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CJ9112T6A

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Changjing DC-DC Converters, SOT-23-6L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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CJ9112T6A

Changjing · DC-DC Converters · SOT-23-6L

CJ9112T6A from Changjing, in a SOT-23-6L. 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 SW passive Switch node. Drain of the internal N-channel boost switch and source of the synchronous P-channel rectifier. Connects to the external boost inductor (typ. 4.7 µH) whose other end ties to VIN. Rated -0.3 V to 6 V.
2 GND power_in Device ground and reference for all internal voltages. Tie directly to the system ground plane close to the input and output capacitor return terminals.
3 VFB input Feedback voltage input to the internal error amplifier. Connects to the mid-point of an external resistor divider from VOUT to GND. Regulated to VFB = 1.215 V (typ., 1.179 V-1.251 V). Feedback input bias current is ~10 nA.
4 EN input Enable control input. Logic high (>=70% of VIN) turns the converter on; logic low (<=20% of VIN) puts the device into shutdown. In shutdown the 'A' variant provides true load disconnect (VOUT = 0 V). EN input leakage ~5 nA at VEN=5 V. Do not float.
5 VOUT power_out Boost converter output and sense pin for the internal synchronous P-channel rectifier. Adjustable 1.8 V to 5.5 V via external feedback divider. Requires an external output capacitor (typ. 10 µF ceramic). Also supplies internal circuitry once VOUT > VIN.
6 VIN power_in Input supply pin (battery input). Operating range 0.82 V to 5.5 V after start-up (start-up threshold 0.82 V @ 1 mA load; minimum operating 0.65 V). Absolute maximum 6 V. Bypass with a local ceramic capacitor (typ. 4.7 µF).

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-23-6L
Category PMIC
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • CJ9112T6A
  • CJ9112T6B

CAD (KiCad official)

  • Symbol: CJ9112T6A
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6L (KiCad packages3D, STEP)
  • 3D model files: cj9112t6a-etched.step / cj9112t6a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj9112t6a.step / cj9112t6a.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (9 pp, sha256 1fbd0a963e871d48, 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