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Renesas ISL99227BFRZ-TS2568
- Part No.:
- ISL99227BFRZ-TS2568
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- Renesas
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ISL99227BFRZ-TS2568.pdf
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- ISL99227BFRZ-TS2568
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Product details
Overview
ISL99227BFRZ-TS2568 from Renesas Electronics is a Smart Power Stage (SPS) module integrating high-side and low-side MOSFETs, downslope current sensing, ±3% accurate IMON output, 8mV/°C TMON, and comprehensive fault protection including HFET short detection, overcurrent (90A trip), and over-temperature (140°C rising threshold). It serves as a phase-leg power stage in multiphase VRMs for microprocessor core voltage regulation.
For engineers reviewing the ISL99227BFRZ-TS2568 datasheet, ISL99227BFRZ-TS2568 pinout, ISL99227BFRZ-TS2568 application, or ISL99227BFRZ-TS2568 equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and current monitoring behavior, and real-world compatibility with ISL6617A phase doublers and digital multiphase controllers requiring 5V tri-state PWM input.
Technical Context
The ISL99227BFRZ-TS2568 implements a synchronous buck power stage with integrated 3.84mΩ high-side and 0.76mΩ low-side NFETs, driven by logic-compatible 5V tri-state PWM inputs. Its internal bootstrap NFET replaces external diodes, and shoot-through protection enforces dead-time control with GH/GL propagation delays under 40ns.
Current monitoring uses downslope sampling with 160ns blanking time and outputs IMON referenced to REFIN (0.8–1.6V range); temperature sensing provides linear 8mV/K output with OT flag at 140°C and 15°C hysteresis. Fault reporting combines open-drain FAULT# with dedicated IMON and TMON flags for controller-level diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.5V to +18V - supports standard server and CPU VRM input rails including 12V and 5V intermediate buses. |
| Continuous DC Current Rating | 60A - defines maximum steady-state load capability per phase without derating under thermal limits. |
| PWM Input Compatibility | 5.0V tri-state - enables direct interface with ISL6617A phase doublers and digital controllers using 5V logic levels. |
| Current Monitor Accuracy | ±3% at ≥10A, TJ = +40°C to +125°C - ensures precise current feedback for DMP controller current balancing and phase shedding. |
| Temperature Monitor Slope | 8mV/°C - provides linear analog output (0.6V + 8mV × TJ) for accurate junction temperature tracking across -40°C to +125°C. |
| Overtemperature Threshold | 140°C rising, 125°C falling - hysteresis prevents chatter during thermal transients and triggers FAULT# assertion. |
| HFET Overcurrent Trip | 90A typical - hard-limit protection independent of controller loop response, activated during high-side conduction. |
| Package Thermal Resistance | θJA = 10.7°C/W (0 LFM), θJC = 4°C/W - enables high-power density layout with double-sided cooling via 32-lead 5×5 PQFN package. |
Pinout & Package
ISL99227BFRZ-TS2568 uses a RoHS-compliant 32-lead 5×5 mm PQFN Double Cooling package (PKG DWG # L32.5x5V) with exposed thermal pads on top and bottom for enhanced heat dissipation in high-density VRM designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LGCTRL | Lower gate control input | Forces GL low (LFET off) when logic-low; otherwise obeys PWM - used for safe startup sequencing and dynamic phase control. |
| 2 VCC | +5V logic bias supply | Powers internal logic and POR circuitry; requires local 1µF X7R ceramic decoupling to GND. |
| 3 PVCC | +5V gate drive bias supply | Supplies high-current gate drivers; requires local 1µF X7R ceramic decoupling to GND. |
| 9–16, 21–23, 27 SW | Switch node | Common connection point between HFET source and LFET drain; carries full AC switching current to output inductor. |
| 24 PHASE | Bootstrap return | Internally tied to SW; no external routing needed - simplifies layout and reduces parasitic inductance in boot loop. |
| 25 BOOT | Floating bootstrap supply | Drives high-side gate via internal NFET bootstrap switch; requires 0.1–0.22µF X7R ceramic capacitor to PHASE. |
| 26 FAULT# | Open-drain fault reporting | Pulled low on any fault (OC, OT, UVLO, HFET short); used to disable controller EN or trigger system-level alerts. |
| 28 PWM | 5V tri-state PWM input | Accepts 5V logic levels from ISL6617A; enters shutdown window (1.6–2.8V) to force both FETs off during fault recovery. |
| 30 REFIN | IMON reference input | Sets zero-current baseline for IMON output; must be 0.8–1.6V and decoupled with 0.1µF ceramic to GND. |
