component

TMI3408

Public Made by Adom

by adom

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

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TMI3408

TMI · DC-DC Converters · SOT-23-5

TMI3408 from TMI, 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 EN input Chip Enable Pin; do not leave EN floating.
2 GND power_in Ground Pin.
3 LX output Power Switch Output, the switch node connection to the inductor.
4 VIN power_in Power Supply Input; must be closely decoupled to GND with a 4.7µF or greater ceramic capacitor.
5 FB input Output Voltage Feedback Pin.

Key specifications

Parameter Value
Manufacturer TMI
Package SOT-23-5
Category Power Management (PMIC)
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
Input Supply Voltages -0.3 6.5 V 2
LX Voltages -0.3 6.5 V 2
EN, FB Voltage -0.3 6.5 V 2
LX Voltage (<10ns transient) -2.5 7 V <10ns transient 2
LX Voltage (<5ns transient) -3.5 7.5 V <5ns transient 2
Storage Temperature Range -65 150 °C 2
Junction Temperature -40 155 °C Note 2 2
Power Dissipation (SOT23-5) 650 mW SOT23-5 2
Lead Temperature Soldering 260 °C 10 sec 2
Human Body Model ESD for all pins VESD_HBM -2000 2000 V JEDEC JS-001 3
Charger Device Model ESD for all pins VESD_CDM -1000 1000 V 3
Voltage Range VIN VIN 2.5 5.5 V 3
TJ Operating Junction Temperature Range TJ -40 125 °C 3
Junction-to-ambient thermal resistance θJA 200 °C/W SOT23-5, JESD51-7 4-layer PCB 3
Junction-to-board thermal resistance θJB 36 °C/W SOT23-5 3
Junction-to-case thermal resistance θJC 60 °C/W SOT23-5 3
Input Voltage Range 2.5 5.5 V 4
Quiescent Current 40 65 µA VEN=2.0V, VOUT=1.2V 4
Shutdown Current 0.1 10 µA VEN =0V 4
Regulated Feedback Voltage 0.588 0.6 0.612 V TA = 25°C 4
Reference Voltage Line Regulation 0.04 0.4 %/V VIN = 2.5V to 5.5V 4
Output Voltage Line Regulation 0.04 0.4 % VIN = 2.5V to 5.5V 4
Oscillation Frequency 1.2 1.5 1.8 MHz VOUT=100% 4
On Resistance of PMOS 0.25 0.3 Ω ILX=100mA 4
On Resistance of NMOS 0.1 0.15 Ω ILX=-100mA 4
Peak Current Limit 1.5 2.4 A VIN=5V, VOUT=1.2V, L=4.7μH/2A 4
EN Rising Threshold 0.8 1.1 1.4 V Rising 4
EN Falling Threshold 0.6 0.9 1.2 V Falling 4
EN Leakage Current -1 0.01 1 µA 4
LX Leakage Current -1 0.01 1 µA VEN=0V, VIN=VLX=5V 4
OVP Threshold 6 V 4
UVLO Threshold 2.3 V 4
Oscillation Frequency 300 kHz VOUT=0V 4
Soft-start time 0.5 ms 4
Output Voltage Load Regulation 0.5 % 4
Thermal Shutdown Threshold 150 °C Note 4 4
Thermal Shutdown Hysteresis 25 °C Note 4 4

CAD (KiCad official)

  • Symbol: TMI3408
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: tmi3408-etched.step / tmi3408-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmi3408.step / tmi3408.glb are the bare package body.

Provenance

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

  • Datasheet: TMI datasheet (15 pp, sha256 46d5f1a0e9da8af5, retrieved 2026-10-20, 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