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Texas Instruments TPS54356PWPRG4
- Part No.:
- TPS54356PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54356PWPRG4.pdf
- Description:
- IC REG BUCK 3.3V 3A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,129
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Product details
Overview
TPS54356PWPRG4 from Texas Instruments is a 3.3-V, 3-A synchronous buck PWM converter with integrated 100-mΩ high-side MOSFET and external low-side MOSFET driver (LSG), fixed-frequency operation (250/500 kHz or adjustable 250–700 kHz), internal compensation, and 180° out-of-phase synchronization capability-designed for point-of-load regulation in FPGAs and microprocessors.
For engineers reviewing the TPS54356PWPRG4 datasheet, TPS54356PWPRG4 pinout, TPS54356PWPRG4 application, or TPS54356PWPRG4 equivalent, key selection criteria include its 4.5–20-V input range, 3.3-V ±1% output accuracy over load/temperature, thermal shutdown at 165°C, 16-pin TSSOP PowerPAD package with exposed thermal pad, and bidirectional SYNC functionality enabling multi-phase interleaving without external controllers.
Technical Context
The TPS54356PWPRG4 implements feed-forward modulator architecture with 8 V/V gain, adaptive dead-time control to prevent shoot-through, and a true voltage-mode error amplifier (60 dB open-loop gain, 2 MHz unity-gain bandwidth). Its internal slow-start ramps the 0.891-V reference over 1150 switching cycles, with programmable timing via RT pin or fixed 250/500 kHz modes.
It supports both diode-based and synchronous rectification configurations via LSG pin drive (100 mA sink/source), features an open-drain PWRGD output with 97% threshold and rising-edge delay (2–4 ms), and uses a 1.24-V UVLO threshold with 100-mV hysteresis-adjustable externally via resistive divider on UVLO pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±1% (3.234–3.366 V) across 100 mA–3 A load, 5.5–20 V input, −40°C to 125°C |
| Input Voltage Range | 4.5 V to 20 V - supports 5 V, 12 V, and 19 V rails common in industrial and computing systems |
| Switching Frequency | 250 kHz (RT grounded), 500 kHz (RT floating), or 250–700 kHz (RT resistor to AGND) - enables EMI optimization and inductor size trade-offs |
| Current Limit | Typical 4.5 A peak - provides robust overload protection while sustaining 3 A continuous output current |
| Thermal Shutdown | 165°C trip point with 7°C hysteresis - ensures safe operation under sustained high-power conditions |
| Power Good Threshold | 97% of nominal output (3.201 V) with 2 ms delay at 500 kHz - delivers precise power sequencing feedback |
| UVLO Threshold | 1.24 V start / 1.02 V stop (internal); adjustable externally - prevents startup until stable input is established |
Pinout & Package
TPS54356PWPRG4 is housed in a thermally enhanced 16-pin HTSSOP (PWP) PowerPAD™ package with exposed copper thermal pad soldered to PCB ground plane for efficient heat dissipation. The package supports up to 2.36 W power dissipation at TA = 25°C with proper board layout (2 oz. copper, thermal vias).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input supply rail | 4.5–20 V primary input; requires local 10-µF ceramic bypass capacitor |
| 3 UVLO | Undervoltage lockout control | External resistor divider overrides default 4.49 V start threshold; 1.24 V internal reference |
| 4 PWRGD | Open-drain power-good indicator | Asserts low if VSENSE < 97%, thermal fault, or current limit active; weak pull-down when unpowered |
| 5 RT | Frequency programming | Resistor to AGND sets 250–700 kHz; grounded = 250 kHz; floating = 500 kHz |
| 6 SYNC | Bidirectional sync I/O | Output mode: falling edge 180° out-of-phase with PH; input mode: falling-edge triggered sync source |
| 7 ENA | Enable control | Logic high (>0.5 V) enables operation; internal 5-µA pullup; no external pullup allowed |
| 8 COMP | Error amplifier output | Internal node - must remain unconnected per design; not for external compensation |
| 9 VSENSE | Feedback input | Inverting input of error amp; compares output to 0.891-V internal reference; connects to resistor divider from VOUT |
| 10 AGND | Analog ground reference | Low-noise analog return; must be connected to PGND and PowerPAD |
| 11 PGND | Power ground return | High-current return path for LSG driver; ties to AGND and PowerPAD |
