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Renesas ISL8023IRTAJZ
- Part No.:
- ISL8023IRTAJZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8023IRTAJZ.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,385
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Product details
Overview
ISL8023IRTAJZ 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 reference voltage with ±0.8% accuracy over temperature/load/line. It powers microcontroller cores, FPGAs, and DSPs in space-constrained portable instruments.
For engineers reviewing the ISL8023IRTAJZ datasheet, ISL8023IRTAJZ pinout, ISL8023IRTAJZ application, or ISL8023IRTAJZ equivalent, key selection criteria include its adjustable output capability, 100% duty-cycle operation for ultra-low dropout (<200mV at 3A), hiccup-mode overcurrent protection, and support for both PWM and PFM modes via SYNC pin control.
Technical Context
The ISL8023IRTAJZ 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 behavior across 500kHz–4MHz switching frequencies. Its dual-MOSFET power stage enables high-efficiency regulation with minimal external components.
It integrates fault protections including hiccup-mode overcurrent (5.2–7.8A peak limit), negative current detection (−1.8A to −3.0A), overvoltage, undervoltage, and thermal shutdown (150°C trip, 25°C hysteresis), plus soft-start (1ms internal or capacitor-adjustable) and soft-stop discharge via 100Ω internal switch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports core rail requirements for mid-tier µCs and FPGAs 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 regulated 3.3V supplies. |
| Reference Voltage | 0.600V ±0.8% - enables precise output setting down to 0.8V using external resistor divider; ensures tight regulation under load/temperature variation. |
| Switching Frequency | Adjustable 500kHz–4MHz; default 1MHz - allows optimization of inductor size (e.g., 1µH typical) and efficiency vs. EMI trade-offs. |
| Efficiency | Up to 95% - achieved via low RDS(on) integrated FETs (45mΩ HS / 19mΩ LS) and synchronous rectification, reducing conduction losses. |
| Duty Cycle | 100% - maintains regulation during deep input droop (e.g., Li-ion discharge), minimizing dropout voltage to ~135mV at 3A (45mΩ × 3A). |
| Thermal Resistance | θJA = 45°C/W, θJC = 6.5°C/W - enabled by exposed-pad 3×3 QFN package; supports >2W dissipation in standard PCB layouts. |
Pinout & Package
ISL8023IRTAJZ is housed in a 16-lead 3mm × 3mm Pb-free TQFN package with exposed thermal pad (PKG DWG # 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 high-frequency decoupling and stability. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt square wave; must be routed with minimal loop area to reduce EMI. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switching return; separate from SGND to avoid noise coupling into control circuitry. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, SYNC, FS, PG; must be connected to exposed pad and isolated from PGND except at single-point star ground. |
| FB (Pin 8) | Feedback input | Senses output voltage 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 | Provides transconductance amplifier output; tied to SGND in internal-compensation mode; used with external RC network when FS resistor is applied. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown on float; initiates soft-start and soft-stop discharge on transition. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after regulation; pulled low during fault, UVLO, or soft-start; requires external 10kΩ–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 with positive-edge trigger. |
| FS (Pin 6) | Frequency set | Resistor-to-SGND sets switching frequency (500kHz–4MHz); tied to VIN for default 1MHz and internal compensation. |
| SS (Pin 7) | Soft-start control | Tied to SGND for 1ms internal ramp; capacitor-to-SGND adjusts ramp time (TSS ≈ CSS × 1.6µA); max 33nF recommended. |
| VDD (Pin 2) | Internal logic supply | Internally derived from VIN; no external connection required - must be shorted to VIN per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 45mΩ P-Channel + 19mΩ N-Channel MOSFETs - eliminates external switches, reduces BOM count, and improves efficiency over discrete solutions. |
| 100% Duty-Cycle Operation | Enables <200mV dropout at full load - extends usable battery range in Li-ion systems by maintaining regulation down to VIN ≈ VOUT + IOUT × RDS(on). |
| Programmable Switching Frequency | 500kHz–4MHz via single FS resistor - allows layout-optimized inductor/capacitor selection and EMI spectrum shaping without changing IC. |
| Pre-Biased Output Start-Up | Supports hot-swap and rail sequencing - enables safe startup into an already charged output capacitor without reverse current or overshoot. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter followed by 8-soft-start-period recovery - prevents thermal runaway during sustained overload while enabling automatic recovery if fault clears. |
| Soft-Stop Output Discharge | Internal 100Ω switch discharges output on shutdown - eliminates need for external bleed resistor, ensuring rapid, controlled VOUT decay for system safety and sequencing. |
Applications
| DC/DC POL Modules | µC/µP and FPGA Core Power |
|---|---|
Use Scenario: Point-of-load conversion in compact embedded modules where board area and thermal density are constrained. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise 1.2V/1.8V core voltage with fast load-step response. Use Value: 3A capability and 95% peak efficiency minimize heat generation and enable single-layer thermal relief in 0.22 in² total solution size. | Use Scenario: Powering ARM Cortex-M or RISC-V microcontrollers and Xilinx Artix-7 FPGAs in handheld test equipment. IC Role / Device Role / Timing Role: Adjustable-output DC/DC converter delivering dynamically scaled core voltage with soft-start sequencing and PG monitoring. Use Value: 0.6V reference accuracy and 1ms PG delay ensure reliable processor boot; SYNC pin enables seamless transition between PWM (low noise) and PFM (high light-load efficiency). |
| Portable Instruments | Li-ion Battery-Powered Devices |
