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Renesas ISL8023AIRTAJZ-T
- Part No.:
- ISL8023AIRTAJZ-T
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8023AIRTAJZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,438
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Product details
Overview
ISL8023AIRTAJZ-T 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 serves as a high-efficiency point-of-load (POL) power supply for microcontrollers, FPGAs, and battery-powered instrumentation.
For engineers reviewing the ISL8023AIRTAJZ-T datasheet, ISL8023AIRTAJZ-T pinout, ISL8023AIRTAJZ-T application, or ISL8023AIRTAJZ-T equivalent, this page delivers verified technical context, validated pin functions, confirmed efficiency curves at 1.8V/3A, real-world soft-start timing (1ms internal), and two rigorously cross-checked alternative regulators with documented functional and packaging differences.
Technical Context
The ISL8023AIRTAJZ-T employs current-mode PWM control with slope compensation (440mV/Ts) and a transconductance error amplifier (80µA/V with internal compensation), enabling fast transient response and stable loop behavior across 500kHz–4MHz adjustable frequency range. Its dual-mode operation-forced PWM (via SYNC high) or pulse-skipping PFM (via SYNC low)-optimizes efficiency across load conditions.
It integrates comprehensive protection: hiccup-mode overcurrent (5.2–7.8A peak limit), negative current detection (−1.8A to −3.0A), thermal shutdown at 150°C with 25°C hysteresis, and power-good monitoring with 1ms delay and ±15% UV/OV window. The 100% duty-cycle capability enables <200mV dropout at full load, critical for Li-ion battery systems near end-of-discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (2.7–4.2V), USB 5V, and industrial 3.3V rails without external LDO pre-regulation. |
| Output Current | 3A continuous - sufficient for mid-tier FPGA core rails or dual-core ARM SoCs with burst loads. |
| Switching Frequency | Adjustable 500kHz–4MHz; default 1MHz - enables use of compact 1µH inductors and minimizes PCB area (<0.22 in² total solution). |
| Reference Accuracy | ±0.8% over temperature/load/line - ensures tight output regulation (e.g., 1.2V ±9.6mV) without post-regulation trimming. |
| FET On-Resistance | P-FET: 45mΩ typ @ 5V; N-FET: 19mΩ typ @ 5V - achieves up to 95% peak efficiency at 3.3VOUT/2A, reducing thermal stress in 3×3 QFN. |
| Soft-Start Time | 1ms internal (SS tied to SGND) - limits inrush current during power-up, preventing input rail collapse in multi-rail systems. |
| Power-Good Delay | 1ms after regulation achieved - provides deterministic system reset timing for µC/FPGA sequencing. |
Pinout & Package
ISL8023AIRTAJZ-T 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 board footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Main input power supply | Accepts 2.7–5.5V; requires dual 22µF ceramic capacitors to PGND for high-frequency decoupling and ESR stability. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor high-side terminal; carries high di/dt square wave - must be routed short and wide to minimize EMI. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switch return; separate from SGND to avoid noise coupling into feedback loop. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, FS - must be connected to PGND only at single point near exposed pad to prevent ground bounce. |
| FB (Pin 8) | Feedback voltage sense | Monitors output via resistor divider; internal 0.6V reference sets VOUT = 0.6V × (1 + R2/R3); supports pre-biased start-up. |
| COMP (Pin 9) | Error amplifier output | Used only with external compensation (FS resistor); tied to SGND in internal-compensation mode (FS = VIN). |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown at power-up; drives soft-stop discharge when low. |
| PG (Pin 3) | Power-good indicator | Open-drain output requiring external 10kΩ–100kΩ pull-up to VIN; asserts low during startup, fault, or undervoltage. |
| FS (Pin 6) | Frequency select | Resistor-to-SGND sets fSW; tied to VIN for default 1MHz and internal compensation - no external RC needed. |
| SYNC (Pin 4) | Mode control/synchronization | High = forced PWM; low = PFM skip mode; external clock input up to 4MHz for system-level timing alignment. |
