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Texas Instruments TPS54380PWPRG4
- Part No.:
- TPS54380PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54380PWPRG4.pdf
- Description:
- IC REG BUCK ADJ 3A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS54380PWPRG4 from Texas Instruments is a synchronous buck PWM converter IC designed for point-of-load regulation in high-performance digital systems. It delivers up to 3 A continuous output current with adjustable output voltage (0.9 V to 3.3 V), fixed or programmable switching frequency (350 kHz or 280–700 kHz), and integrated 60-mΩ high- and low-side MOSFETs. It supports power-up/down tracking via TRACKIN for FPGA/DSP sequencing.
For engineers reviewing the TPS54380PWPRG4 datasheet, TPS54380PWPRG4 pinout, TPS54380PWPRG4 application, or TPS54380PWPRG4 equivalent, key selection criteria include its thermal-enhanced 20-pin PWP PowerPAD package, internal error amplifier bandwidth (3–5 MHz), UVLO threshold (2.95 V), current limit trip (4–7.5 A), and power-good monitoring with 90% Vref threshold.
Technical Context
The TPS54380PWPRG4 implements a voltage-mode synchronous buck architecture with an integrated high-performance error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) enabling flexible external compensation using Type 2 or Type 3 networks. Its adaptive dead-time control prevents shoot-through by sequencing high-side and low-side MOSFET gate drivers based on real-time PH node voltage transitions.
It features cycle-by-cycle overcurrent protection with 100 ns leading-edge blanking and 200 ns total response time, thermal shutdown at 150°C with 10°C hysteresis, and a precision 0.891 V reference trimmed during manufacturing. The TRACKIN pin enables analog-based power sequencing by multiplexing the error amplifier's non-inverting input between internal reference and external ramp signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous source/sink - supports full-load operation without external current boosting. |
| Input Voltage Range | 3 V to 6 V - compatible with 3.3 V and 5 V intermediate bus architectures. |
| Switching Frequency | Fixed 350 kHz or adjustable 280–700 kHz - enables EMI optimization and inductor size trade-offs. |
| Internal Reference | 0.891 V ±0.009 V - high-precision trimmed bandgap reference enabling ±1% output regulation accuracy. |
| MOSFET rDS(on) | 59–88 mΩ (VI = 6 V) - low conduction loss supporting >90% efficiency at 3 A, 1.8 V out / 5 V in. |
| UVLO Threshold | 2.95 V start / 2.80 V stop - ensures reliable startup only after stable input rail establishment. |
| Power Good Threshold | 90% of Vref (0.802 V min) - provides accurate system reset signaling before processor core initialization. |
Pinout & Package
The TPS54380PWPRG4 is housed in a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD® package measuring 6.4 mm × 6.6 mm, with an exposed thermal pad soldered directly to AGND for efficient heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return path for compensation network, slow-start capacitor, VBIAS bypass, and RT resistor; must connect to PowerPAD. |
| VSENSE (Pin 2) | Error amplifier inverting input | Monitors regulated output voltage via resistor divider; sets feedback loop stability and regulation accuracy. |
| COMP (Pin 3) | Error amplifier output | Drives external compensation network (Type 2/3); determines loop bandwidth and transient response. |
| PWRGD (Pin 4) | Open-drain power-good indicator | Signals valid output regulation (VSENSE ≥ 90% Vref); used for processor reset or downstream enable sequencing. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Drives high-side MOSFET gate via external 0.022–0.1 µF ceramic capacitor; enables N-channel high-side switch. |
| PH (Pins 6–10) | Phase node connection | High-current switching node connecting internal MOSFETs to output inductor; requires low-inductance layout. |
| RT (Pin 20) | Oscillator frequency programming | Resistor-to-AGND sets switching frequency from 280 kHz to 700 kHz; open circuit selects 350 kHz default. |
| ENA (Pin 19) | Digital enable/disable control | TTL-compatible logic input (≥1.4 V = enable); initiates soft-start and disables all internal circuits when low. |
| TRACKIN (Pin 18) | External tracking reference input | Enables synchronized power-up/down with other regulators; controls output ramp rate during startup. |
| VBIAS (Pin 17) | Internal bias regulator output | Provides stable 2.7–2.9 V supply for internal circuitry; requires local 0.1–1.0 µF ceramic bypass to AGND. |
| VIN (Pins 14–16) | Main input power supply | Supplies both power MOSFETs and internal LDO; requires multiple 10 µF ceramic capacitors close to PGND pins. |
| PGND (Pins 11–13) | Power ground return | High-current return for low-side MOSFET and input/output capacitors; must be tied to large copper area separate from AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-mΩ MOSFETs | Eliminates external power switches and reduces board area while maintaining >90% efficiency at 3 A load. |
| Power-up/down tracking | Enables precise sequencing with other SWIFT™ regulators via TRACKIN pin-critical for multi-rail FPGA/DSP systems. |
| Thermally enhanced PowerPAD | 20-pin PWP package with exposed thermal pad dissipates up to 3.85 W at TA = 25°C without heatsink. |
| True high-performance error amplifier | 90–110 dB open-loop gain and 3–5 MHz bandwidth allow robust compensation across wide L/C combinations. |
| Programmable soft-start | Internal 25 V/ms slope or external TRACKIN control prevents inrush current and ensures controlled voltage ramp. |
Applications
| Baseband Processor Power | FPGA Core Sequencing |
|---|---|
Use Scenario: Supplying 1.2 V/2.5 A core rail to a cellular baseband processor requiring strict power-on timing relative to I/O and memory rails. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated core voltage with TRACKIN-synchronized startup. Use Value: Ensures deterministic boot sequence by matching voltage ramp rate to companion I/O regulator, preventing latch-up or configuration errors. | Use Scenario: Delivering 1.0 V/3 A to Xilinx Spartan-7 FPGA core while coordinating power-up with 3.3 V I/O bank and 1.8 V transceiver rails. IC Role / Device Role / Timing Role: Core voltage regulator implementing analog tracking via TRACKIN to match enable timing of auxiliary supplies. Use Value: Guarantees proper configuration sequence per Xilinx power sequencing requirements, avoiding configuration failure or bitstream corruption. |
