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Renesas ISL8026FRTAJZ
- Part No.:
- ISL8026FRTAJZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8026FRTAJZ.pdf
- Description:
- IC REG BUCK ADJ 6A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
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Product details
Overview
ISL8026FRTAJZ from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering 6A continuous output current from a 2.5V–5.5V input, featuring integrated 36mΩ P-channel and 13mΩ N-channel MOSFETs, 1MHz default switching frequency, and operation up to +125°C ambient. It supports forced continuous or discontinuous conduction mode, delivers 1ms power-good assertion, and enables low-dropout operation with 100% duty cycle capability - ideal for powering FPGA core rails in industrial embedded systems.
For engineers reviewing the ISL8026FRTAJZ datasheet, ISL8026FRTAJZ pinout, ISL8026FRTAJZ application, or ISL8026FRTAJZ equivalent, key selection criteria include its -40°C to +125°C temperature rating, internal/external compensation flexibility, soft-start/soft-stop control, hiccup-mode overcurrent protection, and compatibility with compact 3×3 mm TQFN layouts requiring minimal external components.
Technical Context
The ISL8026FRTAJZ employs current-mode PWM control with slope compensation for stable high-frequency operation up to 4MHz, enabling fast transient response and robust loop stability across wide load and line variations. Its dual-MOSFET architecture integrates low-RDS(on) switches optimized for high efficiency at 6A - achieving up to 95% peak efficiency at 3.3VIN/1.8VOUT.
It features programmable frequency (500kHz–4MHz), selectable via resistor on FS pin, with factory-default 1MHz for ISL8026 variants. The device includes comprehensive fault protection: hiccup-mode overcurrent, thermal shutdown at 150°C, overvoltage and undervoltage monitoring via FB, and negative current limiting down to -3.0A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| Output Current | 6A continuous - sufficient for mid-tier FPGA, SoC, or DSP core supplies with margin. |
| Switching Frequency | Programmable 0.5–4MHz; default 1MHz - balances efficiency, size, and EMI for space-constrained designs. |
| Reference Accuracy | ±1.5% over -40°C to +125°C - ensures tight output regulation across full industrial temperature range. |
| ON-Resistance (HS/LG) | 36mΩ / 13mΩ typical - minimizes conduction loss and improves thermal performance at full load. |
| Power-Good Delay | 1ms after regulation - provides deterministic system sequencing for downstream logic and memory. |
| Thermal Shutdown | 150°C with 25°C hysteresis - prevents damage during sustained overload or poor heatsinking. |
Pinout & Package
ISL8026FRTAJZ is housed in a RoHS-compliant, thermally enhanced 16-lead 3×3 mm TQFN package with exposed pad (L16.3x3D), optimized for high-current DC/DC conversion in space-constrained industrial and computing applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2,16) | Input supply rail | Accepts 2.5–5.5V; requires ≥2×22µF local ceramic decoupling to PGND for stability. |
| PG (Pin 3) | Open-drain power-good indicator | Asserts after 1ms delay when VOUT reaches regulation; requires external pull-up to VIN. |
| SYNC (Pin 4) | Mode selection/synchronization input | Configures PWM/PSM mode or accepts external clock up to 4MHz for EMI reduction. |
| EN (Pin 5) | Enable control | Active-high logic; pulls output low and discharges VOUT capacitor via internal soft-stop switch when disabled. |
| FS (Pin 6) | Frequency set resistor node | Connects to GND via RFS to program fSW from 500kHz to 4MHz; defaults to 1MHz when tied to VIN. |
| SS (Pin 7) | Soft-start timing control | 1ms internal ramp when shorted to SGND; adjustable via external capacitor (≤33nF) for controlled startup. |
| FB (Pin 8) | Feedback voltage sense | Monitors output via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); used for UV/OV detection. |
| COMP (Pin 9) | Error amplifier output | Internal compensation node; must connect to VIN in internal-compensation mode per Figure 1. |
