component
LM5575MHX
Public Unreviewedby Ray
Texas Instruments DC-DC Converters, HTSSOP-16-EP. Datasheet-verified pinout, 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
markdownLM5575MHX
Texas Instruments · DC-DC Converters · HTSSOP-16-EP
LM5575MHX from Texas Instruments, in a HTSSOP-16-EP. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_out | Bias regulator output. VCC tracks VIN up to ~9V then regulates to ~7V. Requires 0.1 µF to 1 µF ceramic decoupling capacitor. Can be back-fed from an external 7.5-14V rail to reduce internal power dissipation. |
| 2 | SD | input | Shutdown / UVLO input. Below 0.7V the regulator is in low-power shutdown; 0.7V-1.225V puts the part in standby; above 1.225V enables normal operation. Internally pulled up by ~5 µA current source. |
| 3 | VIN | power_in | Input supply voltage. Nominal operating range 6V to 75V. |
| 4 | SYNC | bidirectional | Oscillator synchronization input or output. Can be driven by an external clock or by another LM5575 for master/slave synchronization of multiple devices. |
| 5 | COMP | output | Internal error amplifier output. Loop-compensation network connects between COMP and FB. |
| 6 | FB | input | Feedback input from the regulated output. Connected to the inverting input of the internal error amplifier; regulation threshold is 1.225V. |
| 7 | RT | input | Internal oscillator frequency-set input. An external resistor from RT to AGND programs the switching frequency (50 kHz to 500 kHz). |
| 8 | RAMP | input | Ramp-control signal for emulated current-mode control. External capacitor from RAMP to AGND sets the current-sense ramp slope; recommended 50 pF to 2000 pF. |
| 9 | AGND | power_in | Analog ground. Internal reference return for the regulator control circuitry. |
| 10 | SS | input | Soft-start. An external capacitor with an internal 10 µA current source sets the error amplifier reference ramp-up time. Held low during standby, VCC UVLO, and thermal shutdown. |
| 11 | OUT | input | Output-voltage sense/connection. Connects directly to the regulator output voltage. |
| 12 | PGND | power_in | Power ground. Low-side return for the PRE switch and the IS current-sense resistor. |
| 13 | IS | input | Current-sense input for the recirculating (freewheel) diode current. An internal sense resistor and sample/hold measures diode current at end of the off-time to provide the emulated current-mode ramp DC level. |
| 14 | SW | power_out | Switch node. Source terminal of the internal buck switch; connects to the external Schottky freewheel diode and the buck inductor. |
| 15 | PRE | output | Auxiliary bootstrap-capacitor pre-charge output. Open-drain output connected to SW for pre-charging the bootstrap capacitor at very light loads or prior to enable. Internal pre-charge MOSFET turns on ~250 ns before each buck switch on-time. |
| 16 | BST | power_in | Bootstrap-capacitor boost input. External 0.022 µF ceramic capacitor between BST and SW; charged from VCC through an internal diode during the buck switch off-time. |
| EP | EP | passive | Exposed thermal pad on the underside of the package. Recommended to connect to the PCB ground plane for improved thermal dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | PMIC |
| Pins | 17 |
Ordering variants
Same part, different packaging or reel option.
LM5575MHXLM5575MHXQMHLM5575MHXQMHX
CAD (KiCad official)
- Symbol:
LM5575MHX - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (24 pp, sha256
3b7d52abfb20c293, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).