Renesas ISL8510EVAL1Z

Overview

ISL8510EVAL1Z from Intersil is an evaluation board for the ISL8510 triple-output power management IC, implementing a 1A synchronous buck regulator with integrated MOSFETs and a 500mA adjustable LDO. It supports input voltages from 6V to 25V (or fixed 5V), delivers PWM output from 0.6V to 20V, and features dual PGOOD indicators, thermal/overcurrent protection, and external soft-start control - used for validating point-of-load power designs in WLAN cards and handheld instruments.

For engineers reviewing the ISL8510EVAL1Z datasheet, ISL8510EVAL1Z pinout, ISL8510EVAL1Z application, or ISL8510EVAL1Z equivalent, this board enables rapid characterization of the ISL8510's buck + LDO performance, feedback loop stability, load transient response, and fault behavior under real-world bias and load conditions.

Technical Context

The ISL8510EVAL1Z implements the ISL8510 IC in a fully assembled, tested layout with preconfigured 3.3V (VOUT1), 1.2V (VOUT2), and 1.8V outputs using resistor-divider feedback networks. It integrates discrete components including a 100µH power inductor (L1), Schottky diode (D1), 22µF/6.3V output capacitors (C15), and 10µF/25V input capacitor (C11), all selected per Intersil's AN1332 design guidelines.

Board-level features include dual enable switches (SW1 for buck, SW2 for LDO1), test points (TP1–TP17) for VIN, VOUT1, VOUT2, PG_PWM, PG_LDO, FB_PWM, and FB_LDO1, plus onboard LEDs indicating power-good status - enabling direct oscilloscope probing and load-step testing without soldering or component substitution.

Key Specifications

Availability

ISL8510EVAL1Z is available at Aetrix Electronics and suitable for WLAN card development, handheld instrument prototyping, and compact flash power subsystem validation requiring stable component supply and documented reference design fidelity.

Supply support for ISL8510EVAL1Z 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-efficiency DC-DC solutions and precision analog interfaces.

The ISL8510EVAL1Z belongs to Intersil's evaluation kit product line, engineered specifically to accelerate design-in of the ISL8510 triple-output power controller in space-constrained, multi-rail applications such as PCMCIA and MiniPCI systems.

FAQ

What is the primary function of the ISL8510EVAL1Z?

The ISL8510EVAL1Z is an evaluation board designed to demonstrate and validate the ISL8510 triple-output power management IC. It provides a ready-to-test platform for the 1A buck regulator and 500mA LDO, with preconfigured outputs (3.3V, 1.2V, 1.8V), test points, enable switches, and PGOOD indicators - allowing engineers to verify regulation accuracy, transient response, and protection behavior without custom PCB design. The ISL8510EVAL1Z directly supports development of compact, multi-rail power systems.

Does the ISL8510EVAL1Z support adjustable output voltages?

Yes, the ISL8510EVAL1Z supports full adjustment of all three outputs using external resistor dividers per Equation 1 in AN1332. The board ships with preset values (R1 = 20kΩ, R2 = 10kΩ for VOUT1 = 3.3V), but users can replace R1/R2 to program any PWM output from 0.6V to 20V and LDO1 from 0.6V to 4.2V. The ISL8510EVAL1Z schematic and component list confirm footprint compatibility for 0402/0603 resistors at all feedback nodes.

What power supply requirements are needed to operate the ISL8510EVAL1Z?

The ISL8510EVAL1Z requires a 0–25V DC supply capable of delivering ≥5A peak current, as specified in AN1332 Section "Recommended Equipment". Input must be applied to TP1 (VCC) and TP6 (GND), with SW1 set to ENABLE before power-on. For LDO1 operation, VLDO1 must be powered separately unless R25 is removed - the ISL8510EVAL1Z design accommodates both self-powered and externally biased LDO configurations.

How are the power-good signals implemented on the ISL8510EVAL1Z?

The ISL8510EVAL1Z routes PG_PWM and PG_LDO signals to onboard red LEDs (D3 and D4) for immediate visual status indication. These signals originate directly from the ISL8510IC's open-drain outputs and are pulled up via 10kΩ resistors (R21, R24). When regulation is valid, the LED illuminates; loss of regulation pulls the signal low, extinguishing the LED - providing real-time fault detection without instrumentation. This behavior is verified in the ISL8510EVAL1Z Quick Setup Guide.

Can the ISL8510EVAL1Z be used to evaluate thermal performance?

Yes, the ISL8510EVAL1Z includes thermal vias and copper pour optimized per AN1332 layout guidelines to replicate the ISL8510IRZ QFN package's thermal dissipation path. Test points TP13 and TP16 allow direct thermocouple attachment to the IC pad (EP) and nearby ground plane. Under 1A buck load at 25V input, the ISL8510EVAL1Z achieves ≤45°C junction rise - confirming the ISL8510's thermal overload protection activation threshold and steady-state thermal design margin.