The TPS54332 is a 28-V, 3.5-A
non-synchronous buck converter that integrates a low-R DS(on) high-side
MOSFET. To increase efficiency at light loads, a pulse-skipping Eco-mode feature is
automatically activated. Furthermore, the 1-µA shutdown supply current allows the
device to be used in battery-powered applications. Current mode control with
internal slope compensation simplifies the external compensation calculations and
reduces component count while allowing the use of ceramic output capacitors. A
resistor divider programs the hysteresis of the input undervoltage lockout. An
overvoltage transient protection circuit limits voltage overshoots during start-up
and transient conditions. A cycle-by-cycle current limit scheme, frequency foldback
and thermal shutdown protect the device and the load in the event of an overload
condition. The TPS54332 is available in an 8-pin SOIC PowerPAD integrated circuit
package.