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Renesas ISL68144IRAZ-T
- Part No.:
- ISL68144IRAZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
ISL68144IRAZ-T.pdf
- Description:
- GP X+Y 4 PHASE DIGI CONT 40PIN 5
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
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Product details
Overview
ISL68144IRAZ-T from Renesas is a digital dual-output, 4-phase configurable PWM controller designed for Cavium CN99xx server-class processors. It supports flexible phase allocation (e.g., 3+1 or 2+2), PMBus 1.3 telemetry, and proprietary linear synthetic current modulation for sub-100ns transient response. It delivers ±0.5% closed-loop system accuracy via differential remote sensing and enables high-reliability point-of-load regulation in server CPU/FPGA power rails.
For engineers reviewing the ISL68144IRAZ-T datasheet, ISL68144IRAZ-T pinout, ISL68144IRAZ-T application, or ISL68144IRAZ-T equivalent, key selection criteria include its 40-pin 5×5mm TQFN package, dual-edge PWM modulation, auto phase add/drop thresholds programmable via PowerNavigator, and support for DCR/smart power stage current sensing with integrated temperature compensation.
Technical Context
The ISL68144IRAZ-T implements a constant-frequency, dual-edge digital PWM modulator where both leading and trailing edges are independently adjusted to minimize latency and optimize transient response. Its zero-latency synthetic current control ensures HF current balance across phases without analog comparators.
It integrates a 12-bit ADC-based telemetry engine supporting real-time VIN, VOUT, IOUT, temperature, and fault status reporting over PMBus up to 2MHz. The on-chip NVM stores up to eight user configurations, selected via CONFIG pin-strapping - enabling rapid deployment of multiple power rail profiles without firmware reprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Configuration | X+Y ≤ 4 total phases (e.g., 4+0, 3+1, 2+2); fully configurable per output via PowerNavigator |
| Switching Frequency | 200–1000 kHz range; ±4% accuracy at 500 kHz; enables optimized efficiency vs. EMI trade-off |
| Output Voltage Range | 0.25–3.05 V; ±0.5% set-point accuracy (0.8–3.05 V) ensures tight regulation for modern core rails |
| Current Sensing | Supports smart power stage (e.g., ISL99227), DCR, or resistor sensing with ±2% accuracy and integrated temp compensation |
| PMBus Compliance | PMBus 1.3; supports telemetry (VIN/VOUT/IOUT/power/temp), fault logging, and configuration read/write at up to 2 MHz |
| Thermal Monitoring | Dual TMON inputs (TMON0/TMON1); ±4.5°C sensor accuracy; open-drain TWARN flag for over-temp warning |
| Voltage Sensing | Differential remote sense (VSEN0/RGND0, VSEN1/RGND1); ±0.5% closed-loop system accuracy over load/line/temp |
Pinout & Package
ISL68144IRAZ-T is housed in a RoHS-compliant 40-lead 5×5 mm TQFN package (PKG DWG L40.5x5D) with exposed thermal pad (EPAD) connected to GND. Pin pitch is 0.5 mm; recommended reflow profile follows JEDEC J-STD-020 Pb-free standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM[3:0] (Pins 1–4) | PWM output drivers | 3.3V logic-compatible outputs driving smart power stages or DrMOS; support dual-edge modulation |
| EN0 / EN1 (Pins 11–12) | Output enable inputs | Active-high TTL-level enables for Output 0 and Output 1; tie to GND if unused |
| PG0 / PG1 (Pins 14–15) | Power-good indicators | Open-drain signals asserting when respective output is within ±10% regulation window |
| SCL / SDA / SALRT (Pins 16–18) | PMBus interface | Standard SMBus-compatible bus interface; supports up to 2 MHz clock; SALRT provides interrupt-on-fault |
| VSEN0/RGND0 & VSEN1/RGND1 (Pins 32,31,22,21) | Differential voltage sense inputs | Enable remote sensing for ±0.5% system accuracy; RGND pins must connect to local ground near load |
| CS[3:0]/CSRTN[3:0] (Pins 23–30) | Phase current sense inputs | Differential inputs supporting DCR, resistor, or smart power stage current sensing; unused pairs grounded |
| TMON0 / TMON1 (Pins 33–34) | Temperature monitor inputs | Accept diode-connected transistors or smart power stage thermal diodes; enable per-rail thermal protection |
| VINSEN (Pin 20) | Input voltage sense | Monitors input rail via resistor divider (e.g., 40.2k/10k); enables accurate input power calculation and UV/OV protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual-edge digital PWM modulation | Independent leading/trailing edge control enables fastest possible transient response without pulse skipping or frequency variation |
| Auto phase add/drop | User-programmable thresholds via PowerNavigator maximize efficiency across full load range - from idle to full load |
| On-chip NVM with 8 configurations | Eliminates external EEPROM; pin-strapped CONFIG selection allows hardware-defined power rail variants in same BOM |
| Diode braking | Reduces output overshoot during fast load transients by actively sinking current through external diodes |
| Comprehensive fault management | Includes per-phase OCP, total output OCP, OV/UV, open-sense detect, black-box fault logging, and thermal warning (TWARN) |
| DCR sensing with temp compensation | Compensates copper resistance drift over temperature using TMON inputs - maintains current sense accuracy without external ICs |
Applications
| Server CPU Core Rail | FPGA Core & I/O Rails |
|---|---|
Use Scenario: Regulating 0.8–1.2V core supply for Cavium CN99xx multi-core processors under dynamic workloads. IC Role / Device Role / Timing Role: Dual-output PWM controller managing 3+1 phase configuration with independent loop control and PMBus telemetry. Use Value: Meets Intel server-class transient specs with <100ns response time; ±0.5% closed-loop accuracy ensures timing margin compliance. |
Use Scenario: Delivering tightly regulated 0.85V core and 1.8V I/O supplies to high-density FPGAs in telecom line cards. IC Role / Device Role / Timing Role: Configurable 2+2 phase controller with differential remote sensing and auto phase scaling. Use Value: Enables single-controller solution for dual-rail FPGA power with independent soft-start, droop, and fault handling. |
