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Texas Instruments TPS54335-2ADRCT
- Part No.:
- TPS54335-2ADRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54335-2ADRCT.pdf
- Description:
- IC REG BUCK ADJ 2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
TPS54335-2ADRCT 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 across a 4.5-V to 28-V input range. It features adjustable switching frequency (50 kHz–1.5 MHz), 0.8-V ±0.8% reference voltage, 2-ms internal soft-start, and hiccup-mode overcurrent protection-used in industrial power supplies, LCD displays, and distributed 5/12/24-V bus systems.
For engineers reviewing the TPS54335-2ADRCT datasheet, TPS54335-2ADRCT pinout, TPS54335-2ADRCT application, or TPS54335-2ADRCT equivalent, key selection considerations include its VSON-10 package thermal performance (RθJA = 43.9°C/W), monotonic pre-biased startup capability, pulse-skipping light-load efficiency, and BOOT-PH UVLO threshold of 2.1 V (typical).
Technical Context
This device implements constant-frequency peak current-mode control with cycle-by-cycle high-side MOSFET current limiting (4.0–6.5 A) and low-side sourcing/sinking current limits (3.5–6.1 A / 0 A). The error amplifier has 1300 µA/V transconductance and drives the COMP pin for external frequency compensation.
It integrates a boot regulator with UVLO monitoring (2.1 V min BOOT-PH), overvoltage transition protection (106% trip, 104% recovery), and thermal shutdown at 175°C with 10°C hysteresis. Startup is monotonic into pre-biased outputs via internal soft-start ramp and VSENSE voltage comparison.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide industrial and automotive supply rails without external pre-regulation |
| Output Current | 3 A continuous - enables single-chip conversion for mid-power applications like STB or smart meters |
| Switching Frequency | 50 kHz to 1.5 MHz adjustable via RT resistor - allows optimization of size (high-freq) vs. EMI/efficiency (low-freq) |
| Voltage Reference | 0.8 V ±0.8% at TJ = 25°C - ensures tight output regulation accuracy for sensitive loads like FPGAs or ADCs |
| Quiescent Current | 2 µA in shutdown - minimizes battery drain in always-on systems such as IoT sensors or backup power |
| Thermal Shutdown | 175°C typical with 10°C hysteresis - protects against sustained overload or poor PCB thermal design |
| Package | VSON-10 (3.0 mm × 3.0 mm) with exposed thermal pad - provides low RθJB = 18.9°C/W for high-power density layouts |
Pinout & Package
The TPS54335-2ADRCT is housed in a 10-pin VSON package (3.0 mm × 3.0 mm) with an exposed thermal pad that must be soldered to a PCB ground plane using multiple vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | 4.5–28 V main supply rail; connects to bulk input capacitor and bypass network |
| NC | No Connect | Pin 2 is internally unconnected - must remain floating or grounded per layout guidelines |
| PH | Power Switch Node | Source of high-side MOSFET and drain of low-side MOSFET - connects directly to output inductor |
| GND (Pins 4 & 5) | Ground Reference | Dual ground pins reduce impedance; both must connect to PCB ground plane and thermal pad |
| RT | Frequency Set | Connects to external resistor to set switching frequency; tolerance affects accuracy of fSW |
| BOOT | Bootstrap Supply | Drives high-side gate via external 0.1-µF ceramic capacitor between BOOT and PH |
| EN | Enable Control | Logic-level enable with 1.21–1.28 V rising threshold; internal pullup allows float-to-enable operation |
| COMP | Error Amplifier Output | Drives external RC compensation network to stabilize loop response and phase margin |
| VSENSE | Feedback Input | Inverting input of transconductance amplifier; connects to resistor divider from VOUT for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Monotonic Pre-Biased Startup | Prevents reverse current flow during power-up into already charged outputs - critical for hot-swap and redundant supply systems |
| Pulse-Skipping Light-Load Mode | Disables switching below ~0.5 A peak inductor current - improves efficiency at standby without requiring external control logic |
| Integrated Boot Recharge Diode | Eliminates need for external bootstrap diode - reduces BOM count and layout complexity in compact designs |
| Hiccup-Mode Overcurrent Protection | Shuts down for 16384 cycles after 512 consecutive overcurrent events - limits average power dissipation during sustained fault conditions |
| Overvoltage Transition Protection | Turns off high-side MOSFET when VOUT exceeds 106% nominal and resumes only after falling below 104% - suppresses overshoot during load transients |
Applications
| Industrial Power Supplies | LCD Display Backlight Drivers |
|---|---|
Use Scenario: Providing regulated 5-V or 12-V rails for PLC I/O modules and sensor interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable, low-noise DC power with fast transient response to varying load steps. Use Value: Integrated MOSFETs and current-mode control enable <3-A output in minimal board area while maintaining ±1% output regulation over temperature. | Use Scenario: Generating adjustable bias voltages for LED driver ICs in commercial LCD panels and digital signage. IC Role / Device Role / Timing Role: Adjustable-output DC-DC stage setting precise backlight supply voltage via external resistor divider on VSENSE. Use Value: 0.8-V reference accuracy (±0.8%) and monotonic startup ensure consistent brightness control without display flicker during power sequencing. |
| Smart Meter Power Management | Distributed 24-V Bus Converters |
