1 Introduction

The LM2717 is composed of two high current PWM DC/DC buck converters. The first buck (step-down) converter provides a fixed 3.3-V output at up to 1.5 A. The second buck converter provides an adjustable output at up to 2 A. The LM2717 evaluation board is designed for 3.3-V output at up to 1.5 A and 5-V output up to 2 A with an input voltage range of 8 V to 20 V. The board is ideally set up for converting a standard 12-V rail to 3.3 V and 5 V found in many applications. The 5-V output can be changed to fit other applications as desired. The LM2717 is also ideal for TFT applications with high input voltages. It can convert an 18 V to 20 V source to 3.3 V for the control circuitry and 8 V to 15 V for the panel bias voltage. This user's guide contains the schematic, layout, and bill of materials.