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Texas Instruments TPS54336DDAR
- Part No.:
- TPS54336DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54336DDAR.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
TPS54336DDAR 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 from a 4.5-V to 28-V input. 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 distributed bus regulation.
For engineers reviewing the TPS54336DDAR datasheet, TPS54336DDAR pinout, TPS54336DDAR application, or TPS54336DDAR equivalent, key selection considerations 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 layout practices for 5–24-V systems.
Technical Context
The TPS54336DDAR implements constant-frequency peak current-mode control with internal slope compensation to prevent subharmonic oscillation across duty cycles. Its error amplifier (1300 µmhos transconductance) compares VSENSE to the lower of the 0.8-V reference or SS pin voltage, enabling precise regulation and soft-start tracking.
Startup behavior is monotonic into pre-biased outputs: both MOSFETs remain off until SS voltage exceeds VSENSE. Overvoltage transition protection activates when VOUT exceeds 106% nominal, disabling the high-side switch until VOUT falls below 104%, preventing output overshoot during load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide-input industrial and telecom bus rails without external pre-regulation |
| Output Current | 3 A continuous - sufficient for powering FPGAs, DSPs, and multi-rail subsystems from single-stage conversion |
| Switching Frequency | Fixed 340 kHz - balances EMI performance, inductor size, and efficiency for mid-power applications |
| Voltage Reference | 0.8 V ±0.8% at TJ = 25°C - enables accurate 1.2-V, 1.8-V, 3.3-V, or 5-V outputs with standard resistor dividers |
| Quiescent Current | 2 µA in shutdown - minimizes standby power loss in battery-backed or always-on systems |
| Thermal Shutdown | 160°C with 10°C hysteresis - protects against sustained overload or poor PCB thermal design |
| Current Limit Threshold | 4.9 A typical high-side limit - provides robust short-circuit protection while allowing 3-A steady-state operation |
Pinout & Package
TPS54336DDAR uses the SO PowerPAD™ 8-pin package (4.89 mm × 3.90 mm) with exposed thermal pad on underside for enhanced heat dissipation. The PowerPAD must be soldered to a PCB ground plane using multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 4.5–28 V; connects to bulk input capacitor and feeds internal regulator and gate drivers |
| PH | Power stage switch node | Source of high-side MOSFET and drain of low-side MOSFET; connects to output inductor |
| GND | Power and signal ground | Reference for all internal circuits; tied to exposed thermal pad for thermal and electrical integrity |
| BOOT | High-side gate drive supply | Connects via 0.1-µF ceramic capacitor to PH to generate ~12-V gate voltage for high-side MOSFET |
| EN | Enable control input | Active-high logic input; floating enables device via internal 1.15-µA pullup; threshold 1.21 V rising |
| VSENSE | Feedback input | Inverting input of error amplifier; monitors output via resistor divider to set regulated voltage |
| COMP | Error amplifier output | Connects to RC compensation network; drives current comparator to regulate peak switch current |
| SS | Soft-start and tracking | Internal 2.3-µA current source charges external capacitor to ramp reference voltage linearly |
Key Features
| Feature | Design Value |
|---|---|
| Monotonic pre-biased startup | Prevents reverse current flow into powered outputs by inhibiting both MOSFETs until SS > VSENSE |
| Hiccup-mode overcurrent protection | Disables switching for 16384 cycles after sustained overcurrent, then auto-retries-reduces thermal stress vs latch-off |
| Integrated boot diode | Eliminates external bootstrap diode, reducing BOM count and improving reliability in high-duty-cycle designs |
| Overvoltage transition protection | Clamps high-side switch when VOUT > 106% nominal, limiting overshoot during fast load release or line steps |
| Pulse-skipping light-load mode | Stops switching when peak inductor current < 0.5 A, reducing quiescent current to 2 µA in shutdown and ~310 µA non-switching |
Applications
| Industrial Power Supply | Distributed Bus Regulation |
|---|---|
Use Scenario: Providing stable 3.3-V or 5-V rails for PLC I/O modules, motor controllers, and sensor interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: Primary buck regulator converting 24-V DC bus to point-of-load voltages with tight line/load regulation and thermal resilience. Use Value: 3-A capability supports multiple downstream LDOs or digital loads; 160°C thermal shutdown prevents field failures under convection-limited conditions. | Use Scenario: Regulating intermediate 12-V or 5-V distribution rails in networking equipment (switches, routers) fed from 48-V backplane. IC Role / Device Role / Timing Role: High-efficiency intermediate converter minimizing power loss across long PCB traces and connectors. Use Value: Fixed 340-kHz frequency simplifies EMI filter design; pulse-skipping maintains >85% efficiency down to 10-mA loads. |
| Consumer Audio Amplifier Supply | Smart Meter Power Management |
