MCP1703AT-2052E from Microchip Tech, in a SOT-23A-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	GND	power_in	Regulator ground. Tie GND to the negative side of the output and the negative side of the input capacitor. Only the LDO bias current (~2.0 µA typical) flows out of this pin; LDO output regulation is referenced to this pin, so minimize IR drops between GND and the load return.
2	VOUT	power_out	Regulated voltage output. Connect VOUT to the positive side of the load and the positive terminal of the output capacitor (1 µF to 22 µF ceramic recommended, ESR 0-2 Ω). This pin sources the DC load current up to 250 mA (VR ≥ 2.5 V) or 200 mA (VR < 2.5 V); typical short-circuit current is 400 mA.
3	VIN	power_in	Unregulated input supply, 2.7 V to 16.0 V absolute operating range (18 V absolute maximum). Bypass with a 1 µF ceramic capacitor equal to or larger than the output capacitor to ensure loop stability and provide energy during dynamic load steps. Low source impedance is required for stable LDO operation.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	SOT-23A-3
Category	Power Management (PMIC)
Pins	3

Ordering variants

Same part, different packaging or reel option.

MCP1703AT-2052ECB
MCP1703AT-2052EDB
MCP1703AT-2052EMB
MCP1703AT-2052E

CAD (KiCad official)

Symbol: MCP1703AT-2052E
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23A-3 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Microchip Tech datasheet (31 pp, sha256 ee4e9c3b0b2c09bb, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF