L5971

® L5971 1.5A STEP DOWN SWITCHING REGULATOR 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-BYPULSE AND HICCUP MODE) INHIBIT FOR ZERO CURRENT CONSUMPTION PROTECTION AGAINST FEEDBACK DISCONNECTION THERMAL SHUTDOWN SOFT START FUNCTION 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. TYPICAL APPLICATION CIRCUIT Vi=6V to 28V R1 22K 3(4) 2(3) C2 1.2nF C5 47nF Minidip SO16W ORDERING NUMBERS: L5971 (Minidip) L5971D (SO16) A switching frequency up to 500KHz is achievable (the maximum power dissipation of the packages must be observed). Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. The device is available in plastic dual in line, MINIDIP 8 for standard assembly, and SO16 for SMD assembly. Typical Applications: - High efficiency...