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Texas Instruments TPS54335-1ADRCR
- Part No.:
- TPS54335-1ADRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54335-1ADRCR.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,627
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Product details
Overview
TPS54335-1ADRCR from Texas Instruments is a synchronous step-down DC-DC converter IC 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 (50–1500 kHz) via external RT resistor, internal 2-ms soft-start, and 0.8-V ±0.8% reference voltage - used in industrial power supplies, LCD displays, and distributed 5/12/24-V bus regulation.
For engineers reviewing the TPS54335-1ADRCR datasheet, TPS54335-1ADRCR pinout, TPS54335-1ADRCR application, or TPS54335-1ADRCR equivalent, key selection criteria include its VSON-10 package thermal performance (RθJB = 18.9°C/W), hiccup-mode overcurrent protection, monotonic pre-biased startup capability, and compatibility with WEBENCH Power Designer for custom design validation.
Technical Context
The TPS54335-1ADRCR implements fixed-frequency peak current-mode control with slope compensation to prevent subharmonic oscillation at duty cycles >50%. Its error amplifier (1300 µmhos transconductance) 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 enforce robust overload handling.
Startup behavior is controlled by an internal 2-ms soft-start ramp applied to the voltage reference, ensuring monotonic output rise into pre-biased loads. The BOOT-PH UVLO (2.1 V typical) safeguards high-side gate drive integrity, and overvoltage transition protection disables the high-side switch when VOUT exceeds 106% of nominal until recovery to ≤104%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide-input industrial and automotive battery-derived rails without external pre-regulation. |
| Output Current | 3 A continuous - enables single-chip conversion for mid-power subsystems like display bias or FPGA core rails. |
| Switching Frequency | 50 kHz to 1500 kHz (adjustable via RT pin) - allows trade-off between inductor size (high-freq) and conduction loss (low-freq). |
| 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 divider error impact. |
| Quiescent Current | 2 µA shutdown, 310 µA non-switching - extends battery life in always-on or standby systems. |
| Thermal Resistance | RθJB = 18.9°C/W (VSON-10) - ensures reliable operation under 3-A load with standard 2-layer PCB copper pour and thermal vias. |
| Protection Features | Hiccup-mode OCP, thermal shutdown (160–175°C), BOOT-PH UVLO, and overvoltage transition protection - eliminates need for external fault-handling circuitry. |
Pinout & Package
TPS54335-1ADRCR uses the DRC package: 10-pin VSON with exposed thermal pad (3.00 mm × 3.00 mm body). The thermal pad must be soldered to PCB ground plane using ≥4 thermal vias for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | 4.5–28 V supply rail connection; requires local 10-µF ceramic input capacitor near pin. |
| PH | High-side MOSFET source | Switch node connecting to external inductor; critical for EMI layout and boot capacitor placement. |
| GND (pins 3,4,5) | Ground return | Three dedicated GND pins minimize ground bounce; all must connect directly to thermal pad and system ground plane. |
| BOOT | Bootstrap supply | Connects to 0.1-µF X7R/X5R ceramic capacitor between BOOT and PH for high-side gate drive. |
| EN | Enable control | Logic-level enable (1.21 V rising threshold); floating enables device; internal 1.15-µA pullup supports default-on operation. |
| VSENSE | Feedback input | Inverting input of transconductance error amplifier; connects to resistor divider from VOUT for output voltage setting. |
| COMP | Error amplifier output | Loop compensation node; external RC network between COMP and GND sets phase margin and bandwidth. |
| RT | Frequency set | Connects to external resistor to GND to program switching frequency from 50 kHz to 1500 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 128-mΩ high-side + 84-mΩ low-side enable >90% efficiency at 3 A without external FETs or diodes. |
| Monotonic Pre-Biased Startup | Prevents reverse current flow into powered outputs during power-up - essential for hot-swap and multi-rail sequencing. |
| Pulse Skipping at Light Load | Disables switching below ~0.5-A peak inductor current, reducing quiescent consumption to 2 µA in shutdown mode. |
| Overvoltage Transition Protection | Clamps high-side switch off if VOUT exceeds 106% nominal, preventing overshoot damage to downstream ICs. |
| WEBENCH Integration | Fully supported in TI's WEBENCH Power Designer for automated BOM generation, thermal simulation, and loop stability analysis. |
Applications
| Industrial Power Supply | LCD Display Bias Rail |
|---|---|
Use Scenario: Regulating 24-V bus to 5-V/3.3-V for PLC I/O modules and sensor interfaces in factory automation. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, stable, and protected intermediate voltage rails. Use Value: Integrated MOSFETs and hiccup OCP eliminate discrete protection components; RθJB = 18.9°C/W sustains full 3-A load on compact industrial PCBs. |
Use Scenario: Generating 12-V backlight supply and 3.3-V logic rail from 24-V panel input in commercial LCD signage. IC Role / Device Role / Timing Role: Dual-output capable (with external feedback resistors) synchronous buck controller for display subsystem power. Use Value: 0.8-V reference accuracy ±0.8% ensures tight tolerance on low-voltage logic rails; pulse skipping maintains efficiency during display idle periods. |
| Smart Meter Auxiliary Power | Distributed 5-V Bus Converter |
Use Scenario: Deriving regulated 3.3-V supply from 12-V battery or transformer input in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Isolated auxiliary power converter meeting long-term reliability and low-quiescent requirements. Use Value: 2-µA shutdown current extends battery backup runtime; monotonic startup prevents meter reset during brownout recovery. |
