Description
The ST750A is an adjustable output CMOS, stepdown 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 0.3mA in shutdown mode. The output does not exhibit frequency over this specified range. Pulsewidth modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±4.5% plus feedback resistor tolerance over line, load, and temperature variations.

FEATUREs
■ Up to 450mA load currents
■ 200kHz high-frequency current-mode PWM
■ 85% to 96% efficiencies
■ 33mH or 100mH pre-selected inductor value, no component design required
■ 0.8mA quiescent current
■ 0.3µA shutdown supply current
■ Adjustable output voltage
■ Overcurrent, soft-start and undervoltage lockout protection
■ Cycle-by-cycle current limiting
■ Package available: SO-8