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Renesas ISL8024AIRTAJZ-T7A
- Part No.:
- ISL8024AIRTAJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8024AIRTAJZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 4A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,899
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Product details
Overview
ISL8024AIRTAJZ-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 ±0.5% reference voltage. It enables compact, high-efficiency point-of-load power for FPGA core rails in portable instrumentation.
For engineers reviewing the ISL8024AIRTAJZ-T7A datasheet, ISL8024AIRTAJZ-T7A pinout, ISL8024AIRTAJZ-T7A application, or ISL8024AIRTAJZ-T7A equivalent, key selection considerations include its 100% duty-cycle capability (<200mV dropout at 4A), hiccup-mode overcurrent protection, soft-stop output discharge, and adjustable 500kHz–4MHz switching frequency with external synchronization support.
Technical Context
The ISL8024AIRTAJZ-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 loop stability. Its dual-mode operation-forced continuous conduction (PWM) or discontinuous conduction (PFM)-is selected via the SYNC pin, enabling noise-sensitive or efficiency-critical design trade-offs.
It integrates comprehensive fault protection: overtemperature shutdown (150°C trip, 25°C hysteresis), overvoltage/undervoltage monitoring via PG, negative current limiting (−2.4A typical), and 17-cycle hiccup-mode overcurrent recovery. The 1ms PG delay and soft-start ramp are hardware-configurable via SS pin connection or capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports high-current FPGA I/O or microcontroller core rails 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. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - enables optimization of inductor size (e.g., 1µH at 1MHz) and EMI profile. |
| Reference Voltage | 0.600V ±0.5% over temp/load/line - ensures tight output regulation (e.g., 1.2V ±6mV with 2-resistor divider). |
| Efficiency | Up to 95% at 1.8V/4A, 5VIN - minimizes thermal load in space-constrained modules. |
| Duty Cycle | 100% - maintains regulation down to <200mV dropout (e.g., 1.8V out at 4A with 45mΩ HS FET). |
| Quiescent Current | 50µA in PFM no-load mode - extends battery runtime in always-on subsystems. |
Pinout & Package
ISL8024AIRTAJZ-T7A is housed in a 16-lead 3mm × 3mm Pb-free TQFN package with exposed thermal pad (L16.3x3D), optimized for low θJA = 45°C/W and minimal PCB area (<0.22 in²).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires dual 22µF ceramic decoupling to PGND for stable high-frequency operation. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt; must be routed short and wide to minimize EMI and voltage spikes. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-side/N-FET current; separate from SGND to avoid noise coupling into feedback loop. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, SYNC, FS, PG; tied to exposed pad for optimal thermal/electrical performance. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); monitors regulation for PG assertion. |
| COMP (Pin 9) | Error amplifier output | Internal compensation node; connect to SGND when using default 1MHz configuration (FS = VIN). |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown on floating; initiates soft-start on rising edge. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay; pulled low during startup, fault, or undervoltage; requires external 10k–100kΩ pull-up to VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 45mΩ P-Channel + 19mΩ N-Channel MOSFETs - eliminates external switches, reduces BOM count, and enables >95% peak efficiency. |
| 100% Duty-Cycle Operation | Enables ultra-low dropout (e.g., 180mV at 4A) - extends usable battery range in Li-ion systems down to ~2.0V input. |
| Configurable Light-Load Mode | PWM (SYNC = HI) or PFM (SYNC = LO) - selectable per system noise vs. efficiency requirements without firmware change. |
| Soft-Stop Output Discharge | Internal 100Ω switch discharges output capacitor on shutdown - prevents back-powering of downstream circuitry and ensures clean sequencing. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault detection followed by 8-soft-start-cycle retry - protects against sustained shorts while enabling automatic recovery without host intervention. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC converter supplying 1.2V/3A to ARM-based SoC cores in handheld test equipment. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated core voltage with fast load-step response. Use Value: 95% efficiency at full load reduces thermal footprint; 1ms PG delay enables reliable power sequencing with host processor. |
Use Scenario: Core rail for Xilinx Artix-7 FPGA in portable spectrum analyzer requiring 1.0V/4A with <±1% regulation. IC Role / Device Role / Timing Role: High-current step-down regulator with pre-biased start-up support and soft-start ramp control. Use Value: 100% duty cycle sustains regulation as battery drops to 2.8V; internal 45mΩ/19mΩ FETs eliminate discrete switch losses. |
| Plug-in DC/DC Modules for Routers | Li-ion Battery Powered Devices |
Use Scenario: Hot-pluggable 5V-to-3.3V/4A module for enterprise router line cards requiring rapid enable/disable and fault isolation. IC Role / Device Role / Timing Role: Standalone buck controller with PG signaling and hiccup-mode protection for field-replaceable units. Use Value: Open-drain PG provides status to system manager; soft-stop discharge prevents bus contention during hot-swap events. |
