Skyworks Solutions' SKY87000-13 dynamically controls the operating voltage of a multi-mode WCDMA or GSM / EDGE power amplifier (PA) solution. The SKY87000-13 outputs a voltage between 0.40 V and 4.25 V, giving optimum efficiency for all operating states. The output voltage of the device is controlled by an analog signal from the baseband processor. The SKY87000-13 can support up to 2 A of total load current with step-down and bypass regulators. The 2 MHz switching frequency is optimized for a typical 2.2 μH inductor and reduced output capacitance.

Features and Benefits

• Input voltage range: 2.7 V to 5.5 V
• Dynamic output voltage: 0.4 V to 4.25 V
  • 0.16 V to 1.7 V reference input range
  • 2.5 times the reference input voltage to regulator output gain
• Internally compensated current / mode architecture:
  • 2 MHz switching frequency
  • 2.2 µH chip inductor
  • Two 4.7 µF output capacitors
  • Wide duty cycle range (100% duty cycle operation)
• Integrated 85 mΩ (typ.) bypass regulator
• Less than 10 µs response for 1 V output step
• Up to 2 A (typ.) output current
• Small 9-bump WLCSP package (MSL1, 260°C per JEDEC J-STD-020) package

Applications

• Multi-mode RF PAs
• Smartphones, mobile phones, and cellular phones
• Wireless USB data cards
• Portable media devices