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Texas Instruments TPS54350PWPRG4
- Part No.:
- TPS54350PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54350PWPRG4.pdf
- Description:
- IC REG BUCK ADJ 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
TPS54350PWPRG4 from Texas Instruments is a synchronous buck PWM converter with integrated 100 mΩ high-side MOSFET and external low-side gate driver (LSG), delivering up to 3-A continuous output current at 0.891 V to 20 V input, 250–700 kHz adjustable switching frequency, and ±1% reference accuracy - used in point-of-load regulation for FPGAs and microprocessors.
For engineers reviewing the TPS54350PWPRG4 datasheet, TPS54350PWPRG4 pinout, TPS54350PWPRG4 application, or TPS54350PWPRG4 equivalent, key selection criteria include its 16-pin TSSOP PowerPAD package, 180° synchronization capability, internal slow-start, power-good signaling, and support for both diode and synchronous rectification configurations.
Technical Context
The TPS54350PWPRG4 implements a feed-forward modulator with constant 8 V/V gain across 250–700 kHz, adaptive dead-time control to prevent shoot-through, and a true voltage-mode error amplifier (60–80 dB open-loop gain, 1–2.8 MHz unity-gain bandwidth). Its UVLO threshold is programmable via external resistor divider on UVLO pin, and SYNC pin operates bidirectionally - as output when RT is grounded/floating, or as falling-edge-triggered input when RT is resistor-set.
It integrates a 5-µA pull-up on ENA, internal digital slow-start (1150 cycles), thermal shutdown at 165°C with 7°C hysteresis, and hiccup-mode overcurrent protection triggered by high-side MOSFET VDS sensing. The VBIAS regulator supplies 7.5–8.0 V (at 1 mA) for internal analog circuitry and LSG driver, requiring a mandatory 1.0 µF ceramic bypass capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports stable regulation under sustained load for DSP/FPGA core rails. |
| Input Voltage Range | 4.5 V to 20 V - enables direct operation from 5 V, 12 V, or 19 V intermediate bus rails. |
| Reference Accuracy | ±1% at 0.891 V - ensures tight output voltage tolerance critical for low-voltage logic supply domains. |
| Switching Frequency | 250 kHz to 700 kHz (adjustable via RT resistor) - balances efficiency, size, and EMI performance. |
| High-Side RDS(on) | 100–200 mΩ at 12 V VIN - minimizes conduction loss and improves full-load efficiency. |
| Thermal Shutdown | 165°C trip with 7°C hysteresis - provides robust protection during overload or poor heatsinking. |
| Power Good Delay | 2–4 ms (frequency-dependent) - ensures reliable system sequencing before asserting PWRGD high. |
Pinout & Package
TPS54350PWPRG4 uses a thermally enhanced 16-pin HTSSOP (PWP) PowerPAD package with exposed thermal pad connected to PGND/AGND. The PowerPAD must be soldered to PCB copper for thermal and electrical integrity per TI layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 VIN | Input supply rail | Bypassed with 10-µF ceramic capacitor; powers high-side switch and bias circuits. |
| 3 UVLO | Undervoltage lockout control | External resistor divider overrides default 4.49 V start threshold for custom brown-out behavior. |
| 4 PWRGD | Open-drain power-good indicator | Asserts high impedance when VSENSE ≥ 97% of setpoint and no faults (OCP, thermal, UVLO). |
| 5 RT | Oscillator frequency programming | Resistor to AGND sets fSW = 250–700 kHz; floating/grounded selects fixed 500/250 kHz. |
| 6 SYNC | Bidirectional sync I/O | Outputs 180°-out-of-phase falling edge when RT grounded/floating; accepts falling-edge sync input when RT resistor-set. |
| 7 ENA | Enable control | Pulled high internally (5 µA); <0.5 V disables switching and resets slow-start. |
| 8 COMP | Error amplifier output | Connects to VSENSE via RC compensation network to stabilize loop response. |
| 9 VSENSE | Inverting input of error amplifier | Feedback node for output voltage divider; senses regulated output with 500 nA input bias. |
| 10 AGND | Analog ground reference | Internally isolated sensitive ground; must connect to PGND and PowerPAD. |
| 11 PGND | Power ground return | Carries high di/dt currents from LSG driver; connects to AGND and PowerPAD. |
| 12 VBIAS | Internal bias supply | 7.5–8.0 V regulated output; requires 1.0 µF X7R/X5R ceramic bypass capacitor. |
| 13 LSG | Low-side gate driver output | 100-mA capable driver for external N-MOSFET; disabled if Schottky diode used instead. |
| 14,15 PH | Phase node connection | Connects to LC filter inductor; carries high-frequency switching waveform and ripple current. |
| 16 BOOT | Bootstrap capacitor terminal | Requires 0.1 µF ceramic cap to PH; supplies gate drive voltage for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck architecture | Enables >90% efficiency at 3 A by replacing low-side diode with actively driven MOSFET. |
| 180° out-of-phase synchronization | Reduces RMS input ripple current and required bulk capacitance when paralleling two units. |
| Programmable UVLO with external divider | Allows precise brown-in/brown-out thresholds independent of internal 4.49 V default. |
| Feed-forward modulator with fixed 8 V/V gain | Maintains consistent power stage gain across full frequency range, simplifying loop compensation. |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying high/low-side turn-on until gate voltages fall below 1 V. |
Applications
| FPGA Core Supply | DSP Point-of-Load Regulation |
|---|---|
|
Use Scenario: Providing tightly regulated 1.2 V core voltage to Xilinx Artix-7 FPGA under dynamic load transients up to 2 A/µs. IC Role / Device Role / Timing Role: Primary DC-DC regulator with fast transient response enabled by voltage-mode control and 1.5 V/µs COMP slew rate. Use Value: Maintains <±1% output deviation during 0–3 A load steps, preventing logic errors or configuration loss. |
