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ZTL431AQFTA

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Diodes Incorporated Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ZTL431AQFTA

Diodes Incorporated · Voltage Reference · SOT-23

ZTL431AQFTA from Diodes Incorporated, in a SOT-23. 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 Cathode passive Cathode (VKA) of the shunt regulator, which sinks 1mA to 100mA continuous (150mA absolute max) and has a maximum rating of 20V relative to the anode.
2 Ref input Reference input that sets the output voltage via an external divider, with a nominal VREF of 2.5V and input current rated -50µA to +10mA.
3 Anode passive Anode of the shunt regulator, the reference pin for all stated voltages, normally connected to ground.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23
Category Power Management (PMIC)
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Cathode Voltage (VKA) - recommended, max VKA 20 V 2
Cathode Current (IKA) - recommended, min IKA 1 mA 2
Cathode Current (IKA) - recommended, max IKA 100 mA 2
Operating Ambient Temperature Range - min TA -40 °C 2
Operating Ambient Temperature Range - max TA 125 °C 2
Cathode Voltage (VKA) VKA 20 V Voltages relative to Anode pin 2
Continuous Cathode Current IKA 150 mA 2
Reference Input Current Range - lower limit IREF -50 µA 2
Reference Input Current Range - upper limit IREF 10 mA 2
Operating Junction Temperature - min TJ -40 °C 2
Operating Junction Temperature - max TJ 150 °C 2
Storage Temperature - min TSTG -55 °C 2
Storage Temperature - max TSTG 150 °C 2
ESD Human Body Model (HBM) 2 kV HBM 2
ESD Machine Model (MM) 200 V MM 2
ESD Charged Device Model (CDM) 1 kV CDM 2
Junction-to-ambient thermal resistance (SOT23) θJA 380 °C/W SOT23 package 2
Power dissipation (SOT23) PDIS 260 mW TA = +25°C, TJ = +125°C; SOT23 package 2
Reference Voltage (A grade) VREF 2.475 2.5 2.525 V VKA = VREF, IKA = 10mA 2
Deviation of Reference Voltage over full temperature range VDEV 6 16 mV VKA = VREF, IKA = 10mA, TA = 0°C to +70°C 2
Deviation of Reference Voltage over full temperature range VDEV 14 34 mV VKA = VREF, IKA = 10mA, TA = -40°C to +85°C 2
Ratio of change in Reference Voltage to change in Cathode Voltage VREF/VKA -1.4 -2.7 mV/V IKA = 10mA, VKA = VREF to 10V 2
Ratio of change in Reference Voltage to change in Cathode Voltage VREF/VKA -1 -2 mV/V IKA = 10mA, VKA = 10V to 20V 2
Reference Input Current IREF 2 4 µA IKA = 10mA, R1 = 10kΩ, R2 = open 2
IREF Deviation over full temperature range IREF 0.8 1.2 µA IKA = 10mA, R1 = 10kΩ, R2 = open, TA = 0°C to +70°C 2
IREF Deviation over full temperature range IREF 0.8 2.5 µA IKA = 10mA, R1 = 10kΩ, R2 = open, TA = -40°C to +85°C 2
Minimum Cathode Current for Regulation IKA(MIN) 0.4 0.6 mA VKA = VREF 2
Off-State Current IKA(OFF) 0.1 0.5 µA VKA = 20V, VREF = 0V 2
Dynamic Output Impedance RZ 0.2 0.5 Ω VKA = VREF, f = 0Hz 2

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 • Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 • Weight: 9

CAD (KiCad official)

  • Symbol: ZTL431AQFTA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ztl431aqfta-etched.step / ztl431aqfta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ztl431aqfta.step / ztl431aqfta.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (10 pp, sha256 cdce6243fdbe09dd, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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