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Texas Instruments TPS54350MPWPREPG4
- Part No.:
- TPS54350MPWPREPG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54350MPWPREPG4.pdf
- Description:
- IC REG BUCK ADJ 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,998
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Product details
Overview
TPS54350MPWPREPG4 from Texas Instruments is a 4.5-V to 20-V input, 3-A synchronous buck PWM converter with integrated high-side MOSFET and external low-side MOSFET/diode support. It delivers 0.891 V to adjustable output voltage with ±2% accuracy, operates at 250 kHz to 700 kHz switching frequency, and features internal slow-start, power-good indication, and 180° out-of-phase synchronization-used in point-of-load regulation for FPGAs and DSPs.
For engineers reviewing the TPS54350MPWPREPG4 datasheet, TPS54350MPWPREPG4 pinout, TPS54350MPWPREPG4 application, or TPS54350MPWPREPG4 equivalent, key selection considerations include input voltage range (4.5–20 V), output current capability (3 A continuous), thermal performance in extended temperature (-55°C to +125°C), and compatibility with external low-side MOSFETs for efficiency optimization in space-constrained industrial power supplies.
Technical Context
The TPS54350MPWPREPG4 implements a voltage-mode PWM control architecture with feed-forward modulation (Km = 8 V/V) and adaptive dead-time control to prevent shoot-through between high- and low-side switches. Its error amplifier provides ≥60 dB open-loop gain and 2.8 MHz unity-gain bandwidth for stable loop response across wide load and line variations.
It supports bidirectional SYNC functionality: when RT is grounded or floating, SYNC acts as an output synchronized 180° out of phase with PH; when RT is resistor-programmed, SYNC becomes a falling-edge-triggered input for system-level clock alignment-enabling dual-phase operation to reduce input ripple RMS current and required bulk capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 20 V - supports wide industrial input rails including 5 V, 12 V, and 19 V systems without pre-regulation. |
| Output Current | 3 A continuous - sufficient for powering mid-tier FPGAs, microprocessors, and ASICs at point-of-load. |
| Output Voltage Accuracy | ±2% at 0.891 V reference - ensures tight regulation for sensitive digital core supplies. |
| Switching Frequency | 250 kHz to 700 kHz - adjustable via RT pin; enables optimization of size (higher fs) vs. efficiency (lower fs) and EMI filtering. |
| Operating Temperature | -55°C to +125°C - qualified per JEDEC/industry standards for harsh environments including aerospace and defense applications. |
| Current Limit Threshold | 3 A to 7.2 A (typ. 4.5 A) - peak-current limiting with hiccup-mode recovery prevents thermal runaway during overload or short-circuit events. |
| Thermal Shutdown | 165°C trip point with 7°C hysteresis - protects silicon integrity and enables automatic restart after cooling. |
Pinout & Package
The TPS54350MPWPREPG4 is housed in a thermally enhanced 16-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad soldered to PCB ground plane for optimal junction-to-ambient thermal resistance (42.1°C/W with proper layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2) | Main input supply connection | Bypassed with 10-µF ceramic capacitor; powers internal bias circuits and high-side FET driver. |
| UVLO (Pin 3) | Undervoltage lockout threshold adjust | External resistor divider overrides default 4.5 V start threshold; prevents premature startup under brownout. |
| PWRGD (Pin 4) | Open-drain power-good status | Asserts high-impedance when output is within 97% of target; indicates fault conditions including overcurrent, UVLO, or thermal shutdown. |
| RT (Pin 5) | Frequency programming node | Resistor to AGND sets switching frequency from 250 kHz to 700 kHz; determines SYNC I/O mode and modulator gain stability. |
| SYNC (Pin 6) | Bidirectional synchronization interface | Configurable as falling-edge input (for system clock sync) or 180° out-of-phase output (for dual-phase interleaving). |
| ENA (Pin 7) | Enable/disable control | Pulled high internally; <0.5 V disables switching and resets slow-start; no external pullup required. |
| COMP (Pin 8) | Error amplifier output | Connects to VSENSE via RC compensation network to stabilize control loop across operating conditions. |
| VSENSE (Pin 16) | Inverting input of error amplifier | Feedback node for output voltage regulation; referenced to precise 0.891 V internal bandgap. |
| LSG (Pin 13) | Low-side gate driver output | Drives external n-channel MOSFET gate; 100 mA drive strength supports fast turn-on without gate resistor. |
| PH (Pins 14, 15) | Phase node connection | Connects to LC filter inductor; carries high di/dt switching current; requires low-inductance layout. |
| BOOT (Pin 16) | High-side gate bootstrap supply | 0.1-µF ceramic capacitor between BOOT and PH provides charge for high-side driver during each cycle. |
| VBIAS (Pin 12) | Internal 7.5–8.035 V bias rail | Supplies analog circuitry and LSG driver; requires 1-µF X7R/X5R ceramic bypass capacitor. |
| AGND (Pin 10) | Analog ground reference | Internally isolated ground for sensitive analog blocks; must be tied to PGND and PowerPAD. |
| PGND (Pin 11) | Power ground return path | Carries high-current return paths from LSG driver; connects to PowerPAD and AGND for low-noise operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100 mΩ high-side MOSFET | Enables compact 3-A solution without external high-side switch; reduces BOM count and layout complexity. |
| Adjustable output down to 0.891 V | Supports modern low-voltage digital cores (e.g., 0.9 V FPGA I/O, 1.0 V processor cores) with ±2% tolerance. |
| 180° out-of-phase synchronization | Allows two TPS54350MPWPREPG4 devices to share input capacitor while halving input ripple frequency and RMS current. |
| Internal slow-start (2.3–4.6 ms) | Prevents inrush current during startup; programmable via RT pin selection to match large output capacitance requirements. |
| Enhanced product change notification | Ensures long-term supply continuity and design stability for military/aerospace programs requiring controlled baseline manufacturing. |
Applications
| Point-of-Load Regulation for FPGAs | Industrial LCD Monitor Power |
|---|---|
Use Scenario: Supplying configurable logic and I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs in programmable logic controllers. IC Role / Device Role / Timing Role: Primary DC-DC regulator delivering 1.0 V core and 1.8 V I/O rails with fast transient response to dynamic logic switching. Use Value: 3-A continuous output and 180° sync capability enable dual-rail generation with reduced input capacitor footprint and improved thermal margin. | Use Scenario: Generating 5 V and 12 V bias rails for backlight inverters and timing controllers in commercial-grade LCD monitors. IC Role / Device Role / Timing Role: Secondary buck converter stepping down 19 V adapter output to stable 5 V logic supply with PWRGD monitoring. Use Value: -55°C to +125°C qualification and robust UVLO ensure reliable cold-start and brownout immunity in uncontrolled ambient environments. |
| Computer Peripheral Power | High-Performance DSP Point-of-Load |
Use Scenario: Powering USB 3.0 host controllers, SATA bridge ICs, and PCIe endpoint regulators in embedded computing modules. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down converter replacing discrete solutions in space-constrained 2-layer PCBs. Use Value: HTSSOP PowerPAD™ package achieves 42.1°C/W θJA, enabling full 3-A output without heatsink in 70°C ambient. | Use Scenario: Delivering 1.2 V core voltage to TI C6000 DSPs in radar signal processing units requiring rapid load-step response. IC Role / Device Role / Timing Role: High-bandwidth synchronous buck regulator with 2.8 MHz error amplifier GBW and feed-forward modulation. Use Value: 180 ns minimum on-time and adaptive dead-time control maintain regulation during 2-A/µs load transients typical of burst-mode DSP execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54340BQPWPRQ1 | Automotive-grade (-40°C to +125°C), 42 V max input, 3.5 A output, fixed 350 kHz fs; no SYNC or RT pin. | Lacks 180° sync and frequency adjustability; rated for automotive AEC-Q100 but narrower temp range than TPS54350MPWPREPG4. | Select when automotive qualification is mandatory and system clock sync is unnecessary. |
| LM5116MHX/NOPB | 4.5–60 V input, 3 A, external high- and low-side MOSFETs required; no integrated high-side FET; supports constant-on-time control. | Requires more external components; better suited for ultra-wide input (e.g., 48 V telecom) but lacks PowerPAD™ thermal performance. | Select when input exceeds 20 V or constant-on-time topology is preferred for light-load efficiency. |
Compared with TPS54350MPWPREPG4, TPS54340BQPWPRQ1 trades sync/frequency flexibility for automotive qualification, while LM5116MHX/NOPB offers wider input range at the cost of higher component count and reduced thermal efficiency in compact layouts.
