L4963W Step-Down Switching Regulator Adjustable 5.1V to 36V 1.5A DIP-18

L4963W Step-Down Switching Regulator Adjustable 5.1V to 36V 1.5A DIP-18 The L4963W is a monolithic power switching regulator designed to deliver a constant 1.5A output current . It operates in a discontinuous variable frequency mode, providing a highly efficient solution for step-down voltage regulation . The device features a standard 5.1V output that can be adjusted up to 36V with minimal external components . It is specifically engineered to support microprocessor systems by including integrated reset and power-fail monitoring circuits . Features High Output Capability: Delivers up to 1.5A of load current . Wide Adjustable Range: Output voltage is adjustable from 5.1V to 36V . Microprocessor Support: Built-in Reset and Power Fail outputs for system monitoring . High Efficiency: Designed for very high efficiency operation . Simplified Design: Requires very few external components and no frequency compensation . System Protection: Includes internal current limiting and thermal shutdown protection . Remote Control: Features a TTL-level remote inhibit input for electronic on/off control . Precision Reference: Precise (+/-2%) on-chip voltage reference . PIN Configuration Specifications Parameter Conditions / Details Min Typ Max Unit Input Voltage Range (Vi) Vo = Vref to 36V, Io = 0.5A 9 – 46 V Output Voltage Range (Vo) Vi = 46V, Io = 0.5A 5.1 – 36 V Output Load Current (Io) Vi = 9V to 46V, Vo = Vref 1.5 – – A Feedback Voltage (V12) Vi = 9V to 46V, Io = 0.5A 5.0 5.1 5.2 V Line Regulation (ΔVo) Vi = 9V to 46V, Vo = Vref, Io = 0.5A – 15 50 mV Load Regulation (ΔVo) Vo = Vref, Io = 0.5A to 1.5A – 15 45 mV Current Limiting (I2L) Vi = 9V to 46V, Vo = Vref to 28V 3.5 – 6.5 A Supply Voltage Ripple Rejection (SVR) Vi = 2Vrms, ripple = 100Hz 50 56 – dB Efficiency (η) Io = 1.5A, Vo = Vref 65 75 – % Oscillator Frequency (f) Rt = 51KΩ 46 60 79 kHz Quiescent Drain Current (Iq) Vi = 46V, Io = 0mA – 14 20 mA Thermal Shutdown (Tsd) Junction Temperature 145 150 – °C Inhibit Low Input Voltage (V16L) Vi = 9V to 46V 0.3 – 0.8 V Inhibit High Input Voltage (V16H) Vi = 9V to 46V 2.0 – 5.5 V Applications Microprocessor Power Supplies Step-Down (Buck) Regulators Remote Power Management Industrial Electronics Package Content 1 x L4963W Step-Down Switching Regulator Adjustable 5.1V to 36V 1.5A DIP-18 DataSheet l4963