Use Scenario: Main system rail in handheld medical monitor powered by single-cell Li-ion (3.0–4.2V), delivering 1.8V/4A to ADC and RF front-end. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent buck regulator supporting both active and standby modes. Use Value: 50µA PFM quiescent current maximizes battery life in sleep mode; 16-pin 3×3mm QFN fits tight layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B20RTWR | 4A, 4.5–18V input, 500kHz–2MHz sync, 0.6V ref, but larger 4×4mm QFN and higher min input voltage. | Requires ≥4.5V input - unsuitable for direct Li-ion (2.7–4.2V) operation without pre-regulation. | Choose for higher-input industrial rails where input exceeds 4.5V and board space allows larger package. |
| MP2345DJ-LF-Z | 4A, 4.5–18V input, fixed 500kHz, 0.8V ref, no PFM mode, no soft-stop discharge, smaller 2×2mm QFN. | Lacks 100% duty cycle and PFM mode - lower light-load efficiency and reduced battery depth-of-discharge capability. | Choose for cost-sensitive, space-constrained designs with stable >4.5V input and no requirement for ultra-low dropout or battery extension. |
Compared with TPS544B20RTWR and MP2345DJ-LF-Z, the ISL8024AIRTAJZ-T7A uniquely supports 2.7V input, 100% duty cycle, and PFM/PWM mode selection - making it optimal for single-cell Li-ion and portable instrumentation where input range, efficiency across load, and sequencing control are critical.
Availability
ISL8024AIRTAJZ-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 ISL8024AIRTAJZ-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 Corporation is a global semiconductor leader delivering trusted embedded solutions, including high-performance analog and power management ICs for industrial, automotive, and communications markets.
The ISL8024AIRTAJZ-T7A belongs to Renesas' high-efficiency monolithic buck regulator product line, designed specifically for space-constrained, battery-sensitive applications demanding high current density, low quiescent power, and robust fault protection.
FAQ
What is the maximum continuous output current of the ISL8024AIRTAJZ-T7A?
The ISL8024AIRTAJZ-T7A delivers up to 4A of continuous output current under recommended operating conditions (TA = −40°C to +85°C, VIN = 3.6V). This rating assumes proper PCB layout with thermal vias under the exposed pad and adequate input/output capacitance. Derating applies above +85°C ambient or with insufficient copper area.
Does the ISL8024AIRTAJZ-T7A support pre-biased output startup?
Yes, the ISL8024AIRTAJZ-T7A supports pre-biased output startup. During soft-start, it operates in SKIP mode and actively controls the high-side FET to prevent reverse current flow, allowing safe startup into an already charged output capacitor - essential for hot-swap and multi-rail sequencing applications.
How is the switching frequency configured on the ISL8024AIRTAJZ-T7A?
The ISL8024AIRTAJZ-T7A switching frequency is set via the FS pin: connecting FS to VIN configures 1MHz internal compensation; connecting FS to SGND through a resistor (RFS) adjusts frequency from 500kHz to 4MHz per RFS = 220kΩ / fOSC(kHz) − 14. External synchronization up to 4MHz is also supported via the SYNC pin.
What protection features does the ISL8024AIRTAJZ-T7A include?
The ISL8024AIRTAJZ-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 UVLO (2.7V rising threshold). All protections are fully internal - no external components required.
Can the ISL8024AIRTAJZ-T7A operate with a 2.7V input supply?
Yes, the ISL8024AIRTAJZ-T7A is fully specified for 2.7V minimum input voltage. Its 100% duty-cycle capability ensures regulation even as input drops near the output voltage - for example, sustaining 1.8V/4A output with only ~200mV dropout when VIN falls to 2.0V, making it ideal for single-cell Li-ion systems.
ISL8024AIRTAJZ-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)
ISL8024AIRTAJZ-T7A FAQ
1.How can I place an order for ISL8024AIRTAJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8024AIRTAJZ-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 ISL8024AIRTAJZ-T7A reliable?
The price and inventory of ISL8024AIRTAJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8024AIRTAJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8024AIRTAJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8024AIRTAJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8024AIRTAJZ-T7A?
ISL8024AIRTAJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8024AIRTAJZ-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 ISL8024AIRTAJZ-T7A?
For technical support, including ISL8024AIRTAJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8024AIRTAJZ-T7A requirements.
6.How does Aetrix verify that ISL8024AIRTAJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8024AIRTAJZ-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 ISL8024AIRTAJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8024AIRTAJZ-T7A?
All ISL8024AIRTAJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8024AIRTAJZ-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 ISL8024AIRTAJZ-T7A part is unused and in its original packaging.
Return procedure for ISL8024AIRTAJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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