component
LM5576QMHX
Public Made by Adomby adom
Texas Instruments Global Sourcing Parts, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM5576QMHX
Texas Instruments · Global Sourcing Parts · HTSSOP-20-EP
LM5576QMHX 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 | VCC | power_out | Regulated 7V output from internal bias regulator with 25mA max current; tracks VIN when below 9V, regulated to 7V when VIN exceeds 9V. |
| 2 | SD | input | Shutdown/UVLO input with dual thresholds: below 0.7V enters low power mode, 0.7V to 1.225V is standby mode, above 1.225V enables normal operation; 5µA internal pull-up. |
| 3 | VIN | power_in | Input power supply voltage with rated operating range from 6V to 75V. |
| 4 | VIN | power_in | Input power supply voltage with rated operating range from 6V to 75V. |
| 5 | SYNC | bidirectional | Oscillator synchronization input/output allowing internal oscillator to sync with external clock or multiple device SYNC pins connected together. |
| 6 | COMP | output | Error amplifier output for external loop compensation network connection (typically type-II filter) to FB pin. |
| 7 | FB | input | Feedback input to error amplifier inverting input with 1.225V regulation threshold and 10nA input bias current. |
| 8 | RT | input | Oscillator frequency setting input; external resistor between this pin and AGND sets switching frequency from 50kHz to 500kHz. |
| 9 | RAMP | output | Current ramp generator output; external capacitor (50pF to 2000pF) connected between this pin and AGND sets ramp slope for current-mode control. |
| 10 | AGND | power_in | Analog ground reference for internal control circuit bias functions and precision reference. |
| 11 | SS | output | Soft start output with 10µA internal charging current; external capacitor sets error amplifier reference rise time constant, pulled low during standby and thermal shutdown. |
| 12 | OUT | output | Output voltage node directly connected to regulated output voltage for feedback network. |
| 13 | PGND | power_in | Power ground reference for pre-switch driver and current sense resistor low-side reference. |
| 14 | PGND | power_in | Power ground reference for pre-switch driver and current sense resistor low-side reference. |
| 15 | IS | input | Current sense input measuring recirculation diode current through internal 42mΩ sense resistor; sample-hold at end of off-time provides 0.5V/A proportional DC level. |
| 16 | IS | input | Current sense input measuring recirculation diode current through internal 42mΩ sense resistor; sample-hold at end of off-time provides 0.5V/A proportional DC level. |
| 17 | SW | output | Switch node output from internal 75V/170mΩ N-channel buck MOSFET source terminal; must connect to Schottky diode and buck inductor. |
| 18 | SW | output | Switch node output from internal 75V/170mΩ N-channel buck MOSFET source terminal; must connect to Schottky diode and buck inductor. |
| 19 | PRE | output | Open-drain precharge assist output for bootstrap capacitor; internal MOSFET conducts 265ns per cycle to charge BST capacitor during light load or pre-charge applications. |
| 20 | BST | input | Bootstrap input for high-side gate driver; external 0.022µF ceramic capacitor required between BST and SW pins, charges from VCC during buck switch off-time. |
| 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 | Global Sourcing Parts |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
LM5576QMHX - 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:
lm5576qmhx-etched.step/lm5576qmhx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm5576qmhx.step/lm5576qmhx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (38 pp, sha256
805d7577975dee6d, 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 0.2, primaryclaude-haiku-4-5-20251001(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).