component
TPS54331D
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOIC-8. 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
markdownTPS54331D
Texas Instruments · DC-DC Converters · SOIC-8
TPS54331D from Texas Instruments, in a SOIC-8. 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 | BOOT | output | Bootstrap supply output for high-side MOSFET gate drive; requires 0.1μF capacitor to PH pin; MOSFET forced off if voltage falls below 2.1V typical. |
| 2 | VIN | power_in | Main input power supply; operating range 3.5V to 28V, absolute maximum 30V. |
| 3 | EN | input | Active-high enable control; device disabled at 1.25V threshold; programmable UVLO via external resistor divider. |
| 4 | SS | input | Soft start capacitor connection; sets output ramp rate at 2μA charge current; recommended time range 1ms to 10ms with maximum 27nF capacitor. |
| 5 | VSENSE | input | Error amplifier inverting input for output voltage feedback; compares actual output to 0.8V internal reference; maximum pull current 10μA. |
| 6 | COMP | output | Error amplifier output and PWM comparator input; frequency compensation network elements connected here; maximum sink current 100μA. |
| 7 | GND | power_in | Ground reference terminal. |
| 8 | PH | output | High-side MOSFET source switch node output; maximum voltage 30V, minimum -0.6V, rated 9A peak pull current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage, VIN pin | VIN | -0.3 | 30 | V | 4 | ||
| Input voltage, EN pin | EN | -0.3 | 6 | V | 4 | ||
| Input voltage, BOOT pin | BOOT | 38 | V | 4 | |||
| Input voltage, VSENSE pin | VSENSE | -0.3 | 3 | V | 4 | ||
| Input voltage, COMP pin | COMP | -0.3 | 3 | V | 4 | ||
| Input voltage, SS pin | SS | -0.3 | 3 | V | 4 | ||
| Output voltage, BOOT-PH | BOOT-PH | 8 | V | 4 | |||
| Output voltage, PH pin | PH | -0.6 | 30 | V | 4 | ||
| PH pin transient voltage | PH | -5 | V | 10 ns transient from GND to negative peak | 4 | ||
| Source current, EN pin | EN | 100 | μA | 4 | |||
| Source current, BOOT pin | BOOT | 100 | mA | 4 | |||
| Source current, VSENSE pin | VSENSE | 10 | μA | 4 | |||
| Source current, PH pin | PH | 9 | A | 4 | |||
| Sink current, VIN pin | VIN | 9 | A | 4 | |||
| Sink current, COMP pin | COMP | 100 | μA | 4 | |||
| Sink current, SS pin | SS | 200 | μA | 4 | |||
| Operating junction temperature | TJ | -40 | 150 | °C | 4 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 4 | ||
| ESD, human body model (HBM) | V(ESD) | -2 | 2 | kV | ANSI/ESDA/JEDEC JS-001, all pins | 4 | |
| ESD, charged device model (CDM) | V(ESD) | -500 | 500 | V | JEDEC JESD22-C101, all pins | 4 | |
| Operating input voltage at VIN pin | VIN | 3.5 | 28 | V | 4 | ||
| Operating junction temperature | TJ | -40 | 150 | °C | 4 | ||
| Voltage reference | VREF | 0.772 | 0.8 | 0.828 | V | 5 | |
| Shutdown supply current | IQ(SD) | 1 | 4 | μA | EN = 0V, VIN = 12V, -40°C to 85°C | 5 | |
| Operating non-switching supply current | IQ | 110 | 190 | μA | VSENSE = 0.85V | 5 | |
| Enable threshold, rising and falling | EN | 1.25 | 1.35 | V | rising and falling | 5 | |
| Current limit threshold | ILIM | 3.5 | 5.8 | A | VIN = 12V | 5 | |
| Error amplifier source and sink current | ICOMP | -7 | 7 | μA | V(COMP) = 1V, 100mV overdrive | 5 | |
| High-side MOSFET on-resistance | RDS(on) | 115 | 200 | mΩ | BOOT-PH = 3V, VIN = 3.5V | 5 | |
| High-side MOSFET on-resistance | RDS(on) | 80 | 150 | mΩ | BOOT-PH = 6V, VIN = 12V | 5 | |
| Switching frequency | fSW | 456 | 570 | 684 | kHz | VIN = 12V, 25°C | 6 |
| Minimum controllable on-time | tON(min) | 105 | 130 | ns | VIN = 12V, 25°C | 6 | |
| Maximum controllable duty cycle | DMAX | 90 | 93 | % | BOOT-PH = 6V | 6 | |
| Junction-to-ambient thermal resistance (D package) | RθJA | 116.3 | °C/W | 5 | |||
| Junction-to-case (top) thermal resistance (D package) | RθJC(top) | 53.7 | °C/W | 5 | |||
| Junction-to-board thermal resistance (D package) | RθJB | 57.1 | °C/W | 5 | |||
| Junction-to-top characterization parameter (D package) | ψJT | 12.9 | °C/W | 5 | |||
| Junction-to-board characterization parameter (D package) | ψJB | 56.5 | °C/W | 5 |
CAD (KiCad official)
- Symbol:
TPS54331D - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
tps54331d-etched.step/tps54331d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tps54331d.step/tps54331d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (40 pp, sha256
6ac89d4fddb009ba, retrieved 2026-09-23, 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(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).