Use Scenario: Generating 1.8 V supply for TI C66x DSP in telecom baseband processing with strict EMI limits. IC Role / Device Role / Timing Role: Synchronous buck controller synchronized to system clock via SYNC pin to shift noise spectrum. Use Value: Enables 500 kHz fixed-frequency operation with 180° interleaving to reduce conducted EMI peaks by 6 dB. |
| LCD Panel Bias Supply | Industrial Peripheral Power |
|
Use Scenario: Delivering 5 V at 2 A to LCD timing controller and gate driver ICs in medical display systems. IC Role / Device Role / Timing Role: Main step-down converter with PWRGD monitoring system reset logic and thermal fault reporting. Use Value: Guarantees safe power sequencing via 4 ms PWRGD delay and automatic restart after thermal shutdown. |
Use Scenario: Powering USB hub controller, Ethernet PHY, and sensor interface in factory automation gateway. IC Role / Device Role / Timing Role: Flexible POL regulator supporting multiple output voltages via resistor-divider feedback. Use Value: Adjustable 0.891 V–20 V output range allows single BOM to support 1.5 V, 3.3 V, and 5 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543320RTVR | 4-A rated, 2.2-MHz fixed frequency, integrated dual MOSFETs, QFN-18 package | Higher current, higher frequency, smaller footprint - suited for space-constrained, high-density designs | Select when needing >3 A output or >1-MHz switching to shrink magnetics; not pin-compatible. |
| MP2332HGRT-Z | 3-A rated, 500 kHz fixed frequency, integrated high/low MOSFETs, 12-pin QFN, no SYNC or UVLO adjust | Simpler implementation, lower BOM count, but lacks synchronization and programmable UVLO | Choose for cost-sensitive, non-synchronized applications where board space and component count outweigh feature flexibility. |
Compared with TPS54350PWPRG4, TPS543320RTVR offers higher current and frequency in a different package but removes RT/SYNC configurability; MP2332HGRT-Z reduces external components but sacrifices design flexibility in frequency, sync, and UVLO tuning.
Availability
TPS54350PWPRG4 is available at Aetrix Electronics and suitable for FPGA core supplies, DSP point-of-load regulation, LCD panel bias generation, and industrial peripheral power requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for TPS54350PWPRG4 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-efficiency DC-DC conversion.
The TPS54350PWPRG4 belongs to TI's SWIFT™ family of easy-to-design, high-performance buck regulators targeting point-of-load applications in computing, industrial, and consumer electronics where efficiency, thermal performance, and design flexibility are critical.
FAQ
What is the maximum continuous output current supported by the TPS54350PWPRG4?
The TPS54350PWPRG4 delivers up to 3 A continuous output current under typical thermal conditions with proper PCB layout and heatsinking. Its integrated 100 mΩ high-side MOSFET and external LSG driver enable this rating while maintaining >90% efficiency at 12 V input to 3.3 V output. Derating applies above 70°C ambient or with insufficient copper area on the PowerPAD.
Does the TPS54350PWPRG4 require an external low-side MOSFET to operate?
No - the TPS54350PWPRG4 can operate with either an external Schottky diode (connected from PH to PGND) or an external N-channel MOSFET driven by the LSG pin. Using the diode simplifies design but reduces efficiency; using the MOSFET enables synchronous rectification and higher efficiency, especially at light loads.
How is the switching frequency configured on the TPS54350PWPRG4?
The TPS54350PWPRG4 switching frequency is set via the RT pin: grounding RT selects 250 kHz, floating RT selects 500 kHz, and connecting a resistor from RT to AGND sets frequency from 250 kHz to 700 kHz using fSW = 46000/(RRT + 35.9). This resistor also determines whether SYNC functions as input or output.
What is the purpose of the PowerPAD in the TPS54350PWPRG4 package?
The PowerPAD in the TPS54350PWPRG4 is an exposed thermal pad that must be soldered to a large PCB copper area connected to PGND and AGND. It reduces junction-to-ambient thermal resistance to 42.1°C/W (with solder), enabling reliable 3-A operation at 85°C ambient. Omitting proper PowerPAD connection risks thermal shutdown or premature failure.
Can the TPS54350PWPRG4 be synchronized to an external clock source?
Yes - when an RT resistor is used to set the switching frequency, the SYNC pin becomes a falling-edge-triggered input. It accepts external clock signals from 225 kHz to 770 kHz, with timing adjusted so the PH rising edge occurs ~360 ns after the SYNC falling edge. This enables precise multi-phase interleaving without additional timing ICs.
TPS54350PWPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.891V
- Voltage - Output (Max):
- 17.2V
- Current - Output:
- 3A
- Frequency - Switching:
- 250kHz, 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54350PWPRG4 FAQ
1.How can I place an order for TPS54350PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54350PWPRG4 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 TPS54350PWPRG4 reliable?
The price and inventory of TPS54350PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54350PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54350PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54350PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54350PWPRG4?
TPS54350PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54350PWPRG4 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 TPS54350PWPRG4?
For technical support, including TPS54350PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54350PWPRG4 requirements.
6.How does Aetrix verify that TPS54350PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54350PWPRG4 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 TPS54350PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54350PWPRG4?
All TPS54350PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54350PWPRG4, 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 TPS54350PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54350PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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