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Texas Instruments TPS54353PWPG4
- Part No.:
- TPS54353PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54353PWPG4.pdf
- Description:
- IC REG BUCK 1.5V 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,581
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Product details
Overview
TPS54353PWPG4 from Texas Instruments is a 1.5 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), operating from 4.5 V to 20 V input, featuring 500 kHz default switching frequency, internal slow-start (2.00 ms), and power-good (PWRGD) monitoring - used in point-of-load regulation for FPGAs and microprocessors.
For engineers reviewing the TPS54353PWPG4 datasheet, TPS54353PWPG4 pinout, TPS54353PWPG4 application, or TPS54353PWPG4 equivalent, key selection considerations include its 16-pin TSSOP PowerPAD package, 180° synchronization capability, adjustable UVLO, thermal shutdown at 165°C, and compatibility with external Schottky diodes or N-channel MOSFETs for efficiency optimization.
Technical Context
The TPS54353PWPG4 implements a feed-forward modulator with constant 8 V/V gain across input voltage range, enabling stable transient response. Its adaptive dead-time control prevents shoot-through by sequencing LSG and PH driver turn-on based on gate voltage thresholds (<1 V), while the bidirectional SYNC pin supports both master (output) and slave (input) 180° out-of-phase operation when paired with another TPS5435x device.
It integrates a precision 0.891 V reference trimmed during production, error amplifier with 2 MHz unity-gain bandwidth and 1.5 mA drive, and hiccup-mode overcurrent protection triggered at 3.3–6.5 A (typ. 4.5 A) with 4.5 ms recovery time at 500 kHz. The internal slow-start ramps the reference over 1150 switching cycles, with timing scaled by device-specific factor n = 1.2 for TPS54353.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±1.5% (1.47–1.53 V over load/temperature), enabling direct regulation of core logic rails without external feedback resistors. |
| Continuous Output Current | 3 A, supported by 100 mΩ high-side MOSFET (VIN = 12 V) and 100 mA LSG driver, suitable for mid-power FPGA I/O or DSP core supplies. |
| Input Voltage Range | 4.5 V to 20 V, covering 5 V, 12 V, and 19 V adapter inputs - compatible with industrial and commercial DC bus systems. |
| Switching Frequency | Default 500 kHz (RT pin floating), adjustable 250–700 kHz via RT resistor; higher frequencies reduce output inductor size but increase switching loss. |
| Thermal Shutdown | Trips at 165°C junction temperature with 7°C hysteresis, protecting against sustained overload or poor PCB thermal design. |
| Power Good Threshold | 97% of nominal output (1.455 V), with rising-edge delay of 2 ms at 500 kHz, providing reliable system reset signaling during startup. |
| UVLO Start/Stop | Internally set to 4.49 V start / 3.69 V stop (TPS54352–6 family), adjustable via external resistor divider on UVLO pin for custom brown-out behavior. |
Pinout & Package
TPS54353PWPG4 uses a thermally enhanced 16-pin HTSSOP (PWP) PowerPAD package with exposed thermal pad soldered to PGND/AGND plane for improved heat dissipation (θJA = 42.1°C/W with soldered pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input supply rail | Accepts 4.5–20 V; requires local 10-µF ceramic bypass capacitor to minimize input ripple and EMI. |
| 3 UVLO | Undervoltage lockout control | Overrides internal 4.49 V start threshold via external resistor divider; prevents premature startup under weak input conditions. |
| 4 PWRGD | Open-drain power-good indicator | Sinks current when output is <97% of 1.5 V or fault occurs; interfaces directly to µC reset inputs or FPGA configuration logic. |
| 5 RT | Frequency programming node | Ground = 250 kHz, float = 500 kHz, resistor-to-AGND sets 250–700 kHz; also configures SYNC pin direction. |
| 6 SYNC | Bidirectional sync I/O | Outputs falling-edge signal 180° out-of-phase with PH when RT is grounded/floating; accepts falling-edge external clock when RT resistor is used. |
| 7 ENA | Enable/disable control | Pulled high internally; <0.5 V disables switching and resets slow-start; no external pullup required. |
| 8 COMP | Error amplifier output | Internal node - must remain unconnected; not for external compensation. |
| 9 VSENSE | Feedback input | Inverting input of error amp; connected to resistor divider from VOUT to GND in adjustable versions - unused in fixed 1.5 V TPS54353. |
| 10 AGND | Analog ground reference | Low-noise return for internal analog circuits; must be tied to PGND and PowerPAD with short traces. |
