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