My Inquiry
My Account
Renesas ISL8025IRTAJZ
- Part No.:
- ISL8025IRTAJZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8025IRTAJZ.pdf
- Description:
- IC REG BUCK ADJ 5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:710
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL8025IRTAJZ 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 in space-constrained industrial embedded systems.
For engineers reviewing the ISL8025IRTAJZ datasheet, ISL8025IRTAJZ pinout, ISL8025IRTAJZ application, or ISL8025IRTAJZ equivalent, key selection criteria include its 100% duty-cycle capability (<180mV dropout at 5A), internal/external soft-start (1ms fixed or adjustable), hiccup-mode overcurrent protection, and thermal shutdown at 150°C - all critical for reliable low-voltage, high-current POL designs.
Technical Context
The ISL8025IRTAJZ employs current-mode control architecture with slope compensation to ensure fast transient response and loop stability across wide load and input ranges. Its integrated power stage uses a P-channel high-side FET (36mΩ typical @ 5V) and N-channel low-side FET (13mΩ typical @ 5V), enabling high efficiency up to 95% and minimizing external component count.
Switching frequency is programmable from 500kHz to 4MHz via the FS pin resistor; the ISL8025IRTAJZ defaults to 1MHz when FS is tied to VIN. It supports both forced continuous conduction mode (reducing EMI) and discontinuous mode (improving light-load efficiency), with SYNC pin enabling external clock synchronization up to 4MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5A continuous - supports high-current FPGA, µP, and DSP core supplies without external boost stages. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and 3.3V intermediate bus rails. |
| Reference Voltage | 0.600V ±0.005V - enables precise output regulation down to 0.6V with 0.8% total error over temp/load/line. |
| Switching Frequency | 1MHz default (FS = VIN); adjustable 500kHz–4MHz - balances size (smaller inductors/caps) vs. efficiency vs. EMI. |
| Efficiency | Up to 95% - achieved via ultra-low RDS(on) FETs (36mΩ HS / 13mΩ LS) and optimized gate drive. |
| Duty Cycle Range | 0–100% - supports <180mV dropout at 5A, critical for low-VOUT applications near input rail. |
| Protection Features | Hiccup-mode OCP, thermal shutdown (150°C), overvoltage, undervoltage, and negative current limiting - ensures robust operation under fault conditions. |
Pinout & Package
ISL8025IRTAJZ is housed in a RoHS-compliant 16-lead 3mm × 3mm TQFN package with exposed thermal pad (PKG DWG L16.3x3D), 1mm max height, and optimized thermal resistance (θJA = 47°C/W, θJC = 6.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1, 16) | Input supply voltage | Primary power input; requires ≥2×22µF ceramic decoupling close to pins for stable high-frequency operation. |
| EN (5) | Enable control | Active-high logic input; pulls output to ground and discharges VOUT capacitor via internal soft-stop switch when low. |
| FS (6) | Frequency select | Resistor-to-ground sets switching frequency (500kHz–4MHz); tied to VIN for 1MHz default. |
| SS (7) | Soft-start timing | Connect to SGND for 1ms fixed ramp; add capacitor to SGND for adjustable soft-start (≤33nF). |
| FB (8) | Feedback sense | Negative input of error amplifier; sets VOUT via external resistor divider referenced to 0.6V. |
| COMP (9) | Compensation node | Error amplifier output; connect to VDD for internal compensation or configure external network for custom loop stability. |
| PG (3) | Power-good indicator | Open-drain output with 1ms delay after regulation; signals valid VOUT to downstream logic or sequencers. |
| PHASE (13–15) | Switching node | High-current connection to inductor; internally discharged via 100Ω resistor during shutdown to prevent shoot-through. |
| PGND (11, 12), SGND (10) | Ground returns | Separate power (PGND) and signal (SGND) grounds minimize noise coupling into feedback path. |
