Power Matters™

Step-Down Buck Regulators

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Switching regulators with an integrated switching MosFET. Used in the Buck topology in non-isolated DC/DC power supplies. Microsemi offers switching regulators from 1A to 9A and above, in three topologies: Current Control, Voltage Control and Hysteretic Control. 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.

P/N Iout (A) Vout (V)  Vin (V) Fsw (MHz) PSM Pgood EXT Sync Package Comment
LX7104 1.5 0.81-15 4.5-18 1.4 No No No SOT23-6 Current Mode
LX7167A  2.4 0.6-0.5 VIN 3-5.5 3 Yes Yes No DFN 2x2 CF Hysteretic
LX7180A 4 0.6-5 3-5.5 1.65 Yes Yes  No QFN 2x2  CF Hysteretic, I2C Monitoring
LX7178 5 3.3 3-5.5  1.875  Yes Yes No WLCSP-20 1.8x2 CF Hysteretic, I2C Monitoring
LX7165 5 0.6-3.3 3-5.5 1.875 Yes Yes No WLCSP-20 1.8x2 CF Hysteretic, I2C Monitoring
NX9415 5 0.8-5 8-22 0-1 No No No MCM-24 4x4 Voltage Mode
NX9548 9 0.75-5 4.5-24 0.2-1 Yes Yes Yes MCM-32 5x5 COT