ACE727C

600KHz, 16V, 2A Synchronous Step-Down Converter

VER 1.2

5

APPLICATIONS INFORMATION

Setting Output Voltages

The external resistor divider is used to set the output voltage (see Typical Application on page 1). The

feedback resistor R1 also sets the feedback loop bandwidth with the internal compensation capacitor.

Choose R1 to be around 100k

Ω for optimal transient response. R2 is then given by:

Selecting the Inductor

A 4.7μH to 22μH inductor with a DC current rating of at least 25% percent higher than the maximum load

current is recommended for most applications. For highest efficiency, the inductor DC resistance should

be less than 15mΩ. For most designs, the inductance value can be derived from the following equation.

Where ΔIL is the inductor ripple current. Choose inductor ripple current to be approximately 30% if the

maximum load current, 2A. The maximum inductor peak current is:

Under light load conditions below 100mA, larger inductance is recommended for improved efficiency.