Description ________________________________Features MAX748A/MAX763A The MAX748A/MAX763A are 3.3V-output CMOS, step- o Up to 500mA Load Currents down switching regulators. The MAX748A accepts o Guaranteed 159kHz to 219.5kHz Current-Mode inputs from 3.3V to 16V and delivers up to 500mA. The PWM MAX763A accepts inputs between 3.3V and 11V and delivers up to 500mA. Typical efficiencies are 85% to o 85% to 90% Efficiencies 90%. Quiescent supply current is 1.4mA (MAX763A), o 1.7mA Quiescent Current (MAX748A) and only 0.2µA in shutdown. 1.4mA Quiescent Current (MAX763A) Pulse-width-modulation (PWM) current-mode control pro- o 0.2µA Shutdown Supply Current vides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be o 22µH Preselected Inductor Value; ±5% over line, load, and temperature variations. No Component Design Required Fixed-frequency switching allows easy filtering of output o Overcurrent, Soft-Start, and Undervoltage ripple and nois