Richtek has introduced the RT9470G, which is a highly integrated 3 A switch mode battery charge management and system power path management device to enable single-cell Li-Ion and Li-polymer batteries. It has a low-impedance power path that optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during discharging phase. The I²C serial interface integrated with the charging and system settings makes this device a truly flexible solution.

Key features

High Efficiency, 1.5 MHz, Synchronous Switch-Mode Buck Charger

• 92% Charge Efficiency at 2 A from 5 V Input and 3.8 V Battery
• Support 3.9 V to 13.5 V 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 1 A with 3.8 V Battery and 5.15 V 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)

Key applications

• Smart Phone/Tablet PC
• Personal Information Appliances
• Portable Device and Accessory