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Texas Instruments TPS54335DRCR
- Part No.:
- TPS54335DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54335DRCR.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
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Product details
Overview
TPS54335DRCR 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 50-kHz to 1.5-MHz switching frequency via RT pin, 0.8-V ±0.8% reference voltage, and current-mode control-used in industrial power supplies and distributed bus regulation.
For engineers reviewing the TPS54335DRCR datasheet, TPS54335DRCR pinout, TPS54335DRCR application, or TPS54335DRCR equivalent, key selection criteria include input voltage range (4.5–28 V), output current capability (3 A), thermal performance in VSON-10 package (RθJB = 18.9°C/W), and compatibility with pre-biased startup and pulse-skipping light-load efficiency.
Technical Context
The TPS54335DRCR implements fixed-frequency peak current-mode control with slope compensation to prevent subharmonic oscillation across duty cycles. Its error amplifier (1300 µmhos transconductance) drives the COMP pin for loop stability, while cycle-by-cycle high-side current limiting (4.0–6.5 A threshold) and low-side sourcing/sinking current limits protect against overload.
Startup behavior is monotonic into pre-biased outputs: both MOSFETs remain off until the internal soft-start voltage exceeds VSENSE. Overvoltage transition protection activates when VOUT > 106% of nominal, disabling the high-side switch until VOUT falls below 104%, preventing output overshoot during line transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide-input industrial and automotive bus rails without external pre-regulation |
| Output Current | 3 A continuous - enables single-chip 5-V/12-V/24-V point-of-load conversion for FPGA, DSP, or MCU core supplies |
| Switching Frequency | 50 kHz to 1.5 MHz adjustable via RT resistor - allows optimization of size (high-freq) vs. efficiency (low-freq) in filter design |
| Reference Voltage | 0.8 V ±0.8% at TJ = 25°C - ensures tight output regulation accuracy for low-voltage digital loads |
| Quiescent Current | 2 µA shutdown, 310 µA non-switching - extends battery life in always-on systems and reduces no-load losses |
| MOSFET RDS(on) | 128 mΩ (HS), 84 mΩ (LS) - minimizes conduction loss and enables high-efficiency operation at full load |
| Thermal Resistance | RθJB = 18.9°C/W (VSON-10) - supports high-power density PCB layouts with direct thermal coupling to board copper |
Pinout & Package
The TPS54335DRCR is housed in a 10-pin VSON package (3.0 mm × 3.0 mm) with exposed thermal pad (Pin 11) requiring solder connection to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2) | Power input | Dual VIN pins reduce trace resistance and improve current sharing for high-current input paths |
| PH (Pin 3) | High-side switch source | Connects to output inductor; carries full switching current and requires low-inductance layout |
| GND (Pins 4, 5) | Power ground | Dual GND pins minimize ground bounce and support stable current-sense reference |
| BOOT (Pin 9) | High-side gate drive supply | Requires 0.1-µF X7R/X5R ceramic capacitor to PH for bootstrap charging; UVLO at 2.1 V disables HS FET |
| EN (Pin 8) | Enable control | Logic-high >1.21 V enables operation; internal 1.15-µA pullup allows floating-enable default state |
| VSENSE (Pin 6) | Feedback input | Inverting input of error amplifier; connects to resistor divider for precise output voltage setting |
| COMP (Pin 7) | Error amplifier output | Connects to RC compensation network; sets loop bandwidth and phase margin |
| RT (Pin 10) | Frequency set | Connects to external resistor to adjust switching frequency from 50 kHz to 1.5 MHz |
| Exposed Thermal Pad (Pin 11) | Thermal path | Must be soldered to PCB ground plane using ≥4 thermal vias for RθJB = 18.9°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Monotonic pre-biased startup | Prevents reverse current flow into powered outputs by inhibiting both MOSFETs until soft-start voltage exceeds VSENSE |
| Pulse-skipping light-load mode | Disables switching when peak inductor current drops below 0.5 A, reducing quiescent current to 2 µA in shutdown |
| Hiccup-mode overcurrent protection | Enters latched-off state after 512 consecutive current-limit cycles, then auto-restarts after 16384 cycles for safe fault recovery |
| Integrated boot recharge diode | Eliminates external bootstrap diode, reducing BOM count and improving reliability in compact layouts |
| Overvoltage transition protection | Clamps high-side switch when VOUT exceeds 106% nominal, preventing overshoot during fast load release or line steps |
Applications
| Industrial Power Supply | Smart Meter Power Management |
|---|---|
Use Scenario: Regulating 24-V bus to 3.3-V/5-V rails for microcontroller, RF transceiver, and sensor interfaces in factory automation controllers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise DC power with hiccup-mode fault containment. Use Value: 3-A output capacity and 18.9°C/W thermal resistance enable fanless operation in sealed enclosures; pulse-skipping maintains <10-mW no-load dissipation. | Use Scenario: Powering metrology ASIC, LCD display, and PLC communication modules in utility smart meters with long battery backup requirements. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating from 12-V or 24-V mains-derived rail with monotonic startup into pre-biased backup capacitors. Use Value: 2-µA shutdown current extends 10-year battery life; ±0.8% reference accuracy ensures consistent ADC reference voltage across temperature. |
| Car Audio DSP Supply | 5-V Distributed Bus Converter |
