LTC1753

LTC1753 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® III Processor FEATURES s s s s s s s s s DESCRIPTIO s s s 5-Bit Digitally Programmable 1.3V to 3.5V Fixed Output Voltage, VRM 8.4 Compliant Fast Transient Response: 0% to 100% Duty Cycle Phase Lead Compensation for Remote Sensing Overtemperature Protection Flags for Power Good and Overvoltage Fault 19A Output Current Capability from a 5V Supply Dual N-Channel MOSFET Synchronous Driver Initial Output Accuracy: ± 1.5% Excellent Output Accuracy: ±2% Typ Over Line, Load and Temperature Variations High Efficiency: Over 95% Possible Adjustable Current Limit Without External Sense Resistors Available in 2O-Lead SSOP and SW Packages U APPLICATIO S s s Power Supply for Pentium® III, AMD-K6®-2, SPARC, ALPHA and PA-RISC Microprocessors High Power 5V to 1.3V-3.5V Regulators The LTC®1753 is a high power, high efficiency switching regulator controller optimized for 5V input to a digitally programmable 1.3V-3.5V output. The internal 5-bit DAC programs the output voltage from 1.3V to 2.05V in 50mV increments and from 2.1V to 3.5V in 100mV increments. The precision internal reference and an internal feedback system provide an output accuracy of ± 1.5% at room temperature and typically ± 2% over temperature, load current and line voltage shifts. The LTC1753 uses a synchronous switching architecture with two external N-channel output devices, providing high efficiency and eliminating the need for a high p...