General Description

The ET8290B is a high-efficiency, synchronous, current-mode, step-up converter with output disconnection.The ET8290B starts up from an input voltage as low as 1.9V, while providing inrush current limiting and output short-circuit protection. The integrated P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode. This P-channel disconnects the output from the input during shutdown. The 1.0MHz switching frequency allows small external components, while the internal compensation and

soft-start minimize external component count. The ET8290B provides a compact solution for a 5V output, 3.1A load requirement, using a supply voltage down to 2.8V.

The ET8290B is available in QFN14 2mm*2mm package.

Features

● Up to 98% Efficiency

● 1.9V to 5.5V Input Range

● Adjustable Output Voltage from 2.5V to 5.0V

● Internal Synchronous Rectifier

● 1.0MHz Fixed Switching Frequency

● 9A Typical Switch Current Limit

● 43uA Quiescent Current

● High Efficiency over Full Load Range

● Internal Soft-start and Compensation

● True Output Load Disconnect from Input

● OCP, SCP, OVP and OTP Protection

Application

● Battery-Powered Products

● Power Banks, Juice Packs, Battery Back-up Units

● USB Power Supply

● Consumer Electronic Accessories

ET8290B‘s pin assignment is fully compatible with MP3423 & MP3422.

Specification Download: ET8290B_Datasheet.pdf