| Optical Transceiver Bias | Industrial DSP Point-of-Load |
Use Scenario: Generating 2.5 V/1.8 A for laser diode bias circuitry in SFP+ optical modules where ripple and transient response impact signal integrity. IC Role / Device Role / Timing Role: High-efficiency buck converter with low-noise regulation and fast load-step response (<10 µs recovery). Use Value: Maintains <15 mV peak-to-peak output ripple under 1 A step load, preserving eye diagram margin in 10 Gbps links. | Use Scenario: Providing 1.8 V/3 A to TI C6000 DSP in ruggedized industrial control hardware operating at −40°C to 85°C ambient. IC Role / Device Role / Timing Role: Thermally robust point-of-load regulator leveraging PowerPAD and internal thermal shutdown (150°C trip). Use Value: Sustains full 3 A output without derating in sealed enclosures due to 26 °C/W junction-to-ambient thermal resistance with soldered PowerPAD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54382PWPR | Same PWP package, 3-A rating, but fixed 500 kHz frequency and no TRACKIN pin. | Lacks analog power sequencing capability; suitable only for single-rail or digitally sequenced systems. | Select when tracking is unnecessary and higher switching frequency improves filter size or EMI profile. |
| LM2678SX-3.3/NOPB | 5-A capable, but external MOSFETs required; 260 kHz fixed frequency; no integrated error amp compensation. | Requires additional gate drivers, compensation components, and layout effort; lower integration density. | Choose only when >3 A output or wider input range (8–40 V) is mandatory and board space is not constrained. |
Compared with TPS54382PWPR, the TPS54380PWPRG4 adds TRACKIN-based analog sequencing and flexible frequency programming-essential for FPGA/DSP multi-rail systems. Versus LM2678SX-3.3/NOPB, it offers full integration, smaller footprint, and superior transient response due to internal high-bandwidth error amplifier and matched MOSFETs.
Availability
TPS54380PWPRG4 is available at Aetrix Electronics and suitable for FPGA power delivery, DSP point-of-load regulation, and optical transceiver biasing requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54380PWPRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion solutions.
The TPS54380PWPRG4 belongs to TI's SWIFT™ family of dc/dc regulators, engineered specifically for high-density, low-voltage point-of-load applications in networking, communications, and high-performance computing systems.
FAQ
What is the recommended minimum input voltage for reliable startup of the TPS54380PWPRG4?
The TPS54380PWPRG4 incorporates an undervoltage lockout (UVLO) circuit with a nominal start threshold of 2.95 V. Operation begins only when VIN exceeds this value; below 2.80 V, the device remains disabled. Therefore, the recommended minimum input voltage for reliable startup is 3.0 V, ensuring margin above the 2.95 V threshold and accounting for line drop and noise.
Can the TPS54380PWPRG4 regulate output voltages below 0.9 V?
No-the TPS54380PWPRG4 is specified for output voltages from 0.9 V to 3.3 V, determined by the internal 0.891 V reference and external resistor divider. Attempting to set outputs below 0.9 V violates the minimum feedback voltage requirement and risks regulation instability or failure to reach target voltage. For sub-0.9 V applications, consider TI's TPS544B20 or similar devices with extended reference ranges.
How does the TRACKIN pin function during power-down sequencing with the TPS54380PWPRG4?
During power-down, the TPS54380PWPRG4 uses the TRACKIN pin to follow a decaying external reference voltage. When TRACKIN falls below the internal 0.891 V reference, the error amplifier's non-inverting input switches back to the internal reference, causing the output to track downward at the same rate as the external rail. This ensures coordinated, monotonic power-down across multiple rails without reverse current or latch-up.
What thermal vias are required beneath the PowerPAD of the TPS54380PWPRG4 for full 3-A operation?
For full 3-A continuous operation, the TPS54380PWPRG4 requires six 0.013-inch-diameter thermal vias within the exposed PowerPAD area and four additional 0.018-inch-diameter vias under the device body (outside the pad). These vias must connect the PowerPAD directly to a solid AGND plane, with recommended minimum top-side analog ground area of 3 inches × 3 inches using 1 oz copper to maintain junction temperature ≤125°C at TA = 70°C.
Does the TPS54380PWPRG4 support forced PWM mode to eliminate frequency variation under light load?
No-the TPS54380PWPRG4 operates exclusively in continuous conduction mode (CCM) with fixed-frequency PWM control and does not include pulse-skipping, burst-mode, or forced-PWM selection. Its oscillator runs continuously across the full load range (0–3 A), ensuring constant switching frequency for predictable EMI filtering and loop stability-ideal for noise-sensitive communication systems.
TPS54380PWPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.891V
- Voltage - Output (Max):
- 5.4V
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS54380PWPRG4 FAQ
1.How can I place an order for TPS54380PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54380PWPRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS54380PWPRG4 reliable?
The price and inventory of TPS54380PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54380PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54380PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54380PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54380PWPRG4?
TPS54380PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54380PWPRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS54380PWPRG4?
For technical support, including TPS54380PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54380PWPRG4 requirements.
6.How does Aetrix verify that TPS54380PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54380PWPRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS54380PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54380PWPRG4?
All TPS54380PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54380PWPRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS54380PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54380PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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