component
LM5066IPMHX
Public Made by Adomby adom
Texas Instruments Surge Suppressors, HTSSOP-28. 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
markdownLM5066IPMHX
Texas Instruments · Surge Suppressors · HTSSOP-28
LM5066IPMHX from Texas Instruments, in a HTSSOP-28. 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 | OUT | input | Connects to the output rail (external MOSFET source) to set the MOSFET VDS for power limiting and to monitor the output voltage. |
| 2 | GATE | output | Gate drive output that connects to the external MOSFET gate. |
| 3 | SENSE | input | Current sense input; the voltage across RSNS is measured from VIN_K to this pin, and an overcurrent threshold limits load current and activates the fault timer. |
| 4 | VIN_K | input | Positive supply Kelvin pin on which the input voltage is measured. |
| 5 | VIN | power_in | Input supply connection for the device. |
| 6 | NC | unconnected | No connection. |
| 7 | UVLO/EN | input | External resistor divider sets the undervoltage turn-on threshold, with a nominal enable threshold of 2.48 V; the pin can also be used for remote shutdown control. |
| 8 | OVLO | input | External resistor divider sets the overvoltage turn-off threshold, with a disable threshold of 2.46 V. |
| 9 | AGND | power_in | Analog device ground that connects to GND at the pin. |
| 10 | GND | power_in | Circuit ground. |
| 11 | SDAI | input | SMBus data input pin that connects to SDAO if unidirectional isolation devices are not required. |
| 12 | SDAO | output | SMBus data output pin that connects to SDAI if unidirectional isolation devices are not required. |
| 13 | SCL | input | Clock pin for the SMBus. |
| 14 | SMBA | output | SMBus alert line, active low. |
| 15 | VREF | power_in | Internally generated precision reference used for analog-to-digital conversion; connect a 1-µF capacitor to ground for bypassing. |
| 16 | DIODE | passive | Connects to a diode-configured MMBT3904 NPN transistor for temperature monitoring. |
| 17 | VAUX | input | Auxiliary pin for voltage telemetry from an external source with a full-scale input of 2.97 V. |
| 18 | ADR2 | tri_state | Tri-state SMBus address line that should be connected to GND, VDD, or left floating. |
| 19 | ADR1 | tri_state | Tri-state SMBus address line that should be connected to GND, VDD, or left floating. |
| 20 | ADR0 | tri_state | Tri-state SMBus address line that should be connected to GND, VDD, or left floating. |
| 21 | VDD | power_out | Internally sub-regulated 4.85-V bias supply; connect a 1-µF capacitor to ground for bypassing. |
| 22 | CL | input | Connect to GND or leave floating for a nominal 50 mV overcurrent threshold; connecting to VDD sets the threshold to 26 mV. |
| 23 | FB | input | External resistor divider from the output sets the voltage at which PGD switches, with a threshold nominally at 2.46 V. |
| 24 | RETRY | input | Configures power-up fault retry behavior: GND or floating retries continually during a fault, while VDD latches the device off during a fault. |
| 25 | TIMER | passive | External timing capacitor that sets insertion time delay, fault timeout period, and restart timing. |
| 26 | PWR | input | External resistor, together with RSNS, sets the maximum power dissipation allowed in the external series pass MOSFET. |
| 27 | NC | unconnected | No connection. |
| 28 | PGD | output | Open-drain power good output that is high when the FB voltage is above VFBTH (nominally 2.46 V) and the VIN supply is within its UVLO and OVLO thresholds; connect to a pull-up supply. |
| 29 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-28 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 29 |
CAD (KiCad official)
- Symbol:
LM5066IPMHX - Footprint:
Package_SO:TSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.85x6.7mm - 3D model: HTSSOP-28 (KiCad packages3D, STEP)
- 3D model files:
lm5066ipmhx-etched.step/lm5066ipmhx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm5066ipmhx.step/lm5066ipmhx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (70 pp, sha256
1c957c735de35462, retrieved 2026-10-28, tier: manufacturer) - 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, primaryclaude-haiku-5-5(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).