Renesas ISL8002BDEMO1Z

Overview

ISL8002BDEMO1Z from Renesas Electronics is a 2A demonstration board designed to evaluate the ISL8002B synchronous step-down DC/DC converter in point-of-load applications with input voltage range 2.7V–5.5V, fixed 1.8V output, 2MHz switching frequency, and selectable PFM/PWM operation mode.

For engineers reviewing the ISL8002BDEMO1Z datasheet, ISL8002BDEMO1Z pinout, ISL8002BDEMO1Z application, or ISL8002BDEMO1Z equivalent, this board enables rapid validation of soft-start programming, output tracking/sequencing, thermal protection behavior, and efficiency up to 95% at full 2A load under real PCB layout constraints.

Technical Context

The ISL8002BDEMO1Z implements a peak current mode controlled buck topology using the ISL8002B IC in an 8-pin 2mm×2mm TDFN package. It supports external soft-start via SS/TR pin capacitance (up to 1μF) and configurable output tracking through resistor dividers on the same pin.

Board-level design enforces critical power loop minimization: short wide traces between PHASE, PGND, VIN, and output capacitor; dedicated thermal vias under the IC's EP pad; and strict separation of feedback routing from noisy switching nodes to ensure stable regulation and low EMI.

Key Specifications

Availability

ISL8002BDEMO1Z is available at Aetrix Electronics and suitable for point-of-load power evaluation, DC/DC converter reference design validation, and embedded system power architecture prototyping requiring stable component supply and documented performance curves.

Supply support for ISL8002BDEMO1Z 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 connectivity solutions for automotive, industrial, and enterprise applications.

The ISL8002BDEMO1Z belongs to Renesas' precision DC/DC evaluation platform family, engineered specifically to accelerate adoption of low-quiescent-current, high-efficiency buck regulators in space-constrained and thermally demanding point-of-load designs.

FAQ

What is the primary function of the ISL8002BDEMO1Z?

The ISL8002BDEMO1Z is a fully assembled demonstration board used to evaluate the electrical performance, thermal behavior, and feature set of the ISL8002B 2A synchronous buck converter. It provides test points, pre-populated components, and validated layout for immediate bench testing of startup, load transient response, efficiency, and protection functions - all without requiring custom PCB design.

Can the ISL8002BDEMO1Z be used to generate output voltages other than 1.8V?

Yes - while the ISL8002BDEMO1Z is factory-configured for 1.8V output, the underlying ISL8002B supports adjustable VOUT from 0.6V to 80% of VIN via the FB pin. Users can modify the R1/R2 feedback divider (U1 pins 4 and 5) to set alternate output voltages; the board's silk screen and schematic provide reference values for common configurations including 1.2V and 3.3V.

How does the ISL8002BDEMO1Z implement output voltage tracking and sequencing?

The ISL8002BDEMO1Z uses the SS/TR pin (U1 pin 3) to enable coincidental, sequential, or ratiometric tracking. With R3 and R4 populated as a resistor divider, it tracks another supply's ramp rate; connecting SS/TR to VIN enables internal 1ms soft-start. Figures 11–16 in the UG008 user guide show verified waveforms for all three modes using the ISL8002BDEMO1Z hardware.

What are the key layout features of the ISL8002BDEMO1Z that support reliable 2A operation?

The ISL8002BDEMO1Z incorporates a 4-layer PCB with optimized power delivery: minimal loop area between PHASE, PGND, and output capacitors; thermal vias under the IC's exposed pad (EP); solid ground plane on L2; and separated analog (FB, SS/TR) and power (VIN, PHASE, VO) routing. These features collectively maintain <5°C junction rise at 2A/5V input and suppress conducted EMI per CISPR-22 Class B limits.

Does the ISL8002BDEMO1Z include provisions for measuring efficiency and thermal performance?

Yes - the ISL8002BDEMO1Z provides dedicated test points: TP1 (VIN), TP2 (PGND), TP3 (VO), TP4 (PGND return), and TP5 (EN). Combined with the onboard 1.2µH inductor and four parallel 22µF output capacitors, these allow direct measurement of input/output voltage, current (via shunt or clamp meter), and temperature rise using IR imaging or thermocouples placed near U1's thermal pad and L1 body.