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Renesas ISL8025IRTAJZ-T7A
- Part No.:
- ISL8025IRTAJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8025IRTAJZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,542
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Product details
Overview
ISL8025IRTAJZ-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 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 enables compact point-of-load power for FPGA core rails.
For engineers reviewing the ISL8025IRTAJZ-T7A datasheet, ISL8025IRTAJZ-T7A pinout, ISL8025IRTAJZ-T7A application, or ISL8025IRTAJZ-T7A equivalent, key selection criteria include its 100% duty-cycle capability (<180mV dropout at 5A), internal/external compensation flexibility, soft-stop output discharge, and hiccup-mode overcurrent protection in a space-constrained 3×3mm QFN package.
Technical Context
The ISL8025IRTAJZ-T7A employs current-mode control architecture to ensure fast transient response and stable loop behavior across wide load and input ranges. Its integrated high-side P-FET and low-side N-FET enable high-efficiency operation up to 95%, while the adjustable 500kHz–4MHz PWM frequency supports EMI optimization and inductor size reduction.
It supports dual operating modes-forced continuous conduction (reduced noise/RFI) and discontinuous conduction (higher light-load efficiency)-and integrates comprehensive fault protection including overtemperature shutdown (150°C trip), overvoltage/undervoltage monitoring via PG, and negative current limiting (−3A typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and intermediate bus rails without pre-regulation. |
| Output Current | 5A continuous - sufficient for powering modern FPGA I/O banks or microcontroller cores. |
| Switching Frequency | Default 1MHz (FS tied to VIN); programmable 500kHz–4MHz - enables trade-off between efficiency and component size. |
| Reference Voltage | 0.600V ±0.005V - enables precise output regulation down to 0.6V with 0.8% total error over temp/load/line. |
| ON-Resistance (HS/Low-Side) | 36mΩ / 13mΩ typical - minimizes conduction loss and improves full-load efficiency to ≥95% at 3.3VIN/1.8VOUT. |
| Duty Cycle Range | 0–100% - allows ultra-low dropout operation (e.g., 180mV at 5A), critical for battery-powered systems near end-of-discharge. |
| Power-Good Delay | 1ms after VOUT regulation - provides deterministic system sequencing for downstream logic. |
Pinout & Package
ISL8025IRTAJZ-T7A is housed in a RoHS-compliant, thermally enhanced 16-lead 3×3mm TQFN package with exposed pad (PKG DWG L16.3x3D), optimized for PCB thermal dissipation via direct SGND connection and multiple vias under the pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input supply rail | Primary power input; requires local 2×22µF ceramic decoupling to PGND for stability and EMI suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt; must be routed short and wide to minimize ringing and losses. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switch return; separate from SGND to avoid noise coupling into feedback. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, FS; must be connected to exposed pad and isolated from PGND except at single-point tie. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); bias current <0.1µA minimizes divider error. |
| 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 disabled. |
| SS (Pin 7) | Soft-start timing | Controls ramp time: 1ms default (SS = SGND); capacitor to SGND extends startup to prevent inrush current overshoot. |
| FS (Pin 6) | Frequency select | Resistor-to-ground sets switching frequency; 0Ω (to VIN) = 1MHz default; 402kΩ = ~490kHz; 42.2kΩ = ~4.2MHz. |
| SYNC (Pin 4) | Mode/sync input | Selects PWM (high), PFM (low), or external sync (rising-edge triggered up to 4MHz); internal 1MΩ pull-down prevents float. |
| PG (Pin 3) | Power-good indicator | Open-drain output; requires external 10k–100kΩ pull-up to VIN; asserts after 1ms delay once VOUT is within regulation. |
| VDD (Pin 2) | Logic supply | Internally regulated rail powered from VIN; must be connected directly to VIN for proper gate drive and biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FETs | 36mΩ P-ch HS + 13mΩ N-ch LS MOSFETs reduce BOM count and improve efficiency vs discrete solutions. |
| 100% Duty Cycle | Enables <180mV dropout at 5A, supporting operation during battery sag or low-VIN conditions without regulation loss. |
| Soft-Stop Discharge | Internally discharges output capacitor on shutdown, preventing unintended back-powering of downstream circuitry. |
| Adjustable Soft-Start | Configurable 1ms–multi-ms ramp via SS pin capacitor, eliminating output overshoot and inrush stress on capacitors. |
| Hiccup-Mode OCP | Auto-retry current limiting during short-circuit events protects IC and PCB traces without latch-off or manual reset. |
| Thermal Shutdown | 150°C junction trip with 25°C hysteresis ensures safe operation under sustained overload or poor heatsinking. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC modules for telecom line cards requiring high-density, low-profile power conversion. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated 1.2V/1.8V/3.3V outputs from 3.3V or 5V intermediate bus. Use Value: 3×3mm footprint and <0.22 in² total solution area enable integration into space-constrained modules without sacrificing 5A capability. |
Use Scenario: Core and I/O power delivery for Xilinx Artix-7 FPGAs and ARM Cortex-A series microcontrollers. IC Role / Device Role / Timing Role: Point-of-load regulator supplying configurable VCCINT/VCCAUX rails with fast transient response to dynamic load steps. Use Value: Current-mode control and 1MHz switching deliver <1% output deviation during 0→5A 1µs load transients per Figure 40. |
| Portable Instruments | Li-ion Battery Powered Devices |