| PGND/SGND (Pin 10) | Power/signal ground reference | Common return for feedback, soft-start, and compensation; separates analog and power grounds. |
| PGND (Pins 11,12) | Power ground return | Low-impedance path for high di/dt currents from low-side FET and input/output capacitors. |
| PHASE (Pins 13–15) | Switching node | Connects to inductor; carries high-frequency AC current; discharged via 100Ω resistor during shutdown. |
| Exposed Pad | Thermal and electrical ground | Mandatory connection to SGND plane via multiple vias for thermal dissipation and noise control. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables <180mV dropout at 6A - critical for low-VIN/VOUT applications like battery-powered systems. |
| Integrated MOSFETs | 36mΩ HS / 13mΩ LS FETs reduce BOM count and PCB area while maximizing efficiency at full load. |
| Soft-Stop Output Discharge | Internally discharges VOUT capacitor on disable - eliminates need for external bleed circuitry. |
| Adjustable Frequency | 500kHz–4MHz tuning allows optimization of inductor size, efficiency, and EMI profile per design needs. |
| Hiccup-Mode OCP | Auto-retry current limiting protects against sustained shorts without thermal runaway or latch-up. |
| Wide Temp Rating | -40°C to +125°C ambient operation - qualified for harsh industrial environments and extended thermal margins. |
Applications
| FPGA Core Power Supply | Industrial PC CPU Rail |
|---|---|
|
Use Scenario: Providing tightly regulated 0.8–1.2V core voltage to Xilinx Artix-7 or Intel Cyclone V FPGA under dynamic load transients. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with fast transient response and 1ms power-good signaling for configuration sequencing. Use Value: Delivers 6A continuous current with ±1.5% reference accuracy across -40°C to +125°C, ensuring reliable bitstream loading and logic operation. |
Use Scenario: Generating 1.05V/5A CPU I/O rail in fanless industrial PCs operating in uncontrolled ambient environments. IC Role / Device Role / Timing Role: High-efficiency step-down converter with thermal shutdown and hiccup-mode OCP for long-term reliability. Use Value: 95% peak efficiency at 3.3VIN/1.05VOUT reduces thermal load; 3×3 mm TQFN footprint saves board space in dense layouts. |
| Li-ion Powered Test Equipment | Ruggedized Network Router PoL |
|
Use Scenario: Converting 3.0–4.2V single-cell Li-ion battery output to stable 1.8V for ADC/DAC signal chain in portable test instruments. IC Role / Device Role / Timing Role: Battery-optimized buck regulator supporting PFM mode at light loads and 100% duty cycle near end-of-discharge. Use Value: Maintains regulation down to 2.5VIN; soft-stop discharge prevents floating outputs during battery swap or deep sleep. |
Use Scenario: Point-of-load conversion from 5V intermediate bus to 3.3V/6A for Ethernet PHY and switch fabric in DIN-rail mounted routers. IC Role / Device Role / Timing Role: Industrial-grade POL regulator with robust ESD (3kV HBM), overtemperature, and overvoltage protection. Use Value: -40°C to +125°C rating ensures uptime in outdoor cabinets; SYNC pin enables spread-spectrum clocking to meet EN55022 Class B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 3A rated, 2.5–5.5V input, fixed 1.2MHz fSW, no PG or soft-stop; smaller 8-pin SOIC package. | Limited to lower-current applications; lacks power-good signaling and output discharge - unsuitable for FPGA sequencing or battery systems. | Select only for cost-sensitive, low-power (<3A), non-sequencing applications where board space permits larger package. |
| TPS546B24RVFT | 6A, 3–18V input, PMBus interface, 500kHz–2MHz fSW, integrated telemetry, but larger 28-pin QFN. | Supports digital monitoring and dynamic voltage scaling; higher VIN range adds complexity for 5V-only systems. | Choose when telemetry, remote configuration, or >5.5V input is required - not a drop-in replacement due to pinout and control interface differences. |
Compared with MP2315DJ-LF-Z and TPS546B24RVFT, the ISL8026FRTAJZ offers optimal balance of 6A capability, industrial temperature support, analog control simplicity, and compact 3×3 mm footprint - making it ideal for fixed-function, high-reliability POL designs where digital overhead is unnecessary.