Use Scenario: Handheld multimeters and oscilloscope probes requiring stable analog and digital rails from a single battery cell. IC Role / Device Role / Timing Role: Main buck regulator supplying 3.3V I/O and 1.8V logic rails with ultra-low quiescent current (50µA in PFM) and UVLO protection. Use Value: 2.7V minimum input and 100% duty cycle extend operational runtime near battery end-of-discharge; exposed-pad QFN ensures thermal reliability in sealed enclosures. | Use Scenario: Wearables and medical sensors operating from 3.7V nominal Li-ion cells with strict battery life targets. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting dynamic voltage scaling and deep-sleep modes via EN and SYNC control. Use Value: PFM mode reduces no-load current to 50µA, doubling standby time versus fixed-frequency alternatives; soft-stop discharge prevents residual voltage from interfering with sleep-state entry. |
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 adjustable buck with 3.5–28V input, 570kHz fixed frequency, no PFM mode, higher RDS(on) (110mΩ/70mΩ) | Better suited for higher-input industrial rails; lacks light-load efficiency optimization and 100% duty cycle. | Select when input exceeds 5.5V or when fixed-frequency simplicity outweighs efficiency at light loads. |
| MP2315DJ-LF-Z | 3A buck with 4.5–28V input, 500kHz–2.5MHz adjustable frequency, no integrated soft-stop, lower accuracy reference (±1.5%) | Targets wider-input industrial applications; missing PG timing control and pre-biased start-up support. | Choose for cost-sensitive designs where 5.5V max input and precision sequencing are non-critical. |
Compared with TPS54331DR and MP2315DJ-LF-Z, ISL8023IRTAJZ delivers superior light-load efficiency via PFM mode, guaranteed pre-biased start-up, and integrated soft-stop discharge - making it optimal for battery-powered portable systems requiring long standby life and robust power sequencing.
Availability
ISL8023IRTAJZ is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA core power, and portable instrumentation requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support (−40°C to +85°C).
Supply support for ISL8023IRTAJZ 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 maintains full technical and manufacturing continuity for the ISL8023 family. Renesas is a global semiconductor leader specializing in microcontrollers, analog power, and connectivity solutions.
The ISL8023 series was designed specifically for high-density, battery-efficient point-of-load regulation in portable and embedded systems - emphasizing minimal external components, thermal robustness in tiny QFN packages, and seamless integration with µC/FPGA power trees.
FAQ
What is the maximum continuous output current rating for the ISL8023IRTAJZ?
The ISL8023IRTAJZ is rated for 3A continuous output current under the recommended operating conditions (TA = −40°C to +85°C, VIN = 2.7V–5.5V). This rating assumes proper PCB layout with thermal vias under the exposed pad and adequate airflow or copper pour. Peak current capability reaches 5.2–7.8A before hiccup-mode overcurrent protection activates.
Does the ISL8023IRTAJZ support pre-biased output start-up?
Yes, the ISL8023IRTAJZ explicitly supports pre-biased output start-up. During soft-start, the device operates in SKIP mode and avoids reverse current flow, allowing safe activation into an already charged output capacitor. This feature is confirmed in the "Theory of Operation" section (Page 16) and enables reliable hot-swap and multi-rail sequencing in complex power systems.
How is the switching frequency configured on the ISL8023IRTAJZ?
The ISL8023IRTAJZ switching frequency is set via the FS pin: connecting FS to VIN configures the default 1MHz operation with internal compensation; connecting a resistor from FS to SGND adjusts frequency from 500kHz to 4MHz per Equation 1 (RFS = 220kΩ / fOSC[kHz] − 14). No external clock is required unless synchronization to an external source is needed.
What protection features are integrated into the ISL8023IRTAJZ?
The ISL8023IRTAJZ integrates hiccup-mode overcurrent protection (17-cycle fault counter), negative current limiting (−1.8A to −3.0A), overvoltage and undervoltage lockout (UVLO at 2.2–2.7V), thermal shutdown (150°C trip, 25°C hysteresis), and soft-stop output discharge via a 100Ω internal switch - all documented in Sections 6 and 7 of FN7812 Rev 3.00.
Is the ISL8023IRTAJZ pin-compatible with the ISL8024IRTAJZ?
No, the ISL8023IRTAJZ and ISL8024IRTAJZ share identical pinout and package (16-lead 3×3 TQFN), but differ in current rating (3A vs. 4A) and corresponding MOSFET RDS(on) values (45mΩ/19mΩ vs. 35mΩ/12mΩ). They are functionally interchangeable only if the 4A capability of ISL8024IRTAJZ is not required and thermal design accommodates the slightly higher losses of ISL8023IRTAJZ at 3A.
ISL8023IRTAJZ 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:
- 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)
ISL8023IRTAJZ FAQ
1.How can I place an order for ISL8023IRTAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8023IRTAJZ 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 ISL8023IRTAJZ reliable?
The price and inventory of ISL8023IRTAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8023IRTAJZ is usually 5 days.
3.What payment methods are accepted for ISL8023IRTAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8023IRTAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8023IRTAJZ?
ISL8023IRTAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8023IRTAJZ 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 ISL8023IRTAJZ?
For technical support, including ISL8023IRTAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8023IRTAJZ requirements.
6.How does Aetrix verify that ISL8023IRTAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8023IRTAJZ 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 ISL8023IRTAJZ meets industry standards.
7.What is the process for return or replacement of ISL8023IRTAJZ?
All ISL8023IRTAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8023IRTAJZ, 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 ISL8023IRTAJZ part is unused and in its original packaging.
Return procedure for ISL8023IRTAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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