| 31 IMON | Current monitor output | Outputs REFIN + (IL × gain); pulled to REFIN + 1.2V during HFET overcurrent or short - signals controller within µs. |
| 32 TMON | Temperature monitor output | Outputs 0.6V + 8mV/°C; pulled to 2.5V during overtemperature - supports daisy-chained bus for multi-phase thermal monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.84mΩ HS / 0.76mΩ LS MOSFETs | Enables >95% efficiency at 60A/1.2V with minimal external components and reduced board area vs discrete solutions. |
| Downslope current sensing with 160ns blanking | Eliminates need for DCR sensing network and thermal compensation circuitry, improving light-load accuracy and reducing BOM count. |
| Dedicated LGCTRL pin | Allows independent control of low-side FET for adaptive dead-time adjustment, phase shedding, and inrush limiting. |
| HFET short detection (100mV SW threshold) | Identifies catastrophic failure during LFET conduction and latches FAULT# until VCC POR reset - prevents secondary damage. |
| Tri-state PWM input with 5V compatibility | Supports robust handshake with ISL6617A phase doublers; shutdown window forces safe FET-off state without controller intervention. |
| Double-cooling 5×5 PQFN package | Provides θJC = 4°C/W and supports >100W peak power dissipation - critical for high-density server and AI accelerator VRMs. |
Applications
| Core Voltage Regulation for CPUs | GPU VRM in High-Performance Workstations |
|---|---|
|
Use Scenario: Delivering tightly regulated 0.8–1.5V at up to 600A total from 6–12 parallel phases in x86 and Arm-based server processors. IC Role / Device Role / Timing Role: Single-phase Smart Power Stage providing current, temperature, and fault telemetry to ISL68xxx/69xxx controllers via IMON, TMON, and FAULT#. Use Value: Enables per-phase current balancing, dynamic phase shedding, and predictive thermal management - extending processor lifetime and sustaining turbo frequencies. |
Use Scenario: Powering discrete GPUs in AI training servers where transient response and thermal headroom are critical under 1ms load steps. IC Role / Device Role / Timing Role: Phase-leg driver with 90A OC protection and 140°C OT threshold, interfacing with ISL6617A to double phase count without adding complexity. Use Value: Reduces VRM footprint by 40% vs discrete solutions while maintaining <1% output voltage deviation during 100A/µs transients. |
| Memory Regulator in Cloud Data Centers | POL DC/DC for FPGA and ASIC Accelerators |
|
Use Scenario: Supplying DDR5 memory subsystems requiring fast transient response, low noise, and tight voltage tolerance (±3%) at 1.1V/120A per channel. IC Role / Device Role / Timing Role: SPS module delivering downslope-sensed current feedback and real-time die temperature data to support closed-loop margining and aging compensation. Use Value: Eliminates external current sense resistors and DCR compensation networks - improving signal integrity and reducing thermal drift in memory VRMs. |
Use Scenario: Point-of-load conversion for heterogeneous compute modules where space-constrained PCBs demand integrated power stages with built-in diagnostics. IC Role / Device Role / Timing Role: Self-contained buck stage with IMON/REFIN interface, TMON bus capability, and open-drain FAULT# for centralized system health monitoring. Use Value: Cuts design cycle time by removing gate driver layout, bootstrap component selection, and current sense calibration - accelerating FPGA/ASIC bring-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Smart Power Stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL99227FRZ-T | 3.3V PWM input; identical 60A rating, thermal/current monitoring, and 5×5 PQFN package. | Designed for ISL68xxx/69xxx digital controllers with 3.3V PWM outputs - not compatible with ISL6617A. | Select ISL99227FRZ-T only when paired with Renesas 3.3V PWM controllers; ISL99227BFRZ-TS2568 is required for 5V PWM systems. |
| ISL99135B | 35A rating, no IMON/TMON, 24-lead 3.5×5 QFN, no tri-state PWM - lacks current/thermal telemetry and fault reporting. | Targeted at cost-sensitive analog VRMs (e.g., ISL633x) without digital telemetry requirements. | Choose ISL99135B only for non-telemetry, lower-current (<40A) applications where BOM cost outweighs diagnostic capability. |
Compared with ISL99227FRZ-T, ISL99227BFRZ-TS2568 enables 5V PWM compatibility with phase doublers but shares identical monitoring and protection features; versus ISL99135B, it adds full telemetry, higher current, and advanced fault handling at the cost of increased pin count and package size.
