1 Introduction

The LM3477 is a current mode, high-side N channel FET controller. It is most commonly used in buck configurations, as shown in Figure 1-1. All the power conducting components of the circuit are external to the LM3477, so a large variety of inputs, outputs, and loads can be accommodated by the LM3477.

The LM3477 evaluation board comes ready to operate at the following conditions:

• 4.5 V ≤ V_IN ≤ 15 V
• V_OUT = 3.3 V
• 0 A ≤ I_OUT ≤ 1.6 A

The circuit and BOM for this application are given in Figure 1-1 and Table 1-1.