LTC3413 Datasheet | Linear Technology

3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination Features n High Efficiency: Up to 90% n ±3A Output Current n Symmetrical Source and Sink Output Current Limit n Low RDS(ON) Internal Switch: 85mΩ n No Schottky Diode Required n 2.25V to 5.5V Input Voltage Range n VOUT = VREF/2 n ±1% Output Voltage Accuracy n Programmable Switching Frequency: Up to 2MHz n Power Good Output Voltage Monitor n Overtemperature Protected n Available in 16-Lead TSSOP Exposed Pad Package APPLICATIONS n Bus Termination: DDR and QDR™ Memory, SSTL, HSTL, ... n Notebook puters n Distributed Power Systems DESCRIPTION The LTC®3413 is a high efficiency monolithic synchronous step-down DC/DC converter utilizing a constant frequency, current mode architecture. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage equal to (0.5)VREF while sourcing or sinking up to 3A of output current. An internal voltage divider reduces ponent count and eliminates the need for external resistors by dividing the reference voltage in half. The internal synchronous power switch with 85mΩ on-resistance increases efficiency and eliminates the need for an external Schottky diode. Switching frequencies up to 2MHz are set by an external resistor. Forced-continuous operation in the LTC3413 reduces noise and RF interference. Fault protection is provided by an overcurrent parator that limits output current during both sourcing and sinking operations. Adjustable pensation allows the transient response to be optimized over a wide range of loads and output capacitors. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178. TYPICAL APPLICATION VIN 2.5V 22μF 4.7M 330p F 5.11k 2200p F SVIN PVIN PGOOD VREF RUN/SS PGND SGND L1 0.47μH COUT 100μF s2 309k 3413 F01a L1: VISHAY DALE...