MAX618
Features o Adjustable Output Voltage Up to +28V o Up to 93% Efficiency o Wide Input Voltage Range (+3V to +28V) o Up to 500m A Output Current at +12V o 500µA Quiescent Supply Current o 3µA Shutdown Current o 250k Hz Switching Frequency o Small 1W 16-Pin QSOP Package
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 500m A or more. A PWM control scheme bined 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%. A fast 250k Hz switching frequency allows the use of small surface-mount inductors and capacitors. A shutdown mode extends battery life when the device is not in use. Adaptive slope pensation allows the MAX618 to acmodate a wide range of input and...
