Renesas ISL80019AEVAL1Z

Overview

ISL80019AEVAL1Z from Intersil is an evaluation board designed to demonstrate the ISL80019A 1.5A, 2MHz synchronous buck regulator in an 8-pin 2mm×2mm TDFN package. It supports input voltages from 2.7V to 5.5V, delivers regulated output down to 0.6V, and enables rapid validation of efficiency (up to 95%), PFM/PWM mode switching, and thermal performance in FPGA power and set-top box applications.

For engineers reviewing the ISL80019AEVAL1Z datasheet, ISL80019AEVAL1Z pinout, ISL80019AEVAL1Z application, or ISL80019AEVAL1Z equivalent, this board provides a ready-to-use platform for evaluating transient response, loop compensation, load regulation, and protection features-including overcurrent, thermal shutdown, and power-good signaling-under real-world PCB layout and thermal conditions.

Technical Context

The ISL80019AEVAL1Z implements the ISL80019A IC in a fixed-layout reference design with optimized component selection per Table 2 of FN7888 Rev 4.00, including 1.0–3.3µH inductor, 22µF ceramic output capacitors, and resistor divider for 1.8V output. It supports both internal (COMP tied to VIN) and external (RC network to GND) compensation configurations.

It enables direct assessment of peak current mode control behavior, 100% duty-cycle operation at 1MHz (not applicable to ISL80019A's 2MHz variant), soft-start ramp time (~1ms), and mode transition thresholds (PFM→PWM at ~675mA, PWM→PFM at ~121mA), as verified in Figures 49–50 of the datasheet.

Key Specifications

Availability

ISL80019AEVAL1Z is available at Aetrix Electronics and suitable for FPGA power, set-top box DC/DC conversion, and LCD panel supply design requiring stable component supply, fast prototyping cycles, and production-ready reference validation.

Supply support for ISL80019AEVAL1Z 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 (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications systems.

The ISL80019A product line was designed for compact, high-efficiency point-of-load regulation in space-constrained battery-powered and consumer electronics applications, emphasizing low quiescent current (35µA in PFM), small inductor compatibility, and robust protection.

FAQ

What is the primary function of the ISL80019AEVAL1Z?

The ISL80019AEVAL1Z is an evaluation board that demonstrates the ISL80019A 1.5A, 2MHz synchronous buck regulator. It provides a fully assembled, tested platform to validate electrical performance-including efficiency, transient response, mode switching, and protection behavior-without requiring custom PCB design. The ISL80019AEVAL1Z uses standard components aligned with FN7888 recommendations and supports both internal and external compensation.

Does the ISL80019AEVAL1Z support adjustable output voltage?

Yes, the ISL80019AEVAL1Z supports adjustable output voltage via the FB pin. Its default configuration uses R1 = 200kΩ and R2 = 100kΩ to set VOUT = 1.8V per Equation 1 in the datasheet, but users can replace these resistors to achieve any output from 0.6V to VIN. The feedback network directly interfaces with the ISL80019A's 0.600V ±5mV reference, enabling precise regulation across temperature and load.

Can the ISL80019AEVAL1Z be used to evaluate both PFM and PWM modes?

Yes, the ISL80019AEVAL1Z supports both PFM and PWM operation via the MODE pin. Pulling MODE to GND selects PFM for ultra-low quiescent current (35µA typical), while tying it to VIN selects PWM for consistent 2MHz switching and reduced noise. Mode transitions are observable at defined load thresholds (~121mA exit, ~675mA entry), as documented in Figures 49–50 of FN7888 Rev 4.00 for the ISL80019A device on this board.

What protection features are implemented and testable on the ISL80019AEVAL1Z?

The ISL80019AEVAL1Z enables validation of all ISL80019A protections: overcurrent (2.1–2.9A peak limit), thermal shutdown (150°C activation, 125°C hysteresis), input UVLO (2.2–2.7V), output OVP/UVP (110–120% / 80–90% of VOUT), and negative current limiting (−1.0 to −2.3A). These are accessible through PHASE, PG, and FB monitoring points, and fault responses (e.g., PG deassertion, shutdown recovery) are observable with standard lab equipment.

Is the ISL80019AEVAL1Z compatible with the ISL8002 series evaluation boards?

No, the ISL80019AEVAL1Z is not pin-compatible or functionally interchangeable with ISL8002EVAL1Z or ISL8002AEVAL1Z. While sharing the same 2mm×2mm TDFN footprint and basic topology, the ISL80019AEVAL1Z is specifically configured for the 1.5A/2MHz ISL80019A, whereas ISL8002-series boards target 2A devices with different current limits, compensation networks, and thermal derating. Component values and layout optimizations are unique to each part number.