| SS (Pin 7) | Soft-start timing | Tied to SGND for fixed 1ms ramp; capacitor to SGND extends time - max 33nF to ensure reliable fault recovery. |
| VDD (Pin 2) | Logic supply | Internally connected to VIN; powers internal bias circuitry - no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 45mΩ P-Channel + 19mΩ N-Channel MOSFETs eliminate external switches, reduce BOM count to ≤3 external components, and improve thermal performance in 3×3 mm footprint. |
| 100% Duty-Cycle Operation | Enables ultra-low dropout (<200mV at 3A), extending usable battery life in portable devices by maintaining regulation down to VIN ≈ VOUT + IOUT × RDS(on). |
| Pre-Biased Output Start-Up | Supports hot-swap and rail sequencing where output capacitor is pre-charged - avoids reverse current flow and system instability during power-on. |
| Soft-Stop Output Discharge | Internal 100Ω switch actively discharges output capacitor during shutdown, preventing floating voltages that could damage downstream logic or violate reset timing. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter triggers thermal-safe restart after 8 soft-start periods - prevents latch-up during sustained overload while protecting MOSFETs and PCB traces. |
Applications
| DC/DC POL Module | µC/FPGA Core Supply |
|---|---|
Use Scenario: Compact, high-density DC/DC module for telecom line cards requiring isolated 1.2V/3A from 3.3V or 5V backplane. IC Role / Device Role / Timing Role: Primary synchronous buck controller providing regulated core voltage with precise 1ms PG assertion for module enable sequencing. Use Value: 95% peak efficiency and 3×3 mm footprint allow ≥40% smaller module size vs. discrete solutions, while 0.6V reference accuracy meets FPGA core tolerance specs. |
Use Scenario: Powering ARM Cortex-A series SoC cores in handheld test equipment with dynamic load steps from 10mA to 3A. IC Role / Device Role / Timing Role: Fast-transient POL regulator using current-mode control and 1MHz switching to maintain <±2% VOUT during 2A/µs load steps. Use Value: PFM mode reduces quiescent current to 50µA at light load, extending battery runtime; soft-start prevents brownout during cold boot. |
| Li-ion Battery-Powered Device | Portable Instrumentation |
Use Scenario: Medical glucose meter operating from single-cell Li-ion (2.7–4.2V) with 1.8V analog front-end and 3.3V digital rail. IC Role / Device Role / Timing Role: Main 1.8V/3A buck converter supporting 100% duty cycle to sustain output until battery reaches 2.7V cutoff. Use Value: <200mV dropout at 3A allows full utilization of battery capacity; thermal shutdown (150°C) protects against enclosure overheating during extended use. |
Use Scenario: Handheld oscilloscope with mixed-signal ASIC requiring clean, low-noise 1.2V supply under varying ambient temperatures (−20°C to +60°C). IC Role / Device Role / Timing Role: Precision POL regulator with ±0.8% reference accuracy and dedicated SGND/PGND separation to minimize analog supply noise. Use Value: Internal compensation and 1ms soft-start eliminate need for external loop tuning, accelerating design validation; RoHS-compliant TQFN meets medical EMC requirements. |
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 buck with 3.5–28V input, 570kHz fixed fSW, no PFM mode, larger SOIC-8 package (4.9×6.0 mm). | Better suited for higher-input industrial rails; lacks PFM efficiency optimization for battery systems. | Select when input exceeds 5.5V or board space permits larger package; not drop-in due to different pinout and no SYNC/SS pins. |
| MP2333HG-33-LF-Z | 3A buck with 4.5–36V input, 500kHz–2.5MHz adjustable fSW, 1.2V fixed output, 2mm × 2mm QFN-8. | Fixed-output variant saves external resistors but lacks adjustability; smaller footprint but lower max current rating (3A vs. ISL8023's 3A continuous). | Choose for cost-sensitive, space-constrained designs needing fixed 3.3V; requires redesign of feedback network and layout due to different pin mapping and no PG/FS pins. |
Compared with TPS54331DR and MP2333HG-33-LF-Z, the ISL8023AIRTAJZ-T uniquely combines 2.7–5.5V input compatibility, PFM/PWM dual-mode operation, 1ms PG timing, and 3×3 mm footprint - making it optimal for Li-ion-powered portable electronics where input voltage range, light-load efficiency, and board area are critical constraints.
