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Texas Instruments TPS54334DRCT
- Part No.:
- TPS54334DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54334DRCT.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:882
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Product details
Overview
TPS54334DRCT from Texas Instruments is a 4.2 V to 28 V input, 3 A synchronous step-down DC/DC converter with integrated 128 mΩ/84 mΩ MOSFETs, fixed 570 kHz switching frequency, 0.8 V ±1.5% reference voltage, and power-good (PGOOD) monitoring - used in industrial power supplies, LCD displays, and distributed 5 V/12 V bus regulation.
For engineers reviewing the TPS54334DRCT datasheet, TPS54334DRCT pinout, TPS54334DRCT application, or TPS54334DRCT equivalent, key selection considerations include its 10-pin VSON package with exposed thermal pad, monotonic start-up into pre-biased outputs, pulse-skipping light-load efficiency mode, hiccup-mode overcurrent protection, and thermal shutdown at 165°C.
Technical Context
The TPS54334DRCT implements fixed-frequency peak current-mode control with internal slope compensation to prevent subharmonic oscillation across duty cycles. Its transconductance error amplifier (1300 µA/V) drives the COMP pin for loop stability, while integrated boot recharge diode and BOOT-SW UVLO (2.2 V) enable reliable high-side gate drive.
Protection architecture includes cycle-by-cycle high-side current limiting (5.2 A typ), bidirectional low-side current limiting (sourcing/sinking), overvoltage detection (116% VREF), and thermal hiccup shutdown (32768-cycle restart delay). The device supports safe startup into pre-biased outputs via monotonic soft-start (2 ms) and EN pin floating-enable functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 28 V - supports wide industrial and automotive supply rails without external pre-regulation. |
| Output Current | 3 A continuous - delivers full rated load without derating at TJ ≤ 125°C with proper PCB thermal design. |
| Switching Frequency | 570 kHz (typ) - enables compact magnetics and output filtering while maintaining EMI manageability. |
| Voltage Reference | 0.8 V ±1.5% over –40°C to +150°C - ensures stable output regulation across temperature and line/load conditions. |
| Shutdown Quiescent Current | 2 µA - minimizes battery drain in always-on or standby systems. |
| Thermal Shutdown Threshold | 165°C with 10°C hysteresis - provides robust thermal margin before disabling switching and initiating hiccup recovery. |
| PGOOD Accuracy | Detects output faults at ±10% VREF window (90–110%) with open-drain output - enables reliable system power sequencing. |
Pinout & Package
TPS54334DRCT uses a 10-pin VSON (DRC) package with 3.0 mm × 3.0 mm body and exposed thermal pad on bottom for enhanced thermal performance (RθJB = 18.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input supply connection | Accepts 4.2–28 V; requires local 10 µF ceramic input capacitor for stability and transient response. |
| 2 SW | Switch node | Drives external inductor; connects to BOOT capacitor and internal high-side MOSFET source. |
| 3 GND | Power ground | Common return for power stage; must be connected to thermal pad via multiple vias. |
| 4 GND | Power ground | Second dedicated ground terminal to reduce ground bounce and improve noise immunity. |
| 5 GND | Power ground | Third ground terminal - all three GND pins share thermal pad connection for optimal heat dissipation. |
| 6 VSENSE | Feedback input | Monitors regulated output via resistor divider; referenced to 0.8 V internal bandgap. |
| 7 COMP | Error amplifier output | Connects external RC compensation network to stabilize control loop and ensure phase margin ≥45°. |
| 8 EN | Enable control | Active-high logic input; internal 1.15 µA pull-up allows floating-enable operation; threshold = 1.21 V (rising). |
| 9 BOOT | Bootstrap supply | Requires 0.1 µF X7R/X5R ceramic capacitor to SW for high-side gate drive; UVLO triggers at 2.2 V. |
| 10 PGOOD | Power-good indicator | Open-drain output; requires external 10–100 kΩ pull-up; asserts high only when VSENSE is within 90–110% of VREF. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 128 mΩ high-side / 84 mΩ low-side RDS(on) - eliminates external FETs and drivers, reducing BOM count and layout area. |
| Pulse-skipping light-load mode | Disables switching below ~0.5 A peak inductor current - improves efficiency at <10% load without audible noise. |
| Monotonic pre-biased startup | Prevents reverse current flow into powered outputs by blocking both FETs until soft-start voltage exceeds VSENSE. |
| Hiccup-mode overcurrent protection | Shuts down for 16384 cycles after 512 consecutive overcurrent events - limits average power dissipation during sustained fault. |
| Thermal and overvoltage protection | Combines 165°C junction shutdown with 116% VREF overvoltage detection - prevents damage from thermal runaway or feedback failure. |
Applications
| Industrial Power Supply | LCD Display Backlight |
|---|---|
|
Use Scenario: Regulating 12 V distributed bus to 3.3 V for PLC I/O modules and sensor interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, stable 3.3 V at up to 3 A with PGOOD signaling for system health monitoring. Use Value: Integrated MOSFETs and 570 kHz switching enable compact, thermally efficient design meeting IEC 61000-4-2/3 ESD/EMI requirements. |
Use Scenario: Powering LED driver ICs and timing controllers in 24-inch to 55-inch commercial LCD panels. IC Role / Device Role / Timing Role: Intermediate voltage rail generator converting 24 V input to 5 V or 3.3 V for display logic and interface circuitry. Use Value: Monotonic start-up prevents output voltage collapse during hot-plug events; PGOOD enables precise power sequencing with display controller ASICs. |
| Smart Meter Power Management | Car Audio DSP Supply |
|
