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Renesas ISL8025AIRTAJZ-T
- Part No.:
- ISL8025AIRTAJZ-T
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8025AIRTAJZ-T.pdf
- Description:
- IC REG BUCK ADJ 5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,890
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Product details
Overview
ISL8025AIRTAJZ-T from Renesas Electronics is a monolithic synchronous buck regulator delivering 5A continuous output current from 2.7V–5.5V input, featuring integrated 36mΩ P-channel and 13mΩ N-channel MOSFETs, 2MHz default switching frequency, 0.6V reference voltage with 0.8% accuracy, and 100% duty-cycle operation enabling <180mV dropout at 5A - used in point-of-load power for FPGAs and microcontrollers.
For engineers reviewing the ISL8025AIRTAJZ-T datasheet, ISL8025AIRTAJZ-T pinout, ISL8025AIRTAJZ-T application, or ISL8025AIRTAJZ-T equivalent, key selection criteria include its 2MHz fixed-frequency PWM mode, internal/external compensation flexibility, soft-start/soft-stop control, hiccup-mode overcurrent protection, and thermal shutdown with 150°C trip point.
Technical Context
The ISL8025AIRTAJZ-T employs current-mode control architecture for fast transient response and stable loop behavior across 500kHz–4MHz adjustable switching frequencies. Its dual-MOSFET power stage supports forced continuous conduction mode (CCM) to suppress EMI or discontinuous conduction mode (DCM) to maximize light-load efficiency.
Fault management includes hiccup-mode current limiting during short circuits, ±200mA zero-cross detection for negative current sensing, overvoltage protection triggered at 0.80V on PG, under-voltage lockout at 2.7V (rising), and thermal shutdown with 25°C hysteresis - all integrated without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5A continuous - supports high-current FPGA core rails without external power stages |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion, USB PD, and intermediate bus architectures |
| Default Switching Frequency | 2MHz - enables compact 0.33µH–0.68µH inductors and reduces output ripple without increasing EMI filter size |
| Reference Voltage Accuracy | ±0.8% over temperature/load/line - ensures tight output regulation for sensitive digital loads |
| Power-Good Delay | 1ms after regulation - provides deterministic system sequencing for µP/FPGA reset timing |
| Thermal Shutdown Threshold | 150°C with 25°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking |
| Soft-Start Time | 1ms (internal) or adjustable via SS capacitor - prevents inrush current into large output capacitors |
Pinout & Package
ISL8025AIRTAJZ-T uses a 16-lead 3mm × 3mm TQFN package with exposed thermal pad, 1mm max height, and RoHS-compliant matte tin termination. The exposed pad must be soldered to SGND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1,16) | Input supply rail | Accepts 2.7V–5.5V; requires ≥2×22µF ceramic decoupling close to pins |
| PHASE (13–15) | Switching node | Connects directly to inductor; discharged via 100Ω resistor during shutdown |
| FB (8) | Feedback input | Senses output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3) |
| COMP (9) | Error amplifier output | Internal compensation requires connection to VDD; external networks enable custom loop tuning |
| EN (5) | Enable control | Active-high logic; pulls output low and discharges VOUT via internal soft-stop switch when disabled |
| PG (3) | Open-drain power-good | Signals regulation status with 1ms delay; requires external 10kΩ–100kΩ pull-up to VIN |
| FS (6) | Frequency select | Resistor-to-SGND sets 500kHz–4MHz; tied to VIN for default 2MHz operation |
| SYNC (4) | Mode/synchronization | High = PWM, low = PFM, external clock = sync up to 4MHz |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 36mΩ high-side P-FET + 13mΩ low-side N-FET - eliminates external switches and reduces BOM count |
| 100% Duty-Cycle Operation | Enables <180mV dropout at 5A - critical for low-VIN applications like battery brownout recovery |
| Adjustable Soft-Start | 1ms fixed or capacitor-programmable - prevents overshoot and controls inrush into 1000+ µF output banks |
| Discontinuous/Forced CCM Mode | Selectable via SYNC pin - balances EMI reduction (CCM) vs. light-load efficiency (DCM) |
| Comprehensive Protection | Hiccup OCP, OV/UV on PG, thermal shutdown, negative current limit - no external fault monitoring needed |
Applications
| DC/DC POL Modules | µC/µP and FPGA Core Power |
|---|---|
Use Scenario: Compact, high-density board space where multi-rail power delivery must fit within strict height constraints (≤1mm). IC Role / Device Role / Timing Role: Primary step-down regulator supplying configurable core voltage (0.6V–3.6V) to SoCs with dynamic DVFS requirements. Use Value: 2MHz switching allows use of sub-1µH inductors and minimal ceramic capacitance, reducing total solution area to <0.22 in². | Use Scenario: Powering ARM Cortex-A series processors or Xilinx Artix-7 FPGAs requiring tightly regulated 1.0V–1.2V at up to 5A peak. IC Role / Device Role / Timing Role: Main core rail converter with precise 0.8% reference accuracy and 1ms PG delay for deterministic boot sequencing. Use Value: Internal 36mΩ/13mΩ FETs deliver >93% efficiency at 1.2V/5A, minimizing thermal load on densely packed CPU packages. |
| Portable Instruments | Li-ion Battery-Powered Devices |
