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STI3453

Public Made by Adom

by adom

TMI DC-DC Converters, SOT-563. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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STI3453

TMI · DC-DC Converters · SOT-563

STI3453 from TMI, in a SOT-563. 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 IN power_in Power supply pin; the recommended input voltage range is 4.5 V to 18 V, and the absolute maximum input supply voltage is 20 V.
2 LX power_out Switching pin connected to the internal high-side and low-side power MOSFETs; LX voltage absolute maximum is -0.3 V to 20 V.
3 GND power_in Ground pin.
4 BS power_out Bootstrap pin; a capacitor connected between LX and BS is required to form a floating supply across the high-side switch driver, with BS voltage absolute maximum of -0.3 V to 23 V.
5 EN input Drive to logic-high to enable the IC and to logic-low to disable it into micro-power shutdown; do not leave floating, with EN rising threshold 0.85 V to 1.05 V and falling threshold 0.67 V to 0.87 V.
6 FB input Output voltage feedback input, connected to the center point of the external resistor divider; the regulated feedback voltage is 0.805 V typical, and the FB absolute maximum is 6 V.

Key specifications

Parameter Value
Manufacturer TMI
Package SOT-563
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 (Note 2) 160 °C 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 Temperature Range TJ -40 125 °C 3
Input Voltage Range 4.5 18 V 4
OVP Threshold 18.7 19.3 19.8 V 4
Shutdown Current 5 10 μA VIN=12V, EN=0V 4
Regulated Feedback Voltage 0.793 0.805 0.817 V TA=25°C, VIN=12V 4
High-Side Switch Leakage Current 1 10 μA VEN=0V, VLX=0V 4
Switch Valley Current Limit 3.7 4 4.5 A 4
On Time 90 120 160 ns VIN=12V, VOUT=1.2V, IOUT=1A 4
Oscillation Frequency 900 1000 1100 kHz 4
Soft Start Time 0.7 1 1.3 ms 4
EN Rising Threshold 0.85 0.95 1.05 V 4
EN Falling Threshold 0.67 0.77 0.87 V 4
Junction-to-ambient thermal resistance θJA 130 °C/W 3
Junction-to-case(top) thermal resistance θJC 60 °C/W 3
Junction-to-case(top) characterization parameter ψJC 3 °C/W 3
UVLO Rising Threshold 4.3 V 4
UVLO Hysteresis 0.35 V 4
Quiescent Current 300 μA VEN=2.0V, IOUT=0A, VFB=VREF x 105% 4
High-Side Switch On-Resistance 70 mΩ 4
Low-Side Switch On-Resistance 35 mΩ 4
Maximum Duty Cycle 85 % 4
Minimum On-Time (Note 4) 60 ns 4
Hiccup on Time (Note 4) 1.2 ms 4
Hiccup Time Before Restart 3.6 ms 4
EN Hysteresis 180 mV 4
Thermal Shutdown Threshold (Note 4) 165 °C 4
Thermal Shutdown Hysteresis (Note 4) 30 °C 4

CAD (KiCad official)

  • Symbol: STI3453
  • Footprint: Package_TO_SOT_SMD:SOT-563
  • 3D model: SOT-563 (KiCad packages3D, STEP)
  • 3D model files: sti3453-etched.step / sti3453-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sti3453.step / sti3453.glb are the bare package body.

Provenance

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

  • Datasheet: TMI datasheet (15 pp, sha256 5b44ca2afcd16ee1, 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