General Description

The RT9470/D device are a highly-integrated 3A switch

mode battery charge management and system power

path management device for single cell Li-Ion and

Li-polymer battery. The low impedance power path

optimizes switch-mode operation efficiency, reduces

battery charging time and extends battery life during

discharging phase. The I2C serial interface with

charging and system settings makes the device a truly

flexible solution.

The recommended junction temperature range is

−40C to 150C, and the ambient temperature range is

−40C to 85C.

Applications

⚫ Smart Phone/Tablet PC

⚫ Personal Information Appliances

⚫ Portable Device and Accessory

Features

⚫ High Efficiency, 1.5MHz, Synchronous

Switch-Mode Buck Charger

 92% Charge Efficiency at 2A from 5V Input and

3.8V Battery

 Support 3.9V to 13.5V Input Voltage Range

 Average Input Current Regulation (AICR)

 Minimum Input Voltage Regulation (MIVR)

 Minimum Input Voltage Regulation Track (MIVR

Track)

 Charge Current Regulation (CCR)

 Charge Voltage Regulation (CVR)

 Charge Voltage Regulation Track (CVR Track)

 Junction Thermal Regulation (JTR)

⚫ Supports USB On-The-Go (OTG)

 92% Boost Efficiency at 1A with 3.8V Battery

and 5.15V Output

 OTG Current Limit Regulation (OCLR)

 OTG Voltage Limit Regulation (OVLR)

⚫ Protection

 Over-Temperature Protection (OTP)

 VBUS Over-Voltage Protection (VBUS OVP)

 Battery Over-Voltage Protection (VBAT OVP)

 System Over-Voltage Protection (VSYS OVP)

 System Under-Voltage Protection (VSYS UVP)

 System Over-Load Protection (VSYS OLP)

 Cycle-by-Cycle Over-Current Protection (OCP)

 OTG Low Battery Protection (OTG LBP)