Use Scenario: Handheld test equipment (e.g., portable oscilloscopes) needing ultra-low quiescent current and robust start-up under weak battery conditions. IC Role / Device Role / Timing Role: Main system rail regulator supporting wide VIN range (2.7V–5.5V) and seamless transition from USB to battery power. Use Value: 50µA quiescent current in PFM mode extends runtime; 100% duty-cycle operation maintains regulation down to 2.87V battery voltage. | Use Scenario: Wearables and medical sensors powered by single-cell Li-ion batteries with aggressive discharge profiles. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 1.8V I/O or 3.3V peripheral rails while maintaining >90% efficiency at 100mA–5A load range. Use Value: Discontinuous mode at light load cuts switching losses; soft-stop discharge prevents reverse current flow during battery swap or deep sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8025IRTAJZ-T | 1MHz default frequency, identical pinout and package - lower switching frequency increases inductor size but reduces EMI | Better suited for noise-sensitive analog subsystems where 1MHz harmonics fall outside critical bands | Select when board layout cannot accommodate 2MHz EMI filtering or when using larger inductors improves thermal margin |
| TPS54560BQPWPRQ1 | 4.5V–60V input, 5A, adjustable frequency (100kHz–2.5MHz), no integrated low-side FET - requires external MOSFET | Designed for automotive 12V/24V systems; lacks integrated N-FET and soft-stop discharge function | Choose only for high-input-voltage industrial applications; not drop-in due to different topology and pin assignment |
Compared with ISL8025IRTAJZ-T, the ISL8025AIRTAJZ-T delivers higher switching frequency for smaller passives but slightly higher no-load current; versus TPS54560BQPWPRQ1, it offers full integration and battery-optimized features but lacks automotive qualification and wide-VIN capability.
Availability
ISL8025AIRTAJZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/µP and FPGA core power, and portable instrumentation requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ISL8025AIRTAJZ-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 is a global semiconductor leader specializing in microcontrollers, analog power management, and timing solutions for industrial, automotive, and computing markets.
The ISL8025A belongs to Renesas' high-efficiency monolithic buck regulator product line, designed specifically for space-constrained, battery-powered, and FPGA/microprocessor point-of-load applications demanding high current density and thermal resilience.
FAQ
What is the default switching frequency of the ISL8025AIRTAJZ-T?
The ISL8025AIRTAJZ-T has a factory-configured default switching frequency of 2MHz when the FS pin is connected to VIN. This setting enables use of smaller inductors (e.g., 0.33µH–0.68µH) and reduces output voltage ripple without requiring additional filtering components. Frequency can be adjusted between 500kHz and 4MHz using an external resistor from FS to SGND.
Does the ISL8025AIRTAJZ-T support power-good signaling with timing control?
Yes, the ISL8025AIRTAJZ-T provides an open-drain power-good (PG) output with a fixed 1ms delay after output voltage reaches regulation. The PG pin requires an external pull-up resistor (10kΩ–100kΩ to VIN) and asserts high when VOUT is within ±5% of target. It also integrates overvoltage (0.80V threshold) and undervoltage (0.51V rising threshold) monitoring on the FB node.
How does the ISL8025AIRTAJZ-T handle shutdown and output discharge?
When the EN pin is driven low, the ISL8025AIRTAJZ-T enters shutdown mode and actively discharges the output capacitor through an internal soft-stop switch. This prevents residual voltage from interfering with system reset sequencing or causing back-powering of upstream circuitry. The discharge path is independent of external components and operates reliably across the full temperature range.
Can the ISL8025AIRTAJZ-T operate with 100% duty cycle, and what is its practical benefit?
Yes, the ISL8025AIRTAJZ-T supports true 100% duty-cycle operation, achieving less than 180mV dropout voltage at 5A output current. This capability allows the device to maintain regulation even when input voltage sags close to the output level - essential for Li-ion battery applications during discharge or cold-cranking scenarios in portable equipment.
What protection features are integrated into the ISL8025AIRTAJZ-T?
The ISL8025AIRTAJZ-T integrates hiccup-mode overcurrent protection (6A–9A trip range), overtemperature shutdown (150°C with 25°C hysteresis), input UVLO (2.7V rising), output overvoltage/undervoltage detection via PG, and negative current limiting (−1.5A to −4.5A). All protections activate without external components and recover automatically after fault removal.
ISL8025AIRTAJZ-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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8025AIRTAJZ-T FAQ
1.How can I place an order for ISL8025AIRTAJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8025AIRTAJZ-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 ISL8025AIRTAJZ-T reliable?
The price and inventory of ISL8025AIRTAJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8025AIRTAJZ-T is usually 5 days.
3.What payment methods are accepted for ISL8025AIRTAJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8025AIRTAJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8025AIRTAJZ-T?
ISL8025AIRTAJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8025AIRTAJZ-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 ISL8025AIRTAJZ-T?
For technical support, including ISL8025AIRTAJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8025AIRTAJZ-T requirements.
6.How does Aetrix verify that ISL8025AIRTAJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8025AIRTAJZ-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 ISL8025AIRTAJZ-T meets industry standards.
7.What is the process for return or replacement of ISL8025AIRTAJZ-T?
All ISL8025AIRTAJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8025AIRTAJZ-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 ISL8025AIRTAJZ-T part is unused and in its original packaging.
Return procedure for ISL8025AIRTAJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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