Skyworks SKY87608

Description

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. A typical application circuit is shown in Figure 1. The pin configuration is shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1

Features

• 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

Typical applications

• Industrial applications
• Set-top boxes
• Distributed power systems

More information

• Datasheet
• IC product information