Use Scenario: Generating clean 12-V bias for Class D audio amplifier stages in home theater receivers and soundbars. IC Role / Device Role / Timing Role: Low-noise, high-PoL converter with monotonic startup avoiding pop noise during power-up. Use Value: 0.8-V reference accuracy ensures consistent output tolerance; SS pin allows synchronized ramp-up with system microcontroller. | Use Scenario: Powering metrology ICs, RF transceivers, and real-time clocks in ANSI C12.19-compliant smart meters operating from lithium-thionyl chloride batteries or AC adapters. IC Role / Device Role / Timing Role: Ultra-low-quiescent buck converter enabling >10-year battery life in sleep mode. Use Value: 2-µA shutdown current extends battery runtime; hiccup-mode OCP avoids catastrophic failure during meter tamper events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54335DDAR | Same SO PowerPAD package and MOSFET specs, but internal 2-ms soft-start and adjustable 50–1500-kHz frequency via RT pin | Preferred where frequency optimization or fixed soft-start timing is required; lacks SS pin flexibility | Select TPS54335DDAR if board space allows RT resistor and variable frequency improves EMI or efficiency targets |
| MP2336HG-DS | 3-A, 4.5–28-V buck with 500-kHz fixed frequency, 1.2-V reference, and smaller 8-pin SOIC (no PowerPAD) | Suitable for cost-sensitive, thermally less demanding applications; lower thermal performance due to no exposed pad | Choose MP2336HG-DS only if thermal margin >20°C exists and 0.8-V reference is not required for precision output setting |
Compared with TPS54336DDAR, TPS54335DDAR offers frequency tuning at the cost of SS pin programmability, while MP2336HG-DS trades thermal robustness and reference accuracy for lower cost and simpler layout-neither is pin-compatible, requiring PCB redesign.
Availability
TPS54336DDAR is available at Aetrix Electronics and suitable for industrial power supplies, distributed bus regulation, consumer audio amplifiers, and smart meter power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54336DDAR 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 decades of expertise in high-reliability DC-DC conversion.
The TPS5433x product line was designed specifically for compact, efficient, and robust point-of-load regulation in industrial, consumer, and telecom infrastructure-emphasizing thermal resilience, pre-biased startup, and integrated MOSFETs to reduce solution size.
FAQ
What is the recommended boot capacitor value for TPS54336DDAR?
The recommended boot capacitor for TPS54336DDAR is 0.1 µF, using an X7R or X5R ceramic dielectric rated for ≥10 V. This value ensures reliable high-side gate drive under full load and temperature range. Placement must be adjacent to the BOOT and PH pins with minimal trace length to minimize parasitic inductance and prevent gate-drive instability.
Does TPS54336DDAR support operation into a pre-biased output?
Yes, TPS54336DDAR 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 and output voltage collapse. This behavior is confirmed in the functional description and startup timing diagrams of the SLVSC03C datasheet.
What is the maximum achievable output voltage using TPS54336DDAR?
The maximum output voltage for TPS54336DDAR is 24 V, as specified in the Recommended Operating Conditions table. This limit arises from internal circuitry headroom and voltage ratings of integrated MOSFETs. Output voltages above 24 V require external components or a different topology, as the device's feedback reference is fixed at 0.8 V and cannot be scaled beyond its safe operating area.
How does the hiccup-mode overcurrent protection work in TPS54336DDAR?
TPS54336DDAR enters hiccup mode when overcurrent persists beyond 512 switching cycles. It then disables switching for 16384 cycles before attempting restart. This cycle repeats until fault clears. Unlike latch-off, hiccup mode limits average power dissipation and junction temperature rise during sustained shorts, enhancing reliability in unattended industrial deployments.
Can TPS54336DDAR be used with an input voltage below 4.5 V?
No, TPS54336DDAR is not rated for operation below 4.5 V input. Its absolute minimum input voltage is 4.5 V per Recommended Operating Conditions, and the internal UVLO threshold is 4.5 V (rising). Attempting operation below this risks improper gate drive, unstable regulation, or failure to start. For sub-4.5-V inputs, consider TI's TPS6286xx or similar low-input buck converters.
TPS54336DDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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:
- 340kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54336DDAR FAQ
1.How can I place an order for TPS54336DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54336DDAR 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 TPS54336DDAR reliable?
The price and inventory of TPS54336DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54336DDAR is usually 5 days.
3.What payment methods are accepted for TPS54336DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54336DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54336DDAR?
TPS54336DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54336DDAR 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 TPS54336DDAR?
For technical support, including TPS54336DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54336DDAR requirements.
6.How does Aetrix verify that TPS54336DDAR is sourced from the original manufacturer or authorized distributors?
All TPS54336DDAR 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 TPS54336DDAR meets industry standards.
7.What is the process for return or replacement of TPS54336DDAR?
All TPS54336DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54336DDAR, 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 TPS54336DDAR part is unused and in its original packaging.
Return procedure for TPS54336DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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