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LMZ31506: LMZ31506 Setting for 9V → 5V Step Down

Part Number: LMZ31506

LMZ31506 When setting 9V → 5V step down

RSET 196 Ω
It can be read from the datasheet that RRT 86.6 kΩ
For COUT 1 and COUT 2
How much should each capacitor capacity be set appropriately?

  • The minimum required capacitance for the LMZ31506 with 5V output is 47uF ceramic capacitance. (see table 3 in datasheet)
    Additional capacitance can be added to improve transient response. I would recommend adding 100uF to 220uF of polymer tantalum type capacitance in addition to the 47uF ceramic.