component
LM3151MHX-3.3
Public Made by Adomby adom
Texas Instruments DC-DC Controllers, HTSSOP-14-EP. 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
markdownLM3151MHX-3.3
Texas Instruments · DC-DC Controllers · HTSSOP-14-EP
LM3151MHX-3.3 from Texas Instruments, in a HTSSOP-14-EP. 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 | VCC | power_out | Internal regulated supply regulated to a nominal 5.95 V, requiring a 1 µF to 2.2 µF decoupling capacitor from this pin to ground. |
| 2 | VIN | power_in | Device supply input with a rated input range of 6 V to 42 V, with the usable range for each ordering variant given in the ordering information. |
| 3 | EN | input | Enable input: a logic high above 1.26 V (typical) or a floating pin enables the device, and grounding it disables the part. |
| 4 | FB | input | Feedback input connected to the internal fixed-output resistor divider (3.3 V output) that senses output faults such as overvoltage and short circuit. |
| 5 | SGND | power_in | Signal ground for all internal bias and reference circuits, to be connected to PGND at a single point. |
| 6 | SS | passive | Soft-start pin, charged by an internal 7.7 µA source through an external capacitor to provide soft start. |
| 7 | N/C | unconnected | No internal connection; this pin may be left unconnected or tied to ground. |
| 8 | N/C | unconnected | No internal connection; this pin may be left unconnected or tied to ground. |
| 9 | SGND | power_in | Signal ground for all internal bias and reference circuits, to be connected to PGND at a single point. |
| 10 | SW | passive | Switch node that serves as the return rail for the controller and high-side gate driver, with the boost capacitor connected between this pin and BST; absolute maximum SW to GND is -3 V to 47 V. |
| 11 | HG | output | High-side gate drive output to the high-side NMOS switch, powered by the differential voltage between BST and SW. |
| 12 | BST | power_out | Bootstrap capacitor pin for the high-side gate driver rail, requiring a 0.33 µF to 0.47 µF capacitor between SW and BST, charged by an internal diode; must not be tied to an external supply rail. |
| 13 | LG | output | Low-side gate drive output to the low-side NMOS switch, powered from VCC. |
| 14 | PGND | power_in | Power ground that is the source connection of the synchronous rectifier MOSFET, to be connected to the power ground plane and to SGND at a single point. |
| 15 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-14-EP |
| Category | Power Supply Chip |
| Pins | 15 |
CAD (KiCad official)
- Symbol:
LM3151MHX-3.3 - Footprint:
Package_SO:TSSOP-14-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-14-EP (KiCad packages3D, STEP)
- 3D model files:
lm3151mhx-3-3-etched.step/lm3151mhx-3-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm3151mhx-3-3.step/lm3151mhx-3-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (27 pp, sha256
c7737d78325ad7c7, retrieved 2026-10-08, 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 0.3, primaryclaude-haiku-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).