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Texas Instruments TPS54336ADRCT
- Part No.:
- TPS54336ADRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54336ADRCT.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
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Product details
Overview
TPS54336ADRCT from Texas Instruments is a synchronous step-down DC-DC converter with 4.5 V to 28 V input, 3 A continuous output, fixed 340 kHz switching frequency, adjustable soft-start via SS pin, and integrated 128 mΩ high-side / 84 mΩ low-side MOSFETs-designed for stable 5 V/12 V distributed power bus regulation in industrial embedded systems.
For engineers reviewing the TPS54336ADRCT datasheet, TPS54336ADRCT pinout, TPS54336ADRCT application, or TPS54336ADRCT equivalent, key selection considerations include its fixed-frequency current-mode control, monotonic pre-biased startup capability, hiccup-mode overcurrent protection, and thermal shutdown behavior at 160 °C junction temperature.
Technical Context
The TPS54336ADRCT implements fixed-frequency peak current-mode control with internal oscillator set to 340 kHz (±20%), enabling predictable EMI profile and simplified output filter design. Its error amplifier compares VSENSE to the lower of 0.8 V reference or SS pin voltage, supporting tracking and soft-start functionality.
It features cycle-by-cycle high-side current limiting (4.9 A typ), low-side sourcing/sinking current limits (4.7 A / 0 A), BOOT-PH UVLO (2.1 V), and overvoltage transition protection that disables the high-side MOSFET when VOUT exceeds 106% 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 wide-range industrial and automotive supply rails without external pre-regulation |
| Output Current | 3 A continuous - delivers full rated load with integrated MOSFETs and PowerPAD thermal enhancement |
| Switching Frequency | 340 kHz (typ) - fixed frequency enables consistent EMI filtering and reduces solution size vs variable-frequency alternatives |
| Voltage Reference | 0.8 V ±0.8% - tight tolerance enables accurate output regulation down to 0.8 V with minimal divider error |
| Shutdown Quiescent Current | 2 µA - ultra-low off-state draw extends battery life in standby or always-on systems |
| Soft-Start Control | SS pin with 2.3 µA charge current - enables user-defined ramp time and output voltage tracking during power-up |
| Thermal Shutdown | 160 °C with 10 °C hysteresis - protects against sustained overload while allowing recovery after cooling |
Pinout & Package
TPS54336ADRCT is packaged in a 10-pin VSON (DRC) with 3.00 mm × 3.00 mm body and exposed thermal pad-optimized for high-power density and PCB thermal management via bottom-side copper connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5–28 V supply; connects to input bulk capacitor and must be decoupled near package |
| PH | Power switch node | Source of high-side MOSFET and drain of low-side MOSFET; connects directly to inductor and boot capacitor |
| GND (pins 3,4,5) | Ground reference | Three dedicated ground pins reduce impedance; all must connect to PCB ground plane with multiple vias |
| BOOT | Bootstrap supply | Requires 0.1 µF X7R/X5R ceramic capacitor to PH; supplies gate drive for high-side MOSFET |
| EN | Enable control | Active-high logic input; 1.21 V rising threshold; internal pullup allows floating-to-enable operation |
| COMP | Error amplifier output | Connects to compensation network (R/C) between COMP and GND for loop stability |
| VSENSE | Feedback input | Inverting input of transconductance error amp; sets output voltage via resistor divider from VOUT |
| SS | Soft-start/tracking | Overrides internal reference during startup; external capacitor sets 10–90% ramp time (tSS = 0.8·VREF/ISS) |
Key Features
| Feature | Design Value |
|---|---|
| Monotonic pre-biased startup | Prevents reverse current into powered outputs by blocking both MOSFETs until SS > VSENSE |
| Pulse skipping at light load | Disables switching when peak inductor current falls below 0.5 A, improving efficiency below ~10% load |
| Hiccup-mode overcurrent protection | Enters 16384-cycle restart delay after sustained overcurrent, reducing thermal stress vs latch-off |
| Integrated boot recharge diode | Eliminates external diode requirement, reducing BOM count and layout complexity |
| Overvoltage transition protection | Clamps high-side MOSFET during output overshoot events (e.g., load dump), limiting VOUT to ≤106% nominal |
Applications
| Industrial Distributed Power Bus | Battery Charger Front-End |
|---|---|
Use Scenario: Regulating 24 V input to stable 5 V/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 regulated rail with fast transient response and monotonic startup into pre-biased backplane. Use Value: Integrated 128 mΩ/84 mΩ MOSFETs enable 3 A output without external switches; fixed 340 kHz simplifies EMI filter design for CE-compliant systems. | Use Scenario: Converting 12 V vehicle battery or adapter output to 5 V for USB-C PD charging circuits in portable test equipment. IC Role / Device Role / Timing Role: Input-stage DC-DC converter providing clean, isolated 5 V supply with hiccup-mode fault handling during short-circuit events. Use Value: 2 µA shutdown current minimizes parasitic drain on battery; SS pin enables synchronized ramp with downstream charger ICs. |
| Smart Meter Power Supply | Car Audio DSP Core Rail |
Use Scenario: Generating 3.3 V core voltage from 12 V meter supply for metrology SoCs and RF communication modules under wide temperature range. IC Role / Device Role / Timing Role: High-efficiency buck converter operating across –40 °C to +125 °C ambient with thermal shutdown at 160 °C junction. Use Value: 0.8 V ±0.8% reference ensures accurate output regulation despite temperature drift; VSON package supports compact meter PCB layout. | Use Scenario: Providing 1.2 V/1.8 V DSP core supply from 12 V car battery in infotainment head units with strict EMI requirements. IC Role / Device Role / Timing Role: Fixed-frequency current-mode buck regulator minimizing conducted noise in audio-sensitive environments. Use Value: 340 kHz switching avoids AM radio band; pulse skipping maintains >85% efficiency at standby loads (<100 mA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54335ADRCT | Adjustable 50–1500 kHz frequency via RT pin; internal 2-ms soft-start; no SS pin | Suitable where frequency optimization or EMI tuning is required; lacks tracking capability | Select when board-level EMI filtering must be tuned or when fixed 340 kHz causes interference |
| MP2336HGQ-Z | 3.8–32 V input; 3 A; 500 kHz fixed; different pinout; no SS pin; 1.2 V reference | Requires redesign of feedback divider and compensation; no soft-start customization | Choose for cost-sensitive designs where 1.2 V reference and higher VIN max are acceptable trade-offs |
Compared with TPS54335ADRCT, the TPS54336ADRCT offers precise soft-start control but sacrifices frequency flexibility; versus MP2336HGQ-Z, it provides tighter reference accuracy and SS-based tracking at the cost of vendor-specific support and toolchain integration.
