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IC-Hersteller Sky Works

IC-Hersteller (84)

Sky Works SKY87203

3.5 A Constant On-Time, Step-Down DC-DC Converter


Eingangsspannung2.7-6 V
Schaltfrequenz600-1500 kHz
Ausgang 13.6 V / 3.5 A


The SKY87203 is a variable switching frequency, 3.5 A constant on-time, synchronous step-down converter. The device provides an output voltage from 0.9 V to 4.0 V from input voltage ranging from 2.7 V to 6.0 V, while keeping excellent line and load regulation and maximizing efficiency.The constant on-time control allows easy loop stabilization with minimal external components while providing fast transient response.Power sequencing is controlled by the EN and PG pins.The SKY87203 has cycle-by-cycle current limits and thermalshutdown to protect against fault conditions.The SKY87203 is available in a 12-pin, 2 mm  2 mm Quad Flat No-Lead (QFN) package. A typical application circuit is shown in Figure 1. The pin configuration and packages are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1.


  • Input voltage range: 2.7 V to 6.0 V
  • Output voltage range: 0.9 V to 4.0 V
  • Variable switching frequency: 600 kHz to 1.5 MHz
  • Up to 3.5 A continuous output current
  • 95% peak efficiency
  • Typical switch on resistance: 50 m PMOS, 40 m NMOS
  • 80% light load efficiency
  • Power sequencing
  • Cycle-by-cycle over-current protection
  • Auto-discharge at power-off
  • Over-temperature protection
  • Control loop stabilization with low ESR ceramic capacitors
  • Soft start
  • Low profile, QFN (12-pin, 2 mm  2 mm) package (MSL1,260 C per JEDEC J-STD-020)

Typische Anwendungen

  • Access points
  • Set-top boxes
  • Portable devices

Weiterführende Informationen