Battery-charger controller
max. 750 mA Summit Microelectronics

The SMB136 is a programmable single-cell lithium-ion / lithium-polymer battery charger designed for a variety of portable applications. The device provides a simple and efficient way to charge high-capacity Li-Ion batteries via a USB or AC power source. Unlike conventional charging devices, the SMB136’s high-efficiency switch-mode operation eliminates the low charge current and thermal problems of conventional linear solutions. Also the switching architecture in conjunction with programmability enables dramatically faster charging – TurboCharge™ mode - from current limited inputs such as USB.

Also the SMB136 can manage two outputs independently: battery charging and system power. This allows immediate system operation even under missing/deeply discharged battery conditions. In the case of a low battery and insufficient/missing input supply the SMB136 can run its switching regulator in reverse to support “Low Battery Recovery” mode (+4.17V @ 500mA) or USB “On the Go” power (+5.0V @ 500mA).