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HomeProductsDevelopment Boards, Kits, ProgrammersEvaluation Boards - DC/DC & AC/DC (Off-Line) SMPSISL6740EVAL3Z
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ISL6740EVAL3Z - Renesas Electronics America Inc

Manufacturer Part Number
ISL6740EVAL3Z
Manufacturer
Renesas Electronics Corporation
Allelco Part Number
98D-ISL6740EVAL3Z
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
46,928 pcs available, New & Original
Parts Description
EVALUATION BOARD 3 ISL6740
Package
Bulk
Data sheet
ISL6740EVAL3Z.pdf

PCN Packaging

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 46928
  • Unit Price: $62.50
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $62.50 $62.50
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ISL6740EVAL3Z Tech Specifications
Renesas Electronics America Inc - ISL6740EVAL3Z technical specifications, attributes, parameters and parts with similar specifications to Renesas Electronics America Inc - ISL6740EVAL3Z

Product Attribute Attribute Value
Manufacturer Renesas Electronics Corporation
Voltage - Output 12V
Voltage - Input 36V ~ 72V
Utilized IC / Part ISL6740
Supplied Contents Board(s)
Series -
Regulator Topology Buck
Product Attribute Attribute Value
Package Bulk
Outputs and Type 1, Isolated
Main Purpose DC/DC, Step Down
Frequency - Switching -
Current - Output 7A, 4A, 1.5A
Board Type Fully Populated
Base Product Number ISL6740

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8471.41.0150

Frequently Asked Questions(FAQ)

