ds-1550P-04AIC1550 Low-Noise Synchronous PWM Step-Down DC/DC Converter FEATURES 95% Efficiency or up 800mA Guaranteed Output Current. Adjustable Output Voltage from 0.75V to VIN of a range from +2.5V to 6.5V. Very Low Quiescent Current: 35A (Typ.). Fixed- 500KHz or Adjustable Frequency Synchronous PWM Operation. Synchronizable external Switching Frequency up to 1MHz. Accurate Reference: 0.75V (±2%). 100% Duty Cycle in Dropout. Low Profile 8-Pin MSOP Package. DESCRIPTION The AIC1550 is a low-noise pulse-widthmodulated (PWM) DC-DC step-down converter. It powers logic circuits in PDAs and small wireless systems such as cellular phones, handy-terminals. The device features an internal synchronous rectifier for high conversion efficiency. Excellent noise characteristics and fixed-frequency operation prov……