Use Scenario: Providing isolated 3.3 V and 1.8 V rails for metrology SoCs and RF communication modules in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Main DC/DC converter powering microcontroller, ADC, and LoRaWAN transceiver under wide-input (9–28 V) battery+capacitor backup conditions. Use Value: 2 µA shutdown current extends battery life during meter sleep mode; 4.2 V UVLO ensures operation only above minimum battery threshold. |
Use Scenario: Generating 5 V supply for digital signal processors and audio codecs in OEM infotainment head units operating from 9–16 V vehicle battery. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting dynamic load steps from idle (10 mA) to full decode (2.5 A) without output droop. Use Value: Pulse-skipping mode maintains >85% efficiency at 50 mA load; thermal hiccup protection survives load dump transients per ISO 7637-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2334HG-33-LF-Z | Fixed 3.3 V output (non-adjustable); 2.5 A rating; 1.2 MHz switching; no PGOOD; smaller 2 mm × 2 mm QFN. | Suitable for space-constrained, cost-sensitive designs where output voltage is fixed and PGOOD is not required. | Select when board area is critical and 3.3 V output suffices without feedback flexibility. |
| RT6220AGQW | Adjustable output (0.6–5.5 V); 3 A rating; 600 kHz; integrated soft-start; no hiccup-mode OCP; different pinout (8-pin WDFN). | Better for designs needing wider output adjustability and simpler compensation but lacking thermal hiccup or monotonic startup. | Choose if adjustable VOUT and simplified loop compensation outweigh need for pre-biased startup and robust fault recovery. |
Compared with MP2334HG-33-LF-Z and RT6220AGQW, the TPS54334DRCT offers unique monotonic pre-biased startup, hiccup-mode overcurrent recovery, and PGOOD with tight accuracy - making it preferred for industrial and automotive systems requiring high reliability and deterministic fault behavior.
Availability
TPS54334DRCT is available at Aetrix Electronics and suitable for industrial power supplies, LCD display subsystems, and smart meter applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54334DRCT 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 DC/DC conversion.
The TPS54334DRCT belongs to TI's SWIFT™ family of integrated synchronous buck converters, designed specifically for space-constrained, high-efficiency industrial and consumer power supplies demanding robust protection and precise regulation.
FAQ
What is the recommended input capacitor for TPS54334DRCT?
The TPS54334DRCT requires a minimum 10 µF ceramic input capacitor placed close to the VIN and GND pins. A 10 µF X5R/X7R 16 V MLCC is recommended to handle ripple current and maintain stability across temperature. Additional bulk capacitance (e.g., 47–100 µF tantalum or polymer) may be added upstream for hold-up time in systems with intermittent input.
Does TPS54334DRCT support adjustable output voltage?
Yes, the TPS54334DRCT supports adjustable output voltage from 0.8 V to 24 V using an external resistor divider on the VSENSE pin. The internal 0.8 V reference sets the lower bound, and the output is calculated as VOUT = 0.8 V × (1 + R1/R2). For best accuracy, use 1% tolerance resistors and keep R1 ≤ 100 kΩ to minimize VSENSE input bias error.
How does the PGOOD function behave during startup and fault conditions for TPS54334DRCT?
For TPS54334DRCT, PGOOD asserts high only after VSENSE reaches 90–110% of 0.8 V and remains high until VSENSE falls below 84% or rises above 116%. During startup, PGOOD stays low until soft-start completes (~2 ms). It also pulls low during VIN UVLO, thermal shutdown, or EN deactivation - providing comprehensive power-health indication.
Can TPS54334DRCT operate with 100% duty cycle?
The TPS54334DRCT can sustain 100% duty cycle only if the BOOT-SW voltage remains above 2.2 V (UVLO threshold), which requires sufficient SW node switching to recharge the bootstrap capacitor. However, TI explicitly warns against operating at 100% duty cycle with no load, as boot capacitor refresh fails and high-side FET disables - so light-load operation must rely on pulse-skipping mode instead.
What thermal design practices are critical for reliable TPS54334DRCT operation at 3 A continuous load?
To sustain 3 A continuous output with TPS54334DRCT, the exposed thermal pad must be soldered to a minimum 200 mm² internal copper plane using ≥6 thermal vias (0.3 mm diameter) to inner/outer ground layers. Layout must minimize VIN/GND loop inductance, and ambient temperature should remain ≤ 70°C. Derating is required above 85°C ambient unless forced air cooling is applied.
TPS54334DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.2V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 3A
- Frequency - Switching:
- 570kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54334DRCT FAQ
1.How can I place an order for TPS54334DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54334DRCT 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 TPS54334DRCT reliable?
The price and inventory of TPS54334DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54334DRCT is usually 5 days.
3.What payment methods are accepted for TPS54334DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54334DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54334DRCT?
TPS54334DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54334DRCT 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 TPS54334DRCT?
For technical support, including TPS54334DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54334DRCT requirements.
6.How does Aetrix verify that TPS54334DRCT is sourced from the original manufacturer or authorized distributors?
All TPS54334DRCT 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 TPS54334DRCT meets industry standards.
7.What is the process for return or replacement of TPS54334DRCT?
All TPS54334DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54334DRCT, 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 TPS54334DRCT part is unused and in its original packaging.
Return procedure for TPS54334DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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