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Renesas ISL8026IRTAJZ
- Part No.:
- ISL8026IRTAJZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8026IRTAJZ.pdf
- Description:
- IC REG BUCK ADJ 6A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,393
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Product details
Overview
ISL8026IRTAJZ from Renesas (formerly Intersil) is a monolithic synchronous buck DC/DC regulator delivering up to 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 0.6V reference voltage with ±1% accuracy over –40°C to +85°C. It powers microcontrollers, FPGAs, and SoCs in space-constrained industrial and portable systems.
For engineers reviewing the ISL8026IRTAJZ datasheet, ISL8026IRTAJZ pinout, ISL8026IRTAJZ application, or ISL8026IRTAJZ equivalent, key selection criteria include its 16-pin 3×3mm TQFN package, internal/external compensation flexibility, forced-continuous or discontinuous light-load operation, hiccup-mode overcurrent protection, and soft-start/soft-stop discharge functionality.
Technical Context
The ISL8026IRTAJZ employs current-mode control with slope compensation for stable high-frequency operation up to 4MHz and fast transient response. Its integrated power stage supports 100% duty-cycle operation, enabling <180mV dropout at 6A load-critical for low-VOUT applications like 0.8V core rails.
It features dual operating modes: PWM (via SYNC high) for low-noise regulation and PFM (via SYNC low) for light-load efficiency optimization. Fault protection includes hiccup-mode overcurrent, thermal shutdown at 150°C, overvoltage, undervoltage, and negative current limiting-enabling robust deployment in unattended embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, 3.3V/5V system rails, and intermediate bus architectures. |
| Output Current | 6A continuous - sufficient for mid-tier FPGA I/O banks or dual-core application processors. |
| Switching Frequency | Default 1MHz (FS tied to VIN) - balances efficiency, size, and EMI; adjustable 500kHz–4MHz via external resistor. |
| Reference Voltage | 0.600V ±1% (–40°C to +85°C) - enables precise low-VOUT regulation down to 0.6V with external resistor divider. |
| Power FET RDS(on) | P-ch 36mΩ / N-ch 13mΩ (typ.) - minimizes conduction loss and improves full-load efficiency up to 95%. |
| Protection Features | Hiccup OCP, thermal shutdown (150°C), overvoltage, undervoltage, and negative current limit - ensures autonomous fault recovery without external circuitry. |
| Soft-Start Time | 1ms (SS tied to SGND) - prevents inrush current during power-up; adjustable via capacitor on SS pin. |
Pinout & Package
ISL8026IRTAJZ is housed in a RoHS-compliant 16-lead 3mm × 3mm × 0.8mm TQFN package with exposed thermal pad (EPAD), optimized for high-power density and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2,16) | Input supply rail | 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) | Switch node | Connects directly to inductor; carries high di/dt; internal 100Ω discharge path when disabled. |
| PGND/SGND (Pin 10) | Signal ground reference | Separate ground return for feedback and error amplifier; must be connected to EPAD for optimal noise immunity. |
| PGND (Pins 3,11,12) | Power ground | High-current return path for MOSFETs; low-inductance connection to input/output capacitors required. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); bias current <0.1µA. |
| COMP (Pin 7) | Error amplifier output | Internal compensation node; connect to VIN for standard configuration; external network optional for custom loop tuning. |
| EN (Pin 5) | Enable control | Active-high logic input; pulls output low and discharges VOUT via internal soft-stop switch when disabled. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after regulation; signals valid VOUT to downstream sequencers or processors. |
| FS (Pin 6) | Frequency select | Resistor-to-GND sets fSW from 500kHz to 4MHz; default 1MHz when tied to VIN per ordering code. |
| SYNC (Pin 4) | Mode control/sync input | Selects PWM (high), PFM (low), or external clock sync (edge-triggered); internal 1MΩ pull-down prevents floating. |
| SS (Pin 7) | Soft-start timing | 1ms internal ramp when grounded; capacitor to SGND extends ramp time linearly (≤33nF recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 36mΩ P-ch + 13mΩ N-ch MOSFETs reduce BOM count and improve efficiency vs discrete solutions. |
| 100% Duty-Cycle Operation | Enables ultra-low dropout (<180mV @ 6A), supporting VOUT as low as 0.6V from near-rail inputs. |
| Configurable Light-Load Mode | Forced continuous (PWM) reduces EMI; discontinuous (PFM) boosts light-load efficiency by eliminating switching losses. |
| Comprehensive Fault Protection | Hiccup OCP, thermal shutdown, OV/UV lockout, and negative current limit eliminate need for external supervision ICs. |
| Flexible Compensation | Internal compensation simplifies design; external COMP network allows fine-tuning for diverse output capacitor types and loads. |
Applications
| Microcontroller Core Supply | FPGA I/O Bank Power |
|---|---|
|
Use Scenario: Providing clean, tightly regulated 0.8V–1.2V to ARM Cortex-A/M 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 dynamic CPU load steps. Use Value: 1MHz switching and current-mode control deliver <±1% output regulation under 6A step loads, minimizing voltage droop and ensuring reliable boot and execution. |
Use Scenario: Powering 1.8V or 2.5V I/O banks on Xilinx Artix-7 or Intel MAX 10 FPGAs in test equipment. IC Role / Device Role / Timing Role: High-current, low-noise POL converter with programmable frequency to avoid interference with high-speed serial links. Use Value: Adjustable 500kHz–4MHz fSW enables EMI filtering optimization; soft-start prevents I/O bank latch-up during power sequencing. |
| Li-ion Powered Portable Instrument | Industrial PC Power Rail |
|
Use Scenario: Regulating 3.3V from a 3.6V nominal Li-ion battery in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: Efficient buck converter with PFM mode to extend battery runtime at standby currents <10mA. Use Value: Up to 95% peak efficiency and <50µA quiescent current in PFM mode maximize operational time between charges. |