Availability
TPS54350MPWPREPG4 is available at Aetrix Electronics and suitable for point-of-load regulation for FPGAs, industrial LCD monitor power, computer peripheral power, and high-performance DSP point-of-load applications requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for TPS54350MPWPREPG4 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 ICs.
The TPS54350MPWPREPG4 belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for ruggedized, extended-temperature industrial and aerospace point-of-load applications where reliability, thermal performance, and synchronization capability are critical.
FAQ
What is the maximum output voltage achievable with the TPS54350MPWPREPG4?
The TPS54350MPWPREPG4 does not impose a hard upper limit on output voltage, but practical constraints arise from its maximum duty cycle (86% at VIN = 4.5 V) and minimum controllable on-time (180 ns). For example, at VIN = 12 V and fs = 500 kHz, the maximum regulated output is approximately 10 V. Output voltages above 10 V are not recommended when using SYNC input mode per datasheet guidance.
Does the TPS54350MPWPREPG4 require an external low-side MOSFET to operate?
No-the TPS54350MPWPREPG4 can operate with only an external Schottky diode connected from PH to PGND. The LSG pin may be left unconnected in this configuration. However, connecting an external n-channel MOSFET to LSG improves efficiency by replacing diode conduction losses with lower RDS(on) losses, especially at higher loads.
How is the switching frequency set on the TPS54350MPWPREPG4?
The switching frequency of the TPS54350MPWPREPG4 is set via the RT pin: grounding RT selects 250 kHz, leaving RT floating selects 500 kHz, and connecting a resistor from RT to AGND sets frequency from 250 kHz to 700 kHz per the equation fs(kHz) = 46000 / RRT(kΩ) – 35.9. This same RT configuration also determines whether SYNC functions as input or output.
What thermal derating applies to the TPS54350MPWPREPG4 at 100°C ambient?
At TA = 100°C, the TPS54350MPWPREPG4's maximum continuous output current is limited to ~1.31 A (based on 16-Pin PWP with solder thermal rating). This assumes proper PCB layout with PowerPAD™ soldered to thermal plane. Derating follows the package dissipation curve-full 3-A operation is supported only up to ~70°C ambient with standard JEDEC test board conditions.
Can the TPS54350MPWPREPG4 be used in parallel for higher current output?
Yes-the TPS54350MPWPREPG4 supports 180° out-of-phase synchronization via the SYNC pin, enabling two devices to operate interleaved. This reduces input and output ripple currents and allows shared input capacitance. Parallel operation requires matched feedback networks and careful layout to avoid current imbalance; it does not provide true current sharing without additional external circuitry.
TPS54350MPWPREPG4 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:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54350MPWPREPG4 FAQ
1.How can I place an order for TPS54350MPWPREPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54350MPWPREPG4 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 TPS54350MPWPREPG4 reliable?
The price and inventory of TPS54350MPWPREPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54350MPWPREPG4 is usually 5 days.
3.What payment methods are accepted for TPS54350MPWPREPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54350MPWPREPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54350MPWPREPG4?
TPS54350MPWPREPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54350MPWPREPG4 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 TPS54350MPWPREPG4?
For technical support, including TPS54350MPWPREPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54350MPWPREPG4 requirements.
6.How does Aetrix verify that TPS54350MPWPREPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54350MPWPREPG4 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 TPS54350MPWPREPG4 meets industry standards.
7.What is the process for return or replacement of TPS54350MPWPREPG4?
All TPS54350MPWPREPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54350MPWPREPG4, 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 TPS54350MPWPREPG4 part is unused and in its original packaging.
Return procedure for TPS54350MPWPREPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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