This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40 V and efficiently reduces it to 5 V with an available output current of around 15 A. Typical efficiencies of 80% to 95% along with its high current capabilities make this regulator well suited for powering large loads. The regulator features reverse voltage protection and a power-good output that indicates when the regulator cannot adequately maintain the output voltage.

These regulators have an instantaneous current limit of approximately 32 A, but they are limited in the long term to much lower currents by power dissipation and the corresponding temperature rise that induces in the board. The regulators can typically support continuous output currents between 5 A and 20 A without additional cooling (such as with a heat sink or forced airflow), depending on the input voltage and output voltage. In general, the available output current is a little higher for the lower-voltage versions than it is for the higher-voltage versions, and it decreases as the input voltage increases.

SAFETY NOTICE:

During normal operation, this product can get hot enough to burn you. Even with very light loads, the regulator can run very hot if the input voltage is high, and the higher the input voltage the hotter the regulator will run. Take care when handling this product or other components connected to it.

Dimensions:

• Size:1.7″ × 1.25″ × 0.43″
• Weight: 19 g

General specifications:

• Minimum operating voltage: 6V
• Maximum operating voltage:40V
• Continuous output current: 15A (Approx.)
• Maximum instantaneous current: 32A
• Output voltage:5V
• Reverse voltage protection?: Y
• Maximum quiescent current: 100mA

Identifying markings:

• PCB dev codes:     reg18b
• Other PCB markings:     0J9727