Use Scenario: Generating clean 1.2-V core and 3.3-V I/O supplies for digital signal processors in automotive infotainment head units with wide input voltage swings. IC Role / Device Role / Timing Role: Automotive-grade buck converter handling cold-crank (4.5 V) and load-dump (28 V) conditions while maintaining regulation. Use Value: 4.5–28-V input range and thermal shutdown (160°C) ensure robustness in under-hood environments; current-mode control delivers fast transient response to DSP burst loads. | Use Scenario: Centralized 24-V-to-5-V conversion feeding multiple downstream point-of-load regulators on a server backplane or industrial controller motherboard. IC Role / Device Role / Timing Role: High-current intermediate bus converter with adjustable frequency to avoid noise coupling into sensitive analog or clock domains. Use Value: 50–1500-kHz frequency tuning allows EMI spread-spectrum alignment and inductor size reduction; dual VIN/GND pins lower impedance for 3-A output delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54336DRCR | Fixed 340-kHz frequency; adjustable soft-start via SS pin instead of internal 2-ms timer | Better EMI predictability in noise-sensitive systems; requires external soft-start capacitor | Select when deterministic switching frequency and programmable soft-start timing are prioritized over frequency flexibility |
| MP2335GDD | 4.5–28-V input, 3-A, 500-kHz fixed frequency; lower 1.2-V reference; no RT pin or hiccup-mode OCP | Lacks adjustable frequency and advanced protection; simpler compensation but less robust fault handling | Select for cost-sensitive, space-constrained designs where fixed-frequency operation and basic protection suffice |
Compared with TPS54335DRCR, TPS54336DRCR trades frequency adjustability for EMI stability and adds soft-start programmability, while MP2335GDD offers a lower-cost alternative with reduced feature set and no hiccup-mode recovery-making TPS54335DRCR optimal for designs requiring dynamic frequency tuning and comprehensive fault management.
Availability
TPS54335DRCR is available at Aetrix Electronics and suitable for industrial power supplies, smart metering systems, and automotive infotainment electronics requiring stable component supply and long-term production continuity.
Supply support for TPS54335DRCR 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 company headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and consumer markets.
The TPS5433x product line delivers highly integrated, thermally efficient synchronous buck converters targeting space-constrained, high-reliability power applications in industrial automation, energy infrastructure, and automotive electronics.
FAQ
What is the maximum recommended switching frequency for TPS54335DRCR?
The TPS54335DRCR supports a maximum switching frequency of 1.5 MHz, achievable with an RT resistor value of approximately 30 kΩ. At this frequency, minimum on-time is 94 ns (typical), enabling high-ratio step-downs such as 24 V to 1.2 V with practical inductor sizing. Operation above 1.5 MHz is not specified and may compromise stability or current-limit accuracy.
Does TPS54335DRCR support startup into a pre-biased output?
Yes, the TPS54335DRCR supports monotonic startup into pre-biased outputs. During startup, both high-side and low-side MOSFETs remain disabled until the internal soft-start voltage exceeds the voltage on the VSENSE pin, preventing reverse current flow and ensuring controlled voltage ramp-up without output discharge.
What is the purpose of the dual VIN and dual GND pins on TPS54335DRCR?
The dual VIN (Pins 1, 2) and dual GND (Pins 4, 5) pins on the TPS54335DRCR reduce parasitic resistance and inductance in high-current paths. This improves thermal distribution, lowers voltage drop under 3-A load, and enhances current-sense accuracy by stabilizing the ground reference for the internal current comparator.
How does the hiccup-mode overcurrent protection work in TPS54335DRCR?
The TPS54335DRCR enters hiccup-mode overcurrent protection after 512 consecutive switching cycles exceed the high-side current limit (4.0–6.5 A). It then disables switching for 16384 cycles (~100 ms at 150 kHz), after which it attempts automatic restart. This prevents thermal runaway while allowing self-recovery without manual reset.
Can TPS54335DRCR operate with an input voltage below 4.5 V?
No, the TPS54335DRCR has a specified minimum input voltage of 4.5 V per absolute maximum and recommended operating conditions. Input voltage below 4.5 V triggers undervoltage lockout (UVLO), disabling the device. The rising UVLO threshold is 4.5 V typical, with 180-mV hysteresis, so operation below 4.32 V is not functional or guaranteed.
TPS54335DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 25V
- 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)
TPS54335DRCR FAQ
1.How can I place an order for TPS54335DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54335DRCR 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 TPS54335DRCR reliable?
The price and inventory of TPS54335DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54335DRCR is usually 5 days.
3.What payment methods are accepted for TPS54335DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54335DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54335DRCR?
TPS54335DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54335DRCR 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 TPS54335DRCR?
For technical support, including TPS54335DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54335DRCR requirements.
6.How does Aetrix verify that TPS54335DRCR is sourced from the original manufacturer or authorized distributors?
All TPS54335DRCR 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 TPS54335DRCR meets industry standards.
7.What is the process for return or replacement of TPS54335DRCR?
All TPS54335DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54335DRCR, 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 TPS54335DRCR part is unused and in its original packaging.
Return procedure for TPS54335DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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