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Renesas ISL78233EVAL1Z
- Part No.:
- ISL78233EVAL1Z
- Manufacturer:
- Renesas
- Package:
- Datasheet:
-
ISL78233EVAL1Z.pdf
- Description:
- EVAL BOARD FOR ISL78233
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
ISL78233EVAL1Z from Renesas Electronics is an evaluation board designed to demonstrate the ISL78233 3A synchronous buck regulator in automotive point-of-load applications. It supports 2.7V–5.5V input, delivers up to 3A at adjustable output voltages (0.8V–3.3V), and operates at a default 2MHz switching frequency with internal compensation. The board features thermal-pad-based QFN mounting, 4-layer FR-4 construction, and preset 1.8V output for immediate validation.
For engineers reviewing the ISL78233EVAL1Z datasheet, ISL78233EVAL1Z pinout, ISL78233EVAL1Z application, or ISL78233EVAL1Z equivalent, this board enables rapid characterization of transient response, efficiency mapping, soft-start timing, fault recovery behavior, and external synchronization under real automotive supply conditions.
Technical Context
The ISL78233EVAL1Z implements the ISL78233ARZ 3x3mm TQFN-16 buck regulator with integrated high- and low-side MOSFETs, internal 1% reference, and 100ns minimum on-time capability. Its layout prioritizes compact power loop routing between PHASE, PGND, VIN, and VOUT nodes to minimize EMI and optimize stability.
It supports both PFM (light-load skip mode) and fixed-frequency PWM operation via SW2, includes user-adjustable soft-start (default 10ms via 33nF CSS), and allows frequency tuning from 500kHz to 4MHz using the FS pin resistor network. Compensation is preconfigured for internal mode (COMP tied to VDD), but external RC networks can be substituted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Board Type | Evaluation board for ISL78233 3A synchronous buck regulator - not a standalone IC or discrete component. |
| Input Voltage Range | 2.7V to 5.5V - matches automotive battery rail tolerance including cold-crank and load-dump transients. |
| Output Voltage | Preset to 1.8V; adjustable from 0.8V to 3.3V via R1/R2 resistor divider - supports core voltage scaling for microcontrollers and FPGAs. |
| Max Output Current | 3A continuous - validated with 0.68µH inductor rated for 13.5A saturation current and four 22µF X7R output capacitors. |
| Switching Frequency | Default 2MHz; programmable 500kHz–4MHz - balances efficiency vs. size trade-offs for space-constrained automotive modules. |
| PCB Construction | 4-layer FR-4, 2.025 × 2.725 inch, 2oz copper, 1.57mm thickness - optimized for thermal dissipation and low-inductance power delivery. |
| Soft-Start Time | Default ~10ms (via 33nF capacitor on SS pin); internally set to ~1ms when shorted to SGND - prevents inrush current during system power-up. |
Availability
ISL78233EVAL1Z is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment power rails, and body control module (BCM) point-of-load designs requiring stable component supply, fast design validation cycles, and production-representative thermal performance.
Supply support for ISL78233EVAL1Z 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications, with strong focus on functional safety and ASIL compliance.
The ISL78233EVAL1Z belongs to Renesas' ISL7823x automotive-grade buck regulator evaluation platform, engineered specifically to accelerate qualification of low-quiescent-current DC/DC converters in harsh automotive environments (–40°C to +125°C).
FAQ
What is the primary function of the ISL78233EVAL1Z?
The ISL78233EVAL1Z is a dedicated evaluation board for the ISL78233 3A synchronous buck regulator. It provides a fully assembled, tested, and characterized platform to validate electrical performance-including efficiency, transient response, thermal behavior, and fault protection-under real automotive input conditions (2.7V–5.5V). It is not a production power supply but a design enablement tool.
Does the ISL78233EVAL1Z support adjustable output voltage?
Yes, the ISL78233EVAL1Z supports output voltage adjustment from 0.8V to 3.3V using the R1/R2 resistor divider network. By default, it is configured for 1.8V output. Equation 1 in the UG015 user guide defines the relationship: R1 = R2 × (VOUT / VFB − 1), where VFB = 0.8V nominal. Resistor values are selected from standard 1% tolerances (e.g., R2 = 100kΩ, R1 ≈ 125kΩ for 1.8V).
How is switching frequency controlled on the ISL78233EVAL1Z?
Switching frequency on the ISL78233EVAL1Z is controlled via the FS pin. By default, R11 = 0Ω and R12 is open, setting fSW = 2MHz. To adjust frequency between 500kHz and 4MHz, R11 is removed and R12 is replaced per Equation 2: RT (kΩ) = 220 × 10³ / fOSC (kHz) − 14. For example, 1MHz requires R12 ≈ 206kΩ. External synchronization (1MHz–4MHz) is also supported via the SYNC pin.
What protection features can be verified using the ISL78233EVAL1Z?
The ISL78233EVAL1Z enables verification of over-temperature, overcurrent, overvoltage, and negative overcurrent protection as implemented in the ISL78233ARZ IC. Fault recovery includes automatic reset after fault condition clears - confirmed by the "reset after fault condition" note in the identity context and the 33nF CSS capacitor limit (≤33nF ensures proper soft-start reset behavior post-fault).
Can the ISL78233EVAL1Z be used to evaluate external compensation?
Yes, the ISL78233EVAL1Z supports both internal and external compensation modes. Internal compensation is enabled by tying the COMP pin to VDD (default configuration). To evaluate external compensation, disconnect COMP from VDD and populate an RC network (e.g., RCOMP = 154kΩ, CCOMP = 220pF as shown in Figure 13/14 waveforms) from COMP to GND - allowing loop stability optimization for custom output capacitance or transient requirements.
ISL78233EVAL1Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 1.8V
- Voltage - Input:
- 4A
- Regulator Topology:
- 2.7V ~ 5.5V
- Frequency - Switching:
- Buck
- Contents:
- 2MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- ISL78233
ISL78233EVAL1Z FAQ
1.How can I place an order for ISL78233EVAL1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78233EVAL1Z 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 ISL78233EVAL1Z reliable?
The price and inventory of ISL78233EVAL1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78233EVAL1Z is usually 5 days.
3.What payment methods are accepted for ISL78233EVAL1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78233EVAL1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78233EVAL1Z?
ISL78233EVAL1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78233EVAL1Z 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 ISL78233EVAL1Z?
For technical support, including ISL78233EVAL1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78233EVAL1Z requirements.
6.How does Aetrix verify that ISL78233EVAL1Z is sourced from the original manufacturer or authorized distributors?
All ISL78233EVAL1Z 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 ISL78233EVAL1Z meets industry standards.
7.What is the process for return or replacement of ISL78233EVAL1Z?
All ISL78233EVAL1Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL78233EVAL1Z, 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 ISL78233EVAL1Z part is unused and in its original packaging.
Return procedure for ISL78233EVAL1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL78233EVAL1Z Tags
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