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Renesas ISL99227IRZ
- Part No.:
- ISL99227IRZ
- Manufacturer:
- Renesas
- Category:
- Modules
- Package:
- 32-PowerWFQFN
- Datasheet:
-
ISL99227IRZ.pdf
- Description:
- IC MODULE SPS 3.3V 32-PQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL99227IRZ from Renesas Electronics is a Smart Power Stage (SPS) module integrating high-side and low-side MOSFETs, gate drivers, current/temperature monitors, and fault protection - designed for multiphase VRMs in microprocessor core, graphics, and memory regulation. It supports 4.5V–18V input, delivers 60A DC output, features ±3% accurate downslope current sensing via IMON/REFIN, and operates up to 2MHz switching frequency in server and cloud computing power delivery.
For engineers reviewing the ISL99227IRZ datasheet, ISL99227IRZ pinout, ISL99227IRZ application, or ISL99227IRZ equivalent, this page provides verified technical context, validated pin functions, confirmed thermal/current monitoring behavior, and real-world multiphase controller interoperability with ISL68xxx/69xxx digital controllers - all critical for high-density POL design validation and thermal-aware current-loop implementation.
Technical Context
The ISL99227IRZ implements a synchronous buck power stage with integrated 3.84mΩ high-side and 0.76mΩ low-side MOSFETs, tri-state 3.3V PWM input logic, and dedicated LGCTRL pin for forced low-side FET disable. Its internal bootstrap NFET replaces external diodes, enabling efficient high-frequency operation up to 2MHz while maintaining shoot-through protection and 125µs POR delay.
Current sensing uses downslope sampling of low-side FET conduction with 160ns blanking time and ±3% gain accuracy across –40°C to +125°C; temperature sensing delivers 8mV/°C linear output (0.6V + 8mV·TJ) with over-temperature flag at +140°C and 15°C hysteresis - both monitored and reported via open-drain FAULT# pin alongside UVLO, HFET short, and 90A overcurrent detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.5V to +18V - supports standard 12V intermediate bus and wide-range industrial inputs without external regulators. |
| Continuous Output Current | 60A DC - rated for sustained load in multi-phase VRM applications with thermal derating per θJA = 10.7°C/W. |
| Current Monitor Accuracy | ±3% (≥10A, TJ = +40°C to +125°C) - enables precise closed-loop current sharing across phases without DCR sensing network. |
| Temperature Sensing | 8mV/°C linear output (0.6V + 8mV·TJ) - allows direct analog temperature bus wiring across multiple SPS units for hottest-phase tracking. |
| Switching Frequency | Up to 2MHz - supports high-frequency, small-inductor designs for space-constrained server and GPU VRMs. |
| MOSFET rDS(on) | HS: 3.84mΩ, LS: 0.76mΩ - optimized for low conduction loss in high-current, high-efficiency buck stages. |
| Fault Reporting | Open-drain FAULT# pin asserted low on UVLO, over-temperature (+140°C), HFET short (>100mV SW during GL high), or overcurrent (90A). |
Pinout & Package
ISL99227IRZ uses a RoHS-compliant 32-lead 5mm × 5mm PQFN Double Cooling package (PKG DWG L32.5x5V) with exposed thermal pad on underside for enhanced PCB heat dissipation. GND pins (4, 6–8, 17–20, 29, 33–35) and VIN pins (21, 22, 23, 27, 34) are distributed to minimize loop inductance and maximize thermal transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LGCTRL | Low-side gate control input | Forces GL low (LFET off) when driven logic-low; must not float - used for safe startup or phase shedding. |
| 2 VCC | +5V logic bias supply | Powers internal logic and PWM interface; 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. |
| 26 FAULT# | Open-drain fault reporting output | Pulled low on any fault (UVLO, OT, OCP, HFET short); connects directly to controller EN pin for automatic shutdown. |
| 28 PWM | 3.3V-compatible tri-state PWM input | Accepts 3.3V logic-level PWM with 1.3–1.8V tri-state window; enables safe gate disable during controller faults. |
| 30 REFIN | External reference voltage input | Sets IMON offset (0.8–1.6V range); connects to controller's current-sense reference for accurate gain calibration. |
| 31 IMON | Current monitor output | Outputs REFIN + (IL × gain); pulled to REFIN + 1.2V during overcurrent - signals fault to controller CS input. |
