RT2857B Datasheet | Richtek

Description The RT2857B is a high efficiency, monolithic synchronous step-down DC-DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The RT2857B current-mode architecture with external pensation allows the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during startup. Fault condition protections include output over-current protection, output over-voltage protection, and overtemperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. Features - Low RDS(ON) Power MOSFET Switches 26mΩ/19mΩ - Input Voltage Range : 4.5V to 18V - Adjustable Switching Frequency : 200k Hz to 1.6MHz - Current-Mode Control - Synchronous to External Clock : 200k Hz to 1.6MHz - Accurate Voltage Reference  0.6V ± 1%, Over - 40°C to 85°C  0.6V ± 1.5%, Over - 40°C to 150°C - Monotonic Start-Up into Pre-biased Outputs - Adjustable Soft-Start - Power Good Indicator - Over-Current Protection - Over-Temperature and Over-Voltage Protection - Input Under-Voltage Lockout - Ro HS pliant and Halogen Free Applications - High Performance Point of Load Regulation - Notebook puters - High Density and Distributed Power Systems Simplified Application Circuit Enable PGOOD ROSC CSS BOOT PVIN PGOOD P RT/SYNC SS/TR CBOOT L RP1 CP2 R1 CP1 R2 VOUT...