component
LM3103MHX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-16-EP. Datasheet-verified pinout, 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
markdownLM3103MHX
Texas Instruments · DC-DC Converters · HTSSOP-16-EP
LM3103MHX from Texas Instruments, in a HTSSOP-16-EP. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Input supply voltage pin to device with nominal input range of 4.5 V to 42 V. |
| 2 | VIN | power_in | Input supply voltage pin to device with nominal input range of 4.5 V to 42 V. |
| 3 | SW | output | Switch node internally connected to source of main MOSFET and drain of synchronous MOSFET; connect to output inductor. |
| 4 | SW | output | Switch node internally connected to source of main MOSFET and drain of synchronous MOSFET; connect to output inductor. |
| 5 | BST | passive | Bootstrap capacitor connection; connect 33 nF capacitor from SW pin and charge through internal diode during main MOSFET off-time. |
| 6 | AGND | power_in | Analog ground reference for all internal circuitry. |
| 7 | SS | passive | Soft-start pin with 70 µA internal current source charging external capacitor larger than 22 nF. |
| 8 | NC | unconnected | No connection; leave unconnected. |
| 9 | GND | power_in | Ground connection; must be connected to AGND pin for normal operation. |
| 10 | GND | power_in | Ground connection; must be connected to AGND pin for normal operation. |
| 11 | FB | input | Feedback input to regulation and over-voltage comparators with 0.6 V regulation setting; connect feedback resistors. |
| 12 | EN | input | Enable input with internal pull-up; connect to voltage higher than 1.6 V to enable device. |
| 13 | RON | input | On-time control input with external resistor from VIN pin to set main MOSFET on-time. |
| 14 | VCC | power_out | Startup regulator output regulated to 6 V nominal; connect capacitor larger than 1 µF between VCC and AGND for stable operation. |
| 15 | PGND | power_in | Power ground connection for synchronous MOSFET source; tie to ground plane. |
| 16 | PGND | power_in | Power ground connection for synchronous MOSFET source; tie to ground plane. |
| 17 | EP | power_in | Exposed pad thermal connection for die attach; connect to ground plane for thermal dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Supply Chip |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
LM3103MHX - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
lm3103mhx-etched.step/lm3103mhx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm3103mhx.step/lm3103mhx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (26 pp, sha256
c083cbc1b779ad70, retrieved 2026-09-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).