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Renesas ISL8025IRTAZT7AR5194
- Part No.:
- ISL8025IRTAZT7AR5194
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8025IRTAZT7AR5194.pdf
- Description:
- IC REG BUCK ADJ 5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,600
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Product details
Overview
ISL8025IRTAZT7AR5194 from Renesas Electronics is a monolithic synchronous buck regulator delivering 5A continuous output current from a 2.7V–5.5V input, featuring 36mΩ P-channel and 13mΩ N-channel integrated MOSFETs, 1MHz default switching frequency, and 0.6V reference voltage with 0.8% accuracy over temperature/load/line. It serves as a high-efficiency point-of-load (POL) power supply for microcontrollers and FPGAs in space-constrained industrial and portable systems.
For engineers reviewing the ISL8025IRTAZT7AR5194 datasheet, ISL8025IRTAZT7AR5194 pinout, ISL8025IRTAZT7AR5194 application, or ISL8025IRTAZT7AR5194 equivalent, key selection considerations include its 16-pin 3×3mm QFN package with exposed thermal pad, adjustable 500kHz–4MHz switching frequency, forced-continuous/discontinuous light-load operation modes, internal soft-start (1ms), and integrated hiccup-mode overcurrent, overvoltage, and overtemperature protection.
Technical Context
The ISL8025IRTAZT7AR5194 employs current-mode control architecture enabling fast transient response and stable loop behavior at high frequencies. Its integrated high-side P-MOSFET (36mΩ typical) and low-side N-MOSFET (13mΩ typical) support up to 95% peak efficiency and 100% duty-cycle operation for <180mV dropout at 5A.
It supports dual operating modes via the SYNC pin: PWM for low-noise regulation or PFM for light-load efficiency optimization. Frequency is set by an external resistor on the FS pin (500kHz–4MHz range), with default 1MHz when FS = VIN - distinguishing it from the ISL8025A variant (2MHz default).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5A continuous - supports high-current digital loads like FPGA core rails without external pass devices. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and 3.3V system rails. |
| Default Switching Frequency | 1MHz - enables compact magnetics (e.g., 1µH inductor) and reduces EMI compared to sub-500kHz designs. |
| Reference Voltage Accuracy | ±0.8% over temperature, line, and load - ensures tight output regulation for sensitive logic supplies. |
| Power-Good Delay | 1ms after output reaches regulation - provides deterministic sequencing for downstream processors. |
| Thermal Shutdown Threshold | 150°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Quiescent Current (PWM mode) | 8–15mA at 1MHz - balances light-load efficiency and dynamic response in always-on systems. |
Pinout & Package
ISL8025IRTAZT7AR5194 is housed in a RoHS-compliant 16-lead 3mm × 3mm TQFN package with exposed thermal pad (PKG DWG L16.3x3D), optimized for low θJA (47°C/W) and minimal board area (<0.22 in²).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires ≥2×22µF ceramic decoupling close to pins for stability and EMI suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt; internal 100Ω discharge path during shutdown. |
| FB (Pin 8) | Feedback input | Senses output voltage via 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; must tie to VDD in standard config; external network optional for loop tuning. |
| EN (Pin 5) | Enable control | Active-high logic input; pulls output capacitor to ground via internal soft-stop switch when disabled. |
| PG (Pin 3) | Open-drain power-good | Asserts after 1ms delay when VOUT is within ±5% of target; requires external pull-up to VIN. |
| FS (Pin 6) | Frequency select | Resistor-to-ground sets fSW from 500kHz to 4MHz; default 1MHz when tied to VIN. |
| SYNC (Pin 4) | Mode/synchronization | High = PWM mode; low = PFM mode; external clock input up to 4MHz for system-level timing alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 36mΩ P-ch HS + 13mΩ N-ch LS enable >95% efficiency at 5A and reduce BOM count by eliminating external switches. |
| 100% Duty-Cycle Operation | Supports <180mV dropout at 5A - critical for low-VIN/high-VOUT scenarios like 3.3V-to-3.0V POL conversion. |
| Adjustable Soft-Start | 1ms fixed or capacitor-adjustable (up to 33nF) - prevents inrush current and controls startup slew rate. |
| Multi-Mode Light-Load Control | Configurable PWM (low noise) or PFM (high efficiency) via SYNC pin - adapts to dynamic load profiles. |
| Comprehensive Fault Protection | Hiccup-mode OCP, ±200mA zero-cross detection, -1.5A to -4.5A negative current limit, OV/UV, and thermal shutdown. |
Applications
| Microcontroller Core Supply | FPGA I/O Bank Power |
|---|---|
|
Use Scenario: Providing clean, regulated 1.2V/1.8V core voltage to ARM Cortex-M7 or RISC-V SoCs in edge AI sensors. IC Role / Device Role / Timing Role: Primary DC/DC POL regulator with fast transient response to handle CPU burst currents up to 5A. Use Value: Integrated 36mΩ/13mΩ FETs and current-mode control deliver <2% output deviation during 0→5A load steps. |
Use Scenario: Powering 3.3V or 2.5V I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs in industrial PLC modules. IC Role / Device Role / Timing Role: High-current, low-noise buck converter supporting hot-swap and partial reconfiguration sequences. Use Value: 1ms PG delay and ±0.8% VREF accuracy ensure reliable FPGA configuration and I/O initialization timing. |
| Portable Test Instrumentation | Li-ion Powered Medical Monitor |
|
Use Scenario: Generating 5V/3.3V rails for ADC front-ends and wireless transceivers in handheld oscilloscopes. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down regulator enabling battery life extension via PFM mode at standby. Use Value: 500kHz–4MHz frequency adjust allows EMI optimization around sensitive analog signal bands. |
Use Scenario: Regulating 1.8V/3.3V for MCU, display, and sensor interface in wearable ECG monitors powered by 3.7V Li-ion cells. IC Role / Device Role / Timing Role: Safety-aware POL supply with hiccup-mode OCP and thermal shutdown meeting IEC 60601-1 leakage requirements. Use Value: 150°C thermal shutdown with 25°C hysteresis prevents thermal runaway during prolonged clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8023IRTAJZ-T7A | 3A rated, same 3×3mm QFN package, pin-to-pin compatible per datasheet; lower current capability and higher RDS(on). | Targeted at lower-power µC or DSP rails where 3A suffices; not suitable for 5A FPGA core loads. | Select when board layout reuse is critical and load current remains ≤3A; verify thermal margin with reduced copper area. |
| TPS54560BQPWPRQ1 | Automotive-grade 5A buck (AEC-Q100), 3.5–60V input, external MOSFETs, 100V abs max; no integrated FETs, larger solution size. | Designed for harsh environments (e.g., automotive infotainment); lacks integrated FETs and 100% duty-cycle capability. | Choose for extended input range or AEC-Q100 compliance; accept added complexity and footprint for reliability in demanding settings. |
Compared with ISL8025IRTAZT7AR5194, the ISL8023 offers layout compatibility at reduced current capacity, while the TPS54560BQPWPRQ1 trades integration for wide-input ruggedness - making ISL8025IRTAZT7AR5194 optimal for compact, high-efficiency 5A POLs in commercial/industrial space-constrained designs.
