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Renesas ISL8026AIRTAJZ-T
- Part No.:
- ISL8026AIRTAJZ-T
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8026AIRTAJZ-T.pdf
- Description:
- IC REG BUCK ADJ 6A 16TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL8026AIRTAJZ-T from Renesas (formerly Intersil) is a monolithic synchronous buck DC/DC regulator delivering 6A continuous output current from a 2.5V–5.5V input, featuring integrated 36mΩ P-channel and 13mΩ N-channel MOSFETs, 2MHz default switching frequency, and 0.6V reference voltage with ±1.0% accuracy over –40°C to +85°C. It powers microcontroller cores, FPGA I/O banks, and video SoCs in space-constrained industrial and portable systems.
For engineers reviewing the ISL8026AIRTAJZ-T datasheet, ISL8026AIRTAJZ-T pinout, ISL8026AIRTAJZ-T application, or ISL8026AIRTAJZ-T equivalent, key selection criteria include its 2MHz fixed-frequency PWM operation, forced-continuous/discontinuous mode control via SYNC pin, internal soft-start with 1ms ramp, power-good timing, and thermal/overcurrent protection architecture.
Technical Context
The ISL8026AIRTAJZ-T employs current-mode 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 integration eliminates external high-side drive complexity while supporting 100% duty-cycle operation for ultra-low dropout (<180mV at 6A).
It implements hiccup-mode overcurrent protection, thermal shutdown at 150°C with 25°C hysteresis, and negative current limiting (–1.5A to –4.5A), alongside programmable soft-start via SS pin and internal/external compensation options using the COMP node.
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 high-performance µC/FPGA core rails with margin for peak loads. |
| Switching Frequency | Default 2MHz (FS tied to VIN) - enables compact 0.33µH–0.68µH inductors and reduces EMI fundamental frequency. |
| Reference Voltage Accuracy | ±1.0% over –40°C to +85°C - ensures tight output regulation for sensitive digital logic supply domains. |
| High-Side RDS(on) | 36mΩ typical at 5V VIN - minimizes conduction loss and improves full-load efficiency up to 95%. |
| Low-Side RDS(on) | 13mΩ typical at 5V VIN - reduces bottom-FET loss during synchronous rectification phase. |
| Power-Good Delay | 1ms after regulation achieved - provides deterministic system reset timing for downstream logic sequencing. |
Pinout & Package
ISL8026AIRTAJZ-T is housed in a RoHS-compliant 16-lead 3mm × 3mm TQFN package with exposed thermal pad (L16.3x3D), optimized for low-inductance layout and efficient heat dissipation in high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2, 16) | Input power supply | Accepts 2.5V–5.5V input; requires ≥2×22µF ceramic decoupling close to pins for high-frequency noise suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt; internal 100Ω discharge path during shutdown prevents floating node. |
| PGND/SGND (Pin 10) | Signal/power ground reference | Separate ground return for feedback and control circuitry; must be connected to exposed pad for optimal noise immunity. |
| PGND (Pins 11, 12) | Power ground | Low-impedance return path for high-current switching loops; routed separately from SGND to minimize coupling. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); bias current <0.1µA minimizes divider error. |
| COMP (Pin 9) | Error amplifier output | Provides compensation network interface; internal compensation enabled when tied to VIN; external networks improve transient response. |
| EN (Pin 5) | Enable control | Active-high logic input; pulls output capacitor to GND via internal soft-stop switch during disable to prevent backfeed. |
| SYNC (Pin 4) | Mode selection/synchronization | Logic-high = PWM mode; logic-low = PFM mode; external clock input up to 4MHz enables system-level timing coordination. |
| FS (Pin 6) | Frequency set | Resistor-to-GND sets fSW from 500kHz–4MHz; default 2MHz when tied to VIN - critical for EMI compliance and inductor sizing. |
| SS (Pin 7) | Soft-start control | Capacitor-to-SGND adjusts ramp time; 1ms default when shorted to SGND - prevents inrush current and stabilizes startup sequence. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay; signals valid regulation; requires external pull-up to VIN for proper logic level translation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 36mΩ P-ch + 13mΩ N-ch FETs reduce BOM count, eliminate gate-drive design effort, and maximize efficiency at 6A. |
| 100% Duty-Cycle Operation | Enables <180mV dropout at 6A, supporting low-VIN applications like battery-powered systems near end-of-discharge. |
| Programmable Switching Frequency | 500kHz–4MHz range allows optimization of size (higher fSW → smaller L/C) vs. efficiency (lower fSW → lower switching loss). |
| Forced Continuous / Discontinuous Mode | SYNC pin selects between low-noise CCM (for EMI-sensitive systems) and high-efficiency DCM (for light-load battery life extension). |
| Comprehensive Protection Suite | Hiccup OCP, thermal shutdown (150°C), overvoltage, undervoltage, and negative current limiting ensure robust field reliability. |
Applications
| Microprocessor Core Power | FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Delivering tightly regulated 0.8V–1.2V at up to 6A to ARM Cortex-A series or RISC-V SoC cores in industrial gateways. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator with fast transient response to handle CPU burst loads. Use Value: ±1.0% reference accuracy and 2MHz switching maintain voltage within ±20mV under 4A step load, preventing core resets. |
Use Scenario: Powering 1.8V/2.5V/3.3V I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs in test equipment. IC Role / Device Role / Timing Role: High-current, low-noise buck converter with PFM mode for standby efficiency and PWM for active performance. Use Value: Discontinuous mode at light load achieves >85% efficiency at 10mA, extending battery runtime in portable FPGA platforms. |
| Video Processing SoC Rail | Li-ion Powered Portable Instrument |
|
