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Renesas ISL8024IRTAJZ-T7A
- Part No.:
- ISL8024IRTAJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8024IRTAJZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 4A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:325
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Product details
Overview
ISL8024IRTAJZ-T7A from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 4A continuous output current from a 2.7V–5.5V input, featuring integrated 45mΩ P-Channel and 19mΩ N-Channel 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 FPGA, microcontroller, and DSP core rails.
For engineers reviewing the ISL8024IRTAJZ-T7A datasheet, ISL8024IRTAJZ-T7A pinout, ISL8024IRTAJZ-T7A application, or ISL8024IRTAJZ-T7A equivalent, key selection criteria include its 100% duty-cycle capability (<200mV dropout at 4A), hiccup-mode overcurrent protection, soft-stop output discharge, and support for both PWM and PFM operation via SYNC pin control.
Technical Context
The ISL8024IRTAJZ-T7A employs current-mode PWM control with slope compensation (440mV/Ts) and a transconductance error amplifier (80µA/V internal, 150µA/V with external FS resistor) for fast transient response and stable loop dynamics. Its dual-MOSFET architecture enables high efficiency-up to 95% at 3.3VOUT/4A-and supports pre-biased output startup.
It integrates comprehensive fault protection: overtemperature shutdown (150°C trip, 25°C hysteresis), overvoltage/undervoltage monitoring via PG pin, negative current limiting (−2.4A typical), and 17-cycle hiccup-mode current limiting. The 1ms power-good delay and internal soft-start (1ms default) ensure controlled power sequencing in embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports high-current digital loads like FPGA I/O banks without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and industrial 3.3V/5V rails. |
| Reference Voltage | 0.600V ±0.005V - enables precise output regulation down to 0.8V using external resistor divider; 0.8% total accuracy over temp/load/line. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - allows optimization of size (higher f = smaller L/C) vs. efficiency (lower f reduces switching loss). |
| Efficiency | Up to 95% at 3.3VOUT/4A - achieved via low RDS(on) FETs (45mΩ HS / 19mΩ LS) and synchronous rectification. |
| Duty Cycle | 100% - maintains regulation under ultra-low dropout conditions (e.g., 1.8VOUT from 2.0VIN), extending battery runtime. |
| Thermal Resistance | θJA = 45°C/W, θJC = 6.5°C/W - enabled by exposed pad QFN package; supports >3W dissipation in standard PCB layouts. |
Pinout & Package
ISL8024IRTAJZ-T7A is housed in a Pb-free 16-lead 3mm × 3mm TQFN package with exposed thermal pad (L16.3x3D), 1mm max height, requiring connection of the exposed pad to SGND for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires two 22µF ceramic capacitors to PGND for stability and ESR filtering. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt square wave; layout critical for EMI and efficiency. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switch return; must be separated from SGND until joined at single point. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, SYNC, FS, PG; connects to exposed pad and system analog ground. |
| FB (Pin 8) | Feedback input | Monitors output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); used by PG and UV/OV protection circuits. |
| COMP (Pin 9) | Error amplifier output | Internal compensation node; connect to SGND when FS = VIN; external RC network required if FS resistor used. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down; asserts soft-stop discharge during shutdown. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after soft-start; pulled low during faults, UVLO, or soft-start; requires external 10k–100kΩ pull-up to VIN. |
| SYNC (Pin 4) | Mode selection/synchronization | Logic high = PWM mode; logic low = PFM/skip mode; external clock input up to 4MHz (positive-edge triggered). |
| FS (Pin 6) | Frequency set | Resistor-to-SGND sets fSW from 500kHz–4MHz; tied to VIN for default 1MHz + internal compensation. |
| SS (Pin 7) | Soft-start timing | Tied to SGND for 1ms internal ramp; capacitor to SGND adjusts ramp time (TSS ≈ CSS × 1.6µA); max 33nF. |
| VDD (Pin 2) | Logic supply | Internally connected to VIN; powers internal bias circuitry and gate drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 45mΩ P-Channel HS + 19mΩ N-Channel LS MOSFETs reduce BOM count and improve efficiency over discrete solutions. |
| 100% Duty-Cycle Operation | Enables ultra-low dropout (e.g., 1.8VOUT from 1.95VIN) - critical for battery end-of-life operation in portable devices. |
| Pre-Biased Output Startup | Supports start-up into an already charged output rail without reverse current flow - essential for hot-swap and multi-rail sequencing. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault detection followed by auto-restart attempts prevents thermal runaway during sustained short-circuit events. |
| Soft-Stop Output Discharge | Internal 100Ω switch actively discharges output capacitor during shutdown - eliminates residual voltage that could damage downstream logic. |
| Flexible Light-Load Operation | Selectable PWM (low noise) or PFM (high efficiency) modes via SYNC pin - optimizes performance across full load range. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
|
Use Scenario: Compact, board-mounted DC/DC module supplying 1.2V/3A to 1.8V/4A for SoC cores in space-constrained edge AI accelerators. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated core voltage with fast load-transient response. Use Value: 95% peak efficiency and 100% duty cycle extend runtime; 16-pin 3×3mm QFN minimizes footprint to <0.22 in². |
Use Scenario: Powering ARM Cortex-A series microcontrollers and Xilinx Artix-7 FPGAs in industrial PLCs requiring robust power sequencing and fault recovery. IC Role / Device Role / Timing Role: Core voltage regulator with programmable soft-start, power-good signaling, and hiccup-mode OCP for system-level reliability. Use Value: 1ms PG delay and internal soft-start ensure deterministic boot; EN-controlled sequencing integrates cleanly with MCU GPIOs. |