Use Scenario: Converting 24-V utility-supplied input to isolated 3.3-V logic rail for microcontroller and RF communication subsystems. IC Role / Device Role / Timing Role: High-efficiency intermediate converter operating continuously under wide ambient temperature (–40°C to 125°C). Use Value: 2-µA shutdown current extends battery backup life; thermal shutdown (175°C) ensures reliability in sealed meter enclosures. | Use Scenario: Point-of-load conversion from 24-V chassis bus to 5-V or 3.3-V rails for embedded controllers in networking equipment. IC Role / Device Role / Timing Role: Compact, thermally robust buck regulator supporting high-density PCB layouts with minimal heatsinking. Use Value: VSON-10 package with exposed thermal pad achieves RθJB = 18.9°C/W - sustains full 3-A load at 70°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543320RHLT | Higher 4-A output rating; 2.2-MHz max fSW; requires external bootstrap diode; different pinout | Better suited for higher-current or space-constrained designs needing >3 A; not pin-compatible | Select if output current >3 A required and layout can accommodate revised pin mapping and external diode |
| MP2335GJ-Z | 3-A rating; 4.5–28-V input; fixed 500-kHz fSW; no RT pin; smaller 8-pin SOIC package | Lower component count for fixed-frequency designs; lacks frequency adjustability and hiccup-mode OCP | Choose for cost-sensitive, non-adjustable applications where thermal performance is less critical than footprint |
Compared with TPS54335-2ADRCT, TPS543320RHLT offers higher current and frequency but demands layout redesign, while MP2335GJ-Z simplifies design with fixed frequency and smaller package at the expense of configurability and advanced protection features.
Availability
TPS54335-2ADRCT is available at Aetrix Electronics and suitable for industrial power supplies, LCD display backlights, and smart meter power management requiring stable component supply and long-term production continuity.
Supply support for TPS54335-2ADRCT 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 over 90 years of innovation in high-reliability components.
The TPS54335-2A product line delivers highly integrated, thermally optimized synchronous buck converters for industrial, consumer, and communications power systems demanding efficiency, small size, and robust protection.
FAQ
What is the maximum output current supported by the TPS54335-2ADRCT?
The TPS54335-2ADRCT supports up to 3 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). This rating assumes use of the VSON-10 package with exposed thermal pad connected to a multilayer ground plane via ≥6 thermal vias. Derating applies above 70°C ambient or with insufficient copper area.
Does the TPS54335-2ADRCT require an external bootstrap diode?
No, the TPS54335-2ADRCT integrates the bootstrap recharge diode, eliminating the need for an external component. A 0.1-µF X7R/X5R ceramic capacitor (10-V rating minimum) must be placed between BOOT and PH pins. This integration reduces BOM count and improves reliability compared to discrete bootstrap solutions.
How does the TPS54335-2ADRCT handle startup into a pre-biased output?
The TPS54335-2ADRCT implements monotonic startup into pre-biased outputs by disabling both high-side and low-side MOSFETs until the internal soft-start voltage exceeds the VSENSE pin voltage. This prevents reverse current flow through the low-side MOSFET and avoids output voltage collapse or overshoot during hot-plug scenarios.
What is the purpose of the RT pin on the TPS54335-2ADRCT?
The RT pin sets the switching frequency of the TPS54335-2ADRCT by connecting an external resistor to ground. Frequency ranges from 50 kHz to 1.5 MHz depending on resistor value (e.g., 100 kΩ yields ~480 kHz). This allows designers to balance EMI, inductor size, and light-load efficiency without changing the IC.
Can the TPS54335-2ADRCT operate with an input voltage below 4.5 V?
No, the TPS54335-2ADRCT has a specified minimum input voltage of 4.5 V per its absolute maximum and recommended operating conditions. Operation below this threshold may result in UVLO activation, unstable regulation, or failure to start. For sub-4.5-V inputs, consider TI's TPS54202 or similar low-input-voltage buck regulators.
TPS54335-2ADRCT 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:
- 2A
- 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)
TPS54335-2ADRCT FAQ
1.How can I place an order for TPS54335-2ADRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54335-2ADRCT 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 TPS54335-2ADRCT reliable?
The price and inventory of TPS54335-2ADRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54335-2ADRCT is usually 5 days.
3.What payment methods are accepted for TPS54335-2ADRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54335-2ADRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54335-2ADRCT?
TPS54335-2ADRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54335-2ADRCT 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 TPS54335-2ADRCT?
For technical support, including TPS54335-2ADRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54335-2ADRCT requirements.
6.How does Aetrix verify that TPS54335-2ADRCT is sourced from the original manufacturer or authorized distributors?
All TPS54335-2ADRCT 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 TPS54335-2ADRCT meets industry standards.
7.What is the process for return or replacement of TPS54335-2ADRCT?
All TPS54335-2ADRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54335-2ADRCT, 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 TPS54335-2ADRCT part is unused and in its original packaging.
Return procedure for TPS54335-2ADRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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