Specifications
| Type | Description |
|---|---|
| Part Number | TPS54331 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | D (SOIC, 8) and DDA (SO PowerPAD, 8), 4.90 mm x 6 mm nominal |
| Input Voltage Range | 3.5 to 28 V; VIN pin, recommended operating condition |
| Output Current | 3 A continuous; integrated high-side MOSFET supports output current |
| Adjustable Output Voltage | Down to 0.8 V; feedback reference-based adjustable output |
| Switching Frequency | 570 kHz typ, 456 kHz min, 684 kHz max; VIN = 12 V, TJ = 25°C |
| Shutdown Supply Current | 1 uA typ, 4 uA max; EN = 0 V, VIN = 12 V, -40°C to 85°C |
| Operating Non-Switching Supply Current | 110 uA typ, 190 uA max; VSENSE = 0.85 V |
| Internal Undervoltage Lockout Threshold | 3.5 V typ; rising and falling VIN threshold |
| Enable Threshold | 1.25 V min, 1.35 V max; rising and falling EN threshold |
| EN Input Current | -1 uA typ; enable threshold - 50 mV |
| EN Input Current | -4 uA typ; enable threshold + 50 mV |
| Voltage Reference | 0.772 V min, 0.8 V typ, 0.828 V max; TJ = -40°C to 150°C, VIN = 3.5 to 28 V |
| High-Side MOSFET On Resistance | 115 mohm typ, 200 mohm max; BOOT-PH = 3 V, VIN = 3.5 V |
| High-Side MOSFET On Resistance | 80 mohm typ, 150 mohm max; BOOT-PH = 6 V, VIN = 12 V |
| Error Amplifier Transconductance | 92 umhos typ; -2 uA < ICOMP < 2 uA, VCOMP = 1 V |
| Error Amplifier DC Gain | 800 V/V typ; VSENSE = 0.8 V, specified by design |
| Error Amplifier Unity Gain Bandwidth | 2.7 MHz typ; 5-pF capacitance from COMP to GND, specified by design |
| Error Amplifier Source and Sink Current | +/-7 uA typ; VCOMP = 1 V, 100-mV overdrive |
| Switch Current to COMP Transconductance | 12 A/V typ; VIN = 12 V |
| Pulse Skipping Eco-mode Switch Current Threshold | 160 mA typ; pulse skipping Eco-mode |
| Current Limit Threshold | 3.5 A min, 5.8 A typ; VIN = 12 V |
| Thermal Shutdown | 165°C typ; thermal shutdown protection |
| Slow Start Charge Current | 2 uA typ; VSS = 0.4 V |
| SS to VSENSE Matching | 10 mV typ; VSS = 0.4 V |
| Minimum Controllable On Time | 105 ns typ, 130 ns max; VIN = 12 V, TJ = 25°C |
| Maximum Controllable Duty Ratio | 90% min, 93% typ; BOOT-PH = 6 V |
| Operating Junction Temperature | -40°C to 150°C; recommended operating condition |
| Absolute Maximum VIN Voltage | -0.3 V min, 30 V max; input voltage absolute maximum rating |
| Absolute Maximum EN Voltage | -0.3 V min, 6 V max; input voltage absolute maximum rating |
| Absolute Maximum BOOT Voltage | 38 V max; input voltage absolute maximum rating |
| Absolute Maximum VSENSE Voltage | -0.3 V min, 3 V max; input voltage absolute maximum rating |
| Absolute Maximum COMP Voltage | -0.3 V min, 3 V max; input voltage absolute maximum rating |
| Absolute Maximum SS Voltage | -0.3 V min, 3 V max; input voltage absolute maximum rating |
| Absolute Maximum BOOT-PH Voltage | 8 V max; input voltage absolute maximum rating |
| Absolute Maximum PH Output Voltage | -0.6 V min, 30 V max; output voltage absolute maximum rating |
| PH Negative Transient Voltage | -5 V min; 10-ns transient from ground to negative peak |
| HBM ESD Rating | -2 kV min, 2 kV max; human body model per ANSI/ESDA/JEDEC JS-001, all pins |
| CDM ESD Rating | -500 V min, 500 V max; charged device model per JEDEC JESD22-C101, all pins |
| Junction-to-Ambient Thermal Resistance | 116.3°C/W; D package, 8 pins |
| Junction-to-Ambient Thermal Resistance | 48.7°C/W; DDA package, 8 pins |
| Datasheet Status | request_only |
Product Overview
The TPS54331 is a Texas Instruments Power_Management IC for step-down DC-DC conversion. Its recommended VIN operating range is 3.5 to 28 V, and the integrated high-side MOSFET supports 3 A continuous output current. The feedback reference allows an adjustable output down to 0.8 V, with a voltage reference specified from 0.772 V to 0.828 V over the stated temperature and input-voltage conditions.
The device switches at 570 kHz typical under VIN = 12 V and TJ = 25°C conditions, with specified minimum and maximum limits of 456 kHz and 684 kHz. Control-related specifications include a 105 ns typical minimum controllable on time, a 93% typical maximum controllable duty ratio, error-amplifier parameters, and switch-current-to-COMP transconductance.
Packaging is available as D (SOIC, 8) or DDA (SO PowerPAD, 8), both listed with a 4.90 mm x 6 mm nominal package size. Thermal data gives 116.3°C/W junction-to-ambient resistance for the D package and 48.7°C/W for the DDA package. The device is suited for regulated low-voltage rails requiring buck conversion from VIN ranges up to 28 V.
Key Features
- 3.5 to 28 V recommended VIN operating range
- 3 A continuous output current capability
- Adjustable output voltage down to 0.8 V
- 570 kHz typical switching frequency
- 1 uA typical shutdown supply current
- 110 uA typical operating non-switching supply current
- Internal undervoltage lockout at 3.5 V typical
- Pulse skipping Eco-mode threshold at 160 mA typical
- Current limit threshold of 3.5 A minimum
- Thermal shutdown at 165°C typical
- SOIC-8 and SO PowerPAD-8 package options
Typical Applications
- Point-of-load buck regulation
- 3.5 to 28 V input systems
- 3 A regulated supply rails
- Low-voltage rails down to 0.8 V
- Enable-controlled power rails
- Systems using Eco-mode pulse skipping
- SOIC-8 or PowerPAD-8 assemblies
Procurement Notes
When requesting a quote for TPS54331, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What input voltage range does the TPS54331 support?
The TPS54331 has a recommended VIN pin operating range of 3.5 to 28 V. Its absolute maximum VIN rating is specified from -0.3 V minimum to 30 V maximum.
What output current is supported by the TPS54331?
The integrated high-side MOSFET supports 3 A continuous output current. Current-limit threshold is specified at 3.5 A minimum and 5.8 A typical with VIN = 12 V.
Which package options are listed for the TPS54331?
The extracted package data lists D (SOIC, 8) and DDA (SO PowerPAD, 8) package options, each with a 4.90 mm x 6 mm nominal package size.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.