General Description

The MAX1907A/MAX1981A are single-phase, Quick-PWM™ master controllers for IMVP-IV™ CPU core supplies. Multi-phase operation is achieved using a Quick-PWM slave controller (MAX1980). Multiphase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties.

Features

♦ Quick-PWM Master Controllers

♦ Multiphase Conversion with Slave Controller

   (MAX1980)

♦ Active Voltage Positioning with Adjustable Gain

   and Offset

♦ Adjustable Slew Rate Control

♦ ±0.75 VOUT Accuracy Over Line, Load, and

   Temperature

♦ 6-Bit On-Board DAC (16mV Increments)

♦ 0.700V to 1.708V Output Adjust Range

♦ Selectable 200kHz/300kHz/550kHz/1000kHz

   Switching Frequency

♦ 2V to 28V Battery Input Voltage Range

♦ Drive Large Synchronous Rectifier MOSFETs

♦ Output Overvoltage Protection (MAX1907A Only)

♦ Undervoltage and Thermal Fault Protection

♦ Power Sequencing and Selectable Boot Voltage

♦ Low-Profile 40-Pin Thin QFN, 6mm ✕ 6mm

   Package

Applications

   IMVP-IV™ Notebook Computers

   Single-Phase CPU Core Supply

   Multiphase CPU Core Supply

   Voltage-Positioned Step-Down Converters

   Servers/Desktop Computers