LTC1736 Datasheet | Linear Technology

LTC1736 5-Bit Adjustable High Efficiency Synchronous Step-Down Switching Regulator Features s s s s DESCRIPTIO s s s s s s s s s s s U APPLICATIO S s s Dual N-Channel MOSFET Synchronous Drive Synchronizable/Programmable Fixed Frequency Wide VIN Range: 3.5V to 36V Operation 5-Bit Digital-to-Analog VOUT Selection: 0.925V to 2.00V Range with 50m V/25m V Steps OPTI-LOOPTM pensation Minimizes COUT ±1% Output Voltage Accuracy Power Good Output Voltage Monitor Active Voltage Positioning patible Output Overvoltage Crowbar Protection Internal Current Foldback Latched Short-Circuit Shutdown Timer with Defeat Option Forced Continuous Control Pin Optional Programmable Soft-Start Remote Output Voltage Sense Available in 24-Lead SSOP Package The LTC®1736 is a synchronous step-down switching regulator controller optimized for CPU power. The output voltage is programmed by a 5-bit digital-to-analog converter (DAC) that adjusts the output voltage from 0.925V to 2.00V according to Intel mobile VID specifications. The 0.8V reference is patible with future microprocessor generations. The operating frequency (synchronizable up to 500k Hz) is set by an external capacitor allowing maximum flexibility in optimizing efficiency. The output voltage is monitored by a power good window parator that indicates when the output is within 7.5% of its programmed value. Protection Features include: internal foldback current limiting, output overvoltage crowbar and optional short-circuit shutdown. Soft-start is provided by an external capacitor that can be used to properly sequence supplies. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 30V (36V maximum). Pin defeatable Burst Mode TM operation provides high efficiency at low load currents. OPTI-LOOP pensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. s Notebook and Palmtop...