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Renesas ISL78233AARZ-T7A
- Part No.:
- ISL78233AARZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL78233AARZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 3A 16WFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:485
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Product details
Overview
ISL78233AARZ-T7A from Renesas Electronics is a monolithic synchronous buck regulator delivering up to 3A continuous output current from a 2.7V–5.5V input, featuring integrated 35mΩ P-channel and 11mΩ N-channel MOSFETs, 2MHz default switching frequency, and AEC-Q100 qualification for automotive infotainment power rails.
For engineers reviewing the ISL78233AARZ-T7A datasheet, ISL78233AARZ-T7A pinout, ISL78233AARZ-T7A application, or ISL78233AARZ-T7A equivalent, key selection criteria include its 3A output capability, 100% duty-cycle operation enabling <200mV dropout at full load, adjustable 500kHz–4MHz frequency, internal/external compensation flexibility, and -40°C to +125°C junction temperature rating.
Technical Context
The ISL78233AARZ-T7A employs current-mode PWM control with slope compensation (440mV/Ts) and pulse-by-pulse current limiting, ensuring fast transient response and loop stability across 500kHz–4MHz operation. Its dual-MOSFET architecture integrates a low-RDS(on) high-side P-FET (35mΩ typ.) and low-side N-FET (11mΩ typ.) to maximize efficiency-up to 95% at 2MHz-and minimize external component count.
It supports both forced continuous conduction mode (reducing EMI) and discontinuous mode (improving light-load efficiency), with hiccup-mode overcurrent protection, thermal shutdown at 150°C, and a 1ms power-good delay. The device uses a 0.6V reference with ±1.2% accuracy over line/load/temperature and includes soft-start (1ms fixed or adjustable) and soft-stop output discharge during disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports μC/FPGA core rail requirements without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), automotive 3.3V/5V domains, and post-regulated supplies. |
| Switching Frequency | Adjustable 500kHz–4MHz; default 2MHz - enables compact magnetics and noise-sensitive layout optimization. |
| Efficiency | Up to 95% at 2MHz - reduces thermal load in space-constrained automotive modules. |
| Reference Accuracy | ±1.2% over temperature/load/line - ensures stable 1.2V–3.3V output regulation for precision logic rails. |
| Thermal Rating | -40°C to +125°C junction - qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications. |
| Package | 5mm×5mm 16-lead Wettable Flank QFN (WFQFN) - improves solder joint inspection and thermal dissipation via exposed pad. |
Pinout & Package
ISL78233AARZ-T7A is housed in a RoHS-compliant 5mm×5mm 16-lead Wettable Flank Quad Flat No-Lead (WFQFN) package with an exposed thermal pad connected to SGND. The package supports automated optical inspection (AOI) and delivers θJA = 33°C/W in standard PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,16) | Input power supply | Accepts 2.7–5.5V; requires ≥2×22µF ceramic decoupling close to pins for stability. |
| PHASE (Pins 13–15) | Switching node | Connects to inductor; internally discharged via 100Ω resistor during shutdown to prevent output ringing. |
| PGND (Pins 11,12) | Power ground return | Separate low-impedance path for high-current switch node return; must be tied to SGND only at single point. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN; connects to exposed pad for optimal noise immunity and thermal performance. |
| FB (Pin 9) | Feedback input | Monitors output voltage via resistor divider; sets VOUT = 0.6V × (1 + R2/R3); used for PG and UV/OV detection. |
| COMP (Pin 8) | Error amplifier output | Supports internal compensation (tie to VDD) or external network (R/C to SGND) for loop tuning flexibility. |
| EN (Pin 5) | Enable control | Active-high logic input; pulls output capacitor to ground via internal soft-stop switch when disabled. |
| FS (Pin 6) | Frequency set | Resistor-to-SGND sets fSW from 500kHz–4MHz; tie to VIN for default 2MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 35mΩ P-ch HS + 11mΩ N-ch LS MOSFETs reduce BOM count and improve efficiency vs discrete solutions. |
| 100% Duty-Cycle Operation | Enables <200mV dropout at 3A - critical for maintaining regulation during cold-crank or brownout conditions. |
| Configurable Light-Load Mode | Selectable PFM (high efficiency) or forced CCM (low noise) via SYNC pin - adapts to system EMI and battery-life priorities. |
| Robust Fault Protection | Hiccup-mode OCP, thermal shutdown (150°C), OV/UV lockout, and negative current limit protect against short circuits and abnormal loads. |
| Automotive-Ready Qualification | AEC-Q100 Grade 1 qualified with 5kV HBM ESD rating - validated for harsh automotive environments. |
Applications
| Automotive Infotainment Power | μC/FPGA Core Rail |
|---|---|
Use Scenario: Powering SoC-based head units with dynamic load profiles and strict EMI limits. IC Role / Device Role / Timing Role: Primary POL buck regulator delivering 1.2V/1.8V/3.3V to processor cores and peripherals. Use Value: 2MHz switching enables small 1µH inductors; PFM mode extends battery runtime during standby. | Use Scenario: Supplying configurable logic and memory interfaces in ADAS domain controllers. IC Role / Device Role / Timing Role: High-efficiency step-down converter with fast transient response for burst-mode processing loads. Use Value: Current-mode control and 1ms PG delay ensure reliable startup sequencing and rail monitoring. |
| Li-ion Battery-Powered Devices | Video Processor Power |