Availability
ISL99227BFRZ-TS2568 is available at Aetrix Electronics and suitable for high-density server VRMs, GPU power delivery, and AI accelerator POL converters requiring stable component supply, long-term lifecycle support, and traceable sourcing for volume production.
Supply support for ISL99227BFRZ-TS2568 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 timing solutions for automotive, industrial, and datacenter applications.
The ISL99227BFRZ-TS2568 belongs to Renesas' Smart Power Stage family, engineered specifically for high-efficiency, high-density multiphase VRMs in cloud computing, AI accelerators, and enterprise graphics systems.
FAQ
What is the PWM input voltage compatibility of the ISL99227BFRZ-TS2568?
The ISL99227BFRZ-TS2568 accepts 5.0V tri-state PWM input signals and is explicitly designed for interoperability with the ISL6617A phase doubler and other 5V PWM controllers. Its input thresholds (1.6–2.8V shutdown window) and impedance (16.5kΩ pull-up/pull-down) are optimized for 5V logic levels - unlike the 3.3V-compatible ISL99227 variants. This ensures reliable gate drive control without level-shifting circuitry in 5V PWM systems.
How does the ISL99227BFRZ-TS2568 implement current monitoring without a sense resistor?
The ISL99227BFRZ-TS2568 performs downslope current sensing on the low-side FET, sampling IL during the off-time after PWM falling edge with 160ns blanking. The IMON pin outputs a voltage referenced to REFIN (0.8–1.6V), with ±3% accuracy at ≥10A. This eliminates external RSENSE or DCR networks, reducing component count and thermal drift while enabling precise per-phase current reporting to digital controllers like ISL68xxx/69xxx.
What fault conditions trigger the FAULT# pin on the ISL99227BFRZ-TS2568?
The FAULT# pin on the ISL99227BFRZ-TS2568 is pulled low for overcurrent (90A HFET trip), overtemperature (140°C junction), HFET short detection (SW >100mV during LFET on), and VCC/VIN undervoltage lockout (UVLO). It aggregates all critical faults into a single open-drain signal usable for controller enable/disable or system-level fault logging - ensuring rapid system response without requiring separate monitoring of IMON or TMON.
Can multiple ISL99227BFRZ-TS2568 devices share a common TMON bus?
Yes - the TMON pin on each ISL99227BFRZ-TS2568 is designed for wired-OR connection. When multiple TMON outputs are tied together, the highest voltage (representing the hottest device) dominates the bus, allowing a single controller ADC input to monitor the worst-case temperature across all phases. This simplifies thermal management in multiphase VRMs without requiring individual temperature sensors per phase.
What is the thermal performance advantage of the ISL99227BFRZ-TS2568's 5×5 PQFN Double Cooling package?
The ISL99227BFRZ-TS2568's 32-lead 5×5 mm PQFN Double Cooling package achieves θJC = 4°C/W and θJA = 10.7°C/W (0 LFM), enabling efficient heat extraction from both top and bottom surfaces. This allows sustained 60A operation in compact VRM layouts where airflow is limited - critical for high-power AI accelerators and dense server motherboards where traditional packages would require excessive copper area or forced cooling.
ISL99227BFRZ-TS2568 Specifications
- Product attributes
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- Manufacturer:
- Renesas
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- Bulk
- Product Status:
- Obsolete
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ISL99227BFRZ-TS2568 FAQ
1.How can I place an order for ISL99227BFRZ-TS2568 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL99227BFRZ-TS2568 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 ISL99227BFRZ-TS2568 reliable?
The price and inventory of ISL99227BFRZ-TS2568 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL99227BFRZ-TS2568 is usually 5 days.
3.What payment methods are accepted for ISL99227BFRZ-TS2568?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL99227BFRZ-TS2568 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL99227BFRZ-TS2568?
ISL99227BFRZ-TS2568 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL99227BFRZ-TS2568 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 ISL99227BFRZ-TS2568?
For technical support, including ISL99227BFRZ-TS2568 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL99227BFRZ-TS2568 requirements.
6.How does Aetrix verify that ISL99227BFRZ-TS2568 is sourced from the original manufacturer or authorized distributors?
All ISL99227BFRZ-TS2568 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 ISL99227BFRZ-TS2568 meets industry standards.
7.What is the process for return or replacement of ISL99227BFRZ-TS2568?
All ISL99227BFRZ-TS2568 units undergo pre-shipment inspection (PSI). If there is an issue with ISL99227BFRZ-TS2568, 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 ISL99227BFRZ-TS2568 part is unused and in its original packaging.
Return procedure for ISL99227BFRZ-TS2568:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL99227BFRZ-TS2568 Tags
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UMFT234XF
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