| 11 PGND | Power ground return | High-current return path for LSG driver and internal MOSFET; connects to PowerPAD and AGND. |
| 12 VBIAS | Internal 8-V bias supply | Provides gate drive for LSG and internal analog blocks; requires 1.0-µF X7R/X5R ceramic bypass capacitor. |
| 13 LSG | Low-side gate driver output | Drives external N-MOSFET gate (100 mA sink/source); enables synchronous rectification for >90% efficiency at full load. |
| 14, 15 PH | Phase node connection | Connects to LC filter inductor; carries high dv/dt switching waveform - layout critical for EMI control. |
| 16 BOOT | Bootstrap capacitor node | Requires 0.1-µF ceramic cap between BOOT and PH to charge high-side gate driver; essential for proper high-side FET operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 100 mΩ RDS(on) at VIN = 12 V enables 3-A continuous output without external high-side switch, reducing BOM count and layout area. |
| Synchronous buck topology support | LSG pin drives external low-side N-MOSFET, eliminating Schottky conduction loss and improving full-load efficiency by up to 5% vs. diode-based designs. |
| 180° out-of-phase synchronization | SYNC pin allows two TPS54353PWPG4 devices to interleave, halving input ripple RMS current and reducing required input capacitance by ~30%. |
| Internally compensated control loop | No external compensation components needed for stable operation with standard output capacitors, accelerating design cycle for point-of-load applications. |
| Hiccup-mode overcurrent protection | Disables high-side FET and resets slow-start upon current limit violation (>4.5 A typ.), then auto-retries after 4.5 ms - prevents thermal runaway during short-circuit events. |
Applications
| Industrial Point-of-Load Regulation | FPGA Core Supply |
|---|---|
|
Use Scenario: Regulating 1.5 V for Spartan-7 or Artix-7 FPGA I/O banks in programmable logic controllers with 12 V backplane input. IC Role / Device Role / Timing Role: Primary DC-DC buck controller delivering regulated 1.5 V at up to 3 A with fast transient response to logic state changes. Use Value: Internal 100 mΩ MOSFET and feed-forward modulation maintain <±1% output deviation during 2-A step load transients, ensuring signal integrity. |
Use Scenario: Powering 1.5 V auxiliary rails in Xilinx Zynq-7000 SoC-based embedded vision systems with tight thermal constraints. IC Role / Device Role / Timing Role: Synchronous buck converter with LSG-driven external MOSFET, enabling >92% efficiency at 2.5 A and reducing heatsink requirements. Use Value: 500 kHz switching frequency allows use of compact 2.2-µH shielded inductors, minimizing board space while meeting CISPR-22 Class B EMI limits. |
| Computer Peripheral Power | LCD Monitor Logic Supply |
|
Use Scenario: Generating 1.5 V for USB 3.0 hub controllers and PCIe switch logic in docking stations powered from 19 V adapters. IC Role / Device Role / Timing Role: Fixed-output buck regulator with PWRGD monitoring, coordinating power sequencing with host system firmware. Use Value: Power-good assertion within 2 ms of stable output enables deterministic boot timing and eliminates need for external supervisor ICs. |
Use Scenario: Supplying 1.5 V to timing controller (TCON) ICs and LVDS transmitter logic in 24-inch LCD monitors with 12 V input. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter synchronized to system clock via SYNC pin to suppress beat-frequency noise in display video signals. Use Value: 180° interleaving with second TPS54353PWPG4 reduces input capacitor ripple current by 40%, allowing smaller 22-µF X7R ceramics instead of larger electrolytics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54353PWPR | Same die and electrical specs; differs only in tape-and-reel packaging (R suffix) versus tube (G4 suffix). | No functional difference; selected for automated SMT assembly vs. manual/hand-solder prototyping. | Choose TPS54353PWPR for volume production; TPS54353PWPG4 for evaluation or low-volume builds. |
| MP2359DJ-LF-P | Monolithic 3-A buck with 150 mΩ HS-FET, fixed 1.5 V, 500 kHz, but lacks SYNC, LSG, and PWRGD pins; no UVLO adjustment. | Suitable for cost-sensitive, space-constrained applications where synchronization and power sequencing are unnecessary. | Use MP2359DJ-LF-P only if 180° sync, external MOSFET control, or precise power-good signaling are not required. |
Compared with TPS54353PWPG4, TPS54353PWPR offers identical performance in reel format for pick-and-place lines, while MP2359DJ-LF-P trades advanced features like SYNC and LSG for lower BOM cost and smaller 8-pin SOIC package - making it viable only in simplified, non-interleaved, non-sequenced designs.
