKZ-T | Triple-output (2+1+1 phase), identical package and pinout but VOUT4/RTN4 internally shorted to GND | Suitable only for 3-rail systems; lacks fourth independent output and associated PH_C routing flexibility | Select when design requires only three regulated supplies and cost reduction is prioritized over fourth-rail configurability |
| ISL91301BIKZ-T | Quad-output (1+1+1+1), but 42-ball WLCSP, 4A per phase, and no R5 architecture-slower transient response | Lower current capability and reduced thermal performance; not suitable for >4A/core AI workloads | Choose for cost-sensitive consumer devices with moderate power demands and less stringent transient requirements |
Compared with ISL91211AIKZ-T, the ISL91211BIKZ-TR5878 adds full fourth-rail support and independent DVS control, while versus ISL91301BIKZ-T it delivers higher per-phase current (5A vs 4A), faster transient response via R5 control, and superior accuracy-making it optimal for high-performance embedded AI and optical systems.
Availability
ISL91211BIKZ-TR5878 is available at Aetrix Electronics and suitable for AI accelerators, optical transceivers, and drone flight controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91211BIKZ-TR5878 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 enterprise markets.
The ISL91211B belongs to Renesas' high-density, multi-phase PMIC product line designed specifically for power-constrained, thermally sensitive applications in mobile AI, optical networking, and next-generation portable computing.
FAQ
What is the maximum continuous output current per phase for the ISL91211BIKZ-TR5878?
The ISL91211BIKZ-TR5878 supports up to 5A continuous output current per phase across all four power stages (PH_A–PH_D) under recommended operating conditions (2.5V–5.5V input, TA ≤ +85°C). This rating is validated with integrated 23mΩ high-side and 9mΩ low-side MOSFETs and applies to both CCM and DCM operation modes. Derating is required above +85°C ambient per the thermal specifications in FN8922 Rev.3.01.
Does the ISL91211BIKZ-TR5878 support independent dynamic voltage scaling (DVS) on all four outputs?
Yes, the ISL91211BIKZ-TR5878 supports fully independent DVS on all four outputs (VOUT1–VOUT4) via I²C or SPI register writes. Each output can be programmed with unique target voltage, slew rate (3mV/µs typical), and timing sequence. Pin-mode configurations (e.g., 0x7) also allow hardware-controlled DVS using one dedicated pin per buck, enabling real-time voltage adjustment without host processor intervention.
What package type and dimensions does the ISL91211BIKZ-TR5878 use?
The ISL91211BIKZ-TR5878 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 moisture sensitivity level (MSL) 3 rated per J-STD-020. The package features bottom-side solder balls and requires standard reflow profiles compatible with SnPb and Pb-free processes.
Can the ISL91211BIKZ-TR5878 be configured for dual-phase operation on a single output?
No-the ISL91211BIKZ-TR5878 is the quad-output variant (ISL91211B) and is factory-configured for 1+1+1+1 phase operation. Dual-phase operation (e.g., 2+1+1) is exclusive to the ISL91211A variant. While the ISL91211BIKZ-TR5878 shares the same die base and pinout, its internal configuration fuses and register map enforce four independent single-phase controllers; attempting dual-phase assignment on VOUT1 would violate functional specification and is unsupported.
What communication interfaces does the ISL91211BIKZ-TR5878 support, and what are their speed limits?
The ISL91211BIKZ-TR5878 supports both I²C and SPI interfaces. I²C operates up to 3.4MHz (fast-mode plus), with SCL/SDA mapped to GPIO0/GPIO1 in default pin-mode 0x0. SPI supports up to 26MHz clock frequency, with SCK/SS_B/MOSI/MISO assigned to MPIO0–MPIO3. Interface selection is controlled by the SS_B pin level (low = SPI, high = I²C), and both protocols share the same register address map and configuration capabilities.
ISL91211BIKZ-TR5878 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 35-BGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 2V
- Current - Output:
- 5A, 5A, 5A, 5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 35-BGA (4.7x6.3)
ISL91211BIKZ-TR5878 FAQ
1.How can I place an order for ISL91211BIKZ-TR5878 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91211BIKZ-TR5878 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 ISL91211BIKZ-TR5878 reliable?
The price and inventory of ISL91211BIKZ-TR5878 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91211BIKZ-TR5878 is usually 5 days.
3.What payment methods are accepted for ISL91211BIKZ-TR5878?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91211BIKZ-TR5878 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91211BIKZ-TR5878?
ISL91211BIKZ-TR5878 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91211BIKZ-TR5878 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 ISL91211BIKZ-TR5878?
For technical support, including ISL91211BIKZ-TR5878 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91211BIKZ-TR5878 requirements.
6.How does Aetrix verify that ISL91211BIKZ-TR5878 is sourced from the original manufacturer or authorized distributors?
All ISL91211BIKZ-TR5878 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 ISL91211BIKZ-TR5878 meets industry standards.
7.What is the process for return or replacement of ISL91211BIKZ-TR5878?
All ISL91211BIKZ-TR5878 units undergo pre-shipment inspection (PSI). If there is an issue with ISL91211BIKZ-TR5878, 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 ISL91211BIKZ-TR5878 part is unused and in its original packaging.
Return procedure for ISL91211BIKZ-TR5878:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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