Low-dropout linear regulator that delivers 200 mA at a fixed 3.3 V from a small SOT-23-5, drawing only about 31 uA of quiescent current so it barely loads a battery in standby. An EN pin shuts it to near zero, internal current limit and thermal shutdown protect it, and it needs only small ceramic input and output capacitors. A cheap, low-power point-of-load LDO for battery sensors and always-on subsystems.

Pinout

Pin	Name	Type	Function
1	IN	power_in	Unregulated input supply pin, 2.0 V to 5.5 V (absolute max 6 V). A 1-µF ceramic capacitor from IN to GND is recommended for stability and transient performance.
2	GND	power_in	Device ground reference pin.
3	EN	input	Enable input. Driving EN above 0.9 V turns the regulator on; driving EN below 0.4 V places the device into shutdown, reducing operating current to ~1 µA. Absolute max is VIN + 0.3 V or 6 V, whichever is less.
4	NC	unconnected	No internal connection. May be tied to GND to improve thermal dissipation.
5	OUT	power_out	Regulated 3.3-V output pin, 200-mA capable. Requires a 1-µF ceramic capacitor from OUT to GND for stability.

Key specifications

Parameter	Value
Type	Low-dropout regulator (LDO)
Output current	200 mA
Output	3.3 V (fixed)
Quiescent current	31 uA (typ)
Dropout	~165 mV at 200 mA
Enable	EN pin
Supply	1.6-6.5 V
Package	SOT-23-5

Ordering variants

Same part, different packaging or reel option.

TLV70033DDCR (3.3 V, SOT-23-5)
TLV70018DDCR (1.8 V)
TLV70025DDCR (2.5 V)

CAD (KiCad official)

Symbol: Regulator_Linear2:TLV70033_SOT23-5 (KiCad official)
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (42 pp, sha256 cc0628cd7013e6b2, retrieved 2026-08-17, tier: manufacturer)
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