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LM26420YMHX

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM26420YMHX

Texas Instruments · DC-DC Converters · HTSSOP-20-EP

LM26420YMHX 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 Input supply for the control circuitry, operating within the recommended VIN range of 3 V to 5.5 V.
2 EN1 input Enable control input for Buck 1, logic high enables operation; do not allow this pin to float or be greater than VIN + 0.3 V.
3 VIND1 power_in Power input supply for Buck 1 (pins 3 and 4 are both VIND1).
4 VIND1 power_in Power input supply for Buck 1 (pins 3 and 4 are both VIND1).
5 SW1 power_out Output switch node for Buck 1; connect to the inductor.
6 PGND1 power_in Power ground pin for Buck 1 (pins 6 and 7 are both PGND1).
7 PGND1 power_in Power ground pin for Buck 1 (pins 6 and 7 are both PGND1).
8 FB1 input Feedback pin for Buck 1; connect to an external resistor divider to set the output voltage.
9 PG1 output Power Good indicator for Buck 1, an open-drain output pulled up through a resistor to an external supply.
10 DAP power_in Die attach pad; connect to system ground for low thermal impedance, but it cannot be used as a primary GND connection.
11 DAP power_in Die attach pad; connect to system ground for low thermal impedance, but it cannot be used as a primary GND connection.
12 PG2 output Power Good indicator for Buck 2, an open-drain output pulled up through a resistor to an external supply.
13 FB2 input Feedback pin for Buck 2; connect to an external resistor divider to set the output voltage.
14 PGND2 power_in Power ground pin for Buck 2 (pins 14 and 15 are both PGND2).
15 PGND2 power_in Power ground pin for Buck 2 (pins 14 and 15 are both PGND2).
16 SW2 power_out Output switch node for Buck 2; connect to the inductor.
17 VIND2 power_in Power input supply for Buck 2 (pins 17 and 18 are both VIND2).
18 VIND2 power_in Power input supply for Buck 2 (pins 17 and 18 are both VIND2).
19 EN2 input Enable control input for Buck 2, logic high enables operation; do not allow this pin to float or be greater than VIN + 0.3 V.
20 AGND power_in Signal ground pin; place the bottom resistor of the feedback network as close as possible to this pin.
21 DAP 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: LM26420YMHX
  • 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: lm26420ymhx-etched.step / lm26420ymhx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm26420ymhx.step / lm26420ymhx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (49 pp, sha256 990c6ab4facbae3a, 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, 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