ST750A - ST Microelectronics

ST750A ADJUSTABLE STEP-DOWN / CURRENT-MODE PWM DC-DC CONVERTERS

The ST750A is an adjustable output CMOS, step-down switching regulator. The ST750A accepts inputs between 4V and 11V and delivers 450mA. Typical efficiencies are 85% to 96%. Quiescent supply current is 0.8mA and only 0.3µA in shutdown mode. The output does not exhibit frequency over this specified range. Pulse-width modulation (PWM) current-mode control prov.

Features

r tolerance over line, load, and temperature varations. Fixed-frequency switching and absence of subharmonic ruipple allows easy filtering of output ripple and noise, as well as the use of small external components. This regulators require only a single inductor value to work in most applications, so no inductor design is necessary. Typical applications are: Cellular phones & radios, portable Instruments, Portable Communications Equipments and Computer Peripherals. January 2003 1/9 ST750A ABSOLUTE MAXIMUM RATINGS Symbol VCC VLX VSHDN VS,VC ILX IREF PTOT Tstg Top DC Input Voltage Switch Pin .