MAX1763

• +0.7V to +5.5V Input Range
• Output Voltages
  • +3.3V Fixed Output at 1.1A (left side)
  • +3.3V Fixed Output at 1.4A (right side)
  • +2.8V LDO Linear Regulator Output at 1A (right side) as Shipped
• Internal N-Channel Power Switch and P-Channel Synchronous Rectifier
• 1µA Shutdown Current
• 1MHz Switching Frequency
• Externally Synchronizable (500kHz to 1.2MHz)
• Surface-Mount Components
• Fully Assembled and Tested

The MAX1763 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) that contains two separate boost switching-regulator circuits. The first circuit (left side) utilizes a MAX1763 in a 16-pin QSOP package and is configured for a +3.3V output that accepts inputs from a +0.7V to VOUT source and provides up to 1.1A of current. A 1- or 2-cell alkaline battery source can also power the input.

The second circuit (right side) uses a MAX1763 in a high-power 16-pin TSSOP-EP (exposed pad) package, is configured for a +3.3V output, and supplies up to 1.4A of current. It accepts inputs from a +0.7V to +5.5V source, or a 1- or 2-cell alkaline battery can power the input. The right side includes a low-dropout (LDO) linear regulator that draws power from the +3.3V output and provides +2.8V at up to 1A of current.

The MAX1763 features an internal N-channel MOSFET switch, a P-channel MOSFET synchronous rectifier, and pulse-width modulation (PWM) operation for maximum efficiency. The MAX1763 EV kit demonstrates low quiescent current and high efficiency up to 96% for maximum battery life. Operation at 1MHz allows the use of tiny surface-mount components.

Applications

• Cable Modems
• Cell Phones
• Consumer Audio
• Cordless Phones
• Digital Still Cameras
• Global Positioning Systems (GPS)
• Pagers
• Pen Entry Palmtops
• POS Terminals
• Wireless Data
• Wireless Local Area Networks (WLANs)
• Wireless Local Loop (WLL)