# ETA9640 - 5V/1A Synchronous Boost with 1A Linear Charger for Power Bank

## DESCRIPTION & FEATURES

· Integrated Power Management: Designed for Power Bank, Mobile Charger, and Backup Battery Charger applications.
· Dual Functionality: Combines a synchronous step-up boost converter and a linear battery charger.
· Boost Converter:
- Provides up to 1A output current at 5V from a Li-Ion battery.
- Incorporates input-output disconnection during shutdown, short-circuit, or overload.
- Up to 96% efficiency during boosting.
· Linear Battery Charger:
- Charges up to 1A current from an AC adapter input.
· Key Features:
- Short-circuit protection
- Boost output to input reversed current protection
- Programmable charging current
- Low quiescent current: 100μA
- Eliminates need for external MOSFET and microcontroller.
· Package: ESOP-8

## APPLICATIONS

· Portable Power Bank
· Portable 3G/4G WiFi Hotspot
· Tablet PC
· Portable Device power with Li-ion battery and USB output

## ORDERING INFORMATION

PART	PACKAGE	PIN	TOP MARK
ETA9640E8A	ESOP-8	-	ETA9640<br>YWWPL (Date Code)

## TYPICAL APPLICATION CIRCUIT

· Includes components for Li-Ion battery connection, USB output, and charging indication.
· Requires external components: 2.2-4.7uH inductor, 1nF capacitor, 47K resistor, 10K resistor, 10uF capacitor, 1.2K Mini USB.