Einer von denen ?
AA9 XC6211A402MR Torex SOT23-5 LDO, CE, int. pull-dwn res., 4V±2%,
240mA
AA9 XC6211E402MR Torex SOT23-5 LDO, CE, int. pull-dwn res., 4V±2%,
300mA
AA9? XC6114B640MR Torex SOT23-5 VDet 4.0V, ±Reset PPO, Wt=1.6s,
Rt=25ms
AA TC1016-1.8 Microchip SC70-5 80mA, Tiny CMOS LDO With Shutdown
http://www.mouser.com/ds/2/268/21666a-65575.pdf
AA µPA501T Nec SOT23-5 Dual, 60V, 100mA, 180MHz
AA µPA571T Nec SOT23-5 Dual, 60V, 100mA, 180MHz
AA 74AHC1G00GW NXP SOT353-1 PicoGate
https://www.electronicspoint.com/threads/top-markings-for-those-tiny-smd-5-pin-sc70-package-logic-devices.99563/
AA PI74ST1G125 Pericom SOT23-5,SC70-5
https://www.diodes.com/assets/Packaging-Support-Docs/partmarkingordering.pdf
AA PI74ST1G125CX Pericom SC70-5 Noninverting 3-State Buffer
AA PI74ST1G125TX Pericom SOT23-5 Noninverting 3-State Buffer
AA 74AHC1G00 Philips SOT353 2-input NAND gate
AA RN5RT20AA Ricoh SOT23-5 LDO, -CE, 2V±2%, 150mA
AA SiP823LEU Vishay SOT23-5 Voltage Detector 4,63V, MR, Strobe,
-Reset Push-pull output