Availability
TPS54336ADRCT is available at Aetrix Electronics and suitable for industrial distributed power buses, smart meter power supplies, and car audio DSP core rails requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS54336ADRCT 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 50 years of innovation in high-reliability power conversion.
The TPS5433xA product line delivers highly integrated synchronous buck converters targeting space-constrained industrial, automotive, and consumer power systems requiring robust performance across wide input ranges and temperature extremes.
FAQ
What is the switching frequency of the TPS54336ADRCT?
The TPS54336ADRCT operates at a fixed internal switching frequency of 340 kHz, with typical variation from 272 kHz to 408 kHz across temperature and process. This frequency is not adjustable-it eliminates the need for an external RT resistor and simplifies EMI filter design compared to the adjustable-frequency TPS54335A variant. The TPS54336ADRCT does not support frequency programming via pin or register.
How does soft-start work on the TPS54336ADRCT?
The TPS54336ADRCT uses the SS pin to control soft-start: an internal 2.3 µA current source charges an external capacitor connected from SS to GND, generating a linear voltage ramp. The device regulates VOUT to follow this ramp until it reaches the 0.8 V reference. Soft-start time (10–90%) is calculated as tSS = 0.8 × 0.8 V ÷ 2.3 µA ≈ 278 ms per µF. This enables controlled inrush current and output tracking in multi-rail systems.
Does the TPS54336ADRCT support pre-biased output startup?
Yes, the TPS54336ADRCT supports monotonic startup into pre-biased outputs. During startup, both high-side and low-side MOSFETs remain disabled until the SS pin voltage exceeds the VSENSE pin voltage-preventing reverse current flow from the pre-charged output into the converter. This behavior is confirmed in the datasheet's Feature Description section 7.3.8 and applies specifically to the TPS54336A family, including TPS54336ADRCT.
What is the maximum output voltage achievable with the TPS54336ADRCT?
The TPS54336ADRCT supports output voltages from 0.8 V up to 24 V, as specified in the Recommended Operating Conditions table. The upper limit is constrained by the absolute maximum ratings of the internal MOSFETs and the VSENSE pin's 3 V input limit. For 24 V output, the feedback divider must scale VOUT down to ≤3 V at VSENSE-e.g., using R1 = 290 kΩ and R2 = 10 kΩ yields VOUT = 0.8 × (1 + 290k/10k) = 24 V.
Can the TPS54336ADRCT replace the TPS54335ADRCT on the same PCB?
No, the TPS54336ADRCT cannot directly replace the TPS54335ADRCT without PCB modification. Although both share the DRC (10-pin VSON) package, their pin functions differ: TPS54335ADRCT uses pin 8 for RT (frequency setting), while TPS54336ADRCT uses pin 8 for SS (soft-start). Swapping them would leave the RT pin unconnected and the SS pin shorted or floating, causing incorrect operation or failure to start.
TPS54336ADRCT 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:
- 340kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54336ADRCT FAQ
1.How can I place an order for TPS54336ADRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54336ADRCT 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 TPS54336ADRCT reliable?
The price and inventory of TPS54336ADRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54336ADRCT is usually 5 days.
3.What payment methods are accepted for TPS54336ADRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54336ADRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54336ADRCT?
TPS54336ADRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54336ADRCT 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 TPS54336ADRCT?
For technical support, including TPS54336ADRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54336ADRCT requirements.
6.How does Aetrix verify that TPS54336ADRCT is sourced from the original manufacturer or authorized distributors?
All TPS54336ADRCT 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 TPS54336ADRCT meets industry standards.
7.What is the process for return or replacement of TPS54336ADRCT?
All TPS54336ADRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54336ADRCT, 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 TPS54336ADRCT part is unused and in its original packaging.
Return procedure for TPS54336ADRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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