RT2852BH/RT2852BH 3A, 18V, Synchronous Step-Down Converter

The RT2852BH is a high efficiency, monolithic synchronous step-down DC-DC converter that can deliver up to 3A output current from a 4.5V to 18V input supply. The RT2852BH current-mode architecture with external compensation 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 start-up. Fault condition protections include output under-voltage protection, output over-voltage protection, and over-temperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.

Applications

High Performance Point of Load Regulation

Notebook Computers

High Density and Distributed Power Systems

Features

Low RDS(ON) Power MOSFET Switches 46mΩ/36mΩ

Input Voltage Range : 4.5V to 18V

Adjustable Switching Frequency : 200kHz to 1.2MHz

Current-Mode Control

Synchronous to External Clock : 200kHz to 1.2MHz

Accurate Voltage Reference 0.8V ± 1.25%, Over -40°C to 105°C

Monotonic Start-Up into Pre-biased Outputs

Adjustable Soft-Start

Power Good Indicator

Under-Voltage and Over-Voltage Protection

Input Under-Voltage Lockout