| Exposed Pad | Thermal & electrical ground | Must be soldered to SGND plane with multiple vias for optimal thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 36mΩ P-ch HS + 13mΩ N-ch LS FETs reduce conduction loss and eliminate external MOSFET layout complexity. |
| 100% Duty-Cycle Operation | Enables <180mV dropout at 5A, supporting ultra-low VOUT (e.g., 0.8V) from 2.7V input without headroom loss. |
| Programmable Switching Frequency | 500kHz–4MHz range allows optimization for size (higher fSW) or efficiency (lower fSW) per design constraints. |
| Internal Soft-Start & Soft-Stop | 1ms fixed soft-start prevents inrush; soft-stop actively discharges output capacitor during disable for safe sequencing. |
| Multi-Mode Control | PWM (low-noise) and PFM (high-efficiency light-load) modes selectable via SYNC pin - no external circuitry required. |
| Comprehensive Fault Protection | Hiccup OCP, thermal shutdown, OV/UV lockout, and negative current limiting enable autonomous recovery and system safety. |
Applications
| Application 1 | Application 2 |
|---|---|
|
Use Scenario: Core power supply for Xilinx Artix-7 FPGA in portable test equipment requiring 1.2V @ 4A with strict thermal limits. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.2V core voltage with fast transient response to logic switching events. Use Value: 95% peak efficiency and 100% duty cycle minimize heat generation and extend battery life while maintaining tight output regulation (±0.8%) across temperature. |
Use Scenario: Point-of-load converter on a 5G small cell baseband board powering ARM Cortex-A53 processor cores at 1.0V/3.5A. IC Role / Device Role / Timing Role: High-density POL regulator with 3×3mm footprint and 1MHz switching to meet EMI requirements in RF-sensitive environments. Use Value: Compact TQFN package and integrated FETs reduce PCB area by >40% vs. controller+discrete solution; SYNC pin enables spread-spectrum synchronization with system clock. |
| Application 3 | Application 4 |
|
Use Scenario: Secondary power rail in medical handheld ultrasound device supplying 1.8V to ADC and digital interface ICs from 3.3V intermediate bus. IC Role / Device Role / Timing Role: Efficient step-down regulator operating in PFM mode during standby to maximize battery runtime. Use Value: Discontinuous conduction mode reduces light-load quiescent current to 50µA, extending idle time without compromising wake-up speed. |
Use Scenario: Power module in industrial PLC I/O card requiring 3.3V @ 5A with robust fault handling in harsh environments. IC Role / Device Role / Timing Role: Fault-tolerant buck regulator with hiccup-mode OCP and thermal shutdown protecting against short-circuit and overtemperature events. Use Value: Integrated protection eliminates need for external current-sense amplifiers or discrete thermal sensors, reducing BOM cost and failure points. |
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 | 3A output rating, same 3×3mm TQFN package, identical pinout, but lower current capability and no 100% duty cycle support. | Suitable only for sub-3A loads; cannot replace ISL8025IRTAJZ in 5A applications without derating or parallel configuration. | Select ISL8023IRAJZ only when load current ≤3A and board space must match ISL8025IRTAJZ footprint. |
| MP2315DJ-LF-Z | 5A rated, 2.5–5.5V input, 500kHz–2.5MHz adjustable fSW, but higher RDS(on) (60mΩ HS / 30mΩ LS) and no internal soft-stop discharge. | Lacks active output capacitor discharge during shutdown, requiring external circuitry for safe power sequencing in multi-rail systems. | Choose MP2315DJ-LF-Z if cost sensitivity outweighs need for soft-stop and ultra-low RDS(on), but verify thermal margin at full load. |
Compared with ISL8025IRTAJZ, ISL8023IRAJZ offers pin-compatible downsizing for lighter loads, while MP2315DJ-LF-Z provides similar current rating at lower cost but sacrifices thermal performance, soft-stop functionality, and precision reference accuracy - making ISL8025IRTAJZ optimal for high-reliability, high-efficiency 5A POL designs.
