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Renesas ISL8023IRTAJZ-T7
- Part No.:
- ISL8023IRTAJZ-T7
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8023IRTAJZ-T7.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,927
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Product details
Overview
ISL8023IRTAJZ-T7 from Renesas Electronics (formerly Intersil) is a monolithic synchronous buck DC/DC 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 serves as a compact, high-efficiency point-of-load (POL) power supply for microcontrollers and FPGAs in space-constrained portable instruments.
For engineers reviewing the ISL8023IRTAJZ-T7 datasheet, ISL8023IRTAJZ-T7 pinout, ISL8023IRTAJZ-T7 application, or ISL8023IRTAJZ-T7 equivalent, key selection criteria include its adjustable output (via external resistor divider), 100% duty-cycle operation enabling <200mV dropout at full load, hiccup-mode overcurrent protection, and support for both PWM and PFM modes via SYNC pin control.
Technical Context
The ISL8023IRTAJZ-T7 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 power stage enables high efficiency-up to 95% at 3.3VOUT/1.8VIN-and supports pre-biased output startup.
Operation spans 500kHz–4MHz via FS pin resistor programming; default 1MHz setting enables minimal external component count (as few as three passive parts). The device integrates soft-start (1ms internal or adjustable), soft-stop output discharge, power-good monitoring with 1ms delay, and comprehensive fault protection including overtemperature (150°C shutdown), overvoltage, undervoltage, and negative current limiting (−2.4A typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports μC/FPGA core rails without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V) and 3.3V/5V system rails. |
| Reference Voltage | 0.600V ±0.8% - enables precise output regulation down to 0.6V with external feedback divider. |
| Switching Frequency | Adjustable 500kHz–4MHz; default 1MHz - balances efficiency, size, and EMI for compact PCB layouts. |
| Efficiency | Up to 95% at 1.8VOUT/3A - minimizes thermal load in sealed portable enclosures. |
| Thermal Resistance | θJA = 45°C/W - requires minimal copper area for thermal management in 3×3 QFN package. |
| Protection Features | Hiccup-mode OCP, −2.4A negative current limit, 150°C thermal shutdown with 25°C hysteresis - ensures robust operation under fault conditions. |
Pinout & Package
ISL8023IRTAJZ-T7 is housed in a 16-lead 3mm × 3mm Pb-free TQFN package with exposed thermal pad (PKG DWG # L16.3x3D), optimized for low profile (<1mm height) and high thermal performance via direct SGND connection through multiple vias.
| 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 ripple suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt current - demands short, low-inductance routing. |
| PGND (Pins 11, 12) | Power ground return | Separate from SGND; must be tied to VIN capacitor ground plane to minimize noise coupling. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, FS, SYNC, PG; must connect to exposed pad for proper biasing. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; internal 0.6V reference enables adjustable VOUT from 0.6V to VIN−losses. |
| COMP (Pin 9) | Error amplifier output | Used only when external compensation is applied; otherwise connected to SGND for internal compensation. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown on floating condition. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after regulation; requires external 10kΩ–100kΩ pull-up to VIN. |
| FS (Pin 6) | Frequency select | Resistor-to-SGND sets fSW from 500kHz–4MHz; tied to VIN for default 1MHz internal compensation. |
| SYNC (Pin 4) | Mode control/synchronization | Logic-high = forced PWM; logic-low = PFM; external clock input enables system-level synchronization. |
| SS (Pin 7) | Soft-start timing | Tied to SGND for fixed 1ms ramp; capacitor to SGND adjusts ramp time (max 33nF). |
| VDD (Pin 2) | Internal logic supply | Internally derived from VIN; no external connection required - simplifies layout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 45mΩ P-FET + 19mΩ N-FET - eliminates external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| 100% Duty-Cycle Operation | Enables <200mV dropout at 3A - extends battery runtime in Li-ion systems near end-of-discharge. |
| Pre-Biased Output Startup | Supports start-up into existing output voltage - prevents reverse current flow in multi-rail systems with staggered power sequencing. |
| Soft-Stop Discharge | Internal 100Ω switch discharges output capacitor during shutdown - avoids residual voltage hazards in hot-swap applications. |
| Flexible Compensation | Internal RC network (55pF/100kΩ) suffices for most designs; COMP pin allows fine-tuning for aggressive transient loads. |
| Multi-Mode Control | PWM (low-noise, fixed-freq), PFM (high-efficiency light-load), and external sync - adapts dynamically to system power states. |
Applications
| Microcontroller Core Supply | FPGA I/O Bank Power |
|---|---|
|
Use Scenario: Providing clean, regulated 1.2V/1.8V core voltage to ARM Cortex-M or RISC-V SoCs in handheld test equipment. IC Role / Device Role / Timing Role: Primary POL regulator with tight line/load regulation (±0.8%) and fast transient response to handle CPU burst currents. Use Value: Enables reliable operation at 3A peak load while maintaining <1% output deviation - critical for deterministic real-time execution. |
Use Scenario: Delivering configurable 1.2V–3.3V I/O supply to Xilinx Artix-7 FPGA banks in modular router line cards. IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting multiple I/O standards via resistor-divider programming. Use Value: Eliminates need for discrete regulators per bank; 1MHz switching allows use of 1µH inductors fitting 0.22 in² total solution area. |