Use Scenario: Regulating output from single-cell Li-ion (3.0–4.2V) to 1.5V/1.8V for portable displays. IC Role / Device Role / Timing Role: Synchronous buck converter with ultra-low quiescent current (45µA) in PFM mode. Use Value: Discontinuous mode minimizes switching losses at light loads, extending battery life by >15% vs fixed-frequency alternatives. | Use Scenario: Delivering clean, stable 1.2V/2.5V rails to video codecs and image signal processors. IC Role / Device Role / Timing Role: Low-noise POL regulator with soft-start and output discharge for glitch-free video initialization. Use Value: Internal soft-stop discharges output cap on disable, preventing back-powering of downstream circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4433AGL-A-Z | 3.5A rated, 2.5–6V input, 500kHz–3MHz freq, no wettable flank package | Lacks AEC-Q100 qualification; suitable for industrial but not automotive-grade designs | Choose for cost-sensitive non-automotive systems where thermal pad inspection is not required. |
| TPS543320RHLT | 3A rated, 3–18V input, 400kHz–2.2MHz freq, integrated PMBus telemetry | Wider VIN range and digital interface add complexity; higher BOM cost and footprint | Choose when remote monitoring, programmable margins, or wide-input flexibility outweigh analog simplicity. |
Compared with MPQ4433AGL-A-Z and TPS543320RHLT, the ISL78233AARZ-T7A offers AEC-Q100 compliance, wettable flank packaging for enhanced reliability, and optimized 2.7–5.5V operation ideal for automotive battery-derived rails - making it the preferred choice for infotainment and ADAS power stages where qualification and manufacturability are mandatory.
Availability
ISL78233AARZ-T7A is available at Aetrix Electronics and suitable for automotive infotainment power, μC/FPGA core rail generation, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for ISL78233AARZ-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 is a global semiconductor leader specializing in microcontrollers, analog power, and automotive ICs, with deep expertise in high-reliability power management solutions.
The ISL78233AARZ-T7A belongs to Renesas' ISL7823x automotive buck regulator family, designed specifically for demanding automotive subsystems including infotainment, ADAS, and body electronics where AEC-Q100 qualification, thermal robustness, and compact size are essential.
FAQ
What is the maximum continuous output current supported by the ISL78233AARZ-T7A?
The ISL78233AARZ-T7A supports up to 3A of continuous output current across its full operating temperature range (-40°C to +125°C). This rating is confirmed in the datasheet's Recommended Operating Conditions table and applies with proper thermal design using the 5mm×5mm WFQFN package's exposed pad tied to SGND. Derating may be required above +85°C ambient depending on PCB copper area and airflow.
Does the ISL78233AARZ-T7A require external compensation components?
The ISL78233AARZ-T7A supports both internal and external compensation. When COMP is tied to VDD, internal compensation is enabled - sufficient for typical 1.2V–3.3V outputs with standard 1µH inductors and 44µF output capacitance. For optimized transient response or non-standard configurations, external R/C networks between COMP and SGND are recommended, as detailed in the Loop Compensation Design section of the FN8359 datasheet.
How does the ISL78233AARZ-T7A handle output capacitor discharge during shutdown?
The ISL78233AARZ-T7A features an internal soft-stop switch that actively discharges the output capacitor through a controlled path when EN is pulled low. This prevents back-powering of downstream circuitry and ensures safe, glitch-free power sequencing. The discharge rate is designed to avoid excessive inrush during subsequent startup and is independent of external components.
Can the ISL78233AARZ-T7A operate with 100% duty cycle, and what is its practical benefit?
Yes, the ISL78233AARZ-T7A supports true 100% duty-cycle operation, enabling output voltages approaching the input rail minus conduction losses. At 3A load, this results in <200mV dropout - critical for maintaining regulation during automotive cold-crank events (e.g., 6V battery sag) or low-VIN conditions where other buck regulators would drop out of regulation.
What package type and thermal characteristics define the ISL78233AARZ-T7A?
The ISL78233AARZ-T7A uses a 5mm×5mm 16-lead Wettable Flank QFN (WFQFN) package with an exposed thermal pad. Its thermal resistance is θJA = 33°C/W and θJC = 3.5°C/W, significantly lower than the 3mm×3mm TQFN variant. This enables higher power density and improved reliability in thermally constrained automotive modules when the exposed pad is properly connected to SGND via multiple vias.
ISL78233AARZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN 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:
- 420kHz ~ 4.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WFQFN (5x5)
ISL78233AARZ-T7A FAQ
1.How can I place an order for ISL78233AARZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78233AARZ-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 ISL78233AARZ-T7A reliable?
The price and inventory of ISL78233AARZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78233AARZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL78233AARZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78233AARZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78233AARZ-T7A?
ISL78233AARZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78233AARZ-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 ISL78233AARZ-T7A?
For technical support, including ISL78233AARZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78233AARZ-T7A requirements.
6.How does Aetrix verify that ISL78233AARZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL78233AARZ-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 ISL78233AARZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL78233AARZ-T7A?
All ISL78233AARZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL78233AARZ-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 ISL78233AARZ-T7A part is unused and in its original packaging.
Return procedure for ISL78233AARZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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