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Texas Instruments TPS54335ADRCR
- Part No.:
- TPS54335ADRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54335ADRCR.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:583
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Product details
Overview
TPS54335ADRCR 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 from a 4.5-V to 28-V input. It features internal 2-ms soft-start, adjustable switching frequency (50 kHz–1.5 MHz) via external RT resistor, 0.8-V ±0.8% reference voltage, and current-mode control for stable regulation in consumer power supplies and industrial bus converters.
For engineers reviewing the TPS54335ADRCR datasheet, TPS54335ADRCR pinout, TPS54335ADRCR application, or TPS54335ADRCR equivalent, key selection criteria include its VSON-10 package thermal performance (RθJB = 18.9°C/W), hiccup-mode overcurrent protection, monotonic startup into pre-biased outputs, and pulse-skipping light-load efficiency-critical for DTV, STB, and 24-V distributed power designs.
Technical Context
The TPS54335ADRCR 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 (3.5–6.1 A / 0 A) enforce robust overload handling.
Startup behavior is controlled by an internal 2-ms soft-start ramp that overrides the 0.8-V reference until settled; the device supports monotonic pre-biased output startup by inhibiting both MOSFETs until the 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%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports 5-V, 12-V, and 24-V distributed bus inputs without external regulators. |
| Output Current | 3 A continuous - enables single-chip 3.3-V/2.5-V/1.8-V rails for SoC, FPGA, or DSP core supplies. |
| Reference Voltage | 0.8 V ±0.8% - ensures ≤±6.4 mV absolute error at 25°C, critical for tight-tolerance point-of-load regulation. |
| Switching Frequency | 50 kHz to 1.5 MHz (adjustable via RT pin) - allows trade-off between inductor size (higher fSW) and conduction loss (lower fSW). |
| Quiescent Current | 2 µA shutdown, 310 µA non-switching - extends battery life in always-on standby circuits and reduces no-load losses. |
| Thermal Resistance | RθJB = 18.9°C/W (VSON-10) - enables >2 W dissipation on 2-layer PCBs with minimal copper area. |
| Protection Features | Hiccup-mode OCP, thermal shutdown (160–175°C), BOOT-PH UVLO (2.1 V), and overvoltage transition lockout - eliminates need for external fault management circuitry. |
Pinout & Package
TPS54335ADRCR is housed in a 10-pin VSON package (3.0 mm × 3.0 mm) with exposed thermal pad, optimized for high-power density and low thermal resistance (RθJB = 18.9°C/W). The package requires solder connection of the thermal pad to PCB ground plane via multiple vias for reliable thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | 4.5–28 V supply rail; must be decoupled with ≥10 µF ceramic capacitor near pin. |
| PH | High-side MOSFET source | Switch node connecting to external inductor; layout critical for EMI and efficiency. |
| GND | Ground reference (x3 pins) | Three dedicated GND pins reduce ground impedance and improve current return path integrity. |
| BOOT | Bootstrap supply | Connects to PH via 0.1-µF X7R/X5R ceramic capacitor; enables high-side gate drive above VIN. |
| EN | Enable control | Logic-level input (1.21 V rising threshold); floating enables operation; internal 1.15-µA pullup. |
| VSENSE | Feedback input | Inverting input of error amplifier; connects to resistor divider from VOUT for precise output regulation. |
| COMP | Error amplifier output | Connects to RC compensation network; sets loop bandwidth and phase margin. |
| RT | Frequency set | Connects to external resistor (e.g., 100 kΩ → ~430 kHz); determines oscillator timing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET integration | 128-mΩ high-side + 84-mΩ low-side FETs eliminate external diode, reducing BOM count and improving full-load efficiency by ≥3% vs diode-based buck. |
| Monotonic pre-biased startup | Prevents reverse current flow into powered outputs by disabling both FETs until soft-start voltage exceeds VSENSE - essential for hot-swap and multi-rail systems. |
| Pulse-skipping light-load mode | Disables switching when peak inductor current falls below 0.5 A, reducing quiescent current to 2 µA and boosting efficiency at <10% load. |
| Overvoltage transition protection | Clamps high-side FET during output overshoot (>106%) and holds off until recovery (<104%), preventing damage to downstream logic or memory. |
| Integrated boot recharge diode | Eliminates external bootstrap diode, simplifying layout and reducing component count while maintaining reliable high-side gate drive under all operating conditions. |
Applications
| Digital TV Power Supply | Industrial 24-V Bus Converter |
|---|---|
|
Use Scenario: Provides regulated 3.3-V and 1.2-V rails for SoC, DDR memory, and audio codecs in flat-panel TV mainboards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator controlling power sequencing and transient response for video processing subsystems. Use Value: Internal 2-ms soft-start prevents inrush-induced brownout during cold start; pulse-skipping maintains >85% efficiency at standby load (50 mA). |
Use Scenario: Steps down 24-V industrial bus to 5-V for PLC I/O modules and sensor interfaces in factory automation equipment. IC Role / Device Role / Timing Role: High-reliability DC-DC converter with hiccup-mode OCP and thermal shutdown for unattended operation in harsh environments. Use Value: RθJB = 18.9°C/W enables full 3-A output without heatsink on standard FR4; wide 4.5–28-V input accommodates bus sag and surge. |
| Smart Meter Auxiliary Supply | Car Audio DSP Core Supply |
|