Availability
ISL8025IRTAJZ is available at Aetrix Electronics and suitable for FPGA core power, industrial PLC I/O modules, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8025IRTAJZ 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 automotive, industrial, and IoT applications.
The ISL8025IRTAJZ belongs to Renesas' ISL80xx family of compact synchronous buck regulators, designed specifically for high-efficiency, space-constrained point-of-load power delivery in battery-powered and thermally sensitive systems.
FAQ
What is the default switching frequency of the ISL8025IRTAJZ, and how is it configured?
The ISL8025IRTAJZ defaults to 1MHz switching frequency when the FS pin is connected to VIN. This is confirmed in the Ordering Information table and Electrical Specifications section of the FN8357 datasheet. Frequency can be adjusted between 500kHz and 4MHz using an external resistor from FS to SGND - for example, 402kΩ yields ~490kHz, while 42.2kΩ achieves ~4.2MHz. The ISL8025IRTAJZ is distinct from the ISL8025A variant, which defaults to 2MHz.
Does the ISL8025IRTAJZ support 100% duty-cycle operation, and what is its practical benefit?
Yes, the ISL8025IRTAJZ supports true 100% duty-cycle operation, enabling less than 180mV dropout voltage at 5A output current. This capability allows the regulator to maintain regulation even when input voltage approaches the output voltage - critical for low-VOUT applications like 0.8V FPGA cores powered from a 2.7V minimum input. It eliminates the need for higher-input intermediate rails and improves system-level power efficiency.
How does the ISL8025IRTAJZ handle output capacitor discharge during shutdown?
The ISL8025IRTAJZ implements internal soft-stop functionality: when the EN pin is driven low, an internal switch actively discharges the output capacitor through a controlled path. This ensures rapid, safe discharge of VOUT without relying on external bleed resistors - essential for proper power sequencing in multi-rail systems and preventing back-powering of upstream components. The feature is explicitly documented in the datasheet's "Discharge Mode (Soft-Stop)" section.
What are the key differences between ISL8025IRTAJZ and ISL8025AIRTAJZ?
The ISL8025IRTAJZ and ISL8025AIRTAJZ share identical pinout, package, and functional architecture, but differ in default switching frequency (1MHz vs. 2MHz) and corresponding MOSFET RDS(on) optimization. The ISL8025AIRTAJZ is tuned for higher-frequency operation with slightly different FET sizing, resulting in lower losses at 2MHz but reduced efficiency at 1MHz. Datasheet Table 1 confirms the ISL8025IRTAJZ is rated for 0.5–4MHz, while ISL8025AIRTAJZ is specified for 1–4MHz.
Can the ISL8025IRTAJZ be synchronized to an external clock, and what are the timing requirements?
Yes, the ISL8025IRTAJZ supports external synchronization via the SYNC pin, accepting positive-edge-triggered clock signals up to 4MHz. The SYNC pin has a logic low threshold of 0.70–0.80V and hysteresis of 0.15V, ensuring noise immunity. When used for synchronization, the internal oscillator is disabled, and the device locks to the external clock - enabling EMI reduction through frequency alignment in dense multi-converter systems. This capability is verified in the "Frequency Adjust" and "SYNC" sections of the FN8357 datasheet.
ISL8025IRTAJZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- 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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8025IRTAJZ FAQ
1.How can I place an order for ISL8025IRTAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8025IRTAJZ 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 reliable?
The price and inventory of ISL8025IRTAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8025IRTAJZ is usually 5 days.
3.What payment methods are accepted for ISL8025IRTAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8025IRTAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8025IRTAJZ?
ISL8025IRTAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8025IRTAJZ 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?
For technical support, including ISL8025IRTAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8025IRTAJZ requirements.
6.How does Aetrix verify that ISL8025IRTAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8025IRTAJZ 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 meets industry standards.
7.What is the process for return or replacement of ISL8025IRTAJZ?
All ISL8025IRTAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8025IRTAJZ, 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 part is unused and in its original packaging.
Return procedure for ISL8025IRTAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL8025IRTAJZ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
