component

TMI3252T

Public Made by Adom

by adom

TMI DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TMI3252T

TMI · DC-DC Converters · SOT-23-6

TMI3252T from TMI, in a SOT-23-6. 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 GND power_in Ground pin; the datasheet recommends connecting GND to a large copper area to cool the chip and improve thermal performance.
2 LX output Switching pin connecting the inductor to the internal high-side and low-side power MOSFETs; keep LX away from sensitive analog areas such as FB.
3 IN power_in Power supply pin with a recommended input voltage range of 4.5 V to 18 V; place bypass ceramic capacitors close to this pin.
4 FB input Output voltage feedback input that connects to the center point of the external resistor divider; the TMI3252T regulated feedback voltage is 0.750 V min, 0.765 V typ, 0.780 V max.
5 EN input Enable input: drive to logic-high (at least 1.5 V) to enable the IC, drive to logic-low (at most 0.3 V) to enter micro-power shutdown, and do not leave floating.
6 BS passive Bootstrap pin; a capacitor connected between LX and BST is required to form a floating supply across the high-side switch driver.

Key specifications

Parameter Value
Manufacturer TMI
Package SOT-23-6
Category Power Management (PMIC)
Pins 6

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
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 1000 mW 2
Lead Temperature (Soldering, 10s) 260 °C Soldering, 10s 2
Voltage Range IN 4.5 18 V 3
TJ Operating Junction Temperature TJ -40 125 °C 3
Input Voltage Range 4.5 18 V 4
Regulated Feedback Voltage (3253T) 0.75 0.765 0.78 V TA=25°C,4.5V≤VIN≤18V 4
On Time 132 166 200 ns VIN=12V, VOUT=1.2V, IOUT=1A 4
Shutdown Current 5 10 μA VIN=12V, EN=0V 4
High-Side Switch Leakage Current 1 10 μA VEN=0V, VLX=0V 4
OVP Threshold 19.3 V 4
UVLO Rising Threshold 4 V 4
UVLO Hysteresis 0.45 V 4
Quiescent Current 300 μA VEN=2V, VFB=VREF x 105% 4
High-Side Switch On-Resistance 140 mΩ 4
Low-Side Switch On-Resistance 70 mΩ 4
Switch Valley Current Limit 3 A Minimum Duty Cycle 4
Oscillation Frequency 600 kHz 4
Maximum Duty Cycle 65 % 4
Minimum On-Time 80 ns 4
Soft Start Time 1 ms 4
Hiccup on Time 1.4 ms 4
Hiccup Time Before Restart 4 ms 4
EN High-Level Input Voltage 1.5 V 4
EN Low-Level Input Voltage 0.3 V 4
Thermal Shutdown Hysteresis (Note 4) 165 °C Note 4 4
Thermal Shutdown Hysteresis (Note 4) 30 °C Note 4 4
Junction-to-ambient thermal resistance θJA 100 °C/W Measured on JESD51-7, 4-layer PCB (Note 3) 3

CAD (KiCad official)

  • Symbol: TMI3252T
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: tmi3252t-etched.step / tmi3252t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmi3252t.step / tmi3252t.glb are the bare package body.

Provenance

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

  • Datasheet: TMI datasheet (15 pp, sha256 30927acc2ca98daa, retrieved 2026-10-18, 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