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Renesas ISL8026AFRTAJZ
- Part No.:
- ISL8026AFRTAJZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8026AFRTAJZ.pdf
- Description:
- IC REG BUCK ADJ 6A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,396
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Product details
Overview
ISL8026AFRTAJZ 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 ±1.5% accuracy over –40°C to +125°C. It powers FPGA core rails in industrial embedded systems requiring high efficiency and thermal robustness.
For engineers reviewing the ISL8026AFRTAJZ datasheet, ISL8026AFRTAJZ pinout, ISL8026AFRTAJZ application, or ISL8026AFRTAJZ equivalent, key selection criteria include its 2MHz fixed-frequency operation, 100% duty-cycle capability for ultra-low dropout (<180mV at 6A), internal/external compensation flexibility, and full-temperature-range (-40°C to +125°C) overvoltage, overcurrent, and thermal protection.
Technical Context
The ISL8026AFRTAJZ employs current-mode control architecture enabling fast transient response and stable loop behavior across wide load and input variations. Its dual-MOSFET integration eliminates external power switches while supporting both forced continuous conduction mode (reducing EMI) and discontinuous mode (improving light-load efficiency).
It features programmable soft-start (1ms internal or capacitor-adjustable), soft-stop output discharge during shutdown, and a dedicated 1ms power-good timer with open-drain PG output. The FS pin configures switching frequency from 500kHz to 4MHz, with default 2MHz set by connecting FS to VIN - a distinguishing trait versus the 1MHz ISL8026 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6A continuous - supports high-current FPGA, SoC, and microprocessor core rails without external current sharing. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion, 3.3V, and 5V intermediate bus architectures. |
| Default Switching Frequency | 2MHz - enables compact magnetics and low-profile designs; adjustable up to 4MHz via FS resistor or external sync. |
| Reference Voltage Accuracy | ±1.5% over –40°C to +125°C - ensures tight output regulation across extended industrial temperature range. |
| 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 and supports high-efficiency synchronous rectification. |
| Power-Good Delay | 1ms after regulation - provides deterministic system sequencing for downstream logic and memory initialization. |
Pinout & Package
ISL8026AFRTAJZ is housed in a RoHS-compliant 16-lead 3mm × 3mm TQFN package with exposed thermal pad (L16.3x3D), optimized for high-power density and thermal dissipation (θJA = 47°C/W, θJC = 6.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2,16) | Input power supply | Accepts 2.5V–5.5V; requires ≥2×22µF ceramic decoupling close to pins for stability and noise suppression. |
| PHASE (Pins 11,12,13,14,15) | Switching node | Connects directly to inductor; carries high di/dt; internal 100Ω discharge path active during shutdown. |
| PGND/SGND (Pin 10) | Signal ground reference | Separate ground for feedback and error amplifier; must be tied to exposed pad for optimal noise immunity. |
| PGND (Pins 3,11,12) | Power ground return | Low-impedance return path for high-current switching loops; requires solid copper plane connection. |
| FB (Pin 8) | Feedback input | Senses output voltage via external resistor divider; sets VOUT = 0.6V × (1 + R2/R3); monitors regulation for PG and UV/OV protection. |
| COMP (Pin 9) | Error amplifier output | Internal compensation node; connect to VIN for standard configuration or add external RC network for custom loop tuning. |
| EN (Pin 5) | Enable control | Active-high logic input; asserts soft-stop discharge of output capacitor when pulled low. |
| FS (Pin 6) | Frequency select | Resistor-to-ground sets fSW from 500kHz–4MHz; tied to VIN for factory-default 2MHz operation. |
| SS (Pin 7) | Soft-start timing | Connect to SGND for 1ms ramp; add capacitor to SGND for longer startup time (≤33nF recommended). |
| SYNC (Pin 4) | Mode/sync control | Selects PWM (high), PFM (low), or external clock sync (edge-triggered); includes 1MΩ internal pull-down. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay; requires external pull-up to VIN; signals valid regulation to host controller. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 36mΩ P-ch + 13mΩ N-ch MOSFETs reduce BOM count, improve efficiency, and eliminate gate-drive design complexity. |
| 100% Duty-Cycle Operation | Enables <180mV dropout at 6A, critical for low-VOUT applications like 0.8V FPGA cores near input rail limits. |
| Full-Temp Protection Suite | Includes hiccup-mode OCP, thermal shutdown (150°C), OV/UV lockout, and negative current limiting - no external fault management needed. |
| Flexible Compensation | Supports internal (COMP-to-VIN) or external (RC network on COMP–SGND) loop tuning for stable performance across diverse output capacitors and loads. |
| Programmable Soft-Start & Discharge | 1ms internal ramp prevents inrush; soft-stop actively discharges output during disable - avoids reverse bias on downstream components. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in modular power supplies for telecom baseband units and industrial PLCs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 0.8–3.3V at up to 6A from 3.3V or 5V intermediate bus. Use Value: High efficiency (>92% at 3.3VOUT/6A, 2MHz) and small footprint (<142mm² total solution) enable dense, thermally constrained modules. | Use Scenario: Core voltage supply for Xilinx Artix-7 FPGAs and ARM Cortex-A series microprocessors in edge AI gateways. IC Role / Device Role / Timing Role: Main core regulator with precise 0.6V reference and ±1.5% accuracy across –40°C to +125°C ambient. Use Value: 2MHz switching allows use of sub-1µH inductors and low-ESR ceramic caps, reducing board area and improving dynamic response to burst loads. |
| Video Processor/SOC Power | Industrial PCs |
