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Renesas ISL8023AIRTAJZ-T7A
- Part No.:
- ISL8023AIRTAJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8023AIRTAJZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,545
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Product details
Overview
ISL8023AIRTAJZ-T7A from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 3A 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 ±0.8% reference accuracy. It supports 100% duty-cycle operation for ultra-low dropout and is used in point-of-load power for microcontrollers and FPGAs.
For engineers reviewing the ISL8023AIRTAJZ-T7A datasheet, ISL8023AIRTAJZ-T7A pinout, ISL8023AIRTAJZ-T7A application, or ISL8023AIRTAJZ-T7A equivalent, key selection criteria include adjustable switching frequency (500kHz–4MHz), internal/external soft-start (1ms fixed or capacitor-adjustable), hiccup-mode overcurrent protection, and PG output with 1ms delay and ±15% window monitoring.
Technical Context
The ISL8023AIRTAJZ-T7A employs current-mode PWM control with slope compensation (440mV/Ts) and a transconductance error amplifier (80µA/V typical) for fast transient response and stable loop dynamics. Its dual-mode operation-PWM (forced continuous) or PFM (discontinuous at light load)-is selected via the SYNC pin, enabling optimization between low-noise performance and high efficiency.
It integrates comprehensive fault protection: overcurrent (5.2–7.8A peak limit), negative current detection (−1.8A to −3.0A), overvoltage (0.8V PG threshold), undervoltage (80–90% of nominal), thermal shutdown (150°C), and UVLO (2.2–2.7V). Soft-stop discharge through a 100Ω internal switch activates during shutdown to rapidly collapse the output voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports compact POL designs for mid-power digital loads without external current-sense resistors. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion, USB-powered, and 3.3V/5V system rails. |
| Reference Voltage | 0.600V ±0.8% - enables precise output regulation across temperature, line, and load for <±1% VOUT accuracy with proper feedback divider. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - allows trade-off between component size (higher fSW → smaller L/C) and efficiency (lower fSW → reduced switching loss). |
| Efficiency | Up to 95% - achieved via low RDS(on) integrated FETs (45mΩ HS / 19mΩ LS) and optimized gate drive, minimizing conduction and switching losses. |
| Power-Good Accuracy | ±15% output window with 1ms delay - provides reliable sequencing signal for downstream logic while rejecting brief transients. |
| Quiescent Current | 50µA (no load, PFM mode) - extends battery life in always-on or low-duty-cycle portable applications. |
Pinout & Package
ISL8023AIRTAJZ-T7A is housed in a 16-lead 3mm × 3mm Pb-free TQFN package with exposed thermal pad (PKG DWG # L16.3x3D), optimized for high-density PCB layouts and thermal dissipation (θJA = 45°C/W, θJC = 6.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7V–5.5V; requires two 22µF ceramic capacitors to PGND for stable high-frequency decoupling. |
| 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 switching loop; must be separated from SGND and tied under exposed pad. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, FS, SYNC, PG; must connect to exposed pad via multiple vias for noise immunity. |
| FB (Pin 8) | Feedback input | Monitors output via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); also used by PG and UV/OV comparators. |
| COMP (Pin 9) | Error amplifier output | Internal compensation node; connect to SGND when using default 1MHz configuration; otherwise used for external loop tuning. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe default-off state; initiates soft-start on rising edge. |
| PG (Pin 3) | Power-good indicator | Open-drain output requiring external pull-up; asserts after 1ms once VOUT reaches regulation ±15% window. |
| SS (Pin 7) | Soft-start timing | Internal 1ms ramp when tied to SGND; capacitor-to-SGND adjusts ramp time (TSS ≈ Css × 1.6µA); max 33nF recommended. |
| FS (Pin 6) | Frequency select | Resistor-to-SGND sets fSW (500kHz–4MHz); tied to VIN for default 1MHz with internal compensation. |
| SYNC (Pin 4) | Mode control/sync input | Logic high = PWM mode; logic low = PFM/skip mode; external clock input up to 4MHz for synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 45mΩ P-Channel HS + 19mΩ N-Channel LS enable full converter solution with only 3 external components (inductor + 2 caps). |
| 100% Duty-Cycle Operation | Supports <200mV dropout at 4A - maintains regulation down to VIN ≈ VOUT + IOUT × RDS(on)_HS, extending battery runtime. |
| Pre-Biased Output Start-Up | Operates in SKIP mode during soft-start to safely charge into pre-biased outputs without reverse current or overshoot. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter triggers shutdown and auto-restart after eight soft-start periods - prevents thermal runaway during sustained overload. |
| Programmable Soft-Start | 1ms internal ramp (SS = SGND) or capacitor-adjustable (Css = 1nF–33nF) - controls inrush current and avoids input rail sag during power-up. |
Applications
| DC/DC POL Modules | μC/µP and FPGA Core Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC module supplying 1.2V/1.8V/3.3V to ASICs or SoCs in space-constrained industrial controllers. IC Role / Device Role / Timing Role: Primary step-down regulator with integrated power stage and PG signaling for system sequencing. Use Value: Eliminates external MOSFETs and reduces BOM count to ≤3 passive components, cutting footprint to <0.22 in². |
Use Scenario: Core voltage supply for ARM Cortex-M7 or Xilinx Artix-7 FPGA in portable test equipment requiring clean, sequenced power. IC Role / Device Role / Timing Role: High-efficiency, low-noise POL regulator with 1ms PG delay and soft-start for deterministic boot timing. Use Value: 95% peak efficiency and PFM mode reduce heat generation and extend battery life in handheld instruments. |
