component

LM25576MHX

Public Made by Adom

by adom

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

componentpower management (pmic)lm25576mhxfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm25576mhx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
viewers lm25576mhx: viewers · Ray 4d ago
lm25576mhx-etched.fit.json lm25576mhx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
lm25576mhx-etched.glb lm25576mhx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
lm25576mhx-etched.step lm25576mhx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 2d ago
lm25576mhx.glb lm25576mhx: factory component page (tier=lcsc) · Ray 4d ago
lm25576mhx.kicad_mod Publish 0.1.0 · Ray 4d ago
lm25576mhx.kicad_sym lm25576mhx: factory component page (tier=lcsc) · Ray 4d ago
lm25576mhx.lbr lm25576mhx: factory component page (tier=lcsc) · Ray 4d ago
lm25576mhx.step lm25576mhx: factory component page (tier=lcsc) · Ray 4d ago
package.json Publish 0.1.0 · Ray 4d ago
page.json Set visibility: public · Ray 4d ago
README.md lm25576mhx: factory component page (tier=lcsc) · Ray 4d ago

LM25576MHX

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

LM25576MHX from Texas Instruments, in a TSSOP-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 VCC power_in Bias regulator output, regulated 7V nominal when Vin >9V, tracks Vin when 6V <Vin <9V, requires 0.1µF-1µF ceramic bypass capacitor.
2 SD input Shutdown/UVLO input; voltage <0.7V disables regulator, 0.7V-1.225V standby mode, >1.225V normal operation, 0.1V hysteresis.
3 VIN power_in Input power supply voltage, 6V to 42V nominal operating range, absolute maximum 45V.
4 VIN power_in Input power supply voltage, 6V to 42V nominal operating range, absolute maximum 45V.
5 SYNC bidirectional Oscillator sync input/output; internal oscillator syncs with external clock via pulldown, minimum pulse width 15ns, multiple devices share single SYNC line.
6 COMP output Error amplifier output; loop compensation network connects between this pin and FB pin for Type II compensation.
7 FB input Feedback input from regulator output to error amplifier inverting input, 1.225V internal regulation threshold.
8 RT input Oscillator frequency setting input; external resistor to AGND determines operating frequency from 50kHz to 1MHz.
9 RAMP output Ramp signal output for current mode control; external capacitor 50pF-2000pF to AGND sets ramp slope.
10 AGND power_in Analog ground, internal reference for regulator control functions and low-side reference for analog signals.
11 SS output Soft start output; 10µA internal current source charges external capacitor, held low during standby/Vcc UVLO/thermal shutdown.
12 OUT output Output voltage connection pin directly connected to regulator output voltage.
13 PGND power_in Power ground; low-side reference for PRE switch and IS sense resistor, connects to output filter capacitor ground.
14 PGND power_in Power ground; low-side reference for PRE switch and IS sense resistor, connects to output filter capacitor ground.
15 IS input Current sense input for recirculation diode anode current; internal sense ratio 0.5V/A, sample/hold circuit updates at end of off-time.
16 IS input Current sense input for recirculation diode anode current; internal sense ratio 0.5V/A, sample/hold circuit updates at end of off-time.
17 SW output Switch node, internal buck MOSFET source terminal, -1.5V to 14V, connects to external Schottky diode cathode and inductor.
18 SW output Switch node, internal buck MOSFET source terminal, -1.5V to 14V, connects to external Schottky diode cathode and inductor.
19 PRE tri_state Bootstrap capacitor precharge assist; open-drain output conducts for 265ns per cycle before switch on-time to pre-charge bootstrap capacitor.
20 BST input Bootstrap capacitor input; 0.022µF ceramic capacitor required between BST and SW, charges from Vcc during switch off, absolute maximum 60V.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20-EP
Category Power Management (PMIC)
Pins 21

CAD (KiCad official)

  • Symbol: LM25576MHX
  • Footprint: Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm
  • 3D model: TSSOP-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: lm25576mhx-etched.step / lm25576mhx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm25576mhx.step / lm25576mhx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (37 pp, sha256 ed0031dc76d29d88, retrieved 2026-10-01, 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-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