Use Scenario: Generates isolated 3.3-V supply for microcontroller and RF transceiver in battery-backed smart electricity meters. IC Role / Device Role / Timing Role: Low-quiescent-current buck converter enabling >10-year battery life in meter sleep mode. Use Value: 2-µA shutdown current minimizes battery drain; EN pin allows MCU-controlled power gating for firmware updates. |
Use Scenario: Delivers clean, low-noise 1.2-V core voltage to automotive-grade DSPs in premium car audio head units. IC Role / Device Role / Timing Role: Precision-regulated point-of-load converter with ±0.8% reference accuracy and fast load-transient response. Use Value: 0.8-V reference tolerance ensures DSP core voltage stays within ±9.6 mV; current-mode control achieves <50-µs recovery from 1-A load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54335-1ADRCR | Same VSON-10 package but narrower thermal pad; identical electrical specs except reduced pad clearance for dense layouts. | Preferred for space-constrained PCBs where pin-to-pad clearance is critical; same thermal performance with proper via placement. | Select TPS54335-1ADRCR only when board stack-up requires tighter thermal pad isolation; otherwise use TPS54335ADRCR for broader design margin. |
| MP2335GDD-Z | 3-A, 4.5–28-V buck with 500-kHz fixed frequency; lacks RT adjustability and has ±1.5% reference (vs ±0.8%). | Better suited for cost-sensitive, fixed-frequency designs where soft-start time and reference accuracy are less critical. | Choose MP2335GDD-Z for simplified BOM and lower unit cost in non-precision applications; avoid where adjustable fSW or tight VREF tolerance is required. |
Compared with TPS54335ADRCR, TPS54335-1ADRCR offers identical regulation and protection but optimized thermal pad geometry, while MP2335GDD-Z trades frequency flexibility and reference accuracy for lower system cost and simpler layout-making each suitable for distinct design priorities.
Availability
TPS54335ADRCR is available at Aetrix Electronics and suitable for digital TV power supplies, industrial 24-V bus converters, and smart meter auxiliary supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54335ADRCR 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 engineered for high-efficiency, compact synchronous buck conversion in consumer, industrial, and automotive power systems-emphasizing integration, thermal performance, and robust protection.
FAQ
What is the maximum recommended switching frequency for TPS54335ADRCR?
The TPS54335ADRCR supports a maximum switching frequency of 1.5 MHz, achievable with an RT resistor value of 30 kΩ. At this frequency, minimum controllable on-time is 94 ns, enabling use with small inductors (e.g., 1.0 µH) in space-constrained designs. However, efficiency drops above 1 MHz due to increased switching losses, so 600–800 kHz is typical for balanced performance.
Does TPS54335ADRCR support monotonic startup into a pre-biased output?
Yes, the TPS54335ADRCR guarantees 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 and output discharge, making it suitable for hot-swap and multi-rail sequencing applications where downstream circuitry may already be powered.
What is the purpose of the RT pin on TPS54335ADRCR?
The RT pin on TPS54335ADRCR sets the switching frequency by connecting an external resistor to ground. For example, a 100-kΩ resistor yields ~430 kHz, while 30 kΩ gives ~1.5 MHz. This adjustability allows designers to optimize inductor size, capacitor ripple, and efficiency for specific load and thermal requirements without changing the IC.
How does the BOOT-PH UVLO function protect TPS54335ADRCR?
The BOOT-PH UVLO circuit monitors the voltage across the bootstrap capacitor. If it falls below 2.1 V (typical), the high-side MOSFET is immediately turned off and the low-side MOSFET is activated to recharge the capacitor. This prevents shoot-through and gate-drive failure, ensuring reliable operation even during heavy load transients or poor PCB layout.
Can TPS54335ADRCR operate with an input voltage below 4.5 V?
No, the TPS54335ADRCR has a specified minimum input voltage of 4.5 V per its absolute maximum and recommended operating conditions. Input voltages below this threshold trigger undervoltage lockout (UVLO), halting switching and placing the device in shutdown mode. Attempting operation below 4.5 V risks unstable regulation or failure to start.
TPS54335ADRCR 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)
TPS54335ADRCR FAQ
1.How can I place an order for TPS54335ADRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54335ADRCR 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 TPS54335ADRCR reliable?
The price and inventory of TPS54335ADRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54335ADRCR is usually 5 days.
3.What payment methods are accepted for TPS54335ADRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54335ADRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54335ADRCR?
TPS54335ADRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54335ADRCR 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 TPS54335ADRCR?
For technical support, including TPS54335ADRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54335ADRCR requirements.
6.How does Aetrix verify that TPS54335ADRCR is sourced from the original manufacturer or authorized distributors?
All TPS54335ADRCR 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 TPS54335ADRCR meets industry standards.
7.What is the process for return or replacement of TPS54335ADRCR?
All TPS54335ADRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54335ADRCR, 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 TPS54335ADRCR part is unused and in its original packaging.
Return procedure for TPS54335ADRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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