The LMR516xx-Q1 converter is an easy-to-use, synchronous, step-down DC/DC converter operating from a 4V to 65V supply voltage. The LMR51610-Q1 is capable of delivering up to 1A DC load current in a very small design size, while the LMR51606-Q1 is capable of delivering up to 0.6A load current. The family has multiple versions applicable to various applications. For detailed information, see the Device Comparison Table.

The LMR516xx-Q1 employs fixed-frequency peak-current mode control. The PFM version enters PFM mode at light load to achieve high efficiency. A FPWM version is provided to achieve low output voltage ripple, tight output voltage regulation, and constant switching frequency at light load. The device is internally compensated, which reduces design time and requires few external components.

Additional features, such as precision enable and internal soft start, provide a flexible and easy-to-use design for a wide range of applications. Protection features include the following:

• Thermal shutdown
• V_IN undervoltage lockout
• Cycle-by-cycle current limit
• Hiccup mode short-circuit protection

This family of devices requires very few external components and has a pinout designed for simple, designed for PCB layout.