| Plug-in DC/DC Modules for Routers | Li-ion Battery Powered Devices |
|
Use Scenario: Hot-pluggable 5V-input DC/DC daughterboard delivering 3.3V/4A to Ethernet PHYs and packet processors in enterprise routers. IC Role / Device Role / Timing Role: High-density, thermally optimized buck converter enabling modular, field-replaceable power subsystems. Use Value: Exposed-pad QFN with θJA = 45°C/W sustains 4A load without heatsink; SYNC pin allows PFM mode to reduce idle power in standby. |
Use Scenario: Main system regulator in handheld test equipment powered by single-cell Li-ion (3.0–4.2V), delivering 1.8V/4A to mixed-signal ASICs. IC Role / Device Role / Timing Role: High-efficiency step-down converter supporting wide input range and deep discharge (down to 2.7V VIN). Use Value: 100% duty cycle maintains regulation below 3.0V input; 50µA quiescent current in PFM mode maximizes battery life between measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B20RHLT | 4A, 4.5–18V input, 3.3mm × 3.3mm QFN, 0.6V ref, but lacks 100% duty cycle and pre-biased startup. | Better suited for higher-input industrial rails; not ideal for Li-ion direct feed or low-VIN POL use cases. | Choose ISL8024IRTAJZ-T7A when input can dip below 3V or pre-biased operation is required. |
| MP2315GJ-Z | 4A, 4.5–28V input, 3mm × 3mm QFN, 0.8V ref, no PFM mode, no soft-stop discharge, lower efficiency at light load. | Targeted at cost-sensitive 12V/24V systems; lacks critical features for portable/battery designs. | ISL8024IRTAJZ-T7A is preferred for battery-powered applications needing PFM, soft-stop, and sub-3V operation. |
Compared with TPS544B20RHLT and MP2315GJ-Z, ISL8024IRTAJZ-T7A uniquely combines 100% duty cycle, pre-biased startup, soft-stop discharge, and dual-mode (PWM/PFM) operation in a 3×3mm package - making it the only option among the three qualified for true low-VIN, high-reliability portable power design.
Availability
ISL8024IRTAJZ-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, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8024IRTAJZ-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 acquired Intersil in 2017 and continues to manufacture and support its high-performance analog and power management portfolio, including precision regulators and PMICs for industrial, automotive, and computing markets.
The ISL8024IRTAJZ-T7A belongs to Renesas' ISL802x family of compact synchronous buck regulators, designed specifically for high-efficiency, low-noise, space-constrained point-of-load applications in portable instrumentation, networking, and embedded computing.
FAQ
What is the maximum continuous output current of the ISL8024IRTAJZ-T7A?
The ISL8024IRTAJZ-T7A delivers up to 4A of continuous output current across the full operating temperature range (−40°C to +85°C) when properly heatsinked on a 4-layer PCB with adequate copper pour and thermal vias under the exposed pad. Derating applies above +85°C ambient per the device's thermal resistance (θJA = 45°C/W).
Does the ISL8024IRTAJZ-T7A support pre-biased output startup?
Yes, the ISL8024IRTAJZ-T7A supports pre-biased output startup. During soft-start, it operates in SKIP mode and avoids reverse current flow into the output capacitor, allowing safe turn-on when the output rail is already charged - a critical feature for hot-swap and multi-rail power systems.
How is the switching frequency configured on the ISL8024IRTAJZ-T7A?
The ISL8024IRTAJZ-T7A switching frequency is set via the FS pin: connecting FS to VIN configures 1MHz default frequency with internal compensation; connecting FS to SGND through a resistor (e.g., 402kΩ for ~490kHz, 42.2kΩ for ~4.2MHz) enables adjustment from 500kHz to 4MHz per Equation 1 in the datasheet.
What protection features does the ISL8024IRTAJZ-T7A include?
The ISL8024IRTAJZ-T7A integrates overtemperature shutdown (150°C trip), hiccup-mode overcurrent protection (17-cycle detection), overvoltage/undervoltage monitoring via PG, negative current limiting (−2.4A typical), and input undervoltage lockout (2.7V rising threshold). All protections are fully internal and require no external components.
Can the ISL8024IRTAJZ-T7A operate with a 2.7V input and 1.8V output?
Yes, the ISL8024IRTAJZ-T7A supports 2.7V input and 1.8V output. With its 100% duty-cycle capability and low RDS(on) P-FET (45mΩ), it achieves <200mV dropout at 4A - enabling stable 1.8V regulation even as input drops to 2.0V, making it ideal for Li-ion battery discharge profiles.
ISL8024IRTAJZ-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:
- 4A
- Frequency - Switching:
- 490kHz ~ 4.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8024IRTAJZ-T7A FAQ
1.How can I place an order for ISL8024IRTAJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8024IRTAJZ-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 ISL8024IRTAJZ-T7A reliable?
The price and inventory of ISL8024IRTAJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8024IRTAJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8024IRTAJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8024IRTAJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8024IRTAJZ-T7A?
ISL8024IRTAJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8024IRTAJZ-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 ISL8024IRTAJZ-T7A?
For technical support, including ISL8024IRTAJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8024IRTAJZ-T7A requirements.
6.How does Aetrix verify that ISL8024IRTAJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8024IRTAJZ-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 ISL8024IRTAJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8024IRTAJZ-T7A?
All ISL8024IRTAJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8024IRTAJZ-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 ISL8024IRTAJZ-T7A part is unused and in its original packaging.
Return procedure for ISL8024IRTAJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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