FSA5157

The FSA5157 is a low ON Resistance, low power Single PoleDouble Throw (SPDT) analog switch. This product has beendesigned for switching audio signals in applications such as cellphones and portable media players. The ultra-low 0.4 Ohmimpedance, sub 1A current consumption, and 1.65V to 4.3Voperating voltage range makes this product ideal for batterypower applications. The FSA5157 also features bi-directionaloperation and make-before-break functionality. FSA5157 isfully specified for operation at 1.8V, 2.5V and 3.3V.

A growing number of applications require the voltage applied tothe select input to be lower then the V_CC applied. Under thiscondition, most switches would typically consume over 100Aof current. This would be an unacceptable level for battery poweredapplications. The FSA5157 has been designed to minimizecurrent consumption under this condition. The I_CCT is specifiedfor <2A under a worse case condition of V_CC = 4.3V and V_IN = 1.8V.