General Description
The MAX618 CMOS, PWM, step-up DC-DC converter generates output voltages up to 28V and accepts inputs from +3V to +28V. An internal 2A, 0.3Ω switch eliminates the need for external power MOSFETs while supplying output currents up to 500mA or more. A PWM control scheme combined with Idle Mode™ operation at light loads minimizes noise and ripple while maximizing efficiency over a wide load range. No-load operating current is 500µA, which allows efficiency up to 93%.

FEATUREs
♦ Adjustable Output Voltage Up to +28V
♦ Up to 93% Efficiency
♦ Wide Input Voltage Range (+3V to +28V)
♦ Up to 500mA Output Current at +12V
♦ 500µA Quiescent Supply Current
♦ 3µA Shutdown Current
♦ 250kHz Switching Frequency
♦ Small 1W 16-Pin QSOP Package

APPLICATIONs
   Automotive-Powered DC-DC Converters
   Industrial +24V and +28V Systems
   LCD Displays
   Palmtop Computers