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Texas Instruments TPS54332DDAR
- Part No.:
- TPS54332DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54332DDAR.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:7,208
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Product details
Overview
TPS54332DDAR from Texas Instruments is a 28-V, 3.5-A non-synchronous step-down DC/DC converter with integrated 80-mΩ high-side MOSFET, fixed 1-MHz switching frequency, Eco-mode pulse-skipping for light-load efficiency, and adjustable output down to 0.8 V. It serves as primary voltage regulator in industrial power supplies and consumer electronics requiring stable 5-V or 12-V rails from wide-input sources.
For engineers reviewing the TPS54332DDAR datasheet, TPS54332DDAR pinout, TPS54332DDAR application, or TPS54332DDAR equivalent, key selection criteria include input voltage range (3.5–28 V), shutdown current (1 μA), Eco-mode activation threshold (160 mA), thermal shutdown (165°C), and SOIC PowerPAD™ package thermal resistance (RθJA = 48.7°C/W).
Technical Context
The TPS54332DDAR implements constant-frequency peak-current mode control with internal slope compensation, enabling stable operation with ceramic output capacitors and simplified loop compensation. Its error amplifier features 92 μA/V transconductance and 2.7-MHz unity-gain bandwidth, supporting fast transient response in distributed power systems.
It integrates boot recharge diode functionality and monitors BOOT-PH voltage (threshold ~2.1 V) to prevent high-side MOSFET misfiring. During overcurrent, it applies frequency foldback-reducing switching frequency to 125 kHz at VSENSE < 0.2 V-to limit inductor current and improve fault tolerance without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 28 V - supports direct connection to 5-V, 12-V, and 24-V bus rails without pre-regulation. |
| Output Current | 3.5 A continuous - enables single-chip regulation for mid-power digital loads like FPGAs or SoCs. |
| Switching Frequency | 1 MHz (±20%) - allows compact magnetics and reduces output ripple without compromising EMI filter size. |
| Shutdown Quiescent Current | 1 μA typical - extends battery life in always-on or standby applications such as smart sensors. |
| Reference Voltage | 0.8 V ±2% initial accuracy - sets minimum output voltage and defines resistor-divider scaling for precise VOUT programming. |
| Eco-mode Threshold | 160 mA typical peak inductor current - triggers pulse-skipping below this level to maintain >85% efficiency at 10-mA loads. |
| Thermal Shutdown | 165°C junction temperature - latches off switching until die cools, protecting against sustained overload or poor heatsinking. |
| Current Limit Threshold | 4.2 A minimum - provides robust short-circuit protection while allowing 3.5-A continuous operation with margin. |
Pinout & Package
TPS54332DDAR uses an 8-pin SOIC PowerPAD™ package (DDA) with exposed thermal pad (Pin 9, GND) requiring PCB solder connection for thermal and electrical integrity. Package dimensions are 4.9 mm × 6 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (Pin 1) | Bootstrap supply node | Connects 0.1-μF X7R/X5R ceramic capacitor to PH; supplies gate drive voltage for high-side MOSFET; monitored for UVLO (~2.1 V). |
| VIN (Pin 2) | Main input supply | Accepts 3.5–28 V; powers internal bias circuits and high-side driver; includes internal undervoltage lockout (3.5 V threshold). |
| EN (Pin 3) | Enable control input | Pull below 1.25 V to disable; floating or pulled high enables operation; internal 1-μA pullup supports UVLO resistor network. |
| SS (Pin 4) | Slow-start timing node | Charged by 2-μA internal current source; external capacitor sets 1–10 ms soft-start ramp to limit inrush into output capacitance. |
| VSENSE (Pin 5) | Error amplifier inverting input | Compares feedback voltage to 0.8-V reference; also used by OVTP circuit (trips at 109% × VREF) and frequency foldback logic. |
| COMP (Pin 6) | Error amplifier output | Drives PWM comparator; connects to RC compensation network; clamped at 0.5 V in Eco-mode to halt switching. |
| GND (Pin 7) | Analog ground reference | Return path for error amplifier and internal circuits; must be routed separately from power ground before joining at PowerPAD. |
| PH (Pin 8) | Power switch node | Source of internal high-side MOSFET; connects to inductor and bootstrap capacitor; carries full switching current and dV/dt stress. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping Eco-mode | Activates automatically below 160 mA load to reduce switching losses and maintain >85% efficiency at microamp loads. |
| Integrated high-side MOSFET | 80-mΩ RDS(on) at 6 V BOOT-PH enables 3.5-A output with minimal external components and no external driver needed. |
| Overvoltage transient protection (OVTP) | Clamps high-side switch off when VSENSE exceeds 109% × 0.8 V (0.872 V), limiting output overshoot during unload or fault recovery. |
| Frequency foldback under fault | Scales switching frequency from 1 MHz down to 125 kHz as VSENSE drops below 0.6 V, preventing inductor saturation during short circuits. |
| Programmable UVLO | Uses EN pin with two external resistors to set custom start/stop thresholds (e.g., 10 V start / 8 V stop) with hysteresis for noisy inputs. |
| Thermally enhanced PowerPAD™ | Exposed pad (Pin 9) must be soldered to PCB copper pour; achieves 48.7°C/W junction-to-ambient and enables 3.5-A operation without heatsink. |
Applications
| Industrial Power Supply | Consumer LCD Display |
|---|---|
|
Use Scenario: Distributed 5-V rail generation from 12-V or 24-V factory automation bus with variable load profiles. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V to PLC I/O modules and sensor interfaces. Use Value: Eco-mode maintains >90% efficiency at 50-mA standby load while 1-MHz operation minimizes filter size in space-constrained DIN-rail enclosures. |
Use Scenario: Backlight and logic rail supply in 19–24-inch LCD monitors powered from universal AC adapters. IC Role / Device Role / Timing Role: Secondary DC/DC stage stepping down 12-V adapter output to 3.3-V and 5-V system rails. Use Value: 1-μA shutdown current enables instant-on capability; programmable slow-start prevents display flicker during cold start. |
