component

TMI3286B

Public Made by Adom

by adom

TMI DC-DC Converters, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TMI3286B

TMI · DC-DC Converters · ESOP-8

TMI3286B from TMI, in a ESOP-8. 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 BS passive Bootstrap pin; a capacitor connected between LX and BS is required to form a floating supply across the high-side switch driver.
2 VIN power_in Power supply pin; recommended input voltage range is 4.5 V to 18 V.
3 LX output Switching pin; absolute maximum voltage is -0.3 V to 20 V, with transients under 10 ns limited to -4.5 V to 22 V.
4 GND power_in Ground pin.
5 FB input Output voltage feedback input; connect to the center point of the external resistor divider, with absolute maximum voltage of -0.3 V to 6 V.
6 NC unconnected No connection.
7 EN input Drive to logic-high to enable the IC and to logic-low to disable it into micro-power shutdown mode; do not leave EN floating.
8 NC unconnected No connection.
9 Thermal Pad power_in Exposed thermal pad; connect to ground with PCB vias for thermal dissipation.

Key specifications

Parameter Value
Manufacturer TMI
Package ESOP-8
Category Power Management (PMIC)
Pins 9

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 Voltage, EN -0.3 20 V 2
LX Voltages -0.3 20 V 2
LX Voltage (<10ns transient) -4.5 22 V <10ns transient 2
FB Voltage -0.3 6 V 2
BS Voltage -0.3 23 V 2
Storage Temperature Range -65 150 °C 2
Junction Temperature 160 °C Note 2 2
Power Dissipation 1500 mW 2
Lead Temperature (Soldering) 260 °C Soldering, 10s 2
ESD Human Body Model (all pins) VESD_HBM -2000 2000 V JEDEC JS-001 3
ESD Charged Device Model (all pins) VESD_CDM -2000 2000 V JEDEC JS-001 3
Voltage Range IN 4.5 18 V 3
Operating Junction Temperature TJ -40 125 °C 3
Feedback Voltage of TMI3286B VFB 0.906 0.925 0.942 V TA=25°C 4
Shutdown Current 5 10 μA VIN=12V, EN=0V 4
High-Side Switch Leakage Current 1 10 μA VEN=0V, VLX=0V 4
Oscillation Frequency 370 500 650 kHz 4
On Time 150 200 250 ns VIN=12V, VOUT=1.2V, IOUT=1A 4
Soft Start Time 0.7 1 1.3 ms 4
EN High-Level Input Voltage 0.85 1.05 1.2 V 4
Quiescent Current 300 μA VEN=2V, VFB=VREF x 105% 4
UVLO Rising Threshold 4 V 4
UVLO Hysteresis 0.45 V 4
OVP Threshold 19.3 V 4
High-Side Switch On-Resistance 60 mΩ 4
Low-Side Switch On-Resistance 35 mΩ 4
Switch Valley Current Limit 4.5 A Minimum Duty Cycle 4
Maximum Duty Cycle 80 % 4
Minimum On-Time 80 ns 4
Hiccup on Time 1.6 ms 4
Hiccup Time Before Restart 6 ms 4
EN Hysteresis 100 mV 4
Thermal Shutdown Threshold 165 °C Guaranteed by design (Note 4) 4
Thermal Shutdown Hysteresis 30 °C Guaranteed by design (Note 4) 4
Junction-to-ambient thermal resistance θJA 60 °C/W JESD51-7, 4-layer PCB (Note 3) 3
Junction-to-case (bottom) thermal resistance θJC 9 °C/W 3

CAD (KiCad official)

  • Symbol: TMI3286B
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)
  • 3D model files: tmi3286b-etched.step / tmi3286b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmi3286b.step / tmi3286b.glb are the bare package body.

Provenance

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

  • Datasheet: TMI datasheet (17 pp, sha256 d75092d658528c31, retrieved 2026-10-17, 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