| Portable Instrument Power | Li-ion Powered Data Logger |
|
Use Scenario: Powering analog front-end (AFE), ADC, and wireless MCU in battery-operated handheld multimeters. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating across full Li-ion voltage range (4.2V → 2.7V). Use Value: 95% peak efficiency and 50µA quiescent current in PFM mode extend battery life beyond 100 hours per charge. |
Use Scenario: Supplying 3.3V system rail in environmental sensor nodes powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Regulator with UVLO (2.7V trip), soft-stop discharge, and thermal shutdown for unattended field deployment. Use Value: 100% duty-cycle operation maintains regulation until battery reaches 2.7V - maximizes usable energy per cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54332DR | 3A, 3.5–28V input, 570kHz fixed frequency, higher minimum input voltage, no PFM mode | Better suited for industrial 12V/24V intermediate bus; lacks light-load efficiency optimization for battery systems | Select when input exceeds 5.5V or when fixed-frequency EMI control is prioritized over ultra-low IQ. |
| MP2315DJ-LF-Z | 3A, 4.5–28V input, 500kHz–2.5MHz adjustable, no pre-bias startup, lower accuracy (±1.5% ref) | Cost-optimized for non-critical consumer applications; missing soft-stop discharge and negative current protection | Choose for cost-sensitive designs where 0.6V reference accuracy and safe shutdown discharge are not required. |
Compared with TPS54332DR and MP2315DJ-LF-Z, ISL8023IRTAJZ-T7 delivers superior light-load efficiency via PFM mode, guaranteed pre-biased startup, and integrated soft-stop discharge - making it uniquely suitable for portable, battery-powered instrumentation requiring high precision and safety-critical shutdown behavior.
Availability
ISL8023IRTAJZ-T7 is available at Aetrix Electronics and suitable for portable instruments, FPGA power delivery, and Li-ion battery-powered data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8023IRTAJZ-T7 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 develop high-performance analog and power management ICs for industrial, automotive, and computing markets.
The ISL8023IRTAJZ-T7 belongs to Renesas' compact synchronous buck regulator product line, designed specifically for space-constrained, battery-powered applications demanding high efficiency, low quiescent current, and robust fault protection.
FAQ
What is the maximum output current capability of the ISL8023IRTAJZ-T7?
The ISL8023IRTAJZ-T7 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 specified at 4.8A typical for 3A applications, with hiccup-mode protection engaging after 17 consecutive overcurrent events. Thermal derating applies above 85°C ambient.
Does the ISL8023IRTAJZ-T7 support adjustable output voltage?
Yes, the ISL8023IRTAJZ-T7 supports fully adjustable output voltage using an external resistor divider connected to the FB pin. With its 0.600V ±0.8% internal reference, outputs from 0.6V up to just below VIN (minus conduction losses) can be set - e.g., 1.2V (R2=100kΩ, R3=100kΩ), 1.8V (R2=200kΩ, R3=100kΩ), per Table 1 in FN7812 Rev 3.00.
How does the ISL8023IRTAJZ-T7 handle startup into a pre-biased output?
The ISL8023IRTAJZ-T7 supports pre-biased output startup by operating in SKIP mode during soft-start and disabling the high-side FET until the feedback voltage rises above 0.1V. This prevents reverse current flow and ensures controlled ramp-up even when VOUT is initially held at 1V or higher - confirmed in Figure 23 and "Soft Start-Up" section of FN7812.
What protection features are integrated into the ISL8023IRTAJZ-T7?
The ISL8023IRTAJZ-T7 integrates hiccup-mode overcurrent protection (OCP), −2.4A negative current limit, overvoltage protection (OVP), undervoltage lockout (UVLO at 2.7V), and thermal shutdown at 150°C with 25°C hysteresis. All protections are fully internal - no external components required - and PG pin asserts low during any fault condition.
Can the ISL8023IRTAJZ-T7 be synchronized to an external clock?
Yes, the ISL8023IRTAJZ-T7 supports external synchronization up to 4MHz via the SYNC pin. When driven with a clean CMOS clock signal, the device aligns its switching edges to the rising edge of the external source - enabling EMI reduction in multi-regulator systems and eliminating beat frequencies. Internal pull-down ensures safe default PWM mode if SYNC floats.
ISL8023IRTAJZ-T7 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)
ISL8023IRTAJZ-T7 FAQ
1.How can I place an order for ISL8023IRTAJZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8023IRTAJZ-T7 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-T7 reliable?
The price and inventory of ISL8023IRTAJZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8023IRTAJZ-T7 is usually 5 days.
3.What payment methods are accepted for ISL8023IRTAJZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8023IRTAJZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8023IRTAJZ-T7?
ISL8023IRTAJZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8023IRTAJZ-T7 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-T7?
For technical support, including ISL8023IRTAJZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8023IRTAJZ-T7 requirements.
6.How does Aetrix verify that ISL8023IRTAJZ-T7 is sourced from the original manufacturer or authorized distributors?
All ISL8023IRTAJZ-T7 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-T7 meets industry standards.
7.What is the process for return or replacement of ISL8023IRTAJZ-T7?
All ISL8023IRTAJZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with ISL8023IRTAJZ-T7, 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-T7 part is unused and in its original packaging.
Return procedure for ISL8023IRTAJZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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