GENERAL DESCRIPTION

The SGM66099B is an ultra-low quiescent current synchronous Boost converter. 1.15V to 5.2V operation input voltage is suitable for Li-Mn battery, NiMH and Li-Ion rechargeable batteries. The 1.7μA (TYP) quiescent current maximizes the light load efficiency and also increases the effective battery operation time. In addition, the high-side synchronous rectifier provides output disconnect feature which minimizes unnecessary current drawn from the battery during shutdown mode.

The SGM66099B is able to deliver 300mA output current from 3.3V to 5V conversion, and achieves up to 93 efficiency at 200mA load.

The device provides down mode where the desired output voltage is regulated even when input voltage is higher than the output. In addition, when the input voltage is 300mV above the output voltage set point, the device enters pass-through mode.

The device integrates various protection features such as over-current protection, over-voltage protection and thermal shutdown. In addition, the synchronous rectifier supports short circuit protection which further improves the robustness of the device.

The SGM66099B provides both adjustable output voltage and fixed output voltage versions. It is available in Green WLCSP-1.22×0.83-6B and TDFN-2×2-6AL packages.

FEATURES

● Operating Input Voltage Range: 1.15V to 5.2V

● Ultra-Low Quiescent Current

? 1.7μA (TYP) Ultra-Low IQ into VOUT Pin

? 0.05μA (TYP) Ultra-Low IQ into VIN Pin

● 1.2MHz Fixed Frequency Operation

● Adjustable Output Voltage from 2.5V to 5.2V

● 5.0V Fixed Output Voltage Version

● Power-Save Mode for Improved Efficiency at Low Output Power

● Regulated Output Voltage in Down Mode

● True Disconnection During Shutdown

● Up to 93 Efficiency from 10mA to 300mA Load

● -40℃ to +85℃ Operating Temperature Range

● Available in Green WLCSP-1.22×0.83-6B and

TDFN-2×2-6AL Packages

APPLICATIONS

LCD Bias

Optical Heart Rate Monitor LED Bias

Portable and Wearable Applications

Low Power Wireless Applications

Battery Powered Systems