General Description

The MAX1953/MAX1954/MAX1957 is a family of versatile, economical, synchronous current-mode, pulse-width modulation (PWM) buck controllers. These step-down controllers are targeted for applications where cost and size are critical.

Features

♦ Low-Cost Current-Mode Controllers

♦ Fixed-Frequency PWM

♦ MAX1953 1MHz Switching Frequency Small Component Size, Low Cost Adjustable Current Limit

♦ MAX1954 3V to 13.2V Input Voltage 25A Output Current Capability 93 Efficiency 300kHz Switching Frequency

♦ MAX1957 Tracking 0.4V to 0.86VIN Output Voltage Range Sinking and Sourcing Capability of 3A

♦ Shutdown Feature

♦ All N-Channel MOSFET Design for Low Cost

♦ No Current-Sense Resistor Needed

♦ Internal Digital† Soft-Start

♦ Thermal Overload Protection

♦ Small 10-Pin µMAX Package

Applications

Printers and Scanners

Graphic Cards and Video Cards

PCs and Servers

Microprocessor Core Supply

Low-Voltage Distributed Power

Telecommunications and Networking