My Inquiry
My Account
Texas Instruments TPS54335ADDA
- Part No.:
- TPS54335ADDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54335ADDA.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,011
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54335ADDA 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 internal 2-ms soft-start, adjustable switching frequency from 50 kHz to 1.5 MHz via external RT resistor, ±0.8% accurate 0.8-V reference, and current-mode control for stable regulation in consumer power supplies and industrial bus converters.
For engineers reviewing the TPS54335ADDA datasheet, TPS54335ADDA pinout, TPS54335ADDA application, or TPS54335ADDA equivalent, key selection criteria include its SO PowerPAD™ 8-pin package, monotonic startup into pre-biased outputs, hiccup-mode overcurrent protection, thermal shutdown at 160°C, and pulse-skipping light-load efficiency optimization.
Technical Context
The TPS54335ADDA implements fixed-frequency peak current-mode control with slope compensation to prevent subharmonic oscillation at duty cycles above 50%. Its error amplifier (1300 µmhos transconductance) drives the COMP pin, which interfaces with external RC compensation networks for loop stability across varying load and line conditions.
Startup behavior is governed by an internal 2-ms soft-start ramp that controls the voltage reference, enabling monotonic rise into pre-biased outputs without reverse current. The BOOT-PH UVLO (2.1 V typical) ensures reliable high-side gate drive, while 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 power buses without external regulators |
| Output Current | 3 A continuous - enables single-chip conversion for mid-power applications like STB and LCD displays |
| Switching Frequency | 50 kHz to 1.5 MHz - adjustable via RT pin; higher frequencies reduce inductor size but increase switching loss |
| Voltage Reference | 0.8 V ±0.8% - enables precise output setting down to 0.8 V with minimal tolerance stack-up |
| Quiescent Current | 2 µA in shutdown - minimizes battery drain in always-on systems such as smart meters |
| Thermal Shutdown | 160°C threshold with 10°C hysteresis - protects against sustained overload or poor PCB thermal design |
| Current Limit | 4.9 A typical high-side limit - provides robust overload protection while allowing 3-A continuous operation with margin |
Pinout & Package
TPS54335ADDA is housed in an 8-pin SO PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal performance. The PowerPAD must be connected to GND via multiple vias for reliable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5–28 V supply; requires local 10-µF ceramic input capacitor for EMI suppression and transient response |
| PH | High-side MOSFET source | Connects to inductor; carries full switching current and requires low-inductance layout to minimize ringing |
| GND | Ground reference | Three dedicated pins (pins 4, 4, 4 in SO PowerPAD) tie to exposed thermal pad for low-impedance return path |
| BOOT | Bootstrap supply | Requires 0.1-µF X7R/X5R ceramic capacitor to PH for high-side gate drive; UVLO triggers if <2.1 V |
| EN | Enable control | Active-high logic input; internal 1.15-µA pullup allows floating enable; threshold is 1.21 V rising / 1.17 V falling |
| VSENSE | Feedback input | Inverting input of error amplifier; sets output voltage via resistor divider; max input voltage 3 V |
| COMP | Error amplifier output | Drives external RC compensation network; transconductance = 1300 µmhos; sensitive to noise coupling |
| RT | Frequency set | Connects to external resistor to adjust switching frequency; 100-kΩ yields ~480 kHz; 30-kΩ yields ~1.5 MHz |
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 |
| Pulse-skipping mode | Disables switching below 0.5-A peak inductor current to maintain >85% efficiency at light loads |
| Monotonic pre-bias startup | Prevents reverse current flow during startup into powered outputs - critical for hot-swap and multi-rail systems |
| Hiccup-mode OCP | Enters 512-cycle wait then 16384-cycle restart cycle on sustained overcurrent - avoids thermal runaway |
| Overvoltage transition protection | Clamps high-side switch off when VOUT >106% nominal and resumes only after falling to <104% - prevents overshoot damage |
Applications
| Digital TV Power Supply | Smart Meter DC-DC Conversion |
|---|---|
Use Scenario: Provides regulated 1.2-V core and 3.3-V I/O rails from 12-V or 24-V input in DTV mainboards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator managing dynamic load steps during video decoding and HDMI handshaking. Use Value: Monotonic startup prevents glitching on pre-biased DDR memory rails; pulse-skipping maintains standby efficiency <10 mW. | Use Scenario: Generates isolated 3.3-V microcontroller supply from non-isolated 12-V battery or PLC bus in utility meters. IC Role / Device Role / Timing Role: Main DC-DC converter delivering stable output despite wide input variation and intermittent load bursts. Use Value: 2-µA shutdown current extends battery life; hiccup-mode OCP prevents latch-up during surge events on metering lines. |
| Car Audio Amplifier Bias | Industrial 24-V Bus Converter |
