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
● Industrial +24V and +28V Systems
● LCD Displays
● Palmtop Computers