To start the procedure, the total resistance, including the power switch rDS(on) and wire resistance R(WIRE), must be known.
- Choose R(G) following the voltage-regulator feedback resistor-divider design guideline.
- Calculate R(FA) according to Equation 1.
Equation 1. ![GUID-1018BFFD-0C68-4A20-B8B1-8271FB572B5D-low.gif](/ods/images/JAJSJ53B/GUID-1018BFFD-0C68-4A20-B8B1-8271FB572B5D-low.gif)
- Calculate R(FB) according to Equation 2.
Equation 2. ![GUID-24C16D3B-A919-437A-B69E-37DFA558F258-low.gif](/ods/images/JAJSJ53B/GUID-24C16D3B-A919-437A-B69E-37DFA558F258-low.gif)
- C(COMP) in parallel with
R(FA) is required to stabilize V(OUT) when
C(BUS) is large. Start with C(COMP) ≥ 3 ×
G(CS) × C(OUT), then adjust C(COMP) to
optimize the load transient of the voltage regulator output. V(OUT)
stability must always be verified in the end application circuit.