The LM5156x (LM5156 and LM51561) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies. The LM5156x device can start up from a 1-cell battery with a minimum of 2.97V if the BIAS pin is connected to the VCC pin. This device can operate with the input supply voltage as low as 1.5V if the BIAS pin is greater than 3.5V.