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Renesas ISL85403EVAL2Z
- Part No.:
- ISL85403EVAL2Z
- Manufacturer:
- Renesas
- Package:
- Datasheet:
-
ISL85403EVAL2Z.pdf
- Description:
- EVAL BOARD FOR ISL85403
- Quantity:
- Payment:
- Shipping:
Inventory:3,813
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Product details
Overview
ISL85403EVAL2Z from Renesas Electronics is an evaluation board designed to demonstrate the ISL85403 synchronous buck-boost regulator in noninverting configuration, supporting 8V–40V input and delivering a fixed 12V/1A output at 500kHz switching frequency with 360mV output ripple under full load. It enables rapid validation of wide-input, low-power point-of-load designs requiring both step-up and step-down capability.
For engineers reviewing the ISL85403EVAL2Z datasheet, ISL85403EVAL2Z pinout, ISL85403EVAL2Z application, or ISL85403EVAL2Z equivalent, this board provides hands-on verification of ISL85403 operation in noninverting buck-boost topology, including frequency programming via R1, external clock synchronization via J5, and output voltage adjustment through feedback resistors R11/R13.
Technical Context
The ISL85403EVAL2Z implements the ISL85403 IC in a noninverting buck-boost converter topology using a single inductor (18µH), integrated 127mΩ high-side MOSFET, and external Schottky diodes (D1/D2). Input voltage range is strictly 8V–40V, and output is regulated to 12V by a resistor divider (R11 = 28kΩ, R13 = 2kΩ) referencing the ISL85403's 0.6V internal VREF.
Switching frequency defaults to 500kHz with FS pin open, but is programmable via resistor R1 or synchronized externally via the SYNC terminal (J5). The board includes layout-optimized power loops, thermal vias under U1's exposed pad, and decoupling per Renesas' recommended practices for the ISL85403IRZ QFN-20 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8V to 40V - supports industrial and automotive auxiliary rails without pre-regulation. |
| Output Voltage | 12.0V fixed - set by R11/R13 feedback network; adjustable via resistor change per Equation 1. |
| Max Output Current | 1A continuous - validated with thermal design using Würth 744770118 inductor and Infineon BSZ100N06LS3G MOSFET. |
| Switching Frequency | 500kHz default - enables compact magnetics; programmable via R1 or synchronizable via J5 SYNC input. |
| Output Ripple | 360mV peak-to-peak at 1A load - measured across C12 (330µF tantalum) and ceramic output caps. |
| Topology | Noninverting buck-boost - allows VIN < VOUT and VIN > VOUT operation with single inductor and no polarity inversion. |
Availability
ISL85403EVAL2Z is available at Aetrix Electronics and suitable for industrial power supply validation, automotive body electronics testing, and embedded system prototyping requiring stable component supply and fast time-to-evaluation.
Supply support for ISL85403EVAL2Z 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, infrastructure, and IoT applications.
The ISL85403EVAL2Z belongs to Renesas' power management evaluation platform family, engineered specifically to accelerate adoption of the ISL85403 flexible buck-boost regulator in wide-input, low-power point-of-load systems.
FAQ
What is the primary function of the ISL85403EVAL2Z?
The ISL85403EVAL2Z is an evaluation board that demonstrates the ISL85403 synchronous buck-boost regulator operating in noninverting configuration. It delivers a regulated 12V output from an 8V–40V input, enabling engineers to validate performance metrics-including efficiency, load transient response, and ripple-before integrating the ISL85403 into final designs.
Can the output voltage of the ISL85403EVAL2Z be adjusted?
Yes, the ISL85403EVAL2Z output voltage can be adjusted by changing the feedback resistor divider (R11 and R13) per Equation 1 in the user guide: VOUT = VREF × (1 + R11/R13), where VREF = 0.6V. Increasing VOUT requires higher-voltage-rated output capacitors, such as replacing C12 if exceeding 16V rating.
How is the switching frequency configured on the ISL85403EVAL2Z?
The ISL85403EVAL2Z defaults to 500kHz with the FS pin open (R1 unpopulated). Frequency can be adjusted by populating R1 with a resistor per the ISL85403 datasheet's FS vs. R1 table, or synchronized to an external clock source connected to the SYNC terminal (J5).
What components define the power stage of the ISL85403EVAL2Z?
The ISL85403EVAL2Z power stage centers on the ISL85403IRZ QFN-20 IC (U1), paired with Infineon BSZ100N06LS3G N-channel MOSFET (Q1), dual Vishay SS6P3LHM3/86A Schottky diodes (D1/D2), and Würth 744770118 18µH power inductor (L1). Output filtering uses KEMET T521X337M016ATE025 (330µF/16V) and multiple ceramic capacitors.
Does the ISL85403EVAL2Z support load transients and soft-start verification?
Yes, the ISL85403EVAL2Z supports full characterization of dynamic behavior: Figures 10–15 in UG010 show load transient response (0A ↔ 1A) and soft-start waveforms across input voltages (8V and 36V), confirming stable regulation and controlled startup under varying line and load conditions-key for validating ISL85403EVAL2Z in real-world applications.
ISL85403EVAL2Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Up or Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 12V
- Voltage - Input:
- 1A
- Regulator Topology:
- 8V ~ 40V
- Frequency - Switching:
- Buck-Boost
- Contents:
- 500kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- ISL85403
ISL85403EVAL2Z FAQ
1.How can I place an order for ISL85403EVAL2Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85403EVAL2Z 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 ISL85403EVAL2Z reliable?
The price and inventory of ISL85403EVAL2Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85403EVAL2Z is usually 5 days.
3.What payment methods are accepted for ISL85403EVAL2Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85403EVAL2Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85403EVAL2Z?
ISL85403EVAL2Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85403EVAL2Z 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 ISL85403EVAL2Z?
For technical support, including ISL85403EVAL2Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85403EVAL2Z requirements.
6.How does Aetrix verify that ISL85403EVAL2Z is sourced from the original manufacturer or authorized distributors?
All ISL85403EVAL2Z 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 ISL85403EVAL2Z meets industry standards.
7.What is the process for return or replacement of ISL85403EVAL2Z?
All ISL85403EVAL2Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL85403EVAL2Z, 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 ISL85403EVAL2Z part is unused and in its original packaging.
Return procedure for ISL85403EVAL2Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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