Use Scenario: Generating 5V or 3.3V auxiliary rails for PCIe slots, USB controllers, and fan drivers in rugged IPCs. IC Role / Device Role / Timing Role: Robust, thermally capable POL regulator with hiccup OCP and thermal shutdown for unattended 24/7 operation. Use Value: Exposed pad + 47°C/W θJA enables >6A delivery in 70°C ambient without derating; PG signal coordinates system-level power sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8026AIRTAJZ | Default 2MHz switching frequency; identical pinout, package, and feature set. | Better suited for ultra-compact designs requiring smaller inductors/capacitors; higher switching loss at full load. | Select ISL8026AIRTAJZ when board area is constrained and 2MHz operation meets EMI requirements. |
| TPS54620RGYR | TI part with 6A rating, 500kHz–4MHz adjustable fSW, but uses external high-side FET driver and requires external bootstrap capacitor. | Higher external component count; lacks integrated soft-stop discharge and 100% duty cycle capability. | Choose TPS54620RGYR only if design requires external MOSFET control or compatibility with TI's WEBENCH ecosystem. |
Compared with ISL8026AIRTAJZ, the ISL8026IRTAJZ offers lower switching loss at 1MHz for thermally sensitive applications; versus TPS54620RGYR, it delivers higher integration, simpler layout, and guaranteed 100% duty-cycle operation-reducing design risk and validation effort.
Availability
ISL8026IRTAJZ is available at Aetrix Electronics and suitable for microcontroller core supplies, FPGA I/O power, and Li-ion portable instruments requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ISL8026IRTAJZ 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, and power management ICs, serving automotive, industrial, and infrastructure markets.
The ISL8026IRTAJZ belongs to Renesas' high-efficiency monolithic buck regulator product line, designed specifically for space-constrained, high-current point-of-load applications in industrial and portable electronics where thermal performance and integration are critical.
FAQ
What is the default switching frequency of the ISL8026IRTAJZ?
The ISL8026IRTAJZ has a factory-set default switching frequency of 1MHz, achieved by connecting the FS pin to VIN. This value is confirmed in the Ordering Information table (Page 4) and Electrical Specifications (Page 7), where fSW = 780–1200kHz across temperature for the ISL8026 variant. The ISL8026IRTAJZ is the industrial-grade 1MHz version of the ISL8026 family.
Does the ISL8026IRTAJZ support 100% duty-cycle operation, and what is its practical benefit?
Yes, the ISL8026IRTAJZ supports true 100% duty-cycle operation, enabling output voltages approaching the input rail-critical for low-dropout applications. At 6A load, it achieves <180mV dropout, allowing stable 0.8V output from a 3.6V Li-ion source. This capability is explicitly stated in the datasheet introduction and verified in the PHASE section of Electrical Specifications.
How does the ISL8026IRTAJZ handle light-load efficiency, and what modes are available?
The ISL8026IRTAJZ offers two configurable light-load modes via the SYNC pin: forced continuous conduction mode (CCM) when SYNC is high (reducing EMI), and pulse-frequency modulation (PFM) when SYNC is low (improving efficiency below ~1A). PFM mode reduces quiescent current to 50µA, extending battery life in portable devices-data confirmed in the Electrical Specifications table (Page 6).
What protection features are integrated into the ISL8026IRTAJZ?
The ISL8026IRTAJZ integrates hiccup-mode overcurrent protection, thermal shutdown at 150°C (with 25°C hysteresis), overvoltage and undervoltage lockout, and negative current limiting. These functions are detailed in the "Fault Protection" section (Page 1) and Electrical Specifications (Page 7), eliminating the need for external supervision circuits in most industrial and embedded deployments of the ISL8026IRTAJZ.
Can the ISL8026IRTAJZ be used with external compensation, and what is the transconductance specification?
Yes, the ISL8026IRTAJZ supports both internal and external compensation via the COMP pin. When configured for external compensation, its error amplifier transconductance is 120µA/V (vs. 60µA/V for internal mode), enabling precise loop tuning for varied output capacitor ESR and load dynamics. This parameter is specified in the Compensation section (Page 7) of the ISL8026IRTAJZ datasheet.
ISL8026IRTAJZ 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:
- 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)
ISL8026IRTAJZ FAQ
1.How can I place an order for ISL8026IRTAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8026IRTAJZ 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 ISL8026IRTAJZ reliable?
The price and inventory of ISL8026IRTAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8026IRTAJZ is usually 5 days.
3.What payment methods are accepted for ISL8026IRTAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8026IRTAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8026IRTAJZ?
ISL8026IRTAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8026IRTAJZ 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 ISL8026IRTAJZ?
For technical support, including ISL8026IRTAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8026IRTAJZ requirements.
6.How does Aetrix verify that ISL8026IRTAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8026IRTAJZ 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 ISL8026IRTAJZ meets industry standards.
7.What is the process for return or replacement of ISL8026IRTAJZ?
All ISL8026IRTAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8026IRTAJZ, 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 ISL8026IRTAJZ part is unused and in its original packaging.
Return procedure for ISL8026IRTAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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