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Texas Instruments TPS54336ADDA
- Part No.:
- TPS54336ADDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54336ADDA.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:11,603
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Product details
Overview
TPS54336ADDA 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 fixed 340-kHz switching frequency, adjustable soft-start via SS pin, 0.8-V ±0.8% reference voltage, and monotonic startup into pre-biased outputs-used in industrial power supplies and consumer electronics requiring stable 5-V/12-V rails.
For engineers reviewing the TPS54336ADDA datasheet, TPS54336ADDA pinout, TPS54336ADDA application, or TPS54336ADDA equivalent, key selection criteria include its SO PowerPAD™ 8-pin package, BOOT-PH UVLO threshold (2.1 V), hiccup-mode overcurrent protection, thermal shutdown at 160°C, and compatibility with standard buck compensation networks using the COMP pin.
Technical Context
The TPS54336ADDA implements fixed-frequency peak current-mode control with internal oscillator set to 340 kHz (±20%), enabling predictable EMI behavior and simplified filter design. Its error amplifier (1300 µmhos transconductance) compares VSENSE against the lower of the internal 0.8-V reference or SS pin voltage, supporting tracking and soft-start functions.
Startup is monotonic into pre-biased outputs by inhibiting both MOSFETs until SS voltage exceeds VSENSE. The integrated boot regulator charges the BOOT–PH capacitor (0.1 µF recommended), and BOOT-PH UVLO (2.1 V typical) disables the high-side FET if bootstrap voltage collapses-ensuring gate-drive integrity without external diodes.
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 pre-regulation |
| Output Current | 3 A continuous - enables single-chip solutions for mid-power applications like STB or smart meters |
| Switching Frequency | 340 kHz (typical) - balances efficiency, size, and EMI for cost-sensitive 5-V/12-V distributed supplies |
| Voltage Reference | 0.8 V ±0.8% - ensures tight output regulation (e.g., ±10 mV at 1.2 V out) across temperature |
| Shutdown Quiescent Current | 2 µA - minimizes battery drain in always-on systems during standby |
| High-Side RDS(on) | 128 mΩ @ VBOOT-PH = 6 V - reduces conduction loss and thermal stress at full load |
| Soft-Start Control | SS pin with 2.3 µA charge current - allows programmable ramp time (e.g., 10 ms with 0.01 µF) |
Pinout & Package
TPS54336ADDA is housed in an 8-pin SO PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground for enhanced thermal performance (RθJB = 31.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5–28 V supply; connects to bulk input capacitor and feeds internal regulators |
| PH | Power switch node | Source of high-side MOSFET; connects to inductor and BOOT capacitor; carries high di/dt |
| GND | Ground reference | Three dedicated GND pins (pins 4, 4, 4) - low-impedance return path for power and signal grounds |
| BOOT | Bootstrap supply | Drives high-side gate via external 0.1-µF ceramic cap to PH; monitored for UVLO (2.1 V) |
| EN | Enable control | Active-high logic input (1.21 V threshold); internal pullup enables default operation when floating |
| VSENSE | Feedback input | Inverting input of error amp; sets output voltage via resistor divider (e.g., 10 kΩ + 10 kΩ for 1.6 V) |
| COMP | Compensation node | Error amp output; connects to Type II/III network for loop stability and transient response tuning |
| SS | Soft-start/tracking | Overrides internal reference during startup; external capacitor sets rise time (2.3 µA charge current) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 128-mΩ high-side + 84-mΩ low-side eliminates external diode and reduces BOM count by ≥2 components |
| Pulse-skipping light-load mode | Disables switching below 0.5-A peak inductor current - improves efficiency at <10% load without audible noise |
| Hiccup-mode overcurrent protection | Shuts down for 512 cycles on fault, then attempts restart - prevents thermal runaway during sustained overload |
| Monotonic pre-biased startup | Blocks both FETs until SS > VSENSE - avoids reverse current and output voltage collapse on hot-plug rails |
| Overvoltage transition protection | Disables high-side FET if VOUT > 106% nominal - clamps overshoot during line/load transients or soft-start exit |
Applications
| Consumer Set-Top Box Power | Battery Charger Auxiliary Rail |
|---|---|
Use Scenario: Powers 3.3-V and 1.2-V SoC cores and memory in digital TV and STB platforms with variable load profiles. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated intermediate rail from 12-V or 24-V bus. Use Value: Fixed 340-kHz frequency simplifies EMI filtering; 2-µA shutdown current extends standby battery life in remote-controlled devices. |
Use Scenario: Generates isolated 5-V auxiliary supply for charger controller ICs and status LEDs in multi-cell Li-ion chargers. IC Role / Device Role / Timing Role: Secondary buck converter stepping down main battery voltage (e.g., 16.8 V) to clean 5-V rail. Use Value: Monotonic startup prevents reverse current into pre-charged output capacitors; hiccup protection safeguards against short-circuit faults during connector mating. |
| Industrial Smart Meter Supply | Car Audio DSP Core Rail |
Use Scenario: Supplies 1.8-V core voltage to metrology SoC in ANSI C12.22-compliant smart meters operating from 5-V or 12-V backplane. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with robust thermal shutdown (160°C) for sealed enclosures. Use Value: 0.8-V ±0.8% reference enables accurate 1.8-V output (±14.4 mV tolerance); SO PowerPAD package delivers 31.8°C/W junction-to-board thermal resistance. |
