MAX1957 - Maxim

MAX1957 Low-Cost / High-Frequency / Current-Mode PWM Buck Controller

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. The MAX1953 operates at a fixed 1MHz switching frequency, thus significantly reducing external component size and cost. Additiona.

Features

a tracking output voltage range of 0.4V to 0.86VIN and is capable of sourcing or sinking current for applications such as DDR bus termination and PowerPC™/ASIC/DSP core supplies. The MAX1957 operates from a 3V to 5.5V input voltage and at a fixed 300kHz switching frequency. The MAX1953/MAX1954/MAX1957 provide a COMP pin that can be pulled low to shut down the converter in addition to providing compensation to the error amplifier. An input undervoltage lockout (ULVO) is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFETs from overheating. Interna.