General Description

The MAX17021/MAX17082/MAX17482 are 2/1-phase interleaved Quick-PWM™ step-down VID power-supply controllers for notebook CPUs. True out-of-phase operation reduces input ripple current requirements and output- voltage ripple, while easing component selection and layout difficulties. The Quick-PWM control provides instantaneous response to fast load-current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal positioning compensation for tantalum, polymer, or ceramic bulk output capacitors.

Features

♦ Single-/Dual-Phase, Quick-PWM Controllers

♦ MAX17021 IMVP-6+ (Montevina)

♦ MAX17082/MAX17482 IMVP-6.5 (Calpella)

♦ ±0.5 VOUT Accuracy Over Line, Load, and Temperature

♦ 7-Bit 0 to 1.50V VID Control

♦ Dynamic Phase Selection Optimizes Active/Sleep Efficiency

♦ Transient Phase Overlap Reduces Output Capacitance

♦ Integrated Boost Switches

♦ Active Voltage Positioning with Adjustable Gain

♦ Programmable 200kHz to 800kHz Switching Frequency

♦ Accurate Current Balance and Current Limit

♦ Adjustable Slew-Rate Control

♦ Power-Good, Clock Enable, and Thermal-Fault Outputs

♦ Phase Current Imbalance Fault Output

♦ Drives Large Synchronous Rectifier MOSFETs

♦ 4V to 26V Battery Input-Voltage Range

♦ Undervoltage and Thermal-Fault Protection

♦ Overvoltage Protection (MAX17021/MAX17082)

♦ Soft-Startup and Soft-Shutdown