Use Scenario: Delivers 1.1-V core supply to automotive-grade DSPs in premium car audio head units with 12-V battery input. IC Role / Device Role / Timing Role: Main processor rail converter supporting dynamic voltage scaling and fast load transient response. Use Value: Peak current-mode control provides <10-µs response to 1-A load steps; BOOT-PH UVLO ensures reliable gate drive under cold-crank conditions (VIN = 6 V). |
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 | Adjustable 50–1500 kHz frequency via RT pin; fixed 2-ms internal soft-start | Suitable where EMI tuning or higher switching frequency is required to shrink magnetics | Select TPS54335ADDAR when board space is constrained and frequency optimization is needed |
| MP2336HG-LL-Z | 3.3-V to 36-V input; 3-A output; 500-kHz fixed frequency; no SS pin; different pinout (QFN-10) | Preferred for wider VIN range and higher ambient temperature (TJ max = 150°C same) | Choose MP2336HG-LL-Z only if input exceeds 28 V or SO package is not required |
Compared with TPS54336ADDA, TPS54335ADDAR offers frequency flexibility but lacks SS pin adjustability, while MP2336HG-LL-Z extends input range but requires PCB redesign due to QFN-10 footprint and missing soft-start control-making TPS54336ADDA optimal for cost-sensitive, thermally managed 4.5–28-V designs needing precise startup control.
Availability
TPS54336ADDA is available at Aetrix Electronics and suitable for industrial smart meters, consumer STB platforms, and automotive audio subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54336ADDA 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 family was designed specifically for high-efficiency, low-component-count synchronous buck conversion in space-constrained industrial and consumer power supplies-emphasizing thermal robustness, startup reliability, and light-load efficiency.
FAQ
What is the maximum output current capability of the TPS54336ADDA?
The TPS54336ADDA delivers up to 3 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). This rating assumes use of the SO PowerPAD™ package with adequate copper area and vias to the internal ground plane, as specified in the thermal metrics (RθJB = 31.8°C/W). Derating is required above 85°C ambient.
How does the SS pin function in the TPS54336ADDA?
The SS pin in the TPS54336ADDA serves as the soft-start and tracking input. An external capacitor to ground sets the output voltage ramp time via a 2.3-µA internal current source. During startup, the device regulates to the lower of the internal 0.8-V reference or the SS pin voltage-enabling controlled rise times and voltage tracking in multi-rail systems. The TPS54336ADDA does not have an internal soft-start timer like the TPS54335A.
What is the purpose of the BOOT–PH UVLO threshold in the TPS54336ADDA?
The BOOT–PH UVLO threshold (2.1 V typical) in the TPS54336ADDA monitors the bootstrap capacitor voltage. If the voltage between BOOT and PH falls below this threshold, the high-side MOSFET is disabled and the low-side MOSFET is turned on to recharge the capacitor. This prevents shoot-through and ensures reliable gate drive for the high-side FET across all operating conditions-including low-duty-cycle and cold-crank scenarios.
Can the TPS54336ADDA operate with a pre-biased output voltage?
Yes, the TPS54336ADDA supports monotonic startup into pre-biased outputs. It achieves this by holding both the high-side and low-side MOSFETs off until the voltage on the SS pin exceeds the voltage on the VSENSE pin. This prevents reverse current flow through the low-side FET and avoids output voltage collapse-a critical feature for hot-swap and redundant power architectures.
What are the key differences between the TPS54336ADDA and TPS54335ADDAR?
The TPS54336ADDA uses a fixed 340-kHz switching frequency and adjustable soft-start via the SS pin, while the TPS54335ADDAR offers 50–1500 kHz frequency adjustment via the RT pin and a fixed 2-ms internal soft-start. Both share identical SO PowerPAD™ packaging, 3-A output, and 4.5–28-V input range-but the TPS54336ADDA is optimized for EMI predictability and startup control, whereas the TPS54335ADDAR prioritizes design flexibility in magnetics selection.
TPS54336ADDA 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:
- 340kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54336ADDA FAQ
1.How can I place an order for TPS54336ADDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54336ADDA 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 TPS54336ADDA reliable?
The price and inventory of TPS54336ADDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54336ADDA is usually 5 days.
3.What payment methods are accepted for TPS54336ADDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54336ADDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54336ADDA?
TPS54336ADDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54336ADDA 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 TPS54336ADDA?
For technical support, including TPS54336ADDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54336ADDA requirements.
6.How does Aetrix verify that TPS54336ADDA is sourced from the original manufacturer or authorized distributors?
All TPS54336ADDA 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 TPS54336ADDA meets industry standards.
7.What is the process for return or replacement of TPS54336ADDA?
All TPS54336ADDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54336ADDA, 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 TPS54336ADDA part is unused and in its original packaging.
Return procedure for TPS54336ADDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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