MAX1519 Datasheet | Maxim Integrated

Description Features o Dual-Phase, Quick-PWM Controllers o ±0.75% VOUT Accuracy Over Line, Load, and Temperature (1.3V) o Active Voltage Positioning with Adjustable Gain and Offset o 5-Bit On-Board DAC Mobile: 0.60V to 1.75V Output Range Desktop: 1.10V to 1.85V Output Range o Selectable 100k Hz/200k Hz/300k Hz/550k Hz Switching Frequency o 4V to 28V Battery Input Voltage Range o Adjustable Slew-Rate Control o Drive Large Synchronous Rectifier MOSFETs o Output Overvoltage Protection (MAX1545 Only) o Undervoltage and Thermal-Fault Protection o Power Sequencing and Timing o Selectable Suspend Voltage (0.675V to 1.45V) o Soft-Shutdown o Selectable Single- or Dual-Phase Pulse Skipping MAX1519/MAX1545 The MAX1519/MAX1545 are dual-phase, Quick-PWM™, step-down controllers for desktop and mobile Pentium®4 (P4) CPU core supplies. Dual-phase operation reduces input ripple current requirements and output voltage ripple while easing ponent selection and layout difficulties. The Quick-PWM control scheme provides instantaneous response to fast load-current steps. The MAX1519/MAX1545 include active voltage positioning with adjustable gain and offset, reducing power dissipation and bulk output capacitance requirements. The MAX1519/MAX1545 are intended for two different notebook CPU core applications: stepping down the battery directly or stepping down the 5V system supply to create the core voltage. The single-stage conversion method allows these devices to directly step down highvoltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the 5V system supply instead of the battery) at a higher switching frequency provides the minimum possible physical size. The MAX1519/MAX1545 ply with Intel’s P4 specifications. The switching regulator features soft-start, power-up sequencing, and soft-shutdown. The MAX1519/MAX1545 also feature independent four-level logic inputs for setting the suspend voltage (S0- S1). The MAX1519/MAX1545 include output...