Use Scenario: Supplies clean 5-V bias rail for Class-D audio amplifiers in automotive infotainment head units. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12-V vehicle supply to low-noise 5-V for analog signal chain. Use Value: Current-mode control rejects alternator ripple; thermal shutdown at 160°C withstands under-dash ambient temperatures. | Use Scenario: Converts 24-V factory bus to 5-V/3.3-V for PLC I/O modules and sensor interfaces in harsh environments. IC Role / Device Role / Timing Role: Robust point-of-load regulator handling wide temperature (-40°C to 125°C junction) and EMI-heavy industrial settings. Use Value: SO PowerPAD package enables direct thermal coupling to heatsink; 4.5–28-V range accommodates brownout and surge conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54335ADDAR | Tape-and-reel packaging variant; identical electrical specs and pinout | No functional difference; selected for automated SMT assembly | Choose TPS54335ADDAR for volume production; TPS54335ADDA for prototyping or small-batch builds |
| MP2335GJ-Z | Fixed 500-kHz frequency; 4.5–28-V input; 3-A output; no RT pin; different pinout (8-pin TSOT23) | Lacks frequency adjustability and monotonic pre-bias startup; smaller footprint but lower thermal capability | Select MP2335GJ-Z only where board space is constrained and fixed frequency suffices; verify thermal derating at 3 A |
Compared with TPS54335ADDA, TPS54335ADDAR offers identical performance in tape-and-reel form for production lines, while MP2335GJ-Z trades frequency flexibility and startup safety for compactness - making TPS54335ADDA optimal for thermally demanding, dynamically loaded applications requiring design margin.
Availability
TPS54335ADDA is available at Aetrix Electronics and suitable for digital TV power supplies, smart meter DC-DC conversion, and industrial 24-V bus converters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54335ADDA 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 ICs.
The TPS5433xA product line was designed specifically for high-efficiency, medium-current DC-DC conversion in space-constrained consumer, industrial, and automotive applications - emphasizing integration, thermal robustness, and ease of use.
FAQ
What is the maximum recommended output current for TPS54335ADDA under continuous operation?
The TPS54335ADDA supports 3-A continuous output current when properly thermally managed using the SO PowerPAD™ package's exposed thermal pad connected to a multi-via ground plane. Derating is required above 85°C ambient; full 3-A operation is validated at TJ ≤125°C per TI's thermal characterization data (RθJA = 42.1°C/W).
Does TPS54335ADDA support startup into a pre-biased output voltage?
Yes, TPS54335ADDA implements safe 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 voltage collapse during hot-insertion scenarios common in multi-rail systems.
How is switching frequency adjusted on TPS54335ADDA?
Switching frequency on TPS54335ADDA is set via an external resistor connected between the RT pin and GND. Frequency ranges from 50 kHz to 1.5 MHz depending on resistance value - e.g., 100 kΩ yields ~480 kHz, while 30 kΩ yields ~1.5 MHz. No external capacitor is required, unlike many competing controllers.
What is the purpose of the BOOT pin on TPS54335ADDA, and what capacitor is required?
The BOOT pin supplies gate drive voltage to the internal high-side MOSFET via a bootstrap capacitor tied to the PH pin. A 0.1-µF X7R or X5R ceramic capacitor rated ≥10 V is required; failure to meet this spec risks BOOT-PH UVLO triggering (2.1 V threshold), causing erratic switching or dropout under load.
Can TPS54335ADDA operate with an input voltage below 4.5 V?
No - TPS54335ADDA has a hard input UVLO threshold of 4.5 V (rising) with 180-mV hysteresis. Operation below 4.32 V disables the device. For sub-4.5-V inputs, consider TI's TPS54202 or alternative low-input buck regulators; TPS54335ADDA is not rated or characterized for such conditions.
TPS54335ADDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 8-SO PowerPad
TPS54335ADDA FAQ
1.How can I place an order for TPS54335ADDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54335ADDA 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 TPS54335ADDA reliable?
The price and inventory of TPS54335ADDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54335ADDA is usually 5 days.
3.What payment methods are accepted for TPS54335ADDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54335ADDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54335ADDA?
TPS54335ADDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54335ADDA 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 TPS54335ADDA?
For technical support, including TPS54335ADDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54335ADDA requirements.
6.How does Aetrix verify that TPS54335ADDA is sourced from the original manufacturer or authorized distributors?
All TPS54335ADDA 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 TPS54335ADDA meets industry standards.
7.What is the process for return or replacement of TPS54335ADDA?
All TPS54335ADDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54335ADDA, 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 TPS54335ADDA part is unused and in its original packaging.
Return procedure for TPS54335ADDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54335ADDA Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