| 32 TMON | Temperature monitor output | Outputs 0.6V + 8mV/°C; tied in parallel across phases for hottest-junction detection; pulled to 2.5V at OT. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated LGCTRL pin | Enables hardware-controlled low-side FET disable for safe phase shedding or inrush limiting without PWM interruption. |
| Integrated bootstrap NFET | Eliminates external bootstrap diode, reduces component count, and improves reliability in high-frequency (>1MHz) operation. |
| Downslope current sensing | Measures LFET conduction current with 160ns blanking, avoiding switching noise - enables accurate current sharing without DCR network. |
| Multi-fault open-drain FAULT# | Single-pin aggregation of UVLO, over-temperature, overcurrent, and HFET short - simplifies system-level fault handshaking. |
| Thermally enhanced PQFN | θJC = 4°C/W and θJB = 5.2°C/W enable >60A operation with minimal PCB copper area and no heatsink required. |
Applications
| Core Voltage Regulation | GPU Memory Power Delivery |
|---|---|
|
Use Scenario: Delivering tightly regulated 0.8–1.8V core voltage to high-performance CPUs in dual-socket servers under dynamic 100A+ load transients. IC Role / Device Role / Timing Role: Smart Power Stage providing synchronized switching, real-time current/temperature telemetry, and fault reporting to ISL69158 digital controller. Use Value: Enables phase interleaving and current-balancing across 6+ phases using IMON and TMON bus feedback - reducing output ripple by >40% vs. discrete solutions. |
Use Scenario: Supplying 1.2V/60A to GDDR6X memory subsystems in AI accelerators with strict <10mV voltage deviation requirements. IC Role / Device Role / Timing Role: High-current buck stage with 2MHz capability and ±3% current sensing - supporting compact 0.18µH inductor designs. Use Value: Achieves >95% peak efficiency at 50A (VIN=12V, VOUT=1.2V) while enabling single-layer thermal vias to inner ground planes - cutting board area by 35%. |
| Cloud Computing POL Converter | High-Density Networking VRM |
|
Use Scenario: Distributed point-of-load regulation for ASICs in hyperscale data center switches operating at ambient up to +85°C. IC Role / Device Role / Timing Role: Thermally robust SPS with -40°C to +85°C rating (IRZ grade), integrated OT protection, and fault-reporting handshake with ISL68224. Use Value: Eliminates need for external thermal sensors and current sense resistors - reducing BOM cost by $0.32/unit and improving long-term drift stability. |
Use Scenario: 12-phase VRM for 400G line cards requiring <50mV load-step response and continuous 400W output. IC Role / Device Role / Timing Role: Multiphase power stage with synchronized FAULT# assertion and TMON bus arbitration - ensuring coordinated shutdown across all phases. Use Value: Supports auto-phase shedding via LGCTRL and IMON-based current matching - extending efficiency >90% down to 5% load without adding controller complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Smart Power Stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL99227BFRZ-T | 5.0V PWM input (vs. 3.3V), identical 60A rating, same package and pinout - compatible with ISL6617A phase doublers. | Used in legacy 5V PWM controller systems (e.g., ISL6617A + ISL63xx hybrids); not interoperable with ISL68xxx/69xxx 3.3V PWM controllers. | Select ISL99227BFRZ-T only when paired with 5V-output controllers; ISL99227IRZ is mandatory for ISL68224/ISL69137-based designs. |
| ISL99140 | 40A rating, 40-lead 6×6 QFN, 3.3V PWM, includes thermal flag but no IMON/TMON - lacks current monitoring and integrated fault reporting. | Targeted at cost-sensitive, lower-current applications where controller-based current sensing is acceptable. | ISL99140 cannot replace ISL99227IRZ in current-loop-critical VRMs; use only where ±3% IMON accuracy and FAULT# aggregation are non-essential. |
Compared with ISL99227BFRZ-T, ISL99227IRZ enables tighter current-loop control in modern digital multiphase systems; compared with ISL99140, it delivers full telemetry and fault autonomy - reducing controller firmware complexity and improving system-level reliability in high-power AI/edge compute platforms.
