My Inquiry
My Account
Texas Instruments TPS54332DDA
- Part No.:
- TPS54332DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54332DDA.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,310
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54332DDA 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, pulse-skipping Eco-mode for light-load efficiency, and adjustable output down to 0.8 V. It serves as primary voltage regulator in distributed power systems requiring stable 5-V/12-V/24-V rails.
For engineers reviewing the TPS54332DDA datasheet, TPS54332DDA pinout, TPS54332DDA application, or TPS54332DDA equivalent, key selection criteria include input voltage range (3.5–28 V), shutdown quiescent 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 TPS54332DDA implements constant-frequency peak-current mode control with internal slope compensation, enabling stable operation with ceramic output capacitors and simplified external compensation. Its error amplifier features 92 μA/V transconductance and 2.7-MHz unity-gain bandwidth, supporting robust loop response across load and line transients.
It integrates boot recharge diode functionality and monitors BOOT-PH voltage (threshold ~2.1 V) to prevent high-side MOSFET misfiring. Frequency foldback reduces switching frequency during overcurrent events-down to 125 kHz when VSENSE falls below 0.2 V-while overvoltage transient protection clamps high-side switch off if VSENSE exceeds 109% × 0.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 28 V - supports wide-input industrial and automotive supply rails without pre-regulation. |
| Output Current | 3.5 A continuous - enables single-chip regulation for mid-power digital loads like SoCs and FPGAs. |
| Switching Frequency | Fixed 1 MHz (±20%) - allows compact magnetics and EMI filtering while avoiding AM band interference. |
| Shutdown Quiescent Current | 1 μA typical - extends battery life in always-on or standby applications such as CPE equipment. |
| Eco-mode Threshold | 160 mA peak inductor current - automatically enters pulse-skipping mode below this level to maintain >85% efficiency at light loads. |
| Voltage Reference | 0.8 V ±2% initial accuracy - sets precise output regulation point; drift ≤ ±3.5% over –40°C to +150°C. |
| Thermal Shutdown | 165°C junction temperature - provides fail-safe protection during overload or poor heatsinking conditions. |
Pinout & Package
TPS54332DDA uses an 8-pin SOIC PowerPAD™ package (4.9 mm × 6 mm) with exposed thermal pad (Pin 9) that must be soldered to PCB ground plane for optimal thermal performance (RθJC(bot) = 2.3°C/W).
| 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 for high-side MOSFET; UVLO disables switch if voltage drops below ~2.1 V. |
| VIN (Pin 2) | Main input supply | Accepts 3.5–28 V; powers internal circuitry and high-side driver; includes undervoltage lockout at 3.5 V. |
| EN (Pin 3) | Enable control input | Pull below 1.25 V to disable; floating or pulled above 1.35 V enables operation; internal pullup supports default-on behavior. |
| SS (Pin 4) | Slow-start timing node | 2-μA internal current source charges external capacitor; sets soft-start time (1–10 ms recommended) to limit inrush current. |
| VSENSE (Pin 5) | Error amplifier inverting input | Monitors feedback voltage; compared to 0.8-V reference; triggers overvoltage protection at 109% × Vref. |
| COMP (Pin 6) | Error amplifier output | Drives PWM comparator; connects external RC network for loop compensation; clamped at 0.5 V in Eco-mode. |
| GND (Pin 7) | Analog ground reference | Reference for VSENSE, COMP, SS, EN; must be low-impedance connection to minimize noise coupling. |
| PH (Pin 8) | Power switch node | Source of internal high-side MOSFET; connects to inductor; requires low-inductance layout to reduce switching losses. |
| PowerPAD (Pin 9) | Thermal & electrical ground | Exposed pad under package; must be soldered to large copper area tied to GND for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 80-mΩ high-side MOSFET | Enables 3.5-A continuous output without external switch; reduces BOM count and layout complexity. |
| Pulse-skipping Eco-mode | Boosts light-load efficiency by disabling switching cycles when peak inductor current falls below 160 mA. |
| Internal slope compensation | Prevents subharmonic oscillation at duty cycles >50%, allowing stable operation with ceramic output capacitors. |
| Overvoltage transient protection (OVTP) | Clamps high-side switch off when VSENSE exceeds 109% × 0.8 V, limiting output overshoot during load dump or fault recovery. |
| Programmable UVLO via EN pin | Two-resistor divider sets custom input undervoltage lockout with hysteresis, improving system reliability in brownout conditions. |
Applications
| Set-Top Box Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Regulates 12-V input to 3.3-V/2.5-V rails for video decoder SoC, memory, and HDMI interface logic. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, low-noise intermediate voltage with fast transient response. Use Value: Eco-mode maintains >88% efficiency at 100-mA standby load; 1-MHz switching enables <3.3-μH inductor size. | Use Scenario: Powers isolated analog input channels and microcontroller in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Main DC/DC converter delivering 5-V rail from 24-V field bus with robust overvoltage and thermal protection. Use Value: OVTP prevents sensor damage during 24-V bus transients; thermal shutdown ensures safe operation in enclosed enclosures. |
| Battery Charger Auxiliary Rail | Car Audio DSP Power |
Use Scenario: Generates 5-V auxiliary supply for USB charging port controller and status LED drivers in multi-chemistry battery charger. IC Role / Device Role / Timing Role: Secondary regulator fed from main 12-V battery input; operates across cold-crank (6-V) to load-dump (30-V) conditions. Use Value: 3.5-V minimum VIN enables operation during engine cranking; 1-μA shutdown current preserves battery charge during storage. | Use Scenario: Supplies 1.2-V core voltage to digital signal processor and 3.3-V I/O voltage to audio codec in automotive infotainment head unit. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with tight output tolerance required for DSP clock stability. Use Value: 0.8-V reference with ±2% accuracy ensures <±30-mV output deviation; RθJA = 48.7°C/W supports convection-cooled design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54331DDA | Lower 3-A output current rating; same 1-MHz frequency and SOIC PowerPAD package; 3.5-V min VIN. | Suitable for lower-power designs where 3.5-A capability is unnecessary; identical footprint and control interface. | Select when output current requirement is ≤3 A and cost optimization is prioritized. |
| TPS54531DDA | Higher 5-A output current; same 1-MHz frequency and SOIC PowerPAD package; adds integrated bootstrap diode. | Required for systems needing >3.5-A sustained load, e.g., multi-core processors or high-brightness LED drivers. | Choose when future-proofing for higher current or upgrading existing TPS54332DDA designs. |
Compared with TPS54332DDA, TPS54331DDA offers reduced current capacity but identical control architecture and pinout, while TPS54531DDA delivers higher output current with no layout change-making both viable alternatives depending on power scaling needs.
