GENERAL DESCRIPTION

The ML4866 is a high efficiency pulse width modulated (PWM) buck regulator designed for use in 5V systems or portable equipment that need a compact, efficienct 3.3V supply. It has a switching frequency of 120kHz and uses synchronous rectification to optimize power conversion efficiency. Unlike other solutions, the ML4866 requires no external diodes or FETs.

FEATURES

■ High power conversion efficiency over 2 decades of load current

■ No external FETs or diodes; minimum external components

■ 3.5V to 6.5V input voltage range

■ Significantly extends battery life over linear regulator based solutions

■ Micropower operation

■ Low shutdown mode quiescent current