TI news:

The TLV1117 is a positive low-dropout voltage regulator designed to provide up to 800 mA of output current.

The device is available in 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V, and adjustable-output voltage options.

All internal circuitry is designed to operate down to 1-V input-to-output differential. Dropout voltage is specified at a maximum of 1.3 V at 800 mA, decreasing at lower load currents.

http://www.ti.com/product/tlv1117?sp_rid_pod4=OTQ4MTM1NzE3OAS2&sp_mid_pod4=39219235