It’s a jellybean part, ideal for when you just need to add some 3.3V power in your circuit.

• Microchip MCP1700-3302E
• 3.3V, 250mA positive fixed voltage regulator
• 0.18V dropout at 250mA
• Only requires a single 1.0µF capacitor between Vout and GND (but a 1.0µF on input is a good idea)
• Pin assignments (viewed pins down; flat face toward you): 1 = Vout, 2 = GND, 3 = Vin
• TO92 through-hole transistor-like package