| Memory Subsystem (DDR4/LPDDR4) | ASIC Point-of-Load Supply |
Use Scenario: Providing low-noise, high-accuracy 1.2V supply to DDR4 memory modules in storage controllers. IC Role / Device Role / Timing Role: Single-output 4-phase controller (4+0 mode) with DCR current sensing and diode braking. Use Value: Achieves <±5mV load regulation error across temperature; diode braking suppresses >150mV overshoot during burst reads. |
Use Scenario: Powering custom ASICs in networking switches requiring programmable voltage sequencing and telemetry. IC Role / Device Role / Timing Role: Digital controller with PMBus 1.3 interface enabling real-time IOUT/VOUT monitoring and dynamic voltage scaling. Use Value: Supports firmware-driven voltage optimization; black-box fault logging aids field failure root-cause analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL68134IRAZ-T | Supports AVSBus in addition to PMBus; identical 4-phase X+Y≤4 architecture and 5×5 TQFN package | Required where Adaptive Voltage Scaling (AVS) is used for dynamic voltage/frequency scaling in ASICs | Select ISL68134IRAZ-T only if AVSBus protocol integration is needed; otherwise ISL68144IRAZ-T offers simpler PMBus-only implementation |
| MP2960A-LF-Z | Monolithic 4-phase controller with integrated MOSFET drivers; no external smart power stage required; different pinout and register map | Better suited for space-constrained designs where board area is critical and lower current (<40A/output) is acceptable | Choose MP2960A-LF-Z for cost-sensitive, lower-power applications; ISL68144IRAZ-T preferred for high-current (>60A), high-accuracy server-grade rails |
Compared with ISL68134IRAZ-T, the ISL68144IRAZ-T omits AVSBus support for streamlined PMBus-only operation; compared with MP2960A-LF-Z, it trades integration for higher current scalability via external smart power stages and superior telemetry fidelity.
Availability
ISL68144IRAZ-T is available at Aetrix Electronics and suitable for server motherboard design, telecom baseband processing units, and enterprise SSD power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL68144IRAZ-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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and datacenter applications.
The ISL68144IRAZ-T belongs to Renesas' digital multiphase controller product line, engineered specifically for high-performance, high-efficiency point-of-load regulation in next-generation server and networking processors.
FAQ
What is the maximum supported switching frequency for the ISL68144IRAZ-T?
The ISL68144IRAZ-T supports a programmable switching frequency range of 200 kHz to 1000 kHz, with ±4% accuracy when set to 500 kHz. This range allows designers to balance efficiency, component size, and EMI performance. The ISL68144IRAZ-T maintains constant frequency under DC loads and uses dual-edge modulation to respond to transients without altering average frequency.
Does the ISL68144IRAZ-T support remote voltage sensing?
Yes, the ISL68144IRAZ-T supports true differential remote voltage sensing on both outputs via dedicated VSEN0/RGND0 and VSEN1/RGND1 pin pairs. This enables ±0.5% closed-loop system accuracy over load, line, and temperature variations - critical for maintaining timing margins in high-speed processor rails.
Can the ISL68144IRAZ-T operate with only one output active?
Yes, the ISL68144IRAZ-T supports 4+0 phase configuration where all four phases drive a single output while Output 1 remains disabled. This mode is fully supported in PowerNavigator and maintains full telemetry, fault protection, and auto phase add/drop functionality for the active rail.
What current sensing methods does the ISL68144IRAZ-T support?
The ISL68144IRAZ-T supports three current sensing methods: smart power stage (e.g., ISL99227), DCR sensing with integrated temperature compensation, and discrete resistor sensing. Each method uses dedicated CS/CSRTN pin pairs and is configured via PowerNavigator; DCR mode automatically adjusts for copper resistance drift using TMON inputs.
How many configuration profiles can be stored in the ISL68144IRAZ-T's NVM?
The ISL68144IRAZ-T includes on-chip nonvolatile memory capable of storing up to eight complete configuration profiles. These are selected at power-up via the CONFIG pin-strapping option, allowing hardware-defined variants (e.g., different VOUT, phase count, or droop settings) without firmware intervention - simplifying system-level validation and field updates.
ISL68144IRAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- PWM Controller
- Voltage - Input:
- 3.3V ~ 3.3V
- Number of Outputs:
- 2
- Voltage - Output:
- 1.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL68144IRAZ-T FAQ
1.How can I place an order for ISL68144IRAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL68144IRAZ-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 ISL68144IRAZ-T reliable?
The price and inventory of ISL68144IRAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL68144IRAZ-T is usually 5 days.
3.What payment methods are accepted for ISL68144IRAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL68144IRAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL68144IRAZ-T?
ISL68144IRAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL68144IRAZ-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 ISL68144IRAZ-T?
For technical support, including ISL68144IRAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL68144IRAZ-T requirements.
6.How does Aetrix verify that ISL68144IRAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL68144IRAZ-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 ISL68144IRAZ-T meets industry standards.
7.What is the process for return or replacement of ISL68144IRAZ-T?
All ISL68144IRAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL68144IRAZ-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 ISL68144IRAZ-T part is unused and in its original packaging.
Return procedure for ISL68144IRAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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