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Renesas ISL8025AIRTAJZ-T7A
- Part No.:
- ISL8025AIRTAJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8025AIRTAJZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,189
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Product details
Overview
ISL8025AIRTAJZ-T7A from Renesas Electronics is a monolithic synchronous buck DC/DC regulator delivering 5A continuous output current from a 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 full load - deployed in FPGA core power supplies and portable Li-ion battery systems.
For engineers reviewing the ISL8025AIRTAJZ-T7A datasheet, ISL8025AIRTAJZ-T7A pinout, ISL8025AIRTAJZ-T7A application, or ISL8025AIRTAJZ-T7A 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-T7A employs current-mode control architecture for fast transient response and stable loop behavior across 500kHz–4MHz programmable switching frequencies. Its dual-MOSFET power stage integrates low-RDS(on) switches optimized for high efficiency up to 95% at 5A, with 100% duty-cycle capability enabling ultra-low dropout operation.
It supports both forced continuous conduction mode (CCM) and discontinuous conduction mode (DCM) via SYNC pin configuration, enabling noise-sensitive or efficiency-critical system trade-offs. Protection features include overvoltage, overtemperature (150°C), negative overcurrent (−3A), and hiccup-mode short-circuit limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (3.0–4.2V), USB PD, and 3.3V/5V rail inputs without pre-regulation. |
| Output Current | 5A continuous - sufficient for powering mid-range FPGAs, microcontrollers, and DSP cores with margin. |
| Default Switching Frequency | 2MHz - enables compact external components (e.g., ≤1µH inductors, 22µF ceramic caps) and reduces EMI fundamental frequency. |
| Reference Voltage Accuracy | ±0.8% over temperature/load/line - ensures tight output regulation (e.g., ±14.4mV on 1.8V output) without post-regulation trimming. |
| Power-Good Delay | 1ms - provides deterministic system reset timing after output reaches regulation, compatible with processor POR requirements. |
| Thermal Shutdown Threshold | 150°C with 25°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Quiescent Current (PWM mode) | 16–23mA at 2MHz - balances light-load efficiency against dynamic response needs in active systems. |
Pinout & Package
ISL8025AIRTAJZ-T7A is housed in a RoHS-compliant 16-lead 3mm × 3mm TQFN package with exposed thermal pad, offering low thermal resistance (θJA = 47°C/W, θJC = 6.5°C/W) and 1mm maximum height for space-constrained POL applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires ≥2×22µF local ceramic decoupling to PGND for stability and ripple suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt; internal 100Ω discharge path when disabled to prevent floating node. |
| PGND (Pins 11, 12) | Power ground return | Separate low-impedance path for high-current switch return; must be connected to VIN capacitor ground and exposed pad. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, FS; isolated from PGND to minimize noise coupling into feedback loop. |
| FB (Pin 8) | Feedback input | Monitors output via resistor divider; senses 0.6V reference to regulate VOUT = 0.6V × (1 + R2/R3); used by PG and UVLO circuits. |
| COMP (Pin 9) | Error amplifier output | Internal compensation node; connect to VDD for standard config; external RC network optional for custom loop shaping. |
| EN (Pin 5) | Enable control | Active-high logic input; pulls output capacitor to ground via internal soft-stop switch when low, preventing reverse current. |
| FS (Pin 6) | Frequency select | Resistor-to-ground sets 500kHz–4MHz; tied to VIN for default 2MHz; enables synchronization to external clock up to 4MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 36mΩ P-FET + 13mΩ N-FET enables >95% peak efficiency at 5A and eliminates external MOSFET layout complexity. |
| 100% Duty-Cycle Operation | Supports <180mV dropout at 5A, allowing regulation down to VIN − 0.18V - critical for Li-ion end-of-discharge operation. |
| Programmable Soft-Start | 1ms internal ramp (SS = SGND) or adjustable via capacitor (≤33nF); prevents inrush current and stabilizes startup sequencing. |
| Power-Good Output | Open-drain PG with 1ms delay and ±30mV hysteresis confirms VOUT within ±1.5% of target before releasing system reset. |
| Hiccup-Mode OCP | Auto-restart current limiting during short circuit protects MOSFETs and PCB traces without thermal runaway or latch-up. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in compact server mezzanine cards requiring high-density 1.2V/1.8V rails. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core voltage with fast load-step response. Use Value: 2MHz operation minimizes inductor size to ≤1µH and capacitor count to two 22µF ceramics per rail, reducing board area by >30% vs. 500kHz solutions. |
Use Scenario: Core power supply for Xilinx Artix-7 FPGA with 1.0A–4.5A dynamic current demand. IC Role / Device Role / Timing Role: Main VCCINT regulator with precise 0.6V reference and ±0.8% accuracy ensuring logic-level compliance. Use Value: 100% duty cycle maintains regulation down to 2.85V input, extending runtime on single-cell Li-ion batteries beyond 3.0V cutoff. |
| Portable Instruments | Li-ion Battery Powered Devices |
Use Scenario: Handheld oscilloscope with dual 3.3V/1.2V rails powered from 3.7V nominal Li-ion pack. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating in forced CCM to suppress RF interference near analog front-end. Use Value: SYNC pin configured for PWM mode eliminates audible switching noise and ensures consistent EMI profile across battery voltage range. |
