General Description

The MAX17000A pulse-width modulation (PWM) controller provides a complete power solution for notebook DDR, DDR2, and DDR3 memory. It comprises a stepdown controller, a source-sink LDO regulator, and a reference buffer to generate the required VDDQ, VTT, and VTTR rails.

Features

♦ SMPS Regulator (VDDQ)

    Quick-PWM with 100ns Load-Step Response

    Output Voltages—Preset 1.8V, 1.5V, or Adjustable 1.0V to 2.5V

    1 VOUT Accuracy Over Line and Load

    26V Maximum Input Voltage Rating

    Accurate Valley Current-Limit Protection

    200kHz to 600kHz Switching Frequency

♦ Source/Sink Linear Regulator (VTT)

    ±2A Peak Source/Sink

    Low-Output Capacitance Requirement

    Output Voltages-Preset VDDQ/2 or REFIN Adjustable from 0.5V to 1.5V

♦ Soft-Start/Soft-Shutdown

♦ SMPS Power-Good Window Comparator

♦ VTT Power-Good Window Comparator

♦ Selectable Overvoltage Protection

♦ Undervoltage/Thermal Protections

♦ ±3mA Reference Buffer (VTTR)

Applications

    Notebook Computers

    DDR, DDR2, and DDR3 Memory Supplies

    SSTL Memory Supplies