DESCRIPTION

The L5971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 1.26V and 20V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed.

■ UP TO 1.5A STEP DOWN CONVERTER

■ OPERATING INPUT VOLTAGE FROM 6.5V TO 28V

■ PRECISE 1.26V (±1) INTERNAL REFERENCE VOLTAGE

■ OUTPUT VOLTAGE ADJUSTABLE FROM 1.26V TO 20V

■ SWITCHING FREQUENCY ADJUSTABLE UP TO 500KHz

■ VOLTAGE FEEDFORWARD

■ ZERO LOAD CURRENT OPERATION

■ INTERNAL CURRENT LIMITING (PULSE-BY-PULSE AND HICCUP MODE)

■ INHIBIT FOR ZERO CURRENT CONSUMPTION

■ PROTECTION AGAINST FEEDBACK DISCONNECTION

■ THERMAL SHUTDOWN

■ SOFT START FUNCTION