MAX8805W

600mA/650mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power

Small (4mm)² Package Provides Power and Bias to 2 WCDMA PA Modules

Data Sheet (Rev. 5)
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Part Details

  • PA Step-Down Converter
    • 7.5µs (typ) Settling Time for 0.8V to 3.4V Output Voltage Change
    • Dynamic Output Voltage Setting from 0.4V to VBATT
    • 60mΩ pFET and 100% Duty Cycle for Low Dropout
    • 2MHz or 4MHz Switching Frequency
    • Low Output-Voltage Ripple
    • 600mA (MAX8805Y/MAX8805Z) or 650mA (MAX8805W/MAX8805X) Output Drive Capability
    • 2% Gain Accuracy
    • Tiny External Components
  • Dual Low-Noise LDOs
    • Low 35µVRMS (typ) Output Noise
    • High 70dB (typ) PSRR
    • Guaranteed 200mA Output Drive Capability
    • Individual ON/OFF Control
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Supply Voltage Range
  • Thermal Shutdown
  • Tiny 2mm x 2mm x 0.7mm WLP and UCSP Packages (4 x 4 Grid)
MAX8805W
600mA/650mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power
MAX8805Y, MAX8805Z
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Evaluation Kits

MAX8805WEVKIT

Evaluation Kit for the MAX8805W/X/Y/Z

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Features and Benefits

  • PA Step-Down Converter
    • 7.5µs (typ) Settling Time for 0.8V to 3.4V Output-Voltage Change
    • Dynamic Output-Voltage Setting from 0.32V to VBATT
    • 60mΩ pFET and 100% Duty Cycle for Low Dropout
    • 2MHz or 4MHz Switching Frequency
    • Low Output-Voltage Ripple
    • 650mA Output Drive Capability (MAX8805W/MAX8805X)
    • 600mA Output Drive Capability (MAX8805Y/MAX8805Z)
    • 2% Maximum Accuracy
  • Dual Low-Noise LDOs
    • Low 35µVRMS (typ) Output Noise
    • High 70dB (typ) PSRR
    • Guaranteed 200mA Output Drive Capability
    • Individual ON/OFF Control
  • Tiny External Components
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Supply Voltage Range
  • Thermal Shutdown
  • Tiny 2mm x 2mm x 0.7mm WLP Package (4 x 4 Grid)
  • Fully Assembled and Tested

Product Details

The MAX8805W evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that demonstrates the highly integrated MAX8805W stepdown DC-DC converter optimized for dynamically powering the power amplifier (PA) in WCDMA or NCDMA handsets. The MAX8805W EV kit can dynamically control the step-down output voltage in the 0.32V to VBATT range from a 2.7V to 5.5V input-voltage range, and delivers 650mA of load current in low-power mode. In high-power mode, the step-down output is directly connected to the input by the internal 60mΩ bypass pFET. Two low-noise LDOs are also integrated in the MAX8805W. The MAX8805W EV kit can also evaluate the MAX8805X/MAX8805Y/MAX8805Z. To evaluate the MAX8805X/MAX8805Y/MAX8805Z, order a free sample along with this EV kit.
MAX8805WEVKIT
Evaluation Kit for the MAX8805W/X/Y/Z

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