28 V, 3 A Non-Synchronous Step-Down Converter

The SKY87608 is a step-down DC-DC converter that operates with a wide 4.5 V to 28 V input voltage range and regulates the output voltage as low as 0.9 V while supplying up to 3 A to the output. The 450 kHz switching frequency allows for an efficient step-down regulator design.

The SKY87608 uses an adjustable output voltage that can be set from 12% to 80% of the input voltage by an external resistive voltage divider. Internal soft-start prevents excessive inrush current without requiring an external capacitor.

The SKY87608 includes input under-voltage and overcurrent protection to prevent damage in the event of a fault condition. Thermal overload protection prevents damage to the SKY87608 or circuit board when operating beyond its thermal capability.

The SKY87608 is available in a small Pb-free, 8-pin, SOP-8L-EP package.

Please note: SKY87608-11-577LF is being discontinued and is not recommended for new designs.

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Min. VIN (V)4.5
Max. VIN (V)28
Min. VOUT (V)0.9
Max. VOUT (V)0.8*VIN
IOUT (mA)3000
fOSC (kHz)450
Typ. IQ (μA)1600
PackageSOP, 8L
Package (mm)5.0x6.0x1.55


  • 4.5 V to 28 V input voltage
  • Up to 97% efficiency
  • Internal 180 mΩ high-side N-channel MOSFET
  • Internal 12 Ω refresh MOSFET
  • Up to 3 A load current
  • Adjustable output voltage (0.9 V to 0.8 × VIN)
  • Fixed 450 kHz switching frequency
  • 4 ms soft-start period
  • External compensation
  • Less than 1 μA shutdown current
  • Current limit protection
  • Standard 8-pin SOP-8L package (MSL1, 260 °C per JEDEC-J-STD-020) with exposed pad

Product Documents

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