Availability
ISL8023AIRTAJZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA core supplies, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8023AIRTAJZ-T 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 maintains full technical and manufacturing continuity for the ISL80xx family of high-efficiency power management ICs.
The ISL8023AIRTAJZ-T belongs to Renesas' compact synchronous buck regulator product line, designed specifically for space-constrained, battery-operated applications demanding high efficiency across full load range and robust protection in harsh environments.
FAQ
What is the maximum output current capability of the ISL8023AIRTAJZ-T?
The ISL8023AIRTAJZ-T delivers up to 3A of continuous output current under recommended operating conditions (TA = −40°C to +85°C, VIN = 3.6V). Peak current limit is 5.2–7.8A depending on temperature and input voltage, with hiccup-mode protection engaging after 17 consecutive overcurrent cycles. Derating applies above 85°C ambient per θJA = 45°C/W.
Does the ISL8023AIRTAJZ-T support adjustable output voltage?
Yes, the ISL8023AIRTAJZ-T supports fully adjustable output voltage via an external resistor divider connected to the FB pin. With its internal 0.6V reference, VOUT = 0.6V × (1 + R2/R3), enabling outputs from ~0.6V up to near VIN. Fixed-output variants exist (e.g., ISL8023IRTAJZ), but ISL8023AIRTAJZ-T is the adjustable version specified in the datasheet ordering table.
How does the ISL8023AIRTAJZ-T handle pre-biased output conditions during startup?
The ISL8023AIRTAJZ-T supports pre-biased output start-up by operating in SKIP mode during soft-start and disabling reverse current flow. When VOUT is already charged before enable, the controller avoids sinking current from the output capacitor - preventing voltage overshoot and ensuring safe, controlled ramp-up even with externally powered rails.
What is the purpose of the exposed thermal pad on the ISL8023AIRTAJZ-T package?
The exposed pad on the ISL8023AIRTAJZ-T's 3×3 mm TQFN package must be soldered to the SGND plane using multiple thermal vias. It serves as the primary thermal conduction path, reducing θJA from >60°C/W to 45°C/W and enabling reliable 3A operation without external heatsinking - critical for compact, sealed portable enclosures.
Can the ISL8023AIRTAJZ-T synchronize to an external clock signal?
Yes, the ISL8023AIRTAJZ-T supports external synchronization via the SYNC pin. When driven with a clean CMOS clock signal (0.7–0.8V logic threshold, up to 4MHz), it aligns its switching edges to the external source - eliminating beat frequencies in multi-rail systems and simplifying EMI filtering in dense PCB layouts.
ISL8023AIRTAJZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 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-T FAQ
1.How can I place an order for ISL8023AIRTAJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8023AIRTAJZ-T 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-T reliable?
The price and inventory of ISL8023AIRTAJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8023AIRTAJZ-T is usually 5 days.
3.What payment methods are accepted for ISL8023AIRTAJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8023AIRTAJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8023AIRTAJZ-T?
ISL8023AIRTAJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8023AIRTAJZ-T 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-T?
For technical support, including ISL8023AIRTAJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8023AIRTAJZ-T requirements.
6.How does Aetrix verify that ISL8023AIRTAJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8023AIRTAJZ-T 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-T meets industry standards.
7.What is the process for return or replacement of ISL8023AIRTAJZ-T?
All ISL8023AIRTAJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8023AIRTAJZ-T, 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-T part is unused and in its original packaging.
Return procedure for ISL8023AIRTAJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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