| Battery-Powered CPE | Automotive Infotainment |
|
Use Scenario: Power management in cable modem or VoIP phone with backup Li-ion battery during AC outage. IC Role / Device Role / Timing Role: Main system regulator converting 7.4-V battery to 3.3-V MCU and PHY supply. Use Value: 3.5-V minimum input supports operation down to 2-cell battery depletion; thermal shutdown protects against enclosure overheating. |
Use Scenario: 5-V USB hub and audio codec supply in head-unit designs using 12-V vehicle battery with load-dump transients. IC Role / Device Role / Timing Role: Post-regulator isolating sensitive analog/digital circuits from noisy 12-V rail. Use Value: Overvoltage transient protection suppresses >10-V spikes from alternator load dump; 28-V absolute max rating ensures survival. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54331DDAR | Lower 3-A output current rating; same 1-MHz frequency and SOIC PowerPAD package; 3.5-V min input. | Not suitable for 3.5-A continuous loads; acceptable for 2.5-A applications with tighter thermal margins. | Select when cost sensitivity outweighs 0.5-A headroom need and board layout is identical. |
| TPS54531DDAR | 5-A output rating; same 1-MHz frequency and DDA package; higher 115-mΩ high-side RDS(on) at 3.5 V. | Supports higher peak loads but exhibits ~3% lower full-load efficiency due to increased conduction loss. | Choose when future-proofing for 4–5-A loads is required and thermal design accommodates higher dissipation. |
Compared with TPS54332DDAR, TPS54331DDAR offers reduced current capacity at lower cost and identical footprint, while TPS54531DDAR trades marginal efficiency loss for 1.5-A additional output headroom-both require revalidation of loop stability and thermal performance.
Availability
TPS54332DDAR is available at Aetrix Electronics and suitable for industrial power supplies, consumer LCD displays, battery-powered CPE equipment, and automotive infotainment systems requiring stable component supply across multi-year production cycles.
Supply support for TPS54332DDAR 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 ICs, with decades of expertise in high-efficiency DC/DC conversion and automotive-grade reliability.
The TPS543xx family was designed for cost-sensitive, wide-input industrial and consumer power supplies where integration, thermal performance, and light-load efficiency are critical-TPS54332DDAR specifically targets 3.5-A applications needing 1-MHz switching and Eco-mode operation.
FAQ
What is the minimum input voltage required for TPS54332DDAR to operate?
The TPS54332DDAR requires a minimum input voltage of 3.5 V to function normally, as defined by its internal undervoltage lockout threshold. Operation below this level halts switching, though the device may remain partially biased if EN is asserted. The datasheet specifies 3.5 V as both the recommended minimum and absolute operating limit under all conditions.
Does TPS54332DDAR support adjustable output voltage, and how is it set?
Yes, TPS54332DDAR supports adjustable output voltage down to 0.8 V using an external resistor divider connected to the VSENSE pin. The output voltage is calculated as VOUT = 0.8 V × (1 + R5/R6), where R5 connects from VOUT to VSENSE and R6 connects from VSENSE to GND. This configuration allows precise setting of common rails like 3.3 V or 5 V.
How does Eco-mode work in TPS54332DDAR, and what triggers it?
TPS54332DDAR enters Eco-mode automatically when peak inductor current falls below 160 mA, reducing switching activity to minimize light-load losses. In this mode, the COMP pin is clamped at 0.5 V, halting high-side MOSFET switching until load increases. This preserves >85% efficiency at loads as low as 10 mA without requiring external control signals.
What thermal considerations apply to TPS54332DDAR in continuous 3.5-A operation?
For continuous 3.5-A operation, TPS54332DDAR requires proper thermal design: the exposed PowerPAD™ (Pin 9) must be soldered to ≥4 cm² of 2-oz copper on the PCB, with thermal vias to inner layers. With this, junction temperature stays within 150°C limit at 25°C ambient and 12-V input. RθJA is 48.7°C/W; derate output current above 85°C ambient per datasheet curves.
Can TPS54332DDAR be used in automotive applications, and what protections does it offer?
TPS54332DDAR is suitable for automotive infotainment and body electronics due to its 28-V absolute maximum input rating, overvoltage transient protection (OVTP), and thermal shutdown at 165°C. While not AEC-Q100 qualified, its robustness against load-dump transients (up to 30 V) and wide temperature range (–40°C to 150°C) supports under-hood-adjacent use with appropriate system-level filtering.
TPS54332DDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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):
- 3.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 26.04V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54332DDAR FAQ
1.How can I place an order for TPS54332DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54332DDAR 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 TPS54332DDAR reliable?
The price and inventory of TPS54332DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54332DDAR is usually 5 days.
3.What payment methods are accepted for TPS54332DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54332DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54332DDAR?
TPS54332DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54332DDAR 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 TPS54332DDAR?
For technical support, including TPS54332DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54332DDAR requirements.
6.How does Aetrix verify that TPS54332DDAR is sourced from the original manufacturer or authorized distributors?
All TPS54332DDAR 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 TPS54332DDAR meets industry standards.
7.What is the process for return or replacement of TPS54332DDAR?
All TPS54332DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54332DDAR, 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 TPS54332DDAR part is unused and in its original packaging.
Return procedure for TPS54332DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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