Availability
TPS54353PWPG4 is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based edge AI accelerators, and LCD monitor TCON modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for TPS54353PWPG4 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 TPS5435x product line was designed specifically for medium-current, high-efficiency point-of-load DC-DC conversion in space-constrained industrial, computing, and display systems - emphasizing thermal robustness, synchronization flexibility, and ease of design-in.
FAQ
What is the input voltage range supported by the TPS54353PWPG4?
The TPS54353PWPG4 supports an input voltage range of 4.5 V to 20 V, validated across the full operating junction temperature range (−40°C to +125°C). This range accommodates common industrial DC bus voltages including 5 V, 12 V, and 19 V adapter outputs. Operation below 4.5 V triggers undervoltage lockout, preventing unstable regulation.
Does the TPS54353PWPG4 require external compensation components?
No, the TPS54353PWPG4 is internally compensated and does not require external compensation components on the COMP pin. The error amplifier and modulator are optimized for stability with standard output capacitor types (e.g., 22–100 µF ceramic or polymer), simplifying design and reducing bill-of-materials count for fixed 1.5 V applications.
Can the TPS54353PWPG4 drive an external low-side MOSFET?
Yes, the TPS54353PWPG4 provides a dedicated LSG pin capable of sourcing/sinking 100 mA to drive the gate of an external N-channel MOSFET. This enables synchronous rectification, improving full-load efficiency by replacing the body diode or Schottky diode with a low-RDS(on) MOSFET - a key advantage over diode-based buck controllers.
How does the SYNC pin function on the TPS54353PWPG4?
The SYNC pin on the TPS54353PWPG4 is bidirectional: when the RT pin is grounded or floating, SYNC operates as a falling-edge output synchronized 180° out-of-phase with the PH node; when RT is configured with a resistor, SYNC becomes a falling-edge input for external clock synchronization. A mandatory 10-kΩ pull-down resistor is required in all configurations.
What thermal protection features does the TPS54353PWPG4 include?
The TPS54353PWPG4 includes thermal shutdown that disables the MOSFET drivers and controller when junction temperature exceeds 165°C, with automatic restart once temperature falls to 158°C (7°C hysteresis). This protects against sustained overload, inadequate heatsinking, or ambient temperature excursions beyond rated limits.
TPS54353PWPG4 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):
- 1.5V
- 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
TPS54353PWPG4 FAQ
1.How can I place an order for TPS54353PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54353PWPG4 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 TPS54353PWPG4 reliable?
The price and inventory of TPS54353PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54353PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54353PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54353PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54353PWPG4?
TPS54353PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54353PWPG4 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 TPS54353PWPG4?
For technical support, including TPS54353PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54353PWPG4 requirements.
6.How does Aetrix verify that TPS54353PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54353PWPG4 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 TPS54353PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54353PWPG4?
All TPS54353PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54353PWPG4, 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 TPS54353PWPG4 part is unused and in its original packaging.
Return procedure for TPS54353PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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