MAX8989

Multimode PA Step-Down Converter with Linear Bypass Mode

Compact Package (1.6mm x 1.6mm) Powers Multimode PAs Efficiently to Extend Talk Time Up to 25% in Mobile Phones

Data Sheet (Rev. 1)
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Part Details

  • PA Step-Down Converter
    • 25µs (typ) Settling Time for 0.4V to 3.2V Output Voltage Change
    • Dynamic Output Voltage Setting from 0.4V to VIN
    • 85mΩ pFET and 100% Duty Cycle for Low Dropout
    • 2MHz Switching Frequency
    • Low Output Voltage Ripple
    • 2% Output Voltage Accuracy Over Load, Line, and Temperature
    • Tiny External Components
  • 2.5A Output Current Capability
  • Simple Logic On/Off Control
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Supply Voltage Range
  • Thermal Overload Protection
  • 1.6mm x 1.6mm WLP Package (0.69mm max Height)
MAX8989
Multimode PA Step-Down Converter with Linear Bypass Mode
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Hardware Ecosystem

Parts Product Life Cycle Description
Internal Power Switch Buck Regulators 1
MAX8896
LAST TIME BUY Dual PWM Step-Down Converter in a 2mm x 2mm Package for WCDMA PA and RF Power
Product 1
MAX8805
600mA/650mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power
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Evaluation Kits

MAX8989EVKIT

Evaluation Kit for the MAX8989

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Features and Benefits

  • PA Step-Down Converter
    • 25µs (typ) Settling Time for 0.4V to 3.2V Output-Voltage Change
    • Dynamic Output-Voltage Setting from 0.4V to VIN
    • 85mΩ PFET and 100% Duty Cycle for Low Dropout
    • 2MHz Switching Frequency
    • Low Output-Voltage Ripple
    • 2% Output-Voltage Accuracy Over Load, Line, and Temperature
    • Tiny External Components
  • 2.5A Output-Current Capability
  • Simple Logic On/Off Control
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Supply Voltage Range
  • Thermal-Overload Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX8989 evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX8989 step-down converter with linear bypass regulator. The EV kit operates from a 2.7V to 5.5V power supply or battery. The output regulates to twice the voltage at REFIN (0.2V to 1.7V) and provides up to 2.5A drive capability.

Applications

  • LTE, WCDMA, GSM, and EDGE Cell Phones/Smartphones
MAX8989EVKIT
Evaluation Kit for the MAX8989

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