Step-Down Buck Controllers
Overview
Switching regulator with an external switching MosFET, operating in the Buck non-isolated topology, used in DC/DC power supplies. Microsemi offers Buck Controllers with three different Control Modes: Current Control Mode, Voltage Control Mode and Hysteretic Control Mode. Microsemi's Hysteretic Control Mode offers best-in-industry transient response. The article Voltage-Mode, Current-Mode (and Hysteretic Control) offers more details on the differences between the difference Control Modes. To learn how to estimate Buck Converters efficiency, see Unraveling Step-Down (Buck) Efficiency.
Microsemi's DC/DC Selection Guide can be found at DC-DC Product Selection Guide.
Microsemi's DC/DC Selection Guide can be found at DC-DC Product Selection Guide.
P/N | Switch Outs | Phases | LDO Outputs | Vin (V) | Iout (A) | Vout (V) | Iq (mA) | Ext. Sync | Switch Freq. (kHz) | Control Mode |
LX7302 | 1 | 1 | No | 5-26 | 30 | 0.6-2.5 VID | 1.8 | No | 200-1000 | Hysteretic COT |
LX7309 | 1 | 1 | No | 7-80 | 30 | 0.2-80 | 3 | Yes | 100-1000 | Current |