Availability
TPS54332DDA is available at Aetrix Electronics and suitable for consumer electronics, industrial automation, automotive infotainment, and battery-powered equipment requiring stable component supply and long-term manufacturability.
Supply support for TPS54332DDA 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 specializing in analog and embedded processing technologies, with leadership in power management ICs and broad industrial application coverage.
The TPS543xx family targets high-efficiency, wide-input DC/DC conversion for space-constrained applications-designed to simplify power design through integration, Eco-mode efficiency, and robust protection features.
FAQ
What is the minimum input voltage required for normal operation of the TPS54332DDA?
The TPS54332DDA requires a minimum input voltage of 3.5 V for normal operation, as defined by its internal undervoltage lockout threshold. Below this voltage, the device ceases switching even if the EN pin is asserted. The datasheet specifies this as a guaranteed operating condition, not a typical value, and applies across the full temperature range (–40°C to +150°C). Operation at voltages below 3.5 V may result in unpredictable behavior or failure to start.
How does the Eco-mode function in the TPS54332DDA improve light-load efficiency?
The TPS54332DDA enters Eco-mode when peak inductor current falls below 160 mA, causing the COMP pin voltage to clamp at 0.5 V and skip switching cycles. This reduces switching losses and maintains >85% efficiency at loads as low as 100 mA. Unlike burst-mode converters, Eco-mode preserves fixed-frequency operation during active cycles, minimizing output voltage ripple and EMI concerns. The transition threshold is specified as typical and varies slightly with temperature and input voltage.
Can the TPS54332DDA be used with ceramic output capacitors?
Yes, the TPS54332DDA supports ceramic output capacitors due to its current-mode control architecture with internal slope compensation. The datasheet explicitly recommends ceramic types (X7R/X5R) for output filtering and provides design guidelines for stability-including derating capacitance for DC bias effects. Typical designs use 22-μF ceramic arrays, and the error amplifier's 2.7-MHz unity-gain bandwidth enables stable loop response with low-ESR ceramics without additional compensation components.
What is the purpose of the PowerPAD in the TPS54332DDA package?
The PowerPAD in the TPS54332DDA is an exposed thermal pad (Pin 9) that must be soldered to a PCB ground plane to achieve specified thermal performance. It provides a low-thermal-resistance path (RθJC(bot) = 2.3°C/W) from die to board, enabling reliable 3.5-A operation at ambient temperatures up to +85°C. Failure to connect the PowerPAD results in excessive junction temperature rise-potentially triggering thermal shutdown-and violates TI's recommended layout practices per the datasheet.
Does the TPS54332DDA include overvoltage transient protection, and how does it work?
Yes, the TPS54332DDA includes overvoltage transient protection (OVTP) that monitors the VSENSE pin. When VSENSE exceeds 109% of the 0.8-V reference (i.e., ~0.872 V), the high-side MOSFET is forced off to limit output overshoot during startup or load-dump events. Recovery occurs when VSENSE falls below 107% of Vref (~0.856 V). This hardware-based protection operates independently of the control loop and responds within nanoseconds, preventing damage to downstream logic or sensors connected to the regulated rail.
TPS54332DDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- 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):
- 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
TPS54332DDA FAQ
1.How can I place an order for TPS54332DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54332DDA 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 TPS54332DDA reliable?
The price and inventory of TPS54332DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54332DDA is usually 5 days.
3.What payment methods are accepted for TPS54332DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54332DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54332DDA?
TPS54332DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54332DDA 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 TPS54332DDA?
For technical support, including TPS54332DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54332DDA requirements.
6.How does Aetrix verify that TPS54332DDA is sourced from the original manufacturer or authorized distributors?
All TPS54332DDA 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 TPS54332DDA meets industry standards.
7.What is the process for return or replacement of TPS54332DDA?
All TPS54332DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54332DDA, 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 TPS54332DDA part is unused and in its original packaging.
Return procedure for TPS54332DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54332DDA 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…
