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LM20242MHX

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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LM20242MHX

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

LM20242MHX 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 SS/TRK input Soft-start or tracking control input charged by internal 5 µA source; defaults to 1 ms internal ramp if open or tracks external voltage source.
2 FB input Feedback input to error amplifier inverting input from regulated output; compared against internal 800 mV reference.
3 PGOOD tri_state Open drain power good output indicating output voltage is regulating within 93% to 97% of target with 20 µs deglitch delay.
4 COMP output Error amplifier output for pulse width modulator input; loop compensation network connected between COMP and AGND.
5 VIN power_in Input supply voltage pin with nominal operating range of 4.5V to 36V.
6 VIN power_in Input supply voltage pin with nominal operating range of 4.5V to 36V.
7 SW output Switch node connecting drain of synchronous rectifier NMOSFET and source of control NMOSFET to inductor.
8 SW output Switch node connecting drain of synchronous rectifier NMOSFET and source of control NMOSFET to inductor.
9 GND power_in Ground pin providing internal reference for power MOSFETs.
10 GND power_in Ground pin providing internal reference for power MOSFETs.
11 GND power_in Ground pin providing internal reference for power MOSFETs.
12 AGND power_in Analog ground providing internal reference for regulator control and feedback circuits.
13 SW output Switch node connecting drain of synchronous rectifier NMOSFET and source of control NMOSFET to inductor.
14 SW output Switch node connecting drain of synchronous rectifier NMOSFET and source of control NMOSFET to inductor.
15 VIN power_in Input supply voltage pin with nominal operating range of 4.5V to 36V.
16 VIN power_in Input supply voltage pin with nominal operating range of 4.5V to 36V.
17 BOOT input Bootstrap capacitor input charged by internal diode from VCC when SW transitions low to power high-side gate driver.
18 VCC power_out Regulated output set to 5.5V nominal for VIN above 7.2V and tracking VIN below 7.2V; requires 0.1 µF to 1 µF ceramic bypass capacitor.
19 EN input Enable or UVLO input with rising threshold 1.25V typical and 50 mV hysteresis; 2 µA pull-up enables device if pin left unconnected.
20 RT input Oscillator frequency adjust input; external resistor to AGND sets switching frequency from 100 kHz to 1 MHz per equation fSW = (82000/RRT − 56) kHz.
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: LM20242MHX
  • 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: lm20242mhx-etched.step / lm20242mhx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm20242mhx.step / lm20242mhx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (32 pp, sha256 860788d839eb1f90, retrieved 2026-10-01, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, 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