| Li-ion Battery-Powered Devices | Plug-in DC/DC Modules for Routers |
Use Scenario: Single-cell (3.0–4.2V) battery-powered medical sensor node requiring stable 1.8V output across full battery discharge curve. IC Role / Device Role / Timing Role: Adaptive buck converter supporting 100% duty cycle to maintain regulation down to 2.7V input. Use Value: Maximizes usable battery capacity by sustaining output until VIN drops to 2.7V, not 3.0V or higher. |
Use Scenario: Hot-pluggable 12V-to-3.3V intermediate bus converter in modular network switches with strict thermal and EMI limits. IC Role / Device Role / Timing Role: Synchronized PWM regulator (via SYNC pin) to avoid beat frequencies with other system clocks. Use Value: External frequency synchronization up to 4MHz enables EMI spread-spectrum alignment and noise reduction in dense backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54331DR | 3A, 3.5–28V input, 570kHz fixed fSW, no PFM mode, 1.22V reference, larger SOIC-8 package | Better suited for higher-input industrial supplies; lacks light-load efficiency optimization and compact QFN footprint | Select when input exceeds 5.5V or when fixed-frequency-only operation is preferred over dual-mode flexibility. |
| MP2333HG-33-P | 3A, 4.5–28V input, 1.3V fixed output, 500kHz fSW, integrated compensation, smaller 8-pin QFN | Fixed-output variant only; no adjustable VOUT or FS/SYNC pins; lower integration for cost-sensitive volume designs | Choose for simplified 3.3V POL where adjustability, frequency tuning, and PG timing are not required. |
Compared with TPS54331DR and MP2333HG-33-P, ISL8023AIRTAJZ-T7A offers wider input range compatibility with Li-ion sources, superior light-load efficiency via PFM, and finer control over soft-start, frequency, and protection behavior - making it optimal for portable, thermally constrained, and dynamically loaded systems.
Availability
ISL8023AIRTAJZ-T7A is available at Aetrix Electronics and suitable for DC/DC POL modules, μC/FPGA core power, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8023AIRTAJZ-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 acquired Intersil in 2017 and continues to develop and support its high-performance analog and power management portfolio.
The ISL8023AIRTAJZ-T7A belongs to Renesas' ISL802x family of compact synchronous buck regulators, designed specifically for space- and efficiency-critical point-of-load applications in portable, industrial, and communications equipment.
FAQ
What is the maximum output current capability of the ISL8023AIRTAJZ-T7A?
The ISL8023AIRTAJZ-T7A delivers up to 3A of continuous output current under typical operating conditions (TA = +25°C, VIN = 3.6V). Peak current capability reaches 5.2–7.8A depending on thermal design and ambient conditions, limited by internal hiccup-mode overcurrent protection that triggers after 17 consecutive fault cycles.
Does the ISL8023AIRTAJZ-T7A support adjustable output voltage?
Yes, the ISL8023AIRTAJZ-T7A is an adjustable-output regulator. Output voltage is set externally via a resistor divider connected to the FB pin, with VOUT = 0.6V × (1 + R2/R3). The 0.6V reference has ±0.8% accuracy over temperature, line, and load, enabling stable outputs from ~0.6V up to near VIN minus conduction losses.
How does the ISL8023AIRTAJZ-T7A handle startup into a pre-biased output?
The ISL8023AIRTAJZ-T7A supports pre-biased output start-up by operating in SKIP mode during soft-start. This prevents reverse current flow and output overshoot when the output capacitor is already charged. The internal soft-start ramp begins only after detecting VFB < 0.1V, ensuring safe, controlled voltage ramp-up regardless of initial output condition.
What thermal performance can be expected from the ISL8023AIRTAJZ-T7A in a standard PCB layout?
In a standard 4-layer PCB with 2oz copper, thermal vias under the exposed pad, and adequate copper pour, the ISL8023AIRTAJZ-T7A achieves θJA ≈ 45°C/W. At 3A load and 5V input, typical power dissipation is ~0.4W, resulting in ~18°C junction-to-ambient rise above ambient - well within the 125°C max operating junction temperature.
Can the ISL8023AIRTAJZ-T7A be synchronized to an external clock?
Yes, the ISL8023AIRTAJZ-T7A supports external clock synchronization via the SYNC pin. When driven with a clean CMOS-level square wave (0.7–0.8V logic high threshold, 0.15V hysteresis), it locks to input frequencies up to 4MHz, enabling EMI reduction through frequency alignment in multi-rail systems.
ISL8023AIRTAJZ-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:
- 3A
- 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)
ISL8023AIRTAJZ-T7A FAQ
1.How can I place an order for ISL8023AIRTAJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8023AIRTAJZ-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 ISL8023AIRTAJZ-T7A reliable?
The price and inventory of ISL8023AIRTAJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8023AIRTAJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8023AIRTAJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8023AIRTAJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8023AIRTAJZ-T7A?
ISL8023AIRTAJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8023AIRTAJZ-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 ISL8023AIRTAJZ-T7A?
For technical support, including ISL8023AIRTAJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8023AIRTAJZ-T7A requirements.
6.How does Aetrix verify that ISL8023AIRTAJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8023AIRTAJZ-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 ISL8023AIRTAJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8023AIRTAJZ-T7A?
All ISL8023AIRTAJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8023AIRTAJZ-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 ISL8023AIRTAJZ-T7A part is unused and in its original packaging.
Return procedure for ISL8023AIRTAJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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