24V Step-Up/Step-Down Voltage Regulator S18V20F24 Pololu

DESCRIPTION

This step-up/step-down regulator takes an input voltage from 3V to 30V and increases or decreases it as necessary to produce a fixed 24V output. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) with a single-ended primary-inductor converter (SEPIC) topology, and they have a typical efficiency between 80% and 90%. The available output current is a function of the input voltage, output voltage, and efficiency, but it will be around 2 A when the input voltage is close to the output voltage.

The flexibility in input voltage offered by this regulator is especially well-suited for battery-powered applications in which the battery voltage begins above the desired output voltage and drops below the target as the battery discharges. Without the typical restriction on the battery voltage staying above the required voltage throughout its life, new battery packs and form factors can be considered. For example:

• A 4-cell battery holder, which might have a 6 V output with fresh alkalines or a 4.0 V output with partially discharged NiMH cells, can be used with the 5V version of this regulator to power a 5 V circuit.
• A disposable 9 V battery powering a 5V circuit can be discharged to under 3 V instead of cutting out at 6 V, as with typical linear or step-down regulators.
• The 6V version of this regulator can be used to enable a wide range of power supply options for a hobby servo project.

FEATURES

• Input voltage: 2.9 V to 32 V (absolute max)
• Fixed 24 V output with 4% accuracy
• Typical maximum output current: 2 A (when the input voltage is close to the output voltage)
• Integrated reverse-voltage protection (up to 30 V), over-current protection, over-temperature shutoff, and under-voltage lockout
• Typical efficiency of 80% to 90%, depending on input voltage, output voltage, and load
• Four 0.086″ mounting holes for #2 or M2 screws
• Compact size: 1.7″ × 0.825″ × 0.38″ (43 × 21 × 10 mm)
• Smaller holes for 0.1″ header pins and larger holes for terminal blocks offer several options for connecting to the board

RESOURCES

• Further Details
• Dimension diagram of the S18V20x Step-Up/Step-Down Voltage Regulator
• 3D model of the S18V20x Step-Up/Step-Down Voltage Regulator
• Step-Up/Step-Down Voltage Regulator S18V20x drill guide