Use Scenario: Wireless sensor node with intermittent 5A burst transmission powered by 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Main system regulator supporting 100% duty cycle during deep discharge (3.0V–3.3V) while maintaining 1.8V output. Use Value: Soft-stop discharge during shutdown prevents reverse current flow into depleted battery, preserving charge and protecting cell health. |
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-T7A | 1MHz default frequency, identical pinout and package; higher minimum on-time (140ns vs. same), lower max FSW (4MHz vs. same). | Preferred where lower switching frequency reduces EMI sensitivity or allows larger, lower-cost inductors. | Select ISL8025IRTAJZ-T7A if system layout lacks filtering for 2MHz harmonics or thermal budget permits larger magnetics. |
| TPS54560BQPWPRQ1 | Adjustable 100kHz–2.5MHz frequency, 60V max input, external MOSFETs, no integrated high-side FET; wider VIN but lower integration. | Suitable for automotive 12V/24V input systems requiring AEC-Q100 qualification and higher input tolerance. | Choose TPS54560BQPWPRQ1 only when input exceeds 5.5V or AEC-Q100 compliance is mandatory; not drop-in compatible. |
Compared with ISL8025IRTAJZ-T7A, the ISL8025AIRTAJZ-T7A delivers faster transient response and smaller passive components due to its 2MHz default frequency, while the TPS54560BQPWPRQ1 trades integration for input voltage range and automotive qualification - neither offers pin-to-pin replacement without schematic or layout revision.
Availability
ISL8025AIRTAJZ-T7A is available at Aetrix Electronics and suitable for DC/DC POL modules, μC/FPGA power delivery, and Li-ion battery-powered devices requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for ISL8025AIRTAJZ-T7A 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-operated, and high-performance digital load applications demanding low dropout, fast transient response, and robust fault protection.
FAQ
What is the default switching frequency of the ISL8025AIRTAJZ-T7A?
The ISL8025AIRTAJZ-T7A has a factory-default switching frequency of 2MHz when the FS pin is connected to VIN. This setting enables compact external component selection - such as 0.33–0.68µH inductors and 22µF ceramic capacitors - while maintaining high efficiency (>90% at 3A) and low output ripple. Frequency can be adjusted between 500kHz and 4MHz using an external resistor on the FS pin.
Does the ISL8025AIRTAJZ-T7A support 100% duty-cycle operation?
Yes, the ISL8025AIRTAJZ-T7A supports true 100% duty-cycle operation, enabling output regulation even when input voltage drops close to the desired output level. At 5A load, this results in less than 180mV dropout voltage - critical for maintaining stable core voltage during Li-ion battery discharge from 4.2V down to 3.0V while powering a 1.8V rail.
How does the soft-start function work on the ISL8025AIRTAJZ-T7A?
The ISL8025AIRTAJZ-T7A implements a programmable soft-start via the SS pin: tying SS to SGND yields a fixed 1ms ramp time, while connecting a capacitor (≤33nF) between SS and SGND linearly extends ramp duration. This controls inductor current slew rate during startup, preventing input voltage droop and overshoot on downstream rails - essential for reliable power sequencing in multi-rail systems.
What protection features are integrated into the ISL8025AIRTAJZ-T7A?
The ISL8025AIRTAJZ-T7A integrates hiccup-mode overcurrent protection, thermal shutdown (150°C trip with 25°C hysteresis), output overvoltage protection (OVP), input undervoltage lockout (UVLO), and negative overcurrent detection (−3A limit). These functions operate autonomously without external components, safeguarding both the IC and connected loads during fault conditions like short circuits or thermal overload.
Can the ISL8025AIRTAJZ-T7A be synchronized to an external clock?
Yes, the ISL8025AIRTAJZ-T7A supports external synchronization via the SYNC pin, accepting positive-edge-triggered clock signals up to 4MHz. When synchronized, the device aligns its PWM edges to the external source - reducing beat frequencies and simplifying EMI filter design in multi-converter systems - while retaining all internal protections and regulation accuracy.
ISL8025AIRTAJZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-T7A FAQ
1.How can I place an order for ISL8025AIRTAJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8025AIRTAJZ-T7A 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-T7A reliable?
The price and inventory of ISL8025AIRTAJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8025AIRTAJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8025AIRTAJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8025AIRTAJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8025AIRTAJZ-T7A?
ISL8025AIRTAJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8025AIRTAJZ-T7A 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-T7A?
For technical support, including ISL8025AIRTAJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8025AIRTAJZ-T7A requirements.
6.How does Aetrix verify that ISL8025AIRTAJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8025AIRTAJZ-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL8025AIRTAJZ-T7A?
All ISL8025AIRTAJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8025AIRTAJZ-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL8025AIRTAJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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