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OB3636MP

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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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Datasheet

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Contents

README

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OB3636MP

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

OB3636MP 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 FB input Voltage feedback from auxiliary winding. Connected to a resistor divider from the auxiliary winding reflecting output voltage. Also used for quasi-resonant valley detection (triggers a new PWM cycle when FB falls below ~0V) and for open/short protection (open at FB>~3.2V, short at FB<~0.4V).
2 GND power_in Power ground reference for the IC. Return for VDD supply, CS sense resistor, CMP compensation capacitor, and FB divider.
3 VDD power_in Power supply pin. Abs max -0.3 to 40V. UVLO enter (VDD falling) ~8V, UVLO exit (VDD rising) ~22.5V, VDD OVP ~32V. Standby current ~3uA, operating current ~850uA at 20V.
4 GATE output Gate driver output for the external power MOSFET. Push-pull output with built-in 12V clamp to protect MOSFET gate. Voh ~6V, Vol ~1V, rise/fall ~80ns/30ns into 1nF. Abs max -0.3 to 40V.
5 CS input Current sense input. Connected to the MOSFET source through an external sense resistor to GND. Cycle-by-cycle OCP threshold ~1.1V (Ton>=10us) / ~0.7V (Ton=0us), with 300ns internal leading edge blanking. Abs max -0.3 to 7V.
6 CMP output Loop compensation pin, internally driven by the gm error amplifier output (Gm ~40uS, Vref 2.5V). An external capacitor between CMP and GND sets the low-frequency (<20Hz) loop bandwidth. Internal clamp ~0.8V. Abs max -0.3 to 7V.

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.

  • OB3636MP

CAD (KiCad official)

  • Symbol: OB3636MP
  • 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 306ebcfe46ca64b8, 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