Use Scenario: Handheld test equipment (e.g., portable oscilloscopes, DMMs) requiring stable analog and digital rails from single-cell batteries. IC Role / Device Role / Timing Role: Main buck converter generating 1.8V and 3.3V from 3.0–4.2V Li-ion input, operating in PFM mode at standby. Use Value: Discontinuous conduction mode reduces no-load quiescent current to 50µA, extending battery life beyond 24 hours in sleep state. |
Use Scenario: Wearables and medical sensors powered by 3.7V Li-ion cells needing efficient step-down to 1.2V sensor bias and 3.3V MCU rails. IC Role / Device Role / Timing Role: Primary power regulator supporting full-load operation down to 2.7V input with 100% duty cycle during battery discharge. Use Value: <180mV dropout at 5A maintains regulation through entire battery discharge curve, avoiding brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8023IRAJZ-T7A | 3A output rating; identical 3×3mm QFN package and pinout; shares same control architecture and feature set. | Lower current capacity suits sub-3A loads like low-power MCUs or sensors; not suitable for 5A FPGA core rails. | Select when design load is ≤3A and footprint compatibility with ISL8025IRTAJZ-T7A is required for future scalability. |
| TPS54560BQPWPRQ1 | Automotive-grade (AEC-Q100); 60V max input; external MOSFETs; 5A typical output but requires external FETs and compensation. | Designed for harsh environments (−40°C to +125°C); supports wide-input industrial/battery systems but larger solution size. | Choose for automotive or high-input-voltage applications where extended temperature range and input robustness outweigh size constraints. |
Compared with ISL8025IRTAJZ-T7A, ISL8023IRAJZ-T7A offers pin-compatible downsizing for lower-current designs, while TPS54560BQPWPRQ1 trades integration for ruggedness and input voltage range-neither is drop-in, but both address adjacent design requirements where ISL8025IRTAJZ-T7A's 5A monolithic performance is unnecessary or insufficient.
Availability
ISL8025IRTAJZ-T7A is available at Aetrix Electronics and suitable for DC/DC POL modules, μC/FPGA power supplies, and Li-ion battery-powered devices requiring stable component supply, consistent parametric performance, and long-term production support.
Supply support for ISL8025IRTAJZ-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 embedded solutions for industrial, automotive, and communications markets.
The ISL8025 product line delivers highly integrated, high-efficiency synchronous buck regulators targeting space-constrained, battery-sensitive applications such as portable instrumentation and FPGA power delivery.
FAQ
What is the default switching frequency of the ISL8025IRTAJZ-T7A?
The ISL8025IRTAJZ-T7A has a default switching frequency of 1MHz, achieved when the FS pin is connected to VIN. This frequency balances efficiency, inductor size, and EMI performance for most point-of-load applications. The device supports adjustment from 500kHz to 4MHz using an external resistor from FS to SGND, enabling optimization for specific layout or noise requirements.
Does the ISL8025IRTAJZ-T7A support 100% duty-cycle operation?
Yes, the ISL8025IRTAJZ-T7A supports true 100% duty-cycle operation, allowing it to maintain regulation with minimal dropout voltage-less than 180mV at 5A output current. This capability is essential for maintaining stable output during low-input conditions, such as near-end-of-life in single-cell Li-ion battery systems, without requiring additional LDO post-regulation.
How does the ISL8025IRTAJZ-T7A handle output capacitor discharge during shutdown?
The ISL8025IRTAJZ-T7A implements soft-stop output discharge via an internal switch that actively pulls the PHASE node to PGND when EN is driven low. This safely discharges the output capacitor, preventing back-powering of downstream circuitry and ensuring clean, controlled power-down sequencing in multi-rail systems.
What is the reference voltage accuracy of the ISL8025IRTAJZ-T7A over temperature and load?
The ISL8025IRTAJZ-T7A features a 0.600V bandgap reference with ±0.005V (±0.8%) total accuracy over the full operating temperature range (−40°C to +85°C), line (2.7V–5.5V), and load (0–5A). This tight tolerance ensures reliable output voltage setting across real-world variations, critical for powering sensitive digital cores and analog subsystems.
Can the ISL8025IRTAJZ-T7A operate in both PWM and PFM modes?
Yes, the ISL8025IRTAJZ-T7A supports both PWM and PFM operation via the SYNC pin: logic high enables fixed-frequency PWM for low-noise, predictable EMI; logic low enables PFM for higher light-load efficiency. It also accepts external synchronization up to 4MHz, allowing system-level clock alignment for noise-sensitive applications like audio or RF subsystems.
ISL8025IRTAJZ-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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8025IRTAJZ-T7A FAQ
1.How can I place an order for ISL8025IRTAJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8025IRTAJZ-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 ISL8025IRTAJZ-T7A reliable?
The price and inventory of ISL8025IRTAJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8025IRTAJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8025IRTAJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8025IRTAJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8025IRTAJZ-T7A?
ISL8025IRTAJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8025IRTAJZ-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 ISL8025IRTAJZ-T7A?
For technical support, including ISL8025IRTAJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8025IRTAJZ-T7A requirements.
6.How does Aetrix verify that ISL8025IRTAJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8025IRTAJZ-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 ISL8025IRTAJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8025IRTAJZ-T7A?
All ISL8025IRTAJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8025IRTAJZ-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 ISL8025IRTAJZ-T7A part is unused and in its original packaging.
Return procedure for ISL8025IRTAJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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