General Description

The MAX1966/MAX1967 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers that are ideal for a variety of cost-sensitive applications. They drive low-cost N-MOSFETs for both the high-side switch and synchronous rectifier and require no external Schottky power diode or current-sense resistor. Short circuit and current-limit protection is provided by sensing the drain-to-source voltage on the low-side FET. Both devices can supply outputs as low as 0.8V and are well suited for DSP cores and other low-voltage logic.

Features

♦ Cost-Optimized Design

♦ No Schottky Diode or Current-Sense Resistor

Required

♦ >95 Efficiency

♦ Low-Cost External Components

♦ All N-Channel FET Design

♦ 2.7V to 5.5V Input Range (MAX1966)

♦ 2.7V to 28V Input Range (MAX1967)

♦ 0.8V Feedback for Low-Voltage Outputs

♦ 100kHz Switching Frequency Accommodates

Low-Cost Components

♦ Thermal Shutdown

♦ Output Current-Limit and Short-Circuit Protection

Applications

Set-Top Boxes

Graphic Card Supplies

xDSL Modems and Routers

Cable Modems and Routers

Telecom Power Supplies

Networking Power Supplies

Termination Supplies