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Renesas ISL85412DEMO1Z
- Part No.:
- ISL85412DEMO1Z
- Manufacturer:
- Renesas
- Package:
- Datasheet:
-
ISL85412DEMO1Z.pdf
- Description:
- EVAL BOARD FOR ISL85412
- Quantity:
- Payment:
- Shipping:
Inventory:2,842
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Product details
Overview
ISL85412DEMO1Z from Renesas Electronics is a demonstration board for the ISL85412 wide-input synchronous buck regulator, configured for 150mA output current and preset to 3.3V output. It operates from 3.5V to 40V input, integrates high-side/low-side NMOS FETs, and supports selectable PFM or forced PWM mode. Designed for point-of-load evaluation in industrial power supplies and embedded systems.
For engineers reviewing the ISL85412DEMO1Z datasheet, ISL85412DEMO1Z pinout, ISL85412DEMO1Z application, or ISL85412DEMO1Z equivalent, this page provides verified board-level specifications, functional configuration details, output adjustability (0.6V–15V), EN/MODE control implementation, and direct comparison with ISL85413DEMO1Z for load-current scalability.
Technical Context
The ISL85412DEMO1Z implements the ISL85412 IC in a fixed-output 3.3V configuration using external feedback resistors (R1 = 90.9kΩ, R2 = 20kΩ) and includes on-board soft-start (C9 = 330pF), power-good monitoring (PG pin), and enable logic tied to VCC via R7. The board uses a 33µH inductor (L1), 22µF output capacitor (C6), and 150µF input bulk capacitor (C10).
It supports mode selection via MODE pin: default 200kΩ pull-up enables forced PWM; grounding switches to PFM for light-load efficiency. No external compensation is required due to internal Type-II compensation, and the layout includes thermal pad (EP) connection per ISL85412's 3mm×3mm 8-lead DFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 150mA continuous - matches ISL85412 IC rating; validated for thermal stability under full load at 40VIN. |
| Input Voltage Range | 3.5V to 40V - supports wide industrial rails including 12V, 24V, and 36V systems without derating. |
| Default Output Voltage | 3.3V - factory-preset via R1/R2 feedback divider; adjustable down to 0.6V or up to 15V with resistor change. |
| Operating Mode | Selectable PFM or forced PWM - controlled by MODE pin; default pull-up ensures consistent switching frequency under all loads. |
| Soft-Start Time | ~1.5ms - set by C9 (330pF) and internal current source; prevents inrush current during power-up. |
| Power-Good Signal | Active-high PG output - asserts after VOUT reaches 90% of regulation; used for system sequencing and fault detection. |
Availability
ISL85412DEMO1Z is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system bring-up, and DC-DC converter design verification requiring stable component supply and rapid prototyping support.
Supply support for ISL85412DEMO1Z 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 manufacturer specializing in microcontrollers, analog power devices, and timing solutions, with leadership in automotive, industrial, and infrastructure markets.
The ISL85412DEMO1Z belongs to Renesas' Wide VIN Synchronous Buck Regulator demonstration platform, designed specifically to accelerate evaluation of low-quiescent-current DC-DC conversion in space-constrained, high-input-voltage applications.
FAQ
What is the primary function of the ISL85412DEMO1Z?
The ISL85412DEMO1Z is a fully assembled demonstration board for the ISL85412 synchronous buck regulator IC. Its purpose is to provide immediate hardware validation of the IC's performance-including efficiency, transient response, and mode switching-under real-world conditions. The ISL85412DEMO1Z simplifies design-in by eliminating layout risk and delivering pre-validated 3.3V/150mA output capability from 3.5V–40V input.
Can the output voltage of the ISL85412DEMO1Z be adjusted?
Yes, the ISL85412DEMO1Z output is preset to 3.3V but is adjustable from 0.6V to 15V by modifying the feedback resistor divider (R1 and R2). The board's schematic and AN1929 application note provide exact calculation methods and layout guidelines. This flexibility allows the ISL85412DEMO1Z to validate multiple rail requirements without redesigning the entire board.
How does the MODE pin operate on the ISL85412DEMO1Z?
On the ISL85412DEMO1Z, the MODE pin defaults to forced PWM operation via a 200kΩ pull-up resistor (R6) to VCC. To enable PFM mode for improved light-load efficiency, R6 must be removed and the MODE pin grounded. This hardware-selectable behavior lets users directly compare both modes using the same ISL85412DEMO1Z board without firmware changes.
Is the ISL85412DEMO1Z pin-compatible with the ISL85413DEMO1Z?
No-the ISL85412DEMO1Z and ISL85413DEMO1Z are separate boards optimized for different ICs: ISL85412 (150mA) and ISL85413 (300mA). While they share identical form factor, layout, and component placement, their current-handling components (inductor, output capacitor, MOSFETs) are rated for respective output capabilities. The ISL85412DEMO1Z is not a drop-in replacement for the ISL85413DEMO1Z in higher-current applications.
Does the ISL85412DEMO1Z include power-good and enable functionality?
Yes-the ISL85412DEMO1Z implements both functions. The EN pin is tied to VCC via R7 for always-on operation, but can be disabled by removing R7 and populating R8. The PG (power-good) signal is routed to test point P9 and asserts high when output voltage reaches 90% of target-enabling system-level sequencing and fault monitoring in designs using the ISL85412DEMO1Z as a reference.
ISL85412DEMO1Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 3.3V
- Voltage - Input:
- 150mA
- Regulator Topology:
- 3.5V ~ 40V
- Frequency - Switching:
- Buck
- Contents:
- 700kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- ISL85412
ISL85412DEMO1Z FAQ
1.How can I place an order for ISL85412DEMO1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85412DEMO1Z 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 ISL85412DEMO1Z reliable?
The price and inventory of ISL85412DEMO1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85412DEMO1Z is usually 5 days.
3.What payment methods are accepted for ISL85412DEMO1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85412DEMO1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85412DEMO1Z?
ISL85412DEMO1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85412DEMO1Z 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 ISL85412DEMO1Z?
For technical support, including ISL85412DEMO1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85412DEMO1Z requirements.
6.How does Aetrix verify that ISL85412DEMO1Z is sourced from the original manufacturer or authorized distributors?
All ISL85412DEMO1Z 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 ISL85412DEMO1Z meets industry standards.
7.What is the process for return or replacement of ISL85412DEMO1Z?
All ISL85412DEMO1Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL85412DEMO1Z, 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 ISL85412DEMO1Z part is unused and in its original packaging.
Return procedure for ISL85412DEMO1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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