Renesas ISL97519AIUZEVALZ

Overview

ISL97519AIUZEVALZ from Intersil is an evaluation board for the ISL97519A 600kHz/1.2MHz PWM step-up regulator IC, designed to demonstrate high-efficiency boost conversion in portable TFT-LCD power supplies. It supports input voltages from 2.3V to 5.5V, delivers up to 1A output current with >90% efficiency, and features selectable switching frequencies (620kHz or 1.25MHz), adjustable soft-start, and internal 2.0A/200mΩ MOSFET for compact DC-DC design.

For engineers reviewing the ISL97519AIUZEVALZ datasheet, ISL97519AIUZEVALZ pinout, ISL97519AIUZEVALZ application, or ISL97519AIUZEVALZ equivalent, this evaluation platform enables rapid validation of boost converter performance, compensation network tuning, transient response characterization, and thermal behavior under real-world load conditions across -40°C to +85°C ambient.

Technical Context

The ISL97519AIUZEVALZ implements a current-mode controlled boost topology using the ISL97519A IC, which integrates a 2.0A/200mΩ N-channel MOSFET and operates at either 620kHz or 1.25MHz via FSEL pin configuration. Its external compensation network (COMP pin) allows precise loop stability tuning for ceramic output capacitors, while soft-start (SS pin) controls inrush current via programmable capacitor timing.

It supports wide-input operation (2.3V–5.5V), generates regulated outputs from 1.1×VIN up to 25V, and incorporates thermal shutdown, VDD UVLO (2.1V on-threshold with 140mV hysteresis), and <1µA shutdown current - all optimized for space-constrained, battery-powered applications like handheld displays and DSL modems.

Key Specifications

Availability

ISL97519AIUZEVALZ is available at Aetrix Electronics and suitable for TFT-LCD display power design, DSL modem DC-DC conversion, and portable digital camera power management requiring stable component supply, quick-turn prototyping, and production-ready reference validation.

Supply support for ISL97519AIUZEVALZ 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-performance DC-DC converters, precision amplifiers, and interface solutions targeting portable, industrial, and communications systems.

The ISL97519A product line was engineered specifically for high-efficiency, low-profile boost regulation in space-sensitive portable electronics - emphasizing minimal external components, robust thermal performance in MSOP packaging, and seamless integration into TFT-LCD and handheld device power trees.

FAQ

What is the primary function of the ISL97519AIUZEVALZ?

The ISL97519AIUZEVALZ is an evaluation board designed to demonstrate and validate the performance of the ISL97519A high-frequency PWM step-up regulator IC. It provides a fully assembled, tested platform with standard input/output connections, test points, and layout optimized for measuring efficiency, transient response, loop stability, and thermal behavior - enabling engineers to accelerate development of boost-based power supplies without custom PCB design.

Does the ISL97519AIUZEVALZ include the ISL97519A IC?

Yes, the ISL97519AIUZEVALZ includes one ISL97519A IC mounted in its native 8-lead MSOP package (M8.118A). The board is pre-configured with default component values - including 10µH inductor, 22µF output capacitors, 0.1µF bypass capacitor on VDD, and resistor divider for 12V output - allowing immediate functional testing upon applying input voltage and enabling the EN pin.

Can the ISL97519AIUZEVALZ be used to evaluate different output voltages?

Yes, the ISL97519AIUZEVALZ supports adjustable output voltage via the FB pin's external resistor divider. By replacing R1 and R2 per Equation 4 (VOUT = 1.24V × (1 + R1/R2)), users can configure outputs from ~5V up to 25V. The board includes solder pads and test points for easy rework, and the ISL97519A's 1.24V reference tolerance (±1.7%) ensures accurate regulation across the full range when properly compensated.

How is switching frequency selected on the ISL97519AIUZEVALZ?

Switching frequency on the ISL97519AIUZEVALZ is selected by configuring the FSEL pin: grounding FSEL sets 620kHz operation, while connecting it to VDD selects 1.25MHz. The evaluation board includes a jumper or solder bridge option to implement either configuration, allowing direct comparison of inductor size, efficiency curves, and transient response between the two modes as documented in Figures 1–4 of the FN6683 datasheet.

What thermal performance can be expected from the ISL97519AIUZEVALZ during full-load operation?

Under continuous 1A output at 12V with 3.3V input and 1.25MHz switching, the ISL97519AIUZEVALZ achieves >88% efficiency (per Figure 2), resulting in ~1.4W dissipation. With the ISL97519A's MSOP-8 package (θJA = 115°C/W on high-conductivity board), junction temperature rise is ~160°C above ambient - well within the 135°C max rating only if ambient stays below ~−25°C. Real-world use requires derating or airflow; the board's layout supports optional heatsinking on the LX/GND copper pour.