Use Scenario: Generating 1.1V core and 1.8V memory rails for TI DaVinci or NXP i.MX8 processors in automotive ADAS cameras. IC Role / Device Role / Timing Role: Dual-rail POL solution with independent enable and PG signaling for coordinated power sequencing. Use Value: 1ms PG delay aligns with processor reset timing requirements, ensuring deterministic boot behavior across temperature. |
Use Scenario: Regulating 3.3V system rail from 3.0–4.2V single-cell Li-ion in handheld multimeters or spectrum analyzers. IC Role / Device Role / Timing Role: High-efficiency buck converter with 100% duty-cycle capability to sustain output down to 3.0V battery voltage. Use Value: <180mV dropout at 6A extends usable battery capacity by ~12% compared to non-100% duty-cycle alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546B24RVFT | 6A, 2.7–16V input, 3.3MHz default, PMBus-enabled, larger 20-pin QFN (4×4mm) | Requires digital configuration; suited for systems needing telemetry, margining, or dynamic voltage scaling | Select when telemetry, fault logging, or multi-rail coordination via PMBus is required - not a drop-in replacement. |
| MP2315GJ-Z | 6A, 4.5–26V input, 500kHz–2.5MHz adjustable, no PG pin, smaller 10-pin 3×3mm QFN | Lacks power-good signaling and thermal shutdown hysteresis; limited to higher-VIN applications | Choose for cost-sensitive, high-input-voltage designs where PG and precise thermal recovery are non-critical. |
Compared with TPS546B24RVFT and MP2315GJ-Z, the ISL8026AIRTAJZ-T offers superior low-VIN capability (2.5V min), integrated PG with 1ms delay, and tighter reference accuracy (±1.0%), making it optimal for battery-fed and precision sequencing applications where those features are mandatory.
Availability
ISL8026AIRTAJZ-T is available at Aetrix Electronics and suitable for microprocessor core power, FPGA I/O supply, and Li-ion powered portable instruments requiring stable component supply, consistent parametric performance, and long-term industrial-grade availability.
Supply support for ISL8026AIRTAJZ-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 Corporation acquired Intersil in 2017 and continues to develop and support its high-performance analog and power management portfolio.
The ISL8026AIRTAJZ-T belongs to Renesas' compact synchronous buck regulator family, designed specifically for space-constrained, high-current point-of-load applications in industrial, computing, and portable electronics.
FAQ
What is the default switching frequency of the ISL8026AIRTAJZ-T and how is it set?
The ISL8026AIRTAJZ-T has a default switching frequency of 2MHz, established when the FS pin is connected to VIN. This value is confirmed across –40°C to +85°C ambient and is factory-trimmed per device. The frequency can be adjusted from 500kHz to 4MHz using an external resistor from FS to GND, enabling optimization for EMI, efficiency, or component size.
Does the ISL8026AIRTAJZ-T support 100% duty-cycle operation, and what is its practical benefit?
Yes, the ISL8026AIRTAJZ-T supports true 100% duty-cycle operation, achieving less than 180mV dropout voltage at 6A output current. This enables reliable regulation even when input voltage sags close to the output level - critical for maintaining system uptime in single-cell Li-ion applications operating down to 3.0V.
How does the SYNC pin function on the ISL8026AIRTAJZ-T, and what modes does it enable?
The SYNC pin on the ISL8026AIRTAJZ-T controls operating mode: logic-high (or connection to VIN) enables PWM mode for low-noise, constant-frequency operation; logic-low enables PFM mode for improved light-load efficiency; and connection to an external clock source synchronizes switching to system timing, reducing beat frequencies and EMI peaks.
What protection features are integrated into the ISL8026AIRTAJZ-T?
The ISL8026AIRTAJZ-T integrates hiccup-mode overcurrent protection, thermal shutdown at 150°C with 25°C hysteresis, overvoltage and undervoltage protection, and negative current limiting (–1.5A to –4.5A). These features collectively prevent damage during short circuits, overheating, input transients, and reverse-current conditions in real-world deployments.
Can the ISL8026AIRTAJZ-T be used with internal compensation, and what is required to enable it?
Yes, the ISL8026AIRTAJZ-T supports internal compensation, which is enabled by connecting the COMP pin directly to VIN. In this configuration, the internal transconductance amplifier and compensation network are activated, eliminating the need for external RC components and simplifying layout - ideal for standard 0.8V–3.3V output designs.
ISL8026AIRTAJZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 490kHz ~ 4.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8026AIRTAJZ-T FAQ
1.How can I place an order for ISL8026AIRTAJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8026AIRTAJZ-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 ISL8026AIRTAJZ-T reliable?
The price and inventory of ISL8026AIRTAJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8026AIRTAJZ-T is usually 5 days.
3.What payment methods are accepted for ISL8026AIRTAJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8026AIRTAJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8026AIRTAJZ-T?
ISL8026AIRTAJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8026AIRTAJZ-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 ISL8026AIRTAJZ-T?
For technical support, including ISL8026AIRTAJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8026AIRTAJZ-T requirements.
6.How does Aetrix verify that ISL8026AIRTAJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8026AIRTAJZ-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 ISL8026AIRTAJZ-T meets industry standards.
7.What is the process for return or replacement of ISL8026AIRTAJZ-T?
All ISL8026AIRTAJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8026AIRTAJZ-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 ISL8026AIRTAJZ-T part is unused and in its original packaging.
Return procedure for ISL8026AIRTAJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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