Highly-Integrated Buck-Boost Switching Regulator Evaluation Boards


The ISL91108IIA-EVZ and ISL91108IIN-EVZ evaluation platforms allow for quick evaluation of the ISL91108 highly-integrated buck-boost switching regulator that accepts input voltages either above or below the regulated output voltage. Unlike other buck-boost regulators, this regulator automatically transitions between operating modes without significant output disturbance. The ISL91108 is designed for standalone applications and supports a 3.3V fixed output voltage or variable output voltages with an external resistor divider. Output voltages as low as 1V or as high as 5.2V are supported using an external resistor divider.

Key Features

  • ISL91108 high-efficiency buck-boost regulator
  • Input voltage rating from 1.8V to 5.5V
  • Resistor programmable output voltage on the ISL91108IIA-EVZ evaluation board
  • Fixed 3.3V output voltage on the ISL91108IIN-EVZ evaluation board
  • Up to 1.5A output current (PVIN = 3.0V, VOUT = 3.3V)
  • 2.5MHz switching frequency
  • Jumper selectable EN (enabled/disabled)
  • Jumper selectable mode (auto-PFM/forced-PWM)
  • Connectors, testpoints and jumpers for easy evaluation


  • Smartphones
  • Tablet PCs

ISL91108IIN-EVZ Buck-Boost Switching Regulator Evaluation Board

ISL91108IIN-EVZ Evaluation Board

Related Products


Tool Information

Tools Orderable Part Number (s) Production Status Manufacturer Suggested Single Tool Price
Description Distributor Stock Distributors Distributor Purchase Buy Direct
ISL91108IIN-EVZ Mass Production Renesas $62.67 1 3 Farnell -
3 Mouser
ISL91108IIA-EVZ Mass Production Renesas $333.33 1 0 Call -

Note: Distributor Prices may vary from the stated budgetary price. The pricing and availability information on this site is based on information provided by Renesas’ authorized distributors and is subject to change without notice. By selecting a distributor from this page, you will be redirected from the Renesas site to the distributor’s website to complete a purchase. The distributors are independent from Renesas and maintain their own terms and conditions of sale. Renesas disclaims all representations and warranties, express and implied, with respect to transactions between distributors and their end customers.

Disclaimer: THIS MATERIAL IS PROVIDED “AS-IS” FOR EVALUATION PURPOSES ONLY. RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (collectively, “Renesas”) DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY. Renesas provides evaluation platforms and design proposals to help our customers to develop products. However, factors beyond Renesas' control, including without limitation, component variations, temperature changes and PCB layout, could significantly affect the product performance. It is the user’s responsibility to verify the actual circuit performance.