Richtek RT2805A | Demoboard RT2805AGSP

Description

The RT2805A is a current mode asynchronous step-down converter that achieves excellent load and line regulation.Over a wide input voltage range from 5.5V to 36V and supports output current up to 5A. The Current mode operation provides fast transient response and eases loop stabilization. An adjustable soft-start reduces the stress on the input source at start up. In shutdown mode, the regulator draws only 25μA of supply current. The RT2805A requires a minimum number of readily available external components, providing a compact solution. The RT2805A provides protection functions inducing input under voltage lockout, cycle-by-cycle current limit, short circuit protection and thermal shutdown protection. The RT2805A is available in the SOP-8 (Exposed Pad) package.

Features

• 5A Output Current
• Wide Operating Input Range 5.5V to 36V
• Adjustable Output Voltage from 1.222V to 26V
• High Efficiency up to 90%
• Internal Compensation Minimizes External Parts Count
• Internal Soft-Start
• 110mΩ Internal Power MOSFET Switch
• 25μA Shutdown Mode
• Fixed 500kHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Current Limit
• Available In an SOP-8 (Exposed Pad) Package
• RoHS Compliant and Halogen Free

Typical applications

• Battery Charger
• Distributive Power Systems
• DSL Modems
• Pre-regulator for Linear Regulators

More information

• Datasheet
• IC product information