Description:

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 36 V and efficiently reduces it to 12 V. The board measures only 0.7″ × 0.7″ yet delivers typical continuous output currents between 1.4 A and 2.2 A, depending on the input voltage, which makes this regulator well suited for powering moderate loads like sensors or small motors. An optional enable input can be used to put the regulator in a low-power state with a current draw of 5 µA to 10 µA per volt on VIN. The regulator also features reverse voltage protection and a power-good output indicates when the regulator cannot adequately maintain the output voltage.

Features:

• Input voltage:
  • 4 V to 36 V for the version that outputs 3.3 V
  • [output voltage + dropout voltage] to 36 V for output voltages of 5 V and higher (see the dropout voltage section for details)
• Fixed 3.3 V, 5 V, 6 V, 7.5 V, 9 V, or 12 V output (depending on regulator version) with 4% accuracy
• Typical maximum continuous output currents between 1.4 A abd 2.6 A (see the maximum continuous output current graph below)
• Typical efficiency of 85% to 95%, depending on input voltage, output voltage, and load (see the efficiency graph below)
• Switching frequency: ~400 kHz
• Integrated reverse-voltage protection, over-current and short-circuit protection, over-temperature shutoff, and soft-start
• 1 mA typical no-load quiescent current; this can be reduced to approximately 5 µA to 10 µA per volt on VIN by disabling the board (see the quiescent current graph below)
• “Power good” output indicates when the regulator cannot adequately maintain the output voltage
• Compact size: 0.7″ × 0.7″ × 0.31″ (17.8 mm × 17.8 mm × 8 mm)
• Two 0.086″ mounting holes for #2 or M2 screws