MAXREFDES1020

描述

The MAX15118 high-efficiency, current-mode step-down regulator with integrated power switches operates from 2.7V to 5.5V and delivers up to 18A output current in a small 2mm x 3mm package. The MAX15118 offers excellent efficiency with skip mode capability at lightload conditions, yet provides unmatched efficiency under heavy load conditions. The combination of small size and high efficiency makes this device suitable for both portable and nonportable applications.

The MAX15118 uses a current-mode control architecture with a high-gain transconductance error amplifier, which allows a simple compensation scheme and enables a cycle-by-cycle current limit with fast response to line and load transients. A factory-trimmed switching frequency of 1MHz (PWM operation) allows for a compact, all-ceramic capacitor design.

Integrated switches with low on-resistance ensure high efficiency at heavy loads while minimizing critical inductances.

优势和特点

• ±1% Feedback Accuracy Over Load, Line, and Temperature
• Input Undervoltage Lockout
• Programmable Soft-Start
• Adjustable Soft-Start
• External Reference Input
• Selectable Skip Mode Option for Improved Efficiency at Light Loads