Use Scenario: Powering image signal processors (ISPs) and video SoCs in machine vision cameras operating in factory environments. IC Role / Device Role / Timing Role: High-current, low-noise buck converter supplying 1.1V or 1.2V core rails with forced CCM mode to suppress RF interference near analog video paths. Use Value: SYNC pin enables seamless transition to PFM at light load for standby efficiency, while maintaining PWM under active video processing. | Use Scenario: Main 1.8V or 2.5V rail for Intel Atom-based industrial PCs deployed in uncontrolled ambient conditions. IC Role / Device Role / Timing Role: Robust, full-temperature-range regulator with thermal shutdown, overvoltage, and hiccup-mode short-circuit protection. Use Value: Extended junction temperature rating (–40°C to +125°C) and 100% duty-cycle capability ensure reliable operation during sustained CPU load in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315GJ-Z | 4A rated, 2MHz fixed, 2.5V–5.5V input, 0.6V ref, but lacks PG output and thermal shutdown hysteresis spec. | Lower current capacity; no power-good signaling - unsuitable for sequenced multi-rail systems requiring PG handshake. | Select only for cost-sensitive, lower-current applications where PG and precise thermal recovery are not required. |
| TPS546B24RVFT | 6A, 2.5V–18V input, PMBus-enabled, 0.5% ref accuracy, but larger 20-pin QFN and higher quiescent current (120µA vs 23mA in PWM mode). | Wider VIN range and digital interface support - over-specified for 5V-bus applications; adds firmware overhead and layout complexity. | Choose only if digital monitoring, telemetry, or >5.5V input is mandatory; otherwise, ISL8026AFRTAJZ offers superior simplicity and cost-per-amp. |
Compared with MP2315GJ-Z and TPS546B24RVFT, the ISL8026AFRTAJZ delivers optimal balance of 6A capability, 2MHz operation, full industrial temperature support, and integrated protection - all in a minimal 3×3mm footprint without requiring digital infrastructure or sacrificing PG functionality.
Availability
ISL8026AFRTAJZ is available at Aetrix Electronics and suitable for DC/DC POL modules, μC/FPGA power delivery, and industrial PC power subsystems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ISL8026AFRTAJZ 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 ISL8026AFRTAJZ belongs to Renesas' compact synchronous buck regulator product line, engineered for space-constrained, thermally demanding industrial and embedded applications requiring high efficiency, robust protection, and simplified design-in.
FAQ
What is the default switching frequency of the ISL8026AFRTAJZ, and how is it configured?
The ISL8026AFRTAJZ has a factory-default switching frequency of 2MHz, set by connecting the FS pin to VIN. This distinguishes it from the ISL8026 (1MHz default). Frequency can be adjusted between 500kHz and 4MHz using an external resistor from FS to GND or synchronized to an external clock via the SYNC pin. The 2MHz default enables smaller passive components and faster transient response in compact designs.
Does the ISL8026AFRTAJZ support 100% duty-cycle operation, and what is its practical benefit?
Yes, the ISL8026AFRTAJZ supports true 100% duty-cycle operation, achieving less than 180mV dropout voltage at 6A output current. This capability is essential for low-VOUT applications - such as 0.8V FPGA cores powered from a 3.3V or 5V rail - where maintaining regulation near the input voltage limit is critical. It eliminates the need for pre-regulation stages in many industrial and embedded systems.
How does the ISL8026AFRTAJZ handle thermal overload, and what is its shutdown threshold?
The ISL8026AFRTAJZ incorporates thermal shutdown protection that activates at a junction temperature of 150°C, with 25°C hysteresis to prevent oscillation. When triggered, the device halts switching and holds the output in a safe state until temperature falls below 125°C. This behavior is fully integrated - no external thermal sensor or circuitry is required - ensuring reliable operation in sealed or high-ambient-temperature industrial enclosures.
What are the key differences between the ISL8026AFRTAJZ and the ISL8026IRTAJZ?
The ISL8026AFRTAJZ and ISL8026IRTAJZ share identical topology and pinout but differ in two critical specifications: (1) default switching frequency - 2MHz vs 1MHz, and (2) temperature grade - full industrial range (–40°C to +125°C) vs standard industrial (–40°C to +85°C). Both offer 6A output and same FET RDS(on), but ISL8026AFRTAJZ is specified for higher ambient and junction temperatures, making it suitable for fanless industrial PCs and outdoor equipment.
Can the ISL8026AFRTAJZ operate in both PWM and PFM modes, and how is mode selection implemented?
Yes, the ISL8026AFRTAJZ supports both PWM and PFM (pulse-frequency modulation) modes via the SYNC pin. Driving SYNC high selects forced continuous conduction mode (PWM), minimizing output ripple and EMI - ideal for noise-sensitive analog circuits. Driving SYNC low enables discontinuous conduction mode (PFM), which improves light-load efficiency by reducing switching losses. An internal 1MΩ pull-down ensures safe default (PFM) if SYNC is left floating.
ISL8026AFRTAJZ 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:
- 1MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8026AFRTAJZ FAQ
1.How can I place an order for ISL8026AFRTAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8026AFRTAJZ 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 ISL8026AFRTAJZ reliable?
The price and inventory of ISL8026AFRTAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8026AFRTAJZ is usually 5 days.
3.What payment methods are accepted for ISL8026AFRTAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8026AFRTAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8026AFRTAJZ?
ISL8026AFRTAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8026AFRTAJZ 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 ISL8026AFRTAJZ?
For technical support, including ISL8026AFRTAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8026AFRTAJZ requirements.
6.How does Aetrix verify that ISL8026AFRTAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8026AFRTAJZ 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 ISL8026AFRTAJZ meets industry standards.
7.What is the process for return or replacement of ISL8026AFRTAJZ?
All ISL8026AFRTAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8026AFRTAJZ, 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 ISL8026AFRTAJZ part is unused and in its original packaging.
Return procedure for ISL8026AFRTAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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