RT7257GHZSP Datasheet PDF - Richtek

●General Description

●The RT7257G 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 RT7257G"s current mode architecture and external compensation allow the transient response to be optimized over a wide input voltage range and loads. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7257G also provides under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7257G is available in an SOP-8 (Exposed Pad) package.

●Features

●±1.5% High Accuracy Reference Voltage

●4.5V to 18V Input Voltage Range

●3A Output Current

●Integrated N-MOSFET Switches

●Current Mode Control

●Fixed Frequency Operation : 800kHz

●Output Adjustable from 0.8V to 12V

●Up to 95% Efficiency

●Programmable Soft-Start

●Stable with Low ESR Ceramic Output Capacitors

●Cycle-by-Cycle Current Limit

●Input Under Voltage Lockout

●Output Under Voltage Protection

●Thermal Shutdown Protection

●RoHS Compliant and Halogen Free

●Applications

●Wireless AP/Router

●Set-Top-Box

●ndustrial and Commercial Low Power Systems

●LCD Monitors and TVs

●Green Electronics/Appliances

●Point of Load Regulation of High-Performance DSPs