LTC3833 Datasheet | Linear Technology

Features n Wide VIN Range: 4.5V to 38V n VOUT Range: 0.6V to 5.5V n Output Accuracy: ±0.25% at 25°C and ±0.67% over Temperature n Differential Output Sensing Allowing Up to 500m V Line Loss n Fast Load Transient Response nt ON(MIN) = 20ns, t OFF(MIN) = 90ns n Controlled On-Time Valley Current Mode Architecture n Frequency Programmable from 200k Hz to 2MHz and Synchronizable to External Clock n RSENSE or Inductor DCR Current Sensing n Overvoltage Protection and Current Limit Foldback n Power Good Output Voltage Monitor n Output Tracking or Adjustable Soft-Start n External VCC Input for Bypassing Internal LDO n 20-Pin QFN (3mm × 4mm) and TSSOP Packages APPLICATIONS n Distributed Power Systems n Point-of-Load Converters n puting Systems n Datam Systems LTC3833 Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing DESCRIPTION The LTC®3833 is a synchronous step-down DC/DC switching regulator controller targeted for high power applications. It drives all N-channel power MOSFETs. The controlled on-time valley current mode architecture allows for both fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUT and load current. Differential output voltage sensing along with a precision internal reference bine to offer ±0.67% output regulation and the ability to correct for up to ±500m V variations in the output terminals due to line losses. The operating frequency can be programmed from 200k Hz to 2MHz with an external resistor and can be synchronized to an external clock for noise and EMI sensitive applications. Very low t ON and t OFF times allow for near 0% and near 100% duty cycles, respectively. Programmable soft-start or output voltage tracking is available. Safety Features include output overvoltage protection, programmable current limit with foldback, and a power good output signal. L, LT, LTC, LTM, OPTI-LOOP, Poly Phase, µModule, Linear Technology and the Linear logo are...