component
LM2736XMKX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TSOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM2736XMKX
Texas Instruments · DC-DC Converters · TSOT-23-6
LM2736XMKX from Texas Instruments, in a TSOT-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 | BOOST | input | Boost voltage that drives the internal NMOS control switch, with a bootstrap capacitor connected between the BOOST and SW pins (Boost voltage -0.5 V to 23 V recommended, Boost to SW 1.6 V to 5.5 V). |
| 2 | GND | power_in | Signal and power ground pin; place the bottom resistor of the feedback network as close as possible to this pin for accurate regulation. |
| 3 | FB | input | Feedback pin; connect FB to the external resistor divider to set the output voltage (absolute maximum -0.5 V to 3 V). |
| 4 | EN | input | Enable control input where logic high enables operation; do not allow this pin to float or be greater than VIN + 0.3 V. |
| 5 | VIN | power_in | Input supply voltage (3 V to 18 V recommended); connect a bypass capacitor to this pin. |
| 6 | SW | output | Output switch that connects to the inductor, catch diode, and bootstrap capacitor (-0.5 V to 18 V recommended). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSOT-23-6 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | VFB | 1.225 | 1.25 | 1.275 | V | TJ = -40°C to 125°C | 5 |
| Feedback Input Bias Current | IFB | 10 | 250 | nA | Sink/Source | 5 | |
| Undervoltage Lockout VIN Rising | UVLO | 2.74 | 2.9 | V | VIN Rising | 5 | |
| Undervoltage Lockout VIN Falling | UVLO | 2 | 2.3 | V | VIN Falling | 5 | |
| UVLO Hysteresis | UVLO | 0.3 | 0.44 | 0.62 | V | 5 | |
| Switching Frequency LM2736X | FSW | 1.2 | 1.6 | 1.9 | MHz | LM2736X | 5 |
| Maximum Duty Cycle LM2736X | DMAX | 85 | 92 | % | LM2736X | 5 | |
| Minimum Duty Cycle LM2736X | DMIN | 2 | % | LM2736X | 5 | ||
| Switch ON Resistance | RDS(ON) | 350 | 650 | mΩ | VBOOST - VSW = 3V | 5 | |
| Switch Current Limit | ICL | 1 | 1.5 | 2.3 | A | VBOOST - VSW = 3V | 5 |
| Quiescent Current Switching | IQ | 1.5 | 2.5 | mA | Switching | 5 | |
| Boost Pin Current LM2736X | IBOOST | 2.2 | 3.3 | mA | LM2736X (50% Duty Cycle) | 5 | |
| Shutdown Threshold Voltage | VEN_TH | 0.4 | V | VEN Falling | 5 | ||
| Enable Threshold Voltage | VEN_TH | 1.8 | V | VEN Rising | 5 | ||
| Enable Pin Current | IEN | 10 | nA | Sink/Source | 5 | ||
| Switch Leakage | ISW | 40 | nA | 5 | |||
| Quiescent Current (shutdown) | IQ | 30 | nA | VEN = 0V | 5 | ||
| Feedback Voltage Line Regulation | ΔVFB/ΔVIN | 0.01 | % / V | VIN = 3V to 18V | 5 | ||
| Input Voltage | VIN | 3 | 18 | V | 4 | ||
| SW Voltage | SW | -0.5 | 18 | V | 4 | ||
| Boost Voltage | BOOST | -0.5 | 23 | V | 4 | ||
| Boost to SW Voltage | 1.6 | 5.5 | V | 4 | |||
| Junction Temperature Range | TJ | -40 | 125 | °C | 4 | ||
| VIN | VIN | -0.5 | 22 | V | 4 | ||
| SW Voltage | SW | -0.5 | 22 | V | 4 | ||
| Boost Voltage | BOOST | -0.5 | 28 | V | 4 | ||
| Boost to SW Voltage | -0.5 | 8 | V | 4 | |||
| FB Voltage | FB | -0.5 | 3 | V | 4 | ||
| EN Voltage | EN | -0.5 | V | max is VIN + 0.3 V | 4 | ||
| Junction Temperature | TJ | 150 | °C | 4 | |||
| Soldering Infrared/Convection Reflow | 220 | °C | 15 sec | 4 | |||
| Wave Soldering Lead temperature | 260 | °C | 10 sec | 4 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| ESD HBM | V(ESD) | -2000 | 2000 | V | Human body model, all pins | 4 | |
| Junction-to-ambient thermal resistance | RθJA | 158.1 | °C/W | DDC, 3" x 3" 4-layer 2oz board, still air | 4 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 46.5 | °C/W | DDC | 4 | ||
| Junction-to-board thermal resistance | RθJB | 29.5 | °C/W | DDC | 4 | ||
| Junction-to-top characterization parameter | ψJT | 0.8 | °C/W | DDC | 4 | ||
| Junction-to-board characterization parameter | ψJB | 29.2 | °C/W | DDC | 4 |
CAD (KiCad official)
- Symbol:
LM2736XMKX - Footprint:
Package_TO_SOT_SMD:TSOT-23-6 - 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lm2736xmkx-etched.step/lm2736xmkx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2736xmkx.step/lm2736xmkx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
adf1c5a775dcaa6f, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).