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Texas Instruments TPS54335ADRCT
- Part No.:
- TPS54335ADRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54335ADRCT.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
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Product details
Overview
TPS54335ADRCT from Texas Instruments is a synchronous step-down DC-DC converter with integrated 128-mΩ high-side and 84-mΩ low-side MOSFETs, delivering up to 3-A continuous output current from a 4.5-V to 28-V input. It features internal 2-ms soft-start, adjustable switching frequency (50–1500 kHz via RT pin), 0.8-V ±0.8% reference voltage, and hiccup-mode overcurrent protection. It is used in LCD displays, set-top boxes, and distributed 5/12/24-V power buses.
For engineers reviewing the TPS54335ADRCT datasheet, TPS54335ADRCT pinout, TPS54335ADRCT application, or TPS54335ADRCT equivalent, key selection considerations include its VSON-10 package thermal performance (RθJB = 18.9°C/W), RT-pin-based frequency tuning, monotonic pre-biased startup capability, and integrated boot diode eliminating external components.
Technical Context
The TPS54335ADRCT implements fixed-frequency peak current-mode control with slope compensation to prevent subharmonic oscillation across duty cycles. Its transconductance error amplifier (1300 µmhos) drives the COMP pin for loop stability, while cycle-by-cycle high-side current limiting (4–6.5 A) and low-side sourcing/sinking current limits protect against overload and reverse-current runaway.
Startup behavior is monotonic into pre-biased outputs: both MOSFETs remain off until the internal soft-start voltage exceeds VSENSE. Overvoltage transition protection disables the high-side switch when VOUT exceeds 106% of nominal and re-enables only after falling below 104%, preventing output overshoot during line/load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide industrial and consumer supply rails including 5 V, 12 V, and 24 V bus systems. |
| Output Current | 3 A continuous - enables single-chip regulation for mid-power subsystems without external current boosting. |
| Switching Frequency | 50 kHz to 1500 kHz (adjustable via RT pin) - allows trade-off between efficiency (lower fSW) and solution size (higher fSW). |
| Reference Voltage | 0.8 V ±0.8% - enables precise low-voltage output regulation (e.g., 1.0 V, 1.2 V, 1.8 V) with minimal error contribution. |
| Shutdown Quiescent Current | 2 µA - ensures ultra-low system standby power in battery-backed or energy-sensitive applications. |
| Thermal Resistance (RθJB) | 18.9°C/W - indicates efficient heat transfer to PCB ground plane, critical for sustained 3-A operation in compact layouts. |
| Soft-Start Time | 2 ms (internal, fixed) - limits inrush current during power-up, reducing stress on input capacitors and source. |
Pinout & Package
TPS54335ADRCT is housed in a 10-pin VSON package (DRC) with 3.00 mm × 3.00 mm body and exposed thermal pad. The thermal pad must be soldered to a PCB ground plane using multiple vias for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | 4.5–28 V main supply input; connects to bulk input capacitor and feeds internal regulators and gate drivers. |
| PH | Power Switch Node | Source of internal high-side MOSFET and drain of low-side MOSFET; connects to output inductor and BOOT capacitor. |
| GND | Ground Reference | Three dedicated GND pins (pins 3, 4, 5) provide low-impedance return paths for power, signal, and thermal pad connection. |
| BOOT | Bootstrap Supply | Connects to PH via 0.1-µF ceramic capacitor; supplies gate drive voltage for high-side MOSFET; monitored by UVLO (2.1 V threshold). |
| EN | Enable Control | Logic-level input (1.21 V rising threshold); floating enables device; internal 1.15-µA pullup supports default-on configuration. |
| VSENSE | Feedback Input | Inverting input of transconductance error amplifier; sets output voltage via resistor divider from VOUT; 0.8-V reference reference point. |
| COMP | Error Amplifier Output | Drives current-mode comparator; connects to external RC compensation network for loop stability and transient response tuning. |
| RT | Frequency Set | Connects to external resistor to adjust switching frequency from 50 kHz to 1500 kHz; no connection required for default ~450 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boot Recharge Diode | Eliminates need for external bootstrap diode, reducing BOM count and layout complexity in high-density designs. |
| Pulse-Skipping Light-Load Mode | Disables switching when peak inductor current falls below 0.5 A, improving efficiency at light loads without compromising regulation. |
| Hiccup-Mode Overcurrent Protection | Enters 512-cycle wait + 16384-cycle restart cycle on sustained overcurrent, preventing thermal runaway while enabling automatic recovery. |
| Monotonic Pre-Biased Startup | Prevents low-side MOSFET discharge of existing output voltage by blocking both FETs until soft-start voltage exceeds VSENSE. |
| Overvoltage Transition Protection | Clamps high-side switch during output overshoot >106%, releasing only after VOUT drops below 104%, protecting downstream ICs. |
Applications
| Consumer Display Power | Industrial Distributed Bus |
|---|---|
Use Scenario: Powering logic and backlight circuitry in 10–24-inch LCD panels within digital TVs and smart monitors. IC Role / Device Role / Timing Role: Primary buck regulator generating stable 1.2 V, 1.8 V, or 3.3 V from 12-V or 24-V input rail. Use Value: Integrated MOSFETs and 2-ms soft-start ensure clean, inrush-limited startup without display flicker or reset glitches. |
Use Scenario: Local point-of-load conversion in programmable logic controllers (PLCs) and sensor hubs fed from 24-V factory bus. IC Role / Device Role / Timing Role: Isolated 3.3-V or 5-V supply for microcontrollers, ADCs, and communication interfaces (RS-485, CAN). Use Value: RθJB = 18.9°C/W and hiccup protection enable reliable 3-A operation in unventilated enclosures up to 70°C ambient. |
