L4963D

® L4963 L4963D 1.5A SWITCHING REGULATOR 1.5A OUTPUT LOAD CURRENT 5.1 TO 36V OUTPUT VOLTAGE RANGE DISCONTINUOUS VARIABLE FREQUENCY MODE PRECISE (+/–2%) ON CHIP REFERENCE VERY HIGH EFFICIENCY VERY FEW EXTERNAL COMPONENTS NO FREQ. COMPENSATION REQUIRED RESET AND POWER FAIL OUTPUT FOR MICROPROCESSOR INTERNAL CURRENT LIMITING THERMAL SHUTDOWN Powerdip12+3+3 SO20 ORDERING NUMBERS: DESCRIPTION The L4963 is a monolithic power switching regulator delivering 1.5A at 5.1V. The output voltage is adjustable from 5.1V to 36V, working in discontinuous variable frequency mode. Features of the device include remote inhibit, internal current limiting and thermal protection, reset and power fail outputs for microprocessor. BLOCK DIAGRAM L4963W L4963D The L4963 is mounted in a 12+3+3 lead Powerdip (L4963) and SO20 large (L4963D) plastic packages and requires very few external components. June 2000 This is advanced information on a new product now in development or underogin evaluation. Details are subject to change without notice. 1/17 L4963 - L4963D ABSOLUTE MAXIMUM RATINGS Symbol SO20 Vi V3–V2 V2 V2 V8 V9, V11 V 10 V13 , V18 V19 , V20 Ptot V7 V8, V10 V9 V12, V16 V17, V18 Powerdip Input Voltage (pin 1 and pin 3 connected togheter) Input to Output Voltage Difference Negative Output DC Voltage Negative Output Peak Voltage at t=0.2 µs, f=50kHz Power Fail Input Reset and Power Fail Output Reset Delay Input Feedback and Inhibit Inputs Oscillator Inputs Total Power Dissipation Tpins ≤ 90°...