| 12 VBIAS | Internal bias regulator output | Stable ~7.8 V supply (1 mA max); requires 1-µF X7R/X5R ceramic bypass |
| 13 LSG | Low-side gate driver output | 100 mA capable driver for external n-channel MOSFET; leave open for Schottky diode use |
| 14, 15 PH | Phase node connection | Connects to LC filter inductor; carries high dv/dt switching waveform; ties to BOOT capacitor |
| 16 BOOT | Bootstrap capacitor node | Requires 0.1-µF ceramic cap to PH; supplies gate drive for high-side MOSFET |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100-mΩ high-side MOSFET | Enables >90% efficiency at 3 A with minimal external components; eliminates need for external high-side switch |
| 180° out-of-phase synchronization | Reduces RMS input ripple current by √2 and cuts required input capacitance in dual-phase designs |
| Internally compensated voltage-mode control | Eliminates external compensation network; simplifies design while maintaining stability across wide operating conditions |
| Adaptive dead-time control | Prevents shoot-through by dynamically delaying LSG turn-on until PH voltage drops below 1 V |
| Programmable undervoltage lockout | Allows system-level brown-out protection tuning via external resistor divider on UVLO pin |
| Internal slow-start with cycle-count ramp | Soft-starts output over 1150 switching cycles (2.9 ms at 500 kHz); prevents inrush-triggered current limit hiccup |
Applications
| FPGA Point-of-Load Regulation | Industrial Microprocessor Core Supply |
|---|---|
Use Scenario: Powers 3.3-V I/O banks and auxiliary rails in Xilinx Artix-7 and Intel Cyclone V FPGAs during configuration and steady-state operation. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 3.3 V at up to 3 A with fast transient response to logic switching currents. Use Value: Internal 100-mΩ MOSFET and feed-forward modulator enable <1% output deviation during 2-A step loads, reducing need for bulk output capacitance. |
Use Scenario: Supplies core logic and peripheral interfaces in ARM Cortex-A9-based industrial HMIs operating in −40°C to 85°C ambient. IC Role / Device Role / Timing Role: Synchronous buck controller managing dynamic load changes from CPU burst activity and display backlight modulation. Use Value: 165°C thermal shutdown and 100-mA LSG driver support reliable operation under sustained 2.5-A loads with minimal heatsinking. |
| Embedded LCD Display Power | Computer Peripheral USB Hub Supply |
Use Scenario: Generates 3.3-V bias for TFT-LCD timing controllers and LED backlight drivers in medical-grade diagnostic monitors. IC Role / Device Role / Timing Role: Fixed-output buck regulator synchronized to system clock via SYNC pin to minimize EMI coupling into analog video paths. Use Value: 180° sync capability allows interleaved operation with adjacent 5-V rail converter, cutting shared input capacitor RMS current by 30%. |
Use Scenario: Provides clean 3.3-V rail for USB 2.0 hub ICs and Type-C port controllers in docking stations with multiple downstream ports. IC Role / Device Role / Timing Role: Compact, internally compensated DC-DC stage meeting USB PD specification ripple limits (<50 mVpp) at full 3-A load. Use Value: 250-kHz fixed frequency option reduces EMI filter size while maintaining <30-mVpp output ripple with 22-µF ceramic output capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54356PWPR | Same silicon, identical electrical specs; G4 suffix denotes RoHS-compliant green packaging and tape-and-reel delivery per TI spec | No functional difference; G4 variant meets stricter environmental compliance requirements for EU/China markets | Select TPS54356PWPRG4 when RoHS-6/REACH compliance and Pb-free finish are mandatory for final product certification |
| MP2335DJ-LF-P | Monolithic 3.3-V 3-A buck (no external LSG); 500 kHz fixed freq; 4.5–28 V input; smaller 8-pin SOIC package | Lacks SYNC, UVLO adjust, and LSG drive - unsuitable for multi-phase or synchronous rectification needs | Choose MP2335DJ-LF-P only for space-constrained single-rail applications where external MOSFET control and phase interleaving are unnecessary |
Compared with TPS54356PWPRG4, the TPS54356PWPR offers identical performance but lacks formal RoHS-6 documentation, while MP2335DJ-LF-P trades flexibility (no SYNC, no LSG, no UVLO adjust) for footprint reduction-making it viable only in simplified, non-interleaved, non-synchronous designs.