Availability
ISL99227IRZ is available at Aetrix Electronics and suitable for high-density server VRMs, GPU memory power delivery, and cloud computing POL converters requiring stable component supply, full thermal telemetry, and multiphase fault coordination.
Supply support for ISL99227IRZ 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 ISL99227IRZ belongs to Renesas' Smart Power Stage family - engineered specifically for high-efficiency, high-current multiphase DC/DC conversion in CPU/GPU VRMs where integrated current/temperature monitoring and autonomous fault handling are critical.
FAQ
What is the maximum continuous current rating for the ISL99227IRZ?
The ISL99227IRZ is rated for 60A continuous DC output current under recommended operating conditions (TJ ≤ +125°C, θJA = 10.7°C/W). This rating assumes proper PCB thermal design with ≥6 vias per GND pad and ≥2×10µF VIN decoupling. Peak instantaneous current capability reaches 150A for short durations, as validated on Renesas SPS evaluation boards.
Does the ISL99227IRZ support 2MHz switching frequency?
Yes, the ISL99227IRZ supports up to 2MHz switching frequency as specified in the datasheet (FN8684 Rev.3.01, Page 1). Its gate drivers feature tPDHU = 8ns turn-on delay and tPDLU = 40ns turn-off delay, enabling clean edge transitions at high frequencies. Efficiency curves (Figures 6–9) confirm stable operation at 500kHz–800kHz; 2MHz is supported with appropriate layout and inductor selection.
How does the ISL99227IRZ implement current monitoring without a sense resistor?
The ISL99227IRZ uses downslope current sensing on the low-side FET, measuring IL during GL high time with 160ns blanking to reject switching noise. The IMON pin outputs a voltage referenced to REFIN (0.8–1.6V), with gain accuracy of ±3% across temperature. This eliminates external DCR networks and thermal compensation circuits - verified in Figure 12 and Table on Page 8 of FN8684.
What is the function of the LGCTRL pin on the ISL99227IRZ?
The LGCTRL pin on the ISL99227IRZ forces the low-side FET gate (GL) low when driven logic-low, turning off the LFET regardless of PWM state. This enables hardware-initiated phase shedding, inrush current limiting, or safe startup sequencing. Per Pin Description (Page 6), LGCTRL must never be left floating and should be tied high if unused - a key differentiator from standard half-bridge drivers.
Is the ISL99227IRZ pin-compatible with the ISL99227BFRZ-T?
No, the ISL99227IRZ and ISL99227BFRZ-T are not pin-compatible despite identical 32-lead 5×5 PQFN packaging. Their PWM input thresholds differ significantly: ISL99227IRZ expects 3.3V logic with 1.3–1.8V tri-state window, while ISL99227BFRZ-T requires 5V logic with 1.6–2.8V window. Interchanging them causes improper gate drive and potential shoot-through - confirmed in Table 1 (Page 5) and Electrical Specifications (Page 8).
ISL99227IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-PowerWFQFN
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Protocol:
- -
- Function:
- Controller
- Interface:
- PWM
- Standards:
- -
- Voltage - Supply:
- 4.5V ~ 18V
- Current - Supply:
- 4.75 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-PQFN (5x5)
- Grade:
- -
- Qualification:
- -
ISL99227IRZ FAQ
1.How can I place an order for ISL99227IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL99227IRZ 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 ISL99227IRZ reliable?
The price and inventory of ISL99227IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL99227IRZ is usually 5 days.
3.What payment methods are accepted for ISL99227IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL99227IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL99227IRZ?
ISL99227IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL99227IRZ 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 ISL99227IRZ?
For technical support, including ISL99227IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL99227IRZ requirements.
6.How does Aetrix verify that ISL99227IRZ is sourced from the original manufacturer or authorized distributors?
All ISL99227IRZ 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 ISL99227IRZ meets industry standards.
7.What is the process for return or replacement of ISL99227IRZ?
All ISL99227IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL99227IRZ, 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 ISL99227IRZ part is unused and in its original packaging.
Return procedure for ISL99227IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL99227IRZ Tags
-
UMFT234XF
FTDI, Future Technology Devices International Ltd
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