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Renesas ISL8026FRTAJZ-T
- Part No.:
- ISL8026FRTAJZ-T
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8026FRTAJZ-T.pdf
- Description:
- IC REG BUCK ADJ 6A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,588
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Product details
Overview
ISL8026FRTAJZ-T from Renesas (formerly Intersil) is a monolithic synchronous buck 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 ±1.5% 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 ISL8026FRTAJZ-T datasheet, ISL8026FRTAJZ-T pinout, ISL8026FRTAJZ-T application, or ISL8026FRTAJZ-T equivalent, key selection criteria include its extended temperature rating (–40°C to +125°C), 100% duty-cycle capability for ultra-low dropout, internal/external compensation flexibility, and hiccup-mode overcurrent protection with soft-stop output discharge.
Technical Context
The ISL8026FRTAJZ-T employs current-mode control architecture enabling fast transient response and stable loop behavior at high frequencies. Its integrated power stage supports forced continuous conduction mode (CCM) or discontinuous conduction mode (DCM) via SYNC pin configuration, directly impacting EMI profile and light-load efficiency.
It implements comprehensive fault protection including hiccup-mode overcurrent limiting, thermal shutdown at 150°C with 25°C hysteresis, overvoltage and undervoltage monitoring on FB, and negative current detection down to –4.5A. The 1ms power-good timer and soft-start ramp ensure controlled system sequencing.
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 powering mid-range FPGA cores, SoC I/O banks, or video processors. |
| Reference Voltage | 0.600V ±1.5% (–40°C to +125°C) - enables precise low-voltage regulation down to 0.6V with external resistor divider. |
| Switching Frequency | Default 1MHz (FS tied to VIN); adjustable 500kHz–4MHz - balances efficiency, size, and EMI in space-constrained designs. |
| Efficiency | Up to 95% - achieved via low RDS(on) FETs (36mΩ HS / 13mΩ LS) minimizing conduction losses. |
| Duty Cycle | 100% - delivers <180mV dropout at 6A, critical for near-input-output rail applications. |
| Thermal Rating | Junction temp range –55°C to +125°C; package θJA = 47°C/W - validated for full-range industrial operation with standard PCB copper. |
Pinout & Package
ISL8026FRTAJZ-T is housed in a RoHS-compliant, thermally enhanced 16-lead 3mm × 3mm TQFN package with exposed pad (L16.3x3D), optimized for minimal footprint (<142mm² total solution area) and efficient heat dissipation via direct SGND connection through multiple vias.
| 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 ripple suppression. |
| PHASE (Pins 11, 12, 13, 14, 15) | Switching node | Connects to inductor high-side terminal; internally discharged via 100Ω resistor during shutdown to prevent floating node. |
| PGND/SGND (Pin 10) | Power/signal ground reference | Single-point star ground tie for feedback and control circuitry; critical for noise immunity and PG accuracy. |
| PGND (Pins 3, 11, 12) | Power ground return | Low-impedance path for high di/dt currents from HS/LF FETs; must be separated from SGND except at PGND/SGND tie point. |
| FB (Pin 8) | Feedback input | Monitors output voltage via resistor divider; also used by UV/OV protection and PG circuitry. |
| COMP (Pin 9) | Error amplifier output | External compensation node; connect to VIN for internal compensation or add RC network for custom loop tuning. |
| EN (Pin 5) | Enable control | Active-high logic input; pulls output capacitor to GND via internal soft-stop switch when disabled. |
| FS (Pin 6) | Frequency select | Sets switching frequency via resistor to GND; default 1MHz when tied to VIN - matches ISL8026 (not ISL8026A). |
| SS (Pin 7) | Soft-start timing | 1ms internal ramp when shorted to SGND; add capacitor for longer ramp to limit inrush current. |
| SYNC (Pin 4) | Mode control/synchronization | Selects PWM (high), PFM (low), or external sync (edge-triggered); includes 1MΩ internal pull-down. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after VOUT reaches regulation; requires external pull-up to VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 36mΩ P-ch HS + 13mΩ N-ch LS FETs reduce BOM count and improve efficiency vs discrete solutions. |
| 100% Duty-Cycle Operation | Enables <180mV dropout at 6A, supporting applications where VOUT must approach VIN closely (e.g., battery backup rails). |
| Programmable Switching Frequency | 500kHz–4MHz range allows optimization of inductor size, efficiency, and EMI filtering requirements per design. |
| Soft-Stop Output Discharge | Internally discharges output capacitor during disable, preventing unintended downstream device power-up or latch-up. |
| Full Protection Suite | Hiccup OCP, thermal shutdown (150°C), OV/UV on FB, and negative current sensing protect against fault conditions without external components. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in modular telecom power systems with tight board space and thermal constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable 1.2V/6A to FPGA fabric under dynamic load transients. Use Value: 95% peak efficiency and 100% duty cycle minimize heat generation and enable compact heatsink-free designs. | Use Scenario: Core voltage supply for industrial-grade microcontrollers operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Main DC/DC converter regulating 0.9V–1.8V core rails with precise 0.6V reference and ±1.5% accuracy over full temperature range. Use Value: Extended temperature qualification and hiccup-mode OCP ensure reliable startup and sustained operation in harsh environments. |
| Video Processor/SOC Power | Li-ion Battery Powered Devices |
Use Scenario: Powering vision-processing SoCs in edge AI cameras requiring low-noise, high-transient-response rails. IC Role / Device Role / Timing Role: High-bandwidth buck regulator supplying 1.1V/4A to SoC CPU clusters with fast load-step response (<10µs recovery). Use Value: Current-mode control and 1MHz default frequency deliver sub-100mV output deviation during 4A load steps. | Use Scenario: Single-cell Li-ion (3.0V–4.2V) to 3.3V system rail in portable test equipment with strict battery life targets. IC Role / Device Role / Timing Role: Efficient step-down regulator operating in PFM mode at light loads to extend runtime, switching to PWM under active load. Use Value: Dual-mode operation (SYNC-selectable) achieves >85% efficiency at 10mA while maintaining >90% at 2A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8026IRTAJZ-T | Same silicon, but rated for –40°C to +85°C junction temperature (vs. +125°C for ISL8026FRTAJZ-T). | Not suitable for full-range industrial or under-hood automotive applications requiring >85°C ambient operation. | Select ISL8026FRTAJZ-T when operating ambient exceeds 85°C or junction must remain ≤125°C under full load and worst-case airflow. |
| TPS546B24RVFT | 6A PMBus-enabled buck with 4.5V–18V input, higher Vin range, digital interface, and lower quiescent current (12µA). | Requires PMBus host and layout for digital communication; lacks 100% duty cycle and PFM mode. | Choose TPS546B24RVFT only if telemetry, margining, or multi-rail coordination via PMBus is required - not a drop-in replacement. |
Compared with ISL8026IRTAJZ-T, the ISL8026FRTAJZ-T provides guaranteed operation up to +125°C junction, making it essential for high-ambient industrial deployments; versus TPS546B24RVFT, it offers simpler analog control, lower cost, and 100% duty cycle - but no digital configurability or wide-input capability.
