CS51411, CS51412,CS51413, CS514141.5 A, 260 kHz and 520 kHz,Low Voltage Buck Regulators with External Bias or Synchronization Capability The CS5141X products are 1.5 A buck regulator ICs. These devices are fixed-frequency operating at 260 kHz and 520 kHz. The regulators use the V2™ control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today\'s high-speed logic. These products accommodate input voltages from 4.5 V to 40 V. The CS51411 and CS51413 contain synchronization circuitry. The CS51412 and CS51414 have the option of powering the controller from an external 3.3 V to 6.0 V supply in order to improve efficiency, especially in high input voltage, light load conditions. The The on-chip NPN transistor is capable of providing a minimum of1.5 A of output current, and is biased by an external “boost” capacitorto ensure saturation, thus minimizing on-chip power dissipation.Protection circuitry includes thermal shutdown, cycle-by-cyclecurrent limiting and frequency foldback. The CS51411 and CS51413are functionally pin-compatible with the LT1375. The CS51412 andCS51414 are functionally pin-compatible with the LT1376.Features• V2 Architecture Provides Ultrafast Transient Response, ImprovedRegulation and Simplified Design• 2.0% Error Amp Reference Voltage Tolerance• Switch Frequency Decrease of 4:1 in Short Circuit ConditionsReduces Short Circuit Power Dissipation• BOOST Lead Allows “Bootstrapped” Operation to MaximizeEfficiency• Sync Function for Parallel Supply Operation or Noise Minimization• Shutdown Lead Provides Power-Down Option• 85 A Quiescent Current During Power-Down• Thermal Shutdown• Soft-Start• Pin-Compatible with LT1375 and LT1376• Pb-Free Packages are Availablecs51413/cs51414Chinese Data PDF
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