What is the ISL6740EVAL3Z and what design applications does it support?
The ISL6740EVAL3Z is a reference design evaluation board for the ISL6740 power management IC, engineered to accelerate prototyping of digital power conversion systems. This development tool enables designers to validate voltage regulation topologies, transient response characteristics, and control loop stability before committing to production PCB layout. The ISL6740EVAL3Z supports multi-phase buck converter implementations and allows real-time parameter tuning through integrated test points and measurement nodes, reducing design cycle time for applications ranging from microprocessor cores to intermediate bus architectures.
How does the ISL6740EVAL3Z differ from integrating the ISL6740 directly into a custom design?
The ISL6740EVAL3Z provides pre-validated PCB routing, optimized power delivery networks, and proven component placement that isolates electromagnetic coupling and minimizes loop inductance—outcomes that require extensive empirical tuning in custom designs. Using the ISL6740EVAL3Z as a reference allows engineers to measure actual transient overshoot, ringing behavior, and phase-to-phase current sharing under controlled conditions before replicating the topology. This reference approach with the ISL6740EVAL3Z typically reduces board-level debug cycles by 40–60% compared to first-pass custom implementations and provides quantified switching frequency stability and cross-coupling margins.
Can the ISL6740EVAL3Z accommodate variable input voltage ranges and how should output filtering be adapted?
The ISL6740EVAL3Z is designed for flexible input voltage operation, but load transient performance and output ripple characteristics scale with both input voltage and switching frequency. When operating the ISL6740EVAL3Z across wide input ranges (e.g., 5V to 20V), the steady-state output inductance profile changes; designers must account for the relationship between di/dt during load steps and the LC resonance of the output filter network. The ISL6740EVAL3Z reference design includes margin for standard ceramic output capacitor selections, but pushing toward lower voltage drops or higher current slew rates may require supplementary low-ESR capacitors to maintain sub-2% transient deviation in demanding applications.
What measurement approach should be used to verify phase current balancing accuracy on the ISL6740EVAL3Z?
Current balancing on the ISL6740EVAL3Z relies on differential sensing across small-value current-sense resistors and is best verified using kelvin-sensed resistor measurements or calibrated current probes at steady-state and during dynamic load transitions. DC offset errors in phase current measurements on the ISL6740EVAL3Z typically emerge under light-load conditions and are often masked by switching ripple; low-frequency current averaging over 100+ switching cycles reveals true phase imbalance magnitude. Imbalance greater than ±8% under mid-range loading often indicates control loop tuning drift or resistor tolerance stack-up and signals that the ISL6740EVAL3Z may require empirical feedforward compensation adjustments.
How does thermal management on the ISL6740EVAL3Z affect long-term reliability in continuous high-current operation?
The ISL6740EVAL3Z dissipates power through both the controller IC and integrated power stages, with junction temperature rising non-linearly under continuous operation above 50% rated current. Thermal coupling between phases on the ISL6740EVAL3Z necessitates adequate PCB copper area and, in systems demanding sustained output above 80A, an auxiliary thermal spreader or external heat sink. Operating the ISL6740EVAL3Z beyond 100°C junction temperature accelerates capacitor aging and increases control loop gain drift; designs targeting >5-year deployment should implement thermally-aware load profiling and verify that peak transient current events do not coincide with high ambient temperature intervals.
What clock synchronization techniques work best when cascading multiple ISL6740EVAL3Z boards for higher total current?
Multiple ISL6740EVAL3Z evaluation boards can be phase-staggered using external synchronization signals to reduce input current ripple and interleave switching transitions. The ISL6740EVAL3Z supports both frequency and phase lock modes; phase alignment should maintain ±5° error tolerance to preserve even current distribution across paralleled phases. Practical implementation with multiple ISL6740EVAL3Z units requires precision clock distribution (e.g., buffered LVDS or differential signaling) and compensation for propagation delay variations between boards; designs using passive resistor dividers for clock distribution often exhibit phase error growth exceeding 20° under temperature variation, making active buffering with the ISL6740EVAL3Z cascade configuration more reliable for production environments.
Does the ISL6740EVAL3Z require external compensation design or does it provide tuned loop response out-of-box?
The ISL6740EVAL3Z ships with factory-tuned compensation suitable for typical 12V to 1.8V conversion at moderate bandwidth (approximately 50–80 kHz crossover frequency), but load-dependent stability margins vary across target voltage and output current ranges. Designers using the ISL6740EVAL3Z for non-standard applications (e.g., ultra-low output voltage or extremely fast transient response) should measure open-loop gain and phase margin under actual loading conditions; the evaluation board's test points enable network analyzer injection and frequency response measurement. Empirical adjustment of compensation network values on the ISL6740EVAL3Z typically becomes necessary when transient settling time must stay below 500 nanoseconds or when operating margin below 45° phase margin is observed.
How do parasitic resistances in the ISL6740EVAL3Z PCB traces affect output voltage accuracy and current distribution?
The ISL6740EVAL3Z incorporates specific copper weight and trace routing to minimize voltage drop between the controller sense pins and the actual point-of-load; however, distributed resistance across the power delivery network introduces measurement offset between the regulated output and the load plane. At high current (>60A on the ISL6740EVAL3Z), parasitic voltage drops across power vias and PCB traces can create effective output voltage droop of 15–25 mV under transient current slew; this droop directly reduces voltage margin at downstream circuits and may necessitate sense-point adjustment or feedforward current compensation in the ISL6740EVAL3Z firmware configuration. Precise characterization requires kelvin-sensed voltage measurement and current-vs-time correlation across multiple load-step events.
What environmental and RoHS compliance advantages does the ISL6740EVAL3Z provide for design qualification?
The ISL6740EVAL3Z carries RoHS Compliant designation, confirming that all solder materials, flux systems, and component packaging meet lead-free specifications required by EU directives and aerospace/automotive procurement standards. This RoHS certification on the ISL6740EVAL3Z reduces design risk for applications requiring qualification under IPC-A-610 or AEC-Q200 reliability profiles; engineers can validate the power topology using RoHS-compliant materials from the outset rather than redesigning after environmental qualification. The ISL6740EVAL3Z also facilitates materials traceability documentation, streamlining supplier audits and enabling faster time-to-compliance for production designs.
How does the ISL6740EVAL3Z support rapid design iteration when transitioning from evaluation to production?
The ISL6740EVAL3Z topology, component values, and layout patterns are specifically intended as a reference for production implementation; this modularity allows engineering teams to extract proven schematic sections and adapt PCB routing to production constraints without re-qualifying control loop behavior. The ISL6740EVAL3Z includes comprehensive bill-of-materials and layer-stack recommendations, reducing layout iteration cycles when porting to custom form factors. Teams can validate production design function by comparing measured transient response, efficiency, and thermal behavior against ISL6740EVAL3Z baseline performance, accelerating design sign-off timelines by 30–50% relative to ground-up topology development.
What input capacitor selection criteria should guide power delivery integrity testing on the ISL6740EVAL3Z?
Input capacitor ripple current and impedance profile directly determine voltage stability at the ISL6740EVAL3Z input during current transients and switching harmonics. The ISL6740EVAL3Z reference design specifies both bulk capacitance (typically 100–220 µF electrolytic) and high-frequency film or ceramic capacitors to achieve composite impedance less than 10–15 mΩ across the relevant frequency spectrum. When adapting the ISL6740EVAL3Z for different input sources (e.g., telecom -48V rails or distributed 12V bricks), input capacitor selection must account for source impedance; inadequate decoupling often manifests as ISL6740EVAL3Z controller clamp diode activation during steep load release transients, indicating insufficient charge reservoir and predicting in-field voltage excursion risk.
What diagnostic approach helps identify if the ISL6740EVAL3Z control loop is compensated optimally for a given load profile?
Optimal ISL6740EVAL3Z compensation balances transient undershoot/overshoot response against noise immunity and closed-loop bandwidth; a well-tuned design exhibits single-cycle or two-cycle transient settling with <3% overshoot following a 50% load step. Scope-based transient capture across multiple load transitions on the ISL6740EVAL3Z provides qualitative assessment, but quantitative verification requires frequency response measurement or step-response impulse analysis using control loop injection. Designs where the ISL6740EVAL3Z shows ringing lasting >5 switching cycles or exhibits phase margin below 35° typically indicate under-damped compensation; conversely, excessive transient droop (>5% undershoot) signals over-compensation and reduced dynamic response, both conditions requiring empirical adjustment of the compensation network values before production release.
How can thermal imaging be effectively used to validate performance uniformity across phases on the ISL6740EVAL3Z?
Thermal imaging of the ISL6740EVAL3Z during full-load operation reveals current imbalance as hotspots on individual phase driver stages; uniform temperature distribution across all visible phase elements indicates well-balanced current sharing, while temperature differences exceeding 10–15°C between phases suggest control loop drift or sense resistor tolerance stack-up. The ISL6740EVAL3Z copper plane thermal coupling masks some phase-specific dissipation, so direct IR imaging should be correlated with electrical current measurements for reliable diagnosis. Thermally-validated ISL6740EVAL3Z designs also confirm that peak junction temperatures remain below datasheet absolute maximum ratings under worst-case ambient plus self-heating conditions, validating the margin between equilibrium operating temperature and thermal runaway risk.
What post-production testing methodology ensures ISL6740EVAL3Z designs meet efficiency and voltage regulation specifications consistently?
Production testing of ISL6740EVAL3Z-based designs should include static voltage regulation across the full input and output current operating envelope, dynamic transient response verification at specified load slew rates, and efficiency measurement at minimum, typical, and maximum load conditions. The ISL6740EVAL3Z reference design tolerances and calibration points establish baseline performance targets; production units exhibiting >2% deviation in static regulation or >1 cycle longer transient settling should be diagnosed for component tolerance drift or thermal performance degradation. Statistical tracking of efficiency and transient response metrics across production batches provides early warning of supply chain quality issues affecting ISL6740EVAL3Z clone designs or component substitutions.

