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XC9236A18CMR

Public Made by Adom

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Torex Semicon DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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XC9236A18CMR

Torex Semicon · DC-DC Converters · SOT-23-5

XC9236A18CMR from Torex Semicon, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Power input with an operating voltage range of 2.0V to 6.0V for the A type, and a bypass capacitor CIN should be connected as close as possible to the VIN and VSS pins.
2 VSS power_in Ground pin for the IC, which should be connected as close as possible to the VIN bypass capacitor and kept on thick, short PCB ground traces.
3 CE/MODE input High-active enable and mode selection pin, where a level above 0.65V and up to 6.0V enables operation in the PWM/PFM automatic switching mode and a level from 0V to 0.25V puts the IC in stand-by.
4 VOUT power_out Fixed output voltage pin for the A type, which sets the 1.8V output and enters high impedance during shutdown.
5 Lx output Switching output pin that drives the external coil, with high impedance in shutdown and no CL discharge path on the A type.

Key specifications

Parameter Value
Manufacturer Torex Semicon
Package SOT-23-5
Category Power Management ICs
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage VOUT 1.764 1.8 1.836 V When connected to external components, VIN=VCE=5.0V, IOUT=30mA 5
Operating Voltage Range VIN 2 6 V 5
Maximum Output Current IOUTMAX 600 mA VIN=VOUT(E)+2.0V, VCE=1.0V, When connected to external components (*9) 5
UVLO Voltage VUVLO 1 1.4 1.78 V VCE=VIN, VOUT=0V, Voltage which Lx pin holding L level (*1, *11) 5
Supply Current IDD 15 33 μA VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V 5
Stand-by Current ISTB 0 1 μA VIN=5.0V, VCE=0V, VOUT=VOUT(E)×1.1V 5
Oscillation Frequency fOSC 1020 1200 1380 kHz When connected to external components, VIN=VOUT(E)+2.0V, VCE=1.0V, IOUT=100mA 5
PFM Switching Current IPFM 120 160 200 mA When connected to external components, VIN=VOUT(E)+2.0V, VCE=VIN, IOUT=1mA (*12) 5
PFM Duty Limit DTYLIMIT_PFM 200 300 % VCE=VIN=(C-1), IOUT=1mA (*12) 5
Maximum Duty Cycle DTYMAX 100 % VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V 5
Minimum Duty Cycle DTYMIN 0 % VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V 5
Efficiency EFFI 92 % When connected to external components, VCE=VIN=VOUT(E)+1.2V, IOUT=100mA 5
Lx SW H ON Resistance 1 RLxH 0.35 0.55 VIN=VCE=5.0V, VOUT=0V, ILx=100mA (*3) 5
Lx SW H ON Resistance 2 RLxH 0.42 0.67 VIN=VCE=3.6V, VOUT=0V, ILx=100mA (*3) 5
Lx SW L ON Resistance 1 RLxL 0.45 0.65 VIN=VCE=5.0V (*4) 5
Lx SW L ON Resistance 2 RLxL 0.52 0.77 VIN=VCE=3.6V (*4) 5
Lx SW H Leak Current ILEAKH 0.01 1 μA VIN=VOUT=5.0V, VCE=0V, Lx=0V 5
Lx SW L Leak Current ILEAKL 0.01 1 μA VIN=VOUT=5.0V, VCE=0V, Lx=5.0V 5
Current Limit ILIM 900 1050 1350 mA VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V (*8) 5
Output Voltage Temperature Characteristics VOUT/(VOUT・△Topr) -100 100 ppm/°C IOUT=30mA, -40℃≦Topr 5
CE H Voltage VCEH 0.65 6 V VOUT=0V, Applied voltage to VCE, Voltage changes Lx to H level (*11) 5
CE L Voltage VCEL 0.25 V VOUT=0V, Applied voltage to VCE, Voltage changes Lx to L level (*11) 5
Soft Start Time tSS 0.5 1 2.5 ms When connected to external components, VCE=0V VIN, IOUT=1mA 5
Latch Time tLAT 1 20 ms VIN=VCE=5.0V, VOUT=0.8×VOUT(E), Short Lx at 1 resistance (*7) 5
Short Protection Threshold Voltage VSHORT 0.675 0.9 1.15 V Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1 resistance, VOUT voltage which Lx becomes L level within 1ms 5
VIN Pin Voltage VIN -0.3 6.5 V 4
Lx Pin Voltage VLx -0.3 V Maximum printed as VIN + 0.3 4
VOUT Pin Voltage VOUT -0.3 6.5 V 4
FB Pin Voltage VFB -0.3 6.5 V 4
CE/MODE Pin Voltage VCE -0.3 6.5 V 4
Lx Pin Current ILx -1500 1500 mA 4
Power Dissipation SOT-25 Pd 250 mW SOT-25 package 4
Operating Ambient Temperature Topr -40 85 °C 4
Storage Temperature Tstg -55 125 °C 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin (2) Sn-AG-Cu is used for the package terminals. If eutectic solder is used, mounting reliability is decreased. Please do not use eutectic solder paste. 20

CAD (KiCad official)

  • Symbol: XC9236A18CMR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: xc9236a18cmr-etched.step / xc9236a18cmr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xc9236a18cmr.step / xc9236a18cmr.glb are the bare package body.

Provenance

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

  • Datasheet: Torex Semicon datasheet (34 pp, sha256 8d285a7b969f3d97, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF