component
LM26420Q1XMHX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownLM26420Q1XMHX
Texas Instruments · DC-DC Converters · HTSSOP-20-EP
LM26420Q1XMHX from Texas Instruments, in a HTSSOP-20-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 | VINC | power_in | Supply for the control circuitry and high/low-side gate drivers; it should be RC-filtered to AGND (RF typically 1-10 Ω, CF 0.22-1 µF in X7R/X5R) and must not be lower than VIND1,2 − VTH. |
| 2 | EN1 | input | Logic-high enable input for buck converter 1; do not leave it floating or drive it above VIN + 0.3 V. |
| 3 | VIND1 | power_in | Input power supply for buck converter 1 (recommended VIN range 3 V to 5.5 V). |
| 4 | VIND1 | power_in | Input power supply for buck converter 1 (recommended VIN range 3 V to 5.5 V); pins 3 and 4 are internally the same net. |
| 5 | SW1 | power_out | Output switch node of buck converter 1; connects to the inductor. |
| 6 | PGND1 | power_in | Power ground pin for buck converter 1. |
| 7 | PGND1 | power_in | Power ground pin for buck converter 1; pins 6 and 7 are internally the same net. |
| 8 | FB1 | input | Feedback pin for buck converter 1; connect to an external resistor divider to set the output voltage (VREF = 0.8 V). |
| 9 | PG1 | output | Power-good indicator for buck converter 1; open-drain output that must be pulled up to an external supply through a resistor (typically 10 kΩ to 100 kΩ). |
| 10 | DAP | passive | Die attach pad connection; connect to system ground for low thermal resistance, but this pin cannot be used as the main GND connection. |
| 11 | DAP | passive | Die attach pad connection; connect to system ground for low thermal resistance, but this pin cannot be used as the main GND connection. |
| 12 | PG2 | output | Power-good indicator for buck converter 2; open-drain output that must be pulled up to an external supply through a resistor (typically 10 kΩ to 100 kΩ). |
| 13 | FB2 | input | Feedback pin for buck converter 2; connect to an external resistor divider to set the output voltage (VREF = 0.8 V). |
| 14 | PGND2 | power_in | Power ground pin for buck converter 2. |
| 15 | PGND2 | power_in | Power ground pin for buck converter 2; pins 14 and 15 are internally the same net. |
| 16 | SW2 | power_out | Output switch node of buck converter 2; connects to the inductor. |
| 17 | VIND2 | power_in | Input power supply for buck converter 2 (recommended VIN range 3 V to 5.5 V). |
| 18 | VIND2 | power_in | Input power supply for buck converter 2 (recommended VIN range 3 V to 5.5 V); pins 17 and 18 are internally the same net. |
| 19 | EN2 | input | Logic-high enable input for buck converter 2; do not leave it floating or drive it above VIN + 0.3 V. |
| 20 | AGND | power_in | Signal ground pin; place the bottom feedback resistor as close as possible to this pin. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-20-EP |
| Category | Power Supply Chip |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
LM26420Q1XMHX - Footprint:
Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm - 3D model: HTSSOP-20-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.2 mm nominal TSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
lm26420q1xmhx-etched.step/lm26420q1xmhx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm26420q1xmhx.step/lm26420q1xmhx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (47 pp, sha256
b25d3310c3924b09, 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).