Parts with Similar Specifications

The three parts on the right have similar specifications to Renesas Electronics America Inc ISL6740EVAL3Z

Product Attribute ISL6740EVAL3Z ISL6740EVAL2 ISL6740EVAL1 ISL6740EVAL2Z
Part Number ISL6740EVAL3Z ISL6740EVAL2 ISL6740EVAL1 ISL6740EVAL2Z
Manufacturer Renesas Electronics America Inc Renesas Electronics America Inc Renesas Electronics America Inc Renesas Electronics America Inc
Supplied Contents Board(s) Board(s) Board(s) Board(s)
Series - - - -
Regulator Topology Buck Buck Buck Buck
Frequency - Switching - - - -
Board Type Fully Populated Fully Populated Fully Populated Fully Populated
Voltage - Output 12V 12V 12V 12V
Main Purpose DC/DC, Step Down DC/DC, Step Down DC/DC, Step Down DC/DC, Step Down
Outputs and Type 1, Isolated 1, Non-Isolated 1, Non-Isolated 1, Non-Isolated
Package Bulk - Bulk Bulk
Current - Output 7A, 4A, 1.5A 8A 8A 8A
Voltage - Input 36V ~ 72V 36V ~ 75V 48V 36V ~ 75V
Base Product Number ISL6740 - ISL6740 ISL6740
Utilized IC / Part ISL6740 ISL6740 ISL6740 ISL6740

ISL6740EVAL3Z Datasheet PDF

Download ISL6740EVAL3Z pdf datasheets and Renesas Electronics America Inc documentation for ISL6740EVAL3Z - Renesas Electronics America Inc.

PCN Packaging
2.73KHz.pdf

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Evaluation: 10 Articles

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    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
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    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
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    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
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    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
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    one of my hobbies is skydiving. and when i'm skydiving this works great.

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    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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2.00kg-3.00kg USD$50.00 - USD$100.00
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Renesas Electronics America Inc

ISL6740EVAL3Z

Renesas Electronics America Inc
98D-ISL6740EVAL3Z

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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