Availability
ISL8026FRTAJZ-T is available at Aetrix Electronics and suitable for industrial PCs, portable instruments, and test and measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL8026FRTAJZ-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, formed from the merger of Renesas Technology and NEC Electronics, is a global leader in microcontrollers, analog, and power management ICs, with deep expertise in high-efficiency DC/DC conversion.
The ISL8026 product line was originally developed by Intersil (acquired by Renesas in 2017) to address space-constrained, thermally demanding industrial and computing applications requiring high-current, high-efficiency, and extended-temperature synchronous buck regulation.
FAQ
What is the maximum junction temperature specification for the ISL8026FRTAJZ-T?
The ISL8026FRTAJZ-T has a maximum junction temperature of +125°C, with thermal shutdown activating at 150°C and 25°C hysteresis. This extended rating distinguishes it from the ISL8026IRTAJZ-T (+85°C max ambient) and validates its use in full-range industrial environments where ambient temperatures exceed 85°C. The ISL8026FRTAJZ-T's thermal resistance (θJA = 47°C/W) ensures safe operation under 6A load with standard 2oz copper PCB layout.
Does the ISL8026FRTAJZ-T support both PWM and PFM modes, and how is mode selection implemented?
Yes, the ISL8026FRTAJZ-T supports both PWM and PFM modes via the SYNC pin: logic high (or VIN) enables PWM for lowest noise and best load-transient performance; logic low enables PFM for highest light-load efficiency. An internal 1MΩ pull-down prevents floating states. This dual-mode capability makes the ISL8026FRTAJZ-T suitable for battery-powered devices where runtime and EMI must be balanced - unlike fixed-PWM-only regulators.
How does the soft-stop function operate in the ISL8026FRTAJZ-T during shutdown?
When the EN pin is driven low, the ISL8026FRTAJZ-T activates an internal soft-stop switch that actively discharges the output capacitor through a controlled path, preventing residual voltage from powering downstream circuitry or causing latch-up. This behavior is confirmed in the datasheet's "Discharge Mode (Soft-Stop)" section and differentiates the ISL8026FRTAJZ-T from buck regulators requiring external discharge FETs or resistors.
What is the default switching frequency of the ISL8026FRTAJZ-T, and how is it configured?
The ISL8026FRTAJZ-T defaults to 1MHz switching frequency when the FS pin is connected to VIN - a key identifier distinguishing it from the ISL8026A family (2MHz default). Frequency can be adjusted from 500kHz to 4MHz using an external resistor from FS to GND. This 1MHz baseline optimizes inductor size, efficiency, and EMI filter complexity for most industrial POL applications.
Can the ISL8026FRTAJZ-T regulate output voltages below 0.6V?
No - the ISL8026FRTAJZ-T has a fixed 0.600V internal reference voltage, and the feedback divider sets VOUT = 0.6V × (1 + R2/R3). Therefore, the minimum regulated output is 0.6V (when R2 = 0). While some applications may use external biasing tricks, the datasheet specifies 0.6V as the lower limit for guaranteed accuracy and stability. For sub-0.6V rails, a different regulator with adjustable reference or external reference injection is required.
ISL8026FRTAJZ-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:
- 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-T FAQ
1.How can I place an order for ISL8026FRTAJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8026FRTAJZ-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 ISL8026FRTAJZ-T reliable?
The price and inventory of ISL8026FRTAJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8026FRTAJZ-T is usually 5 days.
3.What payment methods are accepted for ISL8026FRTAJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8026FRTAJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8026FRTAJZ-T?
ISL8026FRTAJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8026FRTAJZ-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 ISL8026FRTAJZ-T?
For technical support, including ISL8026FRTAJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8026FRTAJZ-T requirements.
6.How does Aetrix verify that ISL8026FRTAJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8026FRTAJZ-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 ISL8026FRTAJZ-T meets industry standards.
7.What is the process for return or replacement of ISL8026FRTAJZ-T?
All ISL8026FRTAJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8026FRTAJZ-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 ISL8026FRTAJZ-T part is unused and in its original packaging.
Return procedure for ISL8026FRTAJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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