| Set-Top Box Core Supply | Battery Charger Auxiliary Rail |
Use Scenario: Generating 1.0-V core voltage for ARM-based SoCs in cable modems and streaming devices. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with adjustable frequency to avoid noise coupling into RF front-end. Use Value: RT-pin tunability (50–1500 kHz) allows EMI optimization around sensitive 2.4-GHz WiFi bands. |
Use Scenario: Providing regulated 5-V auxiliary power for charging controller ICs and status LEDs in multi-cell Li-ion chargers. IC Role / Device Role / Timing Role: Secondary buck stage converting 12-V adapter output to isolated 5-V rail independent of main charge path. Use Value: 2-µA shutdown current minimizes parasitic drain during charger standby, extending shelf life of battery-powered units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54332DRCT | Lower input range (3.5–28 V), fixed 600-kHz frequency, no RT pin; 2.5-A rating; same VSON-10 package. | Lacks frequency adjustability and 3-A headroom; suitable only where 2.5-A max load and fixed fSW are acceptable. | Select if design requires simpler layout (no RT resistor) and load never exceeds 2.5 A. |
| MP2335GJ-Z | Monolithic 3-A buck with 4.5–28 V input, but uses external compensation; 0.8-V ref; no integrated boot diode; different pinout. | Requires external bootstrap diode and compensation network; higher BOM count and layout sensitivity than TPS54335ADRCT. | Consider only if cost sensitivity outweighs design simplicity and thermal performance requirements. |
Compared with TPS54332DRCT and MP2335GJ-Z, the TPS54335ADRCT uniquely combines 3-A capability, RT-adjustable frequency, integrated boot diode, and monotonic pre-bias startup-enabling robust, compact, and noise-aware power delivery in space-constrained consumer and industrial systems.
Availability
TPS54335ADRCT is available at Aetrix Electronics and suitable for LCD displays, set-top boxes, and industrial 24-V distributed power buses requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54335ADRCT 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The TPS5433xA product line was developed to deliver highly integrated, thermally robust synchronous buck converters for space-constrained consumer, industrial, and automotive applications demanding high efficiency, reliability, and ease of use.
FAQ
What is the maximum output current supported by the TPS54335ADRCT?
The TPS54335ADRCT supports up to 3 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). This rating assumes adequate copper area and via count under the exposed thermal pad to maintain RθJB ≤ 18.9°C/W. Peak current capability reaches 4.9 A before hiccup-mode overcurrent protection activates.
Does the TPS54335ADRCT require an external bootstrap diode?
No, the TPS54335ADRCT integrates a boot recharge diode, eliminating the need for an external component. A 0.1-µF X7R/X5R ceramic capacitor must still be placed between BOOT and PH pins to sustain high-side gate drive. This integration reduces BOM count and improves reliability in high-volume consumer applications.
How is the switching frequency set on the TPS54335ADRCT?
The TPS54335ADRCT uses the RT pin to set switching frequency from 50 kHz to 1500 kHz via an external resistor to ground. For example, a 100-kΩ resistor yields ~450 kHz, while 30 kΩ achieves ~1.5 MHz. No resistor results in ~450 kHz default. The TPS54335ADRCT does not support fixed-frequency operation like the TPS54336A variant.
Can the TPS54335ADRCT safely start up into a pre-biased output?
Yes, the TPS54335ADRCT implements monotonic pre-biased startup: both high-side and low-side MOSFETs remain disabled until the internal soft-start voltage exceeds the voltage present on the VSENSE pin. This prevents reverse current flow and output voltage collapse during hot-insertion or multi-rail sequencing scenarios.
What package type and thermal characteristics define the TPS54335ADRCT?
The TPS54335ADRCT uses the DRC package: a 10-pin VSON with 3.00 mm × 3.00 mm body and exposed thermal pad. Its key thermal metric is RθJB = 18.9°C/W, indicating efficient heat conduction to the PCB. Proper soldering of the thermal pad to a multi-via ground plane is mandatory to sustain 3-A operation at elevated ambient temperatures.
TPS54335ADRCT 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):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 3A
- Frequency - Switching:
- 50kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54335ADRCT FAQ
1.How can I place an order for TPS54335ADRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54335ADRCT 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 TPS54335ADRCT reliable?
The price and inventory of TPS54335ADRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54335ADRCT is usually 5 days.
3.What payment methods are accepted for TPS54335ADRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54335ADRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54335ADRCT?
TPS54335ADRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54335ADRCT 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 TPS54335ADRCT?
For technical support, including TPS54335ADRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54335ADRCT requirements.
6.How does Aetrix verify that TPS54335ADRCT is sourced from the original manufacturer or authorized distributors?
All TPS54335ADRCT 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 TPS54335ADRCT meets industry standards.
7.What is the process for return or replacement of TPS54335ADRCT?
All TPS54335ADRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54335ADRCT, 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 TPS54335ADRCT part is unused and in its original packaging.
Return procedure for TPS54335ADRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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