component

TPS62203

Public Unreviewed

by Ray

TI 300 mA synchronous step-down converter, SOT-23-5. 2.5-6 V in, 1 MHz, power-save mode. Datasheet-verified.

componentpowerbuck-converterswitching-regulatordc-dcsot-23-5texas-instruments
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TPS62203

Texas Instruments · Switching regulator (buck) · SOT-23-5

Small synchronous buck converter that steps a 2.5 to 6 V input down to a regulated rail at up to 300 mA, in a five-pin SOT-23. Both switches are integrated and it runs near 1 MHz, so the inductor and capacitors are tiny, and a power-save mode keeps efficiency high at light load for battery use. A resistor divider at FB sets the output and EN shuts it down. A compact point-of-load supply for a single sensor or subsystem.

Pinout

Pin Name Type Function
1 VI power_in Supply voltage input pin. Recommended operating range 2.5 V to 6 V (absolute max 7 V). Requires a >=4.7 µF ceramic input capacitor to GND close to the pin.
2 GND power_in Device ground. All voltage measurements are referenced to this pin.
3 EN input Enable input. Pulling this pin to GND forces the device into shutdown. Pulling to VI enables the device. Must not be left floating and must be terminated.
4 FB input Feedback pin. For the fixed-output-voltage version (TPS62203 = 1.8 V fixed), connect FB directly to the output. For the adjustable version an external resistor divider sets Vout; the internal divider is disabled in that mode.
5 SW output Switch node. Connect the external inductor (typ. 10 µH) between this pin and the output. Internally connected to the high-side and low-side MOSFET switches.

Key specifications

Parameter Value
Type Synchronous step-down converter
Input 2.5-6 V
Output current 300 mA
Switching freq 1 MHz
Integrated FETs Yes
Light load Power-save mode
Package SOT-23-5

Ordering variants

Same part, different packaging or reel option.

  • TPS62200DBVR (fixed variants)

The extractor listed these alongside TPS62203, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • TPS62203DBVR (adjustable, SOT-23-5)

CAD (KiCad official)

  • Symbol: Regulator_Switching:TPS62203DBV (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 (30 pp, sha256 f6ac7e529beda007, 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