Availability
TPS54356PWPRG4 is available at Aetrix Electronics and suitable for FPGA power delivery, industrial microprocessor core supplies, embedded display systems, computer peripherals, and point-of-load regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS54356PWPRG4 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 and industrial-grade reliability.
The TPS5435x family was engineered for high-performance point-of-load regulation in DSPs, FPGAs, ASICs, and microprocessors-emphasizing thermal robustness, synchronization flexibility, and minimal external component count in compact packages.
FAQ
What is the maximum continuous output current supported by the TPS54356PWPRG4?
The TPS54356PWPRG4 is rated for 3-A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Its 100-mΩ high-side MOSFET and integrated thermal shutdown at 165°C enable sustained 3-A operation with adequate heatsinking via the PowerPAD. Peak current limit is typically 4.5 A, providing margin for transient loads.
Does the TPS54356PWPRG4 require external compensation components?
No, the TPS54356PWPRG4 features internally compensated voltage-mode control. The COMP pin is an internal error amplifier output and must remain unconnected-no external RC network is needed or permitted. This reduces bill-of-materials count and eliminates compensation tuning effort while maintaining stability across input voltage and load variations.
How does the SYNC pin function in the TPS54356PWPRG4, and what are its operational modes?
The SYNC pin on the TPS54356PWPRG4 operates bidirectionally: when RT is grounded or floating, SYNC acts 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 per datasheet guidance.
Can the TPS54356PWPRG4 operate with only a Schottky diode instead of an external MOSFET on the LSG pin?
Yes, the TPS54356PWPRG4 supports diode-based operation: leave the LSG pin unconnected and place a Schottky diode from PGND to PH. The device includes an integrated pulldown MOSFET to maintain continuous conduction mode at light loads. However, synchronous operation (with external n-MOSFET on LSG) improves efficiency by 3–5% at medium-to-heavy loads.
What is the purpose of the UVLO pin on the TPS54356PWPRG4, and how is it configured?
The UVLO pin on the TPS54356PWPRG4 allows customization of input voltage startup and shutdown thresholds beyond the internal defaults (4.49 V start / 3.69 V stop). By connecting an external resistor divider from VIN to AGND, designers can set precise brown-in/brown-out points-for example, configuring a 7.8-V startup threshold using a 5.36-kΩ top resistor per TI's application equations.
TPS54356PWPRG4 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):
- 3.3V
- 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
TPS54356PWPRG4 FAQ
1.How can I place an order for TPS54356PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54356PWPRG4 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 TPS54356PWPRG4 reliable?
The price and inventory of TPS54356PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54356PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54356PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54356PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54356PWPRG4?
TPS54356PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54356PWPRG4 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 TPS54356PWPRG4?
For technical support, including TPS54356PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54356PWPRG4 requirements.
6.How does Aetrix verify that TPS54356PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54356PWPRG4 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 TPS54356PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54356PWPRG4?
All TPS54356PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54356PWPRG4, 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 TPS54356PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54356PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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