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Texas Instruments TPS54354PWPR
- Part No.:
- TPS54354PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54354PWPR.pdf
- Description:
- IC REG BUCK 1.8V 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS54354PWPR from Texas Instruments is a 1.8-V fixed-output, synchronous buck PWM converter with integrated 100-mΩ high-side MOSFET and external low-side MOSFET driver (LSG), delivering up to 3-A continuous output current at ≥90% efficiency (12 VIN/3.3 VOUT, 500 kHz). It features internal compensation, 180° out-of-phase synchronization capability, and operates across 4.5–20 V input range.
For engineers reviewing the TPS54354PWPR datasheet, TPS54354PWPR pinout, TPS54354PWPR application, or TPS54354PWPR equivalent, this device supports point-of-load regulation for FPGAs, DSPs, and microprocessors where precise 1.8-V rail stability, thermal robustness (165°C shutdown), and input ripple reduction via phase-shifted multi-rail operation are critical selection criteria.
Technical Context
The TPS54354PWPR implements feed-forward PWM modulation with constant modulator gain (8 V/V) and adaptive dead-time control to prevent shoot-through between its integrated high-side MOSFET and externally driven low-side MOSFET. Its error amplifier delivers 1.5 mA drive capability, 60 dB open-loop gain, and 2 MHz unity-gain bandwidth for fast transient response.
It supports three frequency modes: fixed 250 kHz (RT grounded), fixed 500 kHz (RT floating), or adjustable 250–700 kHz (RT resistor to AGND). The SYNC pin functions as bidirectional I/O-outputting a falling-edge signal 180° out of phase with PH when RT is grounded/floating, or accepting external falling-edge sync when RT is resistor-programmed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8 V ±1.2% over 100 mA–3 A load and −40°C to 125°C junction temperature. |
| Input voltage range | 4.5 V to 20 V - supports wide industrial/commercial supply rails including 5 V, 12 V, and 19 V adapters. |
| Continuous output current | 3 A - sustained delivery without thermal derating under proper PCB layout (PowerPAD soldered). |
| Switching frequency | 250 kHz / 500 kHz (internally set) or 250–700 kHz (externally programmed) - enables EMI optimization and inductor size trade-offs. |
| High-side rDS(on) | 100–200 mΩ @ 12 VIN - defines conduction loss and thermal rise at full load; requires BOOT capacitor (0.1 µF) for gate drive. |
| UVLO threshold | 4.49 V start / 3.69 V stop (default) - prevents startup until input stabilizes; adjustable via external resistor divider on UVLO pin. |
| Thermal shutdown | 165°C trip with 7°C hysteresis - protects against sustained overload or poor heatsinking; automatic recovery after cooldown. |
Pinout & Package
TPS54354PWPR uses a thermally enhanced 16-pin HTSSOP (PWP) PowerPAD package with exposed thermal pad connected to PGND/AGND. The PowerPAD must be soldered to a dedicated copper area with thermal vias per TI's SLMA002 guidelines for rated 3-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input power supply | Bypass with 10-µF ceramic capacitor; feeds high-side MOSFET and bias regulator. |
| 3 UVLO | Undervoltage lockout control | External resistor divider overrides default 4.49 V startup threshold; prevents premature enable. |
| 4 PWRGD | Power good status indicator | Open-drain output pulled low during fault (VSENSE <97%, overcurrent, thermal shutdown, or slow-start). |
| 5 RT | Frequency programming | Ground = 250 kHz; float = 500 kHz; resistor to AGND sets 250–700 kHz - also configures SYNC I/O mode. |
| 6 SYNC | Bidirectional synchronization | Outputs falling edge 180° out of phase with PH when RT grounded/floating; accepts falling-edge sync when RT resistor-set. |
| 7 ENA | Enable/disable control | Pulled high internally; <0.5 V disables switching and resets slow-start; no external pullup allowed. |
| 8 COMP | Error amplifier output | Internal node - no external connection permitted; connects to feedback network via VSENSE. |
| 9 VSENSE | Feedback input | Inverting input of error amp; compares output voltage (via resistor divider) to 0.891-V internal reference. |
| 10 AGND | Analog ground reference | Low-noise return for error amp, reference, and bias circuits; must connect to PowerPAD and PGND. |
| 11 PGND | Power ground return | High-current return path for LSG driver and PH node; ties to PowerPAD and AGND for thermal/electrical integrity. |
| 12 VBIAS | Internal bias supply | Stable ~7.8 V output (1 mA max); requires 1.0-µF X7R/X5R ceramic bypass capacitor. |
| 13 LSG | Low-side gate driver output | 100-mA source/sink driver for external n-channel MOSFET gate; no series resistor recommended. |
| 14, 15 PH | Phase node connection | Switching node connecting to LC filter inductor; carries high di/dt; requires short, low-inductance routing. |
| 16 BOOT | Bootstrap capacitor terminal | Connects 0.1-µF ceramic cap to PH; supplies gate drive voltage for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100-mΩ high-side MOSFET | Reduces BOM count and PCB footprint while enabling >90% efficiency at 3-A load without external high-side switch. |
| 180° out-of-phase synchronization | Enables dual-rail interleaving to halve input RMS current and reduce required bulk capacitance by √2. |
| Internally compensated control loop | Eliminates need for external compensation components - simplifies design and improves consistency across production units. |
| Adjustable undervoltage lockout (UVLO) | Allows system-level brownout protection tuning via two-resistor divider on UVLO pin, independent of default 4.49-V threshold. |
| Power good (PWRGD) with fault latching | Asserts open-drain low during any fault condition (including unpowered state), enabling reliable system power sequencing. |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying high/low-side turn-on until opposite FET gate voltage falls below 1 V. |
Applications
| FPGA Core Voltage Regulation | DSP Point-of-Load Supply |
|---|---|
|
Use Scenario: Providing stable 1.8-V core rail to Xilinx Spartan-6 or Intel Cyclone IV FPGA during configuration and high-speed logic operation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with internal MOSFET handling peak currents up to 3 A during burst-mode activity. Use Value: Delivers tight DC accuracy (±1.2%) and fast transient response to maintain FPGA timing margins under dynamic load steps. |
Use Scenario: Generating 1.8-V I/O or memory interface supply for TI C6000 DSPs in telecom baseband processing. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter synchronized to system clock via SYNC pin to minimize jitter coupling into analog sections. Use Value: Enables 180° interleaving with adjacent rails to suppress input ripple and meet stringent EMI Class B limits. |
| Industrial LCD Panel Bias | ASIC Core Power Delivery |
|
Use Scenario: Powering 1.8-V logic rails in industrial-grade LCD controllers requiring extended temperature operation (−40°C to 85°C). IC Role / Device Role / Timing Role: Robust buck converter with thermal shutdown (165°C) and UVLO hysteresis (350 mV) for reliable cold-start in factory automation environments. Use Value: Maintains regulation across 4.5–20 V input range, accommodating wide-voltage 24-V DC systems with line transients. |
Use Scenario: Delivering clean 1.8-V core voltage to mixed-signal ASICs in medical imaging modules with strict noise immunity requirements. IC Role / Device Role / Timing Role: Synchronous buck with internal compensation and feed-forward modulation to reject input ripple and suppress load-induced noise. Use Value: Achieves <10 mVPP output ripple (Figure 10) without additional post-filtering, reducing board space and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54356PWPR | Fixed 3.3-V output; identical pinout, package, and feature set except output voltage and UVLO thresholds. | Used where 3.3-V I/O or auxiliary rail is required instead of 1.8-V core rail; shares same layout and thermal design. | Select TPS54356PWPR only when 3.3-V output is needed - no circuit redesign required beyond feedback resistors (none, since fixed). |
| MP2332HG-P | Monolithic 3-A buck (no external LSG); 1.8-V fixed; 2.5–6 V input; 1.2-MHz switching; smaller QFN-10 package. | Suitable for space-constrained consumer electronics; lacks SYNC, UVLO adjust, and PowerPAD thermal performance. | Choose MP2332HG-P for compact, low-input-voltage designs where 125°C max junction and 180° sync are not required. |
Compared with TPS54354PWPR, TPS54356PWPR offers identical functionality at 3.3 V for I/O rail use, while MP2332HG-P trades programmability and thermal headroom for size and higher-frequency operation in low-voltage portable systems.
Availability
TPS54354PWPR is available at Aetrix Electronics and suitable for FPGA core regulation, DSP point-of-load conversion, industrial LCD panel biasing, and ASIC power delivery requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for TPS54354PWPR 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 ICs, with decades of expertise in high-efficiency DC/DC conversion.
The TPS5435x family was designed for medium-current, high-performance point-of-load applications in computing, industrial, and telecom systems where integration, thermal resilience, and synchronization flexibility are essential.
FAQ
What is the maximum continuous output current of the TPS54354PWPR?
The TPS54354PWPR delivers 3-A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design with PowerPAD soldered). This rating assumes 4.5–20 V input, 1.8-V output, and adequate heatsinking per TI's SLMA002 layout guidelines. Peak current limit is 4.5 A typical, but sustained operation above 3 A requires derating based on ambient temperature and copper area.
Does the TPS54354PWPR require external compensation components?
No, the TPS54354PWPR features an internally compensated control loop, eliminating the need for external Type II or Type III compensation networks. This simplifies design, reduces BOM count, and ensures consistent loop stability across manufacturing lots without tuning. Compensation is optimized for standard LC filter configurations used with its 100-mΩ high-side MOSFET.
How does the SYNC pin function on the TPS54354PWPR?
The SYNC pin on the TPS54354PWPR is bidirectional: it outputs a falling-edge signal 180° out of phase with the PH node when RT is grounded or floating (enabling interleaved operation), or accepts an external falling-edge sync signal when RT is resistor-programmed. A mandatory 10-kΩ pull-down resistor is required in all configurations to ensure reliable operation and noise immunity.
Can the TPS54354PWPR operate with only a Schottky diode instead of an external MOSFET?
Yes, the TPS54354PWPR supports diode-based operation: leave the LSG pin unconnected and place a Schottky diode from PGND to PH. An integrated pulldown MOSFET maintains light-load CCM, but inductor selection must limit peak current to <0.3 A during high-side off-time to avoid overstressing the internal device. Efficiency will be lower than with an external MOSFET.
What thermal management is required for the TPS54354PWPR at full 3-A load?
At 3-A continuous load, the TPS54354PWPR requires the PowerPAD to be soldered to a minimum 1-in² copper area with ≥6 thermal vias (0.33 mm diameter, 1.5 mm pitch) connecting to inner ground/power planes. Per TI's SLVS519A datasheet, this achieves 42.1°C/W θJA, limiting junction temperature to ≤125°C at 70°C ambient. Without soldered PowerPAD, power rating drops to 1.31 W at 70°C - insufficient for 3-A operation.
TPS54354PWPR 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:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 250kHz, 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54354PWPR FAQ
1.How can I place an order for TPS54354PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54354PWPR 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 TPS54354PWPR reliable?
The price and inventory of TPS54354PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54354PWPR is usually 5 days.
3.What payment methods are accepted for TPS54354PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54354PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54354PWPR?
TPS54354PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54354PWPR 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 TPS54354PWPR?
For technical support, including TPS54354PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54354PWPR requirements.
6.How does Aetrix verify that TPS54354PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54354PWPR 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 TPS54354PWPR meets industry standards.
7.What is the process for return or replacement of TPS54354PWPR?
All TPS54354PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54354PWPR, 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 TPS54354PWPR part is unused and in its original packaging.
Return procedure for TPS54354PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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