component

LMR61428XMMX

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, VSSOP-8-0.65mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LMR61428XMMX

Texas Instruments · DC-DC Converters · VSSOP-8-0.65mm

LMR61428XMMX from Texas Instruments, in a VSSOP-8-0.65mm. 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 PGND power_in Power ground return for power stage circuits.
2 EN input Active-low shutdown input; regulator disabled below 0.15×VDD, enabled above 0.7×VDD; absolute maximum rating -0.5V to 10V.
3 FREQ input Frequency programming input; external resistor connected between FREQ and VDD sets switching frequency from 300kHz to 2MHz; 100µA maximum current rating.
4 FB input Output voltage feedback input from resistor divider for regulated output voltage 1.24V to 14V; typical pin voltage 1.24V; absolute maximum rating -0.5V to 10V.
5 SGND power_in Signal ground for feedback and control circuits.
6 VDD power_in Power supply input for internal control circuitry; operating range 2.5V to 5V; absolute maximum rating -0.5V to 10V.
7 BOOT power_in Bootstrap supply input for MOSFET gate driver; operating range 0V to 10V; absolute maximum rating -0.5V to 10V.
8 SW output Drain of internal N-channel MOSFET power switch; boost converter switching node connecting to inductor and freewheeling diode; absolute maximum rating -0.5V to 14.5V with 2.85A peak switch current limit.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VSSOP-8-0.65mm
Category Power Supply Chip
Pins 8

CAD (KiCad official)

  • Symbol: LMR61428XMMX
  • Footprint: Package_SO:VSSOP-8_2.3x2mm_P0.5mm
  • 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
  • 3D model files: lmr61428xmmx-etched.step / lmr61428xmmx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lmr61428xmmx.step / lmr61428xmmx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (22 pp, sha256 d55e65d8766ee830, retrieved 2026-10-07, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (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