Availability
ISL8025IRTAZT7AR5194 is available at Aetrix Electronics and suitable for point-of-load power delivery, FPGA/microcontroller core supplies, and portable instrumentation requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ISL8025IRTAZT7AR5194 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, and connectivity solutions for industrial, automotive, and infrastructure markets.
The ISL8025IRTAZT7AR5194 belongs to Renesas' ISL80xx family of compact monolithic buck regulators, engineered for high-efficiency, low-noise, and space-constrained point-of-load applications in battery-powered and embedded systems.
FAQ
What is the default switching frequency of the ISL8025IRTAZT7AR5194?
The ISL8025IRTAZT7AR5194 has a default switching frequency of 1MHz when the FS pin is connected to VIN. This value is confirmed in the datasheet's Ordering Information table and Electrical Specifications section. The frequency is programmable from 500kHz to 4MHz using an external resistor on the FS pin, but the ISL8025IRTAZT7AR5194 variant is specified with the 1MHz default - distinct from the ISL8025A's 2MHz default.
Does the ISL8025IRTAZT7AR5194 support 100% duty-cycle operation?
Yes, the ISL8025IRTAZT7AR5194 supports 100% duty-cycle operation, enabling ultra-low dropout performance. At 5A output current, this results in less than 180mV dropout voltage - a key feature for applications where input voltage approaches the desired output, such as 3.3V-to-3.0V conversion. This capability is explicitly stated in the datasheet's main product description and verified in the PHASE section of Electrical Specifications.
How does the ISL8025IRTAZT7AR5194 manage light-load efficiency?
The ISL8025IRTAZT7AR5194 offers selectable light-load operation via the SYNC pin: connecting SYNC to GND enables PFM mode for highest efficiency at light loads, while tying SYNC to VIN selects PWM mode for lowest noise and consistent frequency. This dual-mode flexibility is documented in the Pin Descriptions and Theory of Operation sections, allowing designers to optimize for either battery life or EMI-sensitive signal chains.
What protection features are integrated into the ISL8025IRTAZT7AR5194?
The ISL8025IRTAZT7AR5194 integrates hiccup-mode overcurrent protection, overvoltage and undervoltage protection (monitored via FB), thermal shutdown at 150°C with 25°C hysteresis, and negative current limiting down to –4.5A. These protections are fully detailed in the datasheet's "Fault Protection" overview and Electrical Specifications tables, ensuring robust operation under fault conditions without external circuitry.
Can the ISL8025IRTAZT7AR5194 be used with internal compensation only?
Yes, the ISL8025IRTAZT7AR5194 supports internal compensation by connecting the COMP pin to VDD - a configuration validated in the Typical Application Circuit (Figure 1) and Pin Descriptions. In this mode, the error amplifier transconductance is 60µA/V, and no external compensation network is required, simplifying design for standard applications. External compensation remains optional for advanced loop tuning.
ISL8025IRTAZT7AR5194 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Bulk
- 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:
- 500kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8025IRTAZT7AR5194 FAQ
1.How can I place an order for ISL8025IRTAZT7AR5194 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8025IRTAZT7AR5194 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 ISL8025IRTAZT7AR5194 reliable?
The price and inventory of ISL8025IRTAZT7AR5194 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8025IRTAZT7AR5194 is usually 5 days.
3.What payment methods are accepted for ISL8025IRTAZT7AR5194?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8025IRTAZT7AR5194 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8025IRTAZT7AR5194?
ISL8025IRTAZT7AR5194 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8025IRTAZT7AR5194 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 ISL8025IRTAZT7AR5194?
For technical support, including ISL8025IRTAZT7AR5194 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8025IRTAZT7AR5194 requirements.
6.How does Aetrix verify that ISL8025IRTAZT7AR5194 is sourced from the original manufacturer or authorized distributors?
All ISL8025IRTAZT7AR5194 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 ISL8025IRTAZT7AR5194 meets industry standards.
7.What is the process for return or replacement of ISL8025IRTAZT7AR5194?
All ISL8025IRTAZT7AR5194 units undergo pre-shipment inspection (PSI). If there is an issue with ISL8025IRTAZT7AR5194, 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 ISL8025IRTAZT7AR5194 part is unused and in its original packaging.
Return procedure for ISL8025IRTAZT7AR5194:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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