The LM4600x SIMPLE SWITCHER® regulators are easy to use synchronous step-down DC-DC converters capable of driving up to 2 A of load current from an input voltage ranging from 3.5 V to 60 V. The LM4600x family provides exceptional efficiency, output accuracy, and drop-out voltage in a very small solution size. An extended family is available in various load current options and 36 V maximum input voltage in pin-to-pin compatible packages, including LM46001, LM46000, LM46002, LM43603, LM43602, LM43601 and LM43600. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, a Power Good flag, precision enable, internal soft-start, extendable soft-start, and tracking provide a flexible and easy to use platform for a wide range of applications. Discontinuous conduction and automatic frequency reduction at light loads improve light load efficiency. The family requires few external components. Pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC under-voltage lockout, cycle-by-cycle current limit, and output short circuit protection. The LM4600x devices are available in the HTSSOP/PWP 16-lead package (5.1 x 6.6 x 1.2 mm) with 0.65 mm lead pitch.