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