Availability
ISL8026FRTAJZ is available at Aetrix Electronics and suitable for FPGA core power, industrial PC CPU rails, and Li-ion powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL8026FRTAJZ 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 Corporation, formed from the merger of Renesas Technology and NEC Electronics, is a global leader in microcontrollers, analog, power management, and SoC solutions for industrial, automotive, and infrastructure markets.
The ISL8026FRTAJZ belongs to Renesas' high-efficiency monolithic buck regulator product line, designed specifically for space-constrained, thermally demanding point-of-load applications in industrial automation, communications infrastructure, and embedded computing.
FAQ
What is the maximum operating junction temperature for the ISL8026FRTAJZ?
The ISL8026FRTAJZ has a specified junction temperature range of -55°C to +125°C, with thermal shutdown activating at +150°C (rising threshold) and 25°C hysteresis. This allows safe operation in high-ambient industrial environments when properly heatsinked via the exposed pad to SGND.
Does the ISL8026FRTAJZ support external synchronization, and what is the maximum input frequency?
Yes, the ISL8026FRTAJZ supports external synchronization via the SYNC pin, accepting positive-edge-triggered clock signals up to 4MHz. This enables EMI reduction through frequency alignment with system clocks or spread-spectrum sources - a capability confirmed in the datasheet's "Frequency Adjust" section.
How does the soft-start function work on the ISL8026FRTAJZ, and can it be adjusted?
The ISL8026FRTAJZ provides a 1ms internal soft-start when SS is connected to SGND. For longer ramps, an external capacitor (≤33nF) between SS and SGND extends the time linearly - e.g., 10nF yields ~3.3ms. This prevents inrush current and ensures controlled VOUT ramp-up during power-on.
What protection features are integrated into the ISL8026FRTAJZ?
The ISL8026FRTAJZ integrates hiccup-mode overcurrent protection, overvoltage and undervoltage detection (via FB), thermal shutdown at 150°C, negative current limiting (-3.0A), and soft-stop output discharge on disable. These functions are fully documented in the "Fault Protection" and "Electrical Specifications" sections of FN8736 Rev 2.00.
Is the ISL8026FRTAJZ pin-compatible with the ISL8026AIRTAJZ, and what is the key functional difference?
No - the ISL8026FRTAJZ and ISL8026AIRTAJZ are not pin-compatible replacements. While both share identical pinout and package, they differ in default switching frequency (1MHz vs. 2MHz) and temperature grade (-40°C to +125°C vs. -40°C to +85°C). Substituting requires verifying loop stability and thermal margin at the new fSW.
ISL8026FRTAJZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 500kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8026FRTAJZ FAQ
1.How can I place an order for ISL8026FRTAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8026FRTAJZ 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 ISL8026FRTAJZ reliable?
The price and inventory of ISL8026FRTAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8026FRTAJZ is usually 5 days.
3.What payment methods are accepted for ISL8026FRTAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8026FRTAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8026FRTAJZ?
ISL8026FRTAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8026FRTAJZ 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 ISL8026FRTAJZ?
For technical support, including ISL8026FRTAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8026FRTAJZ requirements.
6.How does Aetrix verify that ISL8026FRTAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8026FRTAJZ 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 ISL8026FRTAJZ meets industry standards.
7.What is the process for return or replacement of ISL8026FRTAJZ?
All ISL8026FRTAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8026FRTAJZ, 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 ISL8026FRTAJZ part is unused and in its original packaging.
Return procedure for ISL8026FRTAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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