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Texas Instruments TPS55340PWPR
- Part No.:
- TPS55340PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS55340PWPR.pdf
- Description:
- IC REG BOOST ADJ 5.25A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,616
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Product details
Overview
TPS55340 from Texas Instruments is a monolithic nonsynchronous boost/SEPIC/flyback DC/DC regulator with integrated 5-A, 40-V low-side MOSFET switch, ±0.7% reference voltage accuracy, 2.9–32-V input range, and programmable 100 kHz–1.2 MHz switching frequency. It enables compact high-current power conversion in USB Type-C PD, Thunderbolt ports, and industrial 24-V systems.
For engineers reviewing the TPS55340 datasheet, TPS55340 pinout, TPS55340 application, or TPS55340 equivalent, key selection considerations include its wide VIN range, cycle-by-cycle current limiting, thermal shutdown at 165°C, soft-start programmability, and compatibility with boost/SEPIC/flyback topologies-critical for portable and ruggedized power designs.
Technical Context
The TPS55340 uses fixed-frequency current-mode PWM control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its transconductance error amplifier (240–440 µS) drives the COMP pin for loop stability via external RC compensation.
Switching frequency is set either by an external resistor on FREQ (40–480 kΩ) or synchronized to an external clock (200 kHz–1.0 MHz) on SYNC. Frequency foldback activates below 0.9 V on FB during overcurrent, reducing fSW to 25% of nominal to sustain regulation under overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 32 V - supports multicell Li-ion batteries and standard 3.3/5/12/24-V rails without pre-regulation |
| Output Current Capability | 5.25 A peak switch current - enables ≥800 mA at 24 V output in boost configuration with margin |
| Reference Voltage | 1.229 V ±0.7% - sets output accuracy for feedback-divider-based VOUT programming (e.g., 24 V ±170 mV) |
| Quiescent Current | 0.5 mA - minimizes standby loss in always-on industrial or docking applications |
| Shutdown Current | 2.7 µA - ensures ultra-low leakage during system sleep modes |
| Operating Junction Temp | –40°C to 150°C - validated for under-hood automotive auxiliary supplies and industrial enclosures |
| Switch RDS(on) | 60–110 mΩ @ 5 V VIN - limits conduction loss and thermal rise in high-duty-cycle boost stages |
Pinout & Package
TPS55340PWPR is supplied in the HTSSOP-14 package (5.00 mm × 4.40 mm) with PowerPAD™ thermal pad soldered to PGND. Pin numbering follows TI's PWP variant; NC pins must be connected to AGND per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.9–32 V; decoupled with CI near pin; separate from power-stage input in SEPIC/flyback |
| EN | Enable control | Logic-compatible input with 0.92–1.08 V rising threshold; internal 950-kΩ pulldown prevents floating |
| SW | Switch node | Drain of internal 5-A/40-V MOSFET; connects to inductor (boost/SEPIC) or transformer primary (flyback) |
| FREQ | Frequency programming | Resistor-to-AGND sets fSW (100 kHz–1.2 MHz); must not be left open |
| SS | Soft-start timing | Capacitor-to-AGND controls ramp time; 6-µA internal current source limits inrush and overshoot |
| COMP | Error amplifier output | Transconductance amplifier output; requires external RC network for loop stability and transient response |
| SYNC | External clock input | Accepts 200 kHz–1.0 MHz square wave; enables synchronization to system clock or noise-sensitive bands |
| FB | Feedback sense | Regulates to 1.229 V; connects to resistor divider midpoint for precise VOUT setting |
| PGND | Power ground | Source connection of internal MOSFET; must be low-inductance path to PowerPAD and input/output capacitors |
| AGND | Analog ground | Signal reference for FB, COMP, EN, SS; isolated from PGND except at single-point tie near PowerPAD |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping light-load mode | Reduces switching activity below minimum 77-ns on-time, improving efficiency at <10% load without compromising regulation |
| Cycle-by-cycle current limit | Hardware-based protection triggers at 5.25–7.75 A, preventing MOSFET failure during short-circuit or startup surge |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temp and restarts only after 15°C cooldown, avoiding thermal cycling instability |
| Undervoltage lockout (UVLO) | Disables operation below 2.5 V VIN with 140-mV hysteresis, blocking erratic behavior during brownout or battery depletion |
| Programmable soft-start | Capacitor-controlled ramp prevents input current spikes and output overshoot during power-up or hot-plug events |
Applications
| USB Type-C Power Delivery | Industrial 24-V Power Systems |
|---|---|
Use Scenario: Providing regulated 20-V output from 5-V or 9-V USB-C source to charge laptops or power peripherals. IC Role / Device Role / Timing Role: Nonsynchronous boost controller managing inductor current, feedback regulation, and fault protection in compact PD sink design. Use Value: Enables single-chip 5-A boost stage meeting USB PD 3.0 voltage negotiation and safety requirements without external gate driver. | Use Scenario: Generating stable 24-V rail from 12-V battery or 15-V intermediate bus in PLC I/O modules or motor drives. IC Role / Device Role / Timing Role: High-input-voltage boost regulator delivering up to 800 mA with thermal robustness across –40°C to 125°C ambient. Use Value: Eliminates need for cascaded converters; 32-V max VIN accommodates battery transients while 150°C TJ rating ensures reliability in sealed enclosures. |
| Thunderbolt™ Port Power | ADSL Modem Power Supply |
Use Scenario: Delivering 12-V or 15-V auxiliary power to Thunderbolt docks supporting dual 4K displays and storage. IC Role / Device Role / Timing Role: Synchronized flyback controller providing isolated bias supply with EMI-controlled 600-kHz switching. Use Value: SYNC pin allows alignment to Thunderbolt reference clock, reducing beat frequencies and easing EMC compliance. | Use Scenario: Generating +12-V and –12-V rails from 5-V input in DSL line card power management. IC Role / Device Role / Timing Role: SEPIC topology implementation enabling non-inverting buck-boost with continuous input current and ripple reduction. Use Value: Wide 2.9–32-V input range tolerates upstream DC-DC variations; pulse-skipping maintains >85% efficiency at standby current levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61175RGT | 3-A, 40-V switch; 18-V max VIN; HTSSOP-14 pinout identical but lower current and narrower input range | Limited to ≤600 mA at 24 V; unsuitable for >18-V input sources like 24-V industrial rails | Select when cost sensitivity outweighs current/headroom needs and VIN stays ≤18 V |
| LM5122MHX/NOