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Texas Instruments TPS54354PWPG4
- Part No.:
- TPS54354PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54354PWPG4.pdf
- Description:
- IC REG BUCK 1.8V 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,850
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Product details
Overview
TPS54354PWPG4 from Texas Instruments is a 1.8-V fixed-output, 3-A continuous synchronous buck PWM converter with integrated 100-mΩ high-side MOSFET and external low-side MOSFET driver (LSG pin). It operates from 4.5 V to 20 V input, supports 250 kHz or 500 kHz fixed switching frequency, and delivers regulated output for point-of-load applications in FPGAs and DSPs.
For engineers reviewing the TPS54354PWPG4 datasheet, TPS54354PWPG4 pinout, TPS54354PWPG4 application, or TPS54354PWPG4 equivalent, key selection criteria include its 1.8-V ±1% output accuracy at 3 A, internal slow-start time of 4.6 ms (250 kHz) / 2.3 ms (500 kHz), 16-pin TSSOP PowerPAD package with thermal pad, and bidirectional SYNC for 180° out-of-phase synchronization.
Technical Context
The TPS54354PWPG4 implements feed-forward PWM modulation with constant modulator gain (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 MHz unity-gain bandwidth, enabling fast transient response under load steps.
It integrates undervoltage lockout (UVLO) with 4.49 V start/3.69 V stop thresholds, thermal shutdown at 165°C with 7°C hysteresis, and peak current limiting (typ. 4.5 A). The LSG pin drives external n-channel MOSFETs, while the BOOT–PH bootstrap circuit sustains high-side gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% over 100 mA–3 A load and −40°C to 125°C junction temperature |
| Input Voltage Range | 4.5 V to 20 V - supports 5 V, 12 V, and 19 V intermediate bus rails |
| Continuous Output Current | 3 A - sustained without thermal derating on PCB with soldered PowerPAD |
| Switching Frequency | 250 kHz or 500 kHz (internally set); no external RT resistor required for fixed operation |
| High-Side rDS(on) | 100–200 mΩ at VIN = 12 V - enables >90% efficiency at 3 A (VI = 12 V, VO = 1.8 V) |
| Thermal Shutdown | 165°C trip point with 7°C hysteresis - auto-restarts after cooldown, protecting against sustained overload |
| Power Good (PWRGD) | Open-drain output asserting low when VSENSE < 97% of target - provides system-level power sequencing feedback |
Pinout & Package
TPS54354PWPG4 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 PCB copper area with thermal vias for rated 3-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2) | Input supply rail | 4.5–20 V primary input; requires local 10-µF ceramic bypass capacitor |
| UVLO (Pin 3) | Undervoltage lockout adjust | External resistor divider overrides default 4.49 V start threshold |
| PWRGD (Pin 4) | Power good status indicator | Open-drain output pulled low during fault conditions (UVLO, OCP, thermal) |
| RT (Pin 5) | Frequency setting | Grounded → 250 kHz; floating → 500 kHz; resistor to AGND → 250–700 kHz |
| SYNC (Pin 6) | Bidirectional sync I/O | Output mode: falling edge 180° out-of-phase with PH; input mode: falling-edge triggered sync |
| ENA (Pin 7) | Enable control | Logic high (>0.5 V) enables regulation; internal 5-µA pullup allows float-to-enable |
| COMP (Pin 8) | Error amplifier output | Internal node - no external connection permitted |
| VSENSE (Pin 9) | Feedback input | Inverting input of error amp; connects to resistor divider from VOUT to GND |
| AGND (Pin 10) | Analog ground reference | Low-noise analog return; must connect to PowerPAD and PGND |
| PGND (Pin 11) | Power ground return | High-current return path for LSG driver; ties to PowerPAD and AGND |
| VBIAS (Pin 12) | Internal bias regulator output | Stable ~7.8 V supply for internal circuits and LSG driver; requires 1-µF ceramic bypass |
| LSG (Pin 13) | Low-side gate driver output | 100-mA sink/source driver for external n-MOSFET; no series gate resistor needed |
| PH (Pins 14,15) | Phase node | Switching node connecting to LC filter inductor; carries high di/dt current |
| BOOT (Pin 16) | Bootstrap capacitor connection | Connects 0.1-µF ceramic cap to PH; supplies gate drive voltage for high-side MOSFET |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 100-mΩ rDS(on) enables compact 3-A design without external high-side switch |
| 180° out-of-phase synchronization | Reduces RMS input ripple current by √2 when two units are synchronized, cutting input capacitance needs |
| Internally compensated control loop | Eliminates need for external compensation components - simplifies layout and reduces BOM count |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying LSG turn-on until PH voltage drops below 1 V |
| Programmable UVLO with hysteresis | Enables custom input start/stop thresholds (e.g., 7.8 V start) using external resistors, improving system robustness |
| Internal slow-start with adjustable timing | 4.6 ms (250 kHz) / 2.3 ms (500 kHz) ramp prevents inrush current tripping OCP during startup |
Applications
| Point-of-Load Regulation for FPGA Core | Industrial DSP Power Supply |
|---|---|
|
Use Scenario: Powers 1.8-V core rail of Xilinx Spartan-7 or Intel Cyclone V FPGA during configuration and active operation. IC Role / Device Role / Timing Role: Primary DC-DC regulator delivering tightly regulated 1.8 V at up to 3 A with fast transient response to logic switching currents. Use Value: Internal 100-mΩ MOSFET and 2-MHz error amplifier bandwidth maintain <±1% output deviation during 2-A step loads with <10-µs recovery. |
Use Scenario: Supplies 1.8-V I/O or memory interface rail for TI C6000 DSPs in motor control or signal acquisition systems. IC Role / Device Role / Timing Role: Synchronous buck controller managing dynamic load transients from burst-mode data transfers. Use Value: 180° SYNC capability allows dual-phase operation with shared input capacitor, reducing board area and EMI filtering requirements. |
| Embedded Microprocessor Core Rail | Commercial LCD Display Logic Supply |
|
Use Scenario: Generates 1.8-V core voltage for ARM Cortex-A53 or RISC-V SoCs in industrial gateways. IC Role / Device Role / Timing Role: Fixed-output buck converter providing stable core power with PWRGD signaling for safe boot sequencing. Use Value: PWRGD open-drain output asserts low during UVLO, thermal fault, or OCP - enabling reliable system reset coordination. |
Use Scenario: Powers timing controller and TCON logic in 24-inch LCD monitors operating from 12-V wall adapter input. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator minimizing heat in space-constrained display enclosures. Use Value: PowerPAD package achieves 1.31 W power rating at 70°C ambient - sustains 3-A output without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54354PWPR | Same silicon and pinout; supplied in tape-and-reel (R-suffix) instead of tube (G4-suffix) | No functional difference - identical electrical specs and thermal performance | Select TPS54354PWPR for automated SMT assembly; TPS54354PWPG4 for prototyping or low-volume hand-soldering |
| TPS54356PWPG4 | Same family, but fixed 3.3-V output; shares identical pinout, package, and feature set | Requires redesign of feedback network and output capacitor selection - not drop-in compatible | Choose TPS54356PWPG4 only when 3.3-V output is required; not suitable as direct replacement for 1.8-V use cases |
Compared with TPS54354PWPG4, the PWPR variant offers identical performance in reel format for production lines, while TPS54356PWPG4 serves distinct 3.3-V applications but demands full schematic and layout validation due to different output voltage and associated component values.
Availability
TPS54354PWPG4 is available at Aetrix Electronics and suitable for FPGA core power, industrial DSP supplies, embedded microprocessor rails, and commercial LCD display logic requiring stable component supply across automotive-qualified temperature ranges and long-lifecycle programs.
Supply support for TPS54354PWPG4 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 product line was designed specifically for medium-current, high-efficiency point-of-load regulation in space-constrained systems such as FPGAs, DSPs, ASICs, and microprocessors - emphasizing thermal performance, integration, and ease of design.
FAQ
What is the output voltage tolerance of the TPS54354PWPG4 over full load and temperature?
The TPS54354PWPG4 delivers 1.8 V with ±1% tolerance across 100 mA to 3 A output current and −40°C to +125°C junction temperature. At 25°C and 100 mA–3 A, output voltage remains within 1.782 V to 1.818 V; over full temperature and load, it stays within 1.764 V to 1.836 V per TI SLVS519A datasheet Section 4.
Does the TPS54354PWPG4 require an external low-side MOSFET to operate?
Yes - the TPS54354PWPG4 integrates only the high-side MOSFET and requires an external n-channel MOSFET connected to the LSG pin for synchronous rectification. Alternatively, a Schottky diode may be used from PH to PGND, though efficiency drops at higher loads. The LSG driver provides 100 mA sink/source capability optimized for common logic-level MOSFETs.
How does the SYNC pin function on the TPS54354PWPG4, and what is its timing relationship to the PH pin?
The SYNC pin on the TPS54354PWPG4 is bidirectional: when RT is grounded or floating, it outputs a falling-edge signal approximately 180° out of phase with the rising edge of the PH pin. When RT is set via resistor, SYNC becomes a falling-edge-triggered input. This enables precise interleaving of multiple converters to reduce input ripple and improve thermal distribution.
What thermal performance can be expected from the TPS54354PWPG4 in a standard PCB layout?
With the PowerPAD soldered to a 2-oz copper thermal pad (3″ × 3″) and six thermal vias, the TPS54354PWPG4 achieves 42.1°C/W junction-to-ambient thermal impedance. At 70°C ambient, it supports 1.31 W dissipation - sufficient for 3-A operation at 12-V input and 1.8-V output with >90% efficiency, per TI's package dissipation ratings in SLVS519A Section 2.
Can the TPS54354PWPG4 be used without connecting the COMP pin?
Yes - the COMP pin on the TPS54354PWPG4 is an internal error amplifier output and must remain unconnected. TI explicitly states "Do NOT connect ANYTHING to this pin" in the Pin Functions table (SLVS519A p.7). Any external connection risks instability or damage, as COMP is not intended for external compensation or monitoring.
TPS54354PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TPS54354PWPG4 FAQ
1.How can I place an order for TPS54354PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54354PWPG4 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 TPS54354PWPG4 reliable?
The price and inventory of TPS54354PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54354PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54354PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54354PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54354PWPG4?
TPS54354PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54354PWPG4 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 TPS54354PWPG4?
For technical support, including TPS54354PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54354PWPG4 requirements.
6.How does Aetrix verify that TPS54354PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54354PWPG4 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 TPS54354PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54354PWPG4?
All TPS54354PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54354PWPG4, 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 TPS54354PWPG4 part is unused and in its original packaging.
Return procedure for TPS54354PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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