LTC1430 Datasheet | Linear Technology

LTC1430 High Power Step-Down Switching Regulator Controller Features s s s s DESCRIPTIO s s s s s s s s High Power 5V to 3.x V Switching Controller: Can Exceed 10A Output All N-Channel External MOSFETs Constant Frequency Operation- Small Inductor Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations High Efficiency: Over 95% Possible Fixed Frequency Operation No Low Value Sense Resistor Needed Outputs Can Drive External FETs with Up to 10,000p F Gate Capacitance Quiescent Current: 350µA Typ, 1µA in Shutdown Fast Transient Response Adjustable or Fixed 3.3V Output Available in 8- and 16-Lead PDIP and SO Packages The LTC ®1430 is a high power, high efficiency switching regulator controller optimized for 5V to 3.x V applications. It includes a precision internal reference and an internal feedback system that can provide output regulation of ±1% over temperature, load current and line voltage shifts. The LTC1430 uses a synchronous switching architecture with two N-channel output devices, eliminating the need for a high power, high cost P-channel device. Additionally, it senses output current across the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without an external low value sense resistor. The LTC1430 includes a fixed frequency PWM oscillator for low output ripple under virtually all operating conditions. The 200k Hz free-running clock frequency can be externally adjusted from 100k Hz to above 500k Hz. The LTC1430 Features low 350µA quiescent current, allowing greater than 90% efficiency operation in converter designs from 1A to greater than 50A output current. Shutdown mode drops the LTC1430 supply current to 1µA. , LTC and LT are registered trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. U APPLICATIO S s s s s Power Supply for P6 and Pentium® Microprocessors High Power 5V to 3.x V Regulators Local Regulation for Dual Voltage Logic Boards Low...