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OB2273AMP

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by Ray

OB On Bright Elec AC-DC Controllers and Regulators, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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OB2273AMP

OB On Bright Elec · AC-DC Controllers and Regulators · SOT-23-6

OB2273AMP from OB On Bright Elec, in a SOT-23-6. 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 Ground reference for the IC. All internal circuitry and gate driver return currents flow through this pin.
2 FB input Feedback input pin. The PWM duty cycle is determined by the voltage level at this pin together with the current-sense signal at Pin 4 (CS). Internal input impedance ~16 kΩ; open-loop voltage typ. 4.2 V; burst-mode enter/exit thresholds ~1.175 V / 1.275 V; power-limit threshold ~3.7 V.
3 RT bidirectional Dual-function pin. Either connected through an NTC resistor to ground for over-temperature shutdown/latch control, or connected through a Zener to VDD for adjustable over-voltage protection. Sources ~100 uA out of the pin; OTP threshold ~1 V; external OVP threshold ~4 V; float voltage ~2.3 V.
4 CS input Current sense input. Senses the primary MOSFET switch current via an external sense resistor. Internal leading-edge blanking ~220 ns; internal current-limit threshold ~0.75 V (zero duty cycle); CS clamp ~0.9 V.
5 VDD power_in Power supply pin for the IC. Recommended operating range 12 V to 25 V. UVLO(ON) ~9 V, UVLO(OFF)/recovery ~15.3 V; internal VDD clamp ~32 V (10 mA); OVP threshold ~28 V (auto-recovery).
6 GATE output Totem-pole gate driver output for the external power MOSFET. Output clamp ~12 V; typical rise/fall times 175 ns / 85 ns into 1000 pF.

Key specifications

Parameter Value
Manufacturer OB On Bright Elec
Package SOT-23-6
Category PMIC
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • OB2273AMP

CAD (KiCad official)

  • Symbol: OB2273AMP
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: OB On Bright Elec datasheet (10 pp, sha256 65cbe58e5e31bd2a, 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