Use Scenario: Point-of-load conversion from 12-V or 24-V backplane to 5-V for USB peripherals, Ethernet PHYs, and MCU subsystems. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck stage supporting multiple downstream loads. Use Value: Adjustable 50–1500-kHz frequency allows optimization for small inductors in space-constrained enclosures; thermal pad enables direct heatsink attachment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54335ADRCR | Same VSON-10 package and pinout; differs only in soft-start implementation (internal 2-ms vs TPS54335-1A's identical timing but narrower thermal pad). | No functional difference in most designs; TPS54335ADRCR has slightly wider thermal pad per TI's DRC package note. | Select TPS54335ADRCR if legacy board layout uses original DRC pad dimensions; otherwise TPS54335-1ADRCR is drop-in compatible. |
| TPS543320RHLR | 4-A, 4.5–18-V input, 1.5-MHz fixed-frequency; uses different pinout (16-pin QFN), no RT pin, higher IQ (15 µA). | Higher current rating and tighter input range; lacks adjustable frequency and requires new PCB layout. | Choose only when 4-A output or stricter input voltage constraints apply; not pin-compatible - redesign required. |
Compared with TPS54335ADRCR, the TPS54335-1ADRCR offers identical electrical performance and pin compatibility but with optimized thermal pad clearance; versus TPS543320RHLR, it trades higher current and fixed frequency for design flexibility and lower quiescent current in space-constrained 3-A applications.
Availability
TPS54335-1ADRCR is available at Aetrix Electronics and suitable for industrial power supplies, LCD display bias rails, smart meter auxiliary power, and distributed 5-V bus converters requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for TPS54335-1ADRCR 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 TPS5433xA family was designed specifically for cost-sensitive, space-constrained industrial and consumer DC-DC applications demanding high integration, robust protection, and simplified design - exemplified by the TPS54335-1ADRCR's VSON-10 footprint and WEBENCH-ready architecture.
FAQ
What is the switching frequency range of the TPS54335-1ADRCR?
The TPS54335-1ADRCR supports an adjustable switching frequency from 50 kHz to 1500 kHz, set by an external resistor connected between the RT pin and ground. This range allows designers to optimize for inductor size, efficiency, and EMI performance - for example, 300 kHz balances low conduction loss with manageable magnetics, while 1.2 MHz minimizes solution footprint in portable equipment.
Does the TPS54335-1ADRCR support monotonic startup into a pre-biased output?
Yes, the TPS54335-1ADRCR is explicitly designed for safe monotonic startup into pre-biased outputs. During startup, both high-side and low-side MOSFETs remain off until the internal soft-start voltage exceeds the VSENSE pin voltage, preventing reverse current flow and output discharge - a critical feature for hot-swap and multi-rail power systems where downstream circuits may already be powered.
What is the purpose of the BOOT pin on the TPS54335-1ADRCR?
The BOOT pin on the TPS54335-1ADRCR supplies gate drive voltage to the integrated high-side MOSFET via a bootstrap capacitor connected between BOOT and PH. A 0.1-µF X7R/X5R ceramic capacitor is required; if the BOOT-PH voltage drops below 2.1 V (typical), the high-side switch turns off to allow recharge - ensuring reliable high-side operation across the full duty cycle range.
How does overvoltage transition protection work in the TPS54335-1ADRCR?
The TPS54335-1ADRCR monitors output voltage via the VSENSE pin and activates overvoltage transition protection when VOUT exceeds 106% of the nominal regulated value. Upon detection, the high-side MOSFET is immediately disabled and held off until VOUT falls to ≤104%, preventing damaging overshoot during load transients or startup - a hardware-level safeguard independent of loop response time.
Can the TPS54335-1ADRCR be used with WEBENCH Power Designer?
Yes, the TPS54335-1ADRCR is fully supported in Texas Instruments' WEBENCH Power Designer tool. Users can enter input/output specifications, select TPS54335-1ADRCR, and generate complete schematics, BOMs, thermal simulations, and loop compensation networks - accelerating design validation and reducing iteration cycles for custom power supply implementations.
TPS54335-1ADRCR 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54335-1ADRCR FAQ
1.How can I place an order for TPS54335-1ADRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54335-1ADRCR 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 TPS54335-1ADRCR reliable?
The price and inventory of TPS54335-1ADRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54335-1ADRCR is usually 5 days.
3.What payment methods are accepted for TPS54335-1ADRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54335-1ADRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54335-1ADRCR?
TPS54335-1ADRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54335-1ADRCR 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 TPS54335-1ADRCR?
For technical support, including TPS54335-1ADRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54335-1ADRCR requirements.
6.How does Aetrix verify that TPS54335-1ADRCR is sourced from the original manufacturer or authorized distributors?
All TPS54335-1ADRCR 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 TPS54335-1ADRCR meets industry standards.
7.What is the process for return or replacement of TPS54335-1ADRCR?
All TPS54335-1ADRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54335-1ADRCR, 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 TPS54335-1ADRCR part is unused and in its original packaging.
Return procedure for TPS54335-1ADRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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