LTC3878 Datasheet | Linear Technology

Features n Wide VIN Range: 4V to 38V n ±1% 0.8V Voltage Reference n Extremely Fast Transient Response n t ON(MIN): 43ns n No RSENSE™ Valley Current Mode Control n Stable with Low ESR Ceramic COUT n Supports Smooth Start-Up Into Pre-Biased Output n Optimized for High Step-Down Ratios n Pin patible with the LTC1778 (No EXTVCC Pin) n Power Good Output Voltage Monitor n Dual N-Channel MOSFET Synchronous Drive n Adjustable Switching Frequency n Programmable Current Limit with Foldback n Output Overvoltage Protection n Small 16-Pin Narrow SSOP Package Applications n Distributed Power Systems n Embedded puting n munications Infrastructure L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 6100678, 6580258, 5847554, 6304066. Fast, Wide Operating Range No RSENSE Step-Down DC/DC Controller Description The LTC®3878 is a synchronous step-down switching DC/DC controller optimized for high switching frequency and fast transient response. The constant on-time valley current mode architecture allows for a wide input range, including very low duty factor operation. No external sense resistor or slope pensation is required. The LTC3878 is pin patible with the LTC1778 in applications that do not use EXTVCC while offering better efficiency. Consult with the factory to verify patibility. Operating frequency is set by an external resistor and pensated for variations in VIN to offer excellent line stability. Discontinuous mode operation provides high efficiency during light load conditions. A forced continuous control pin allows the user to reduce noise and RF interference. Safety Features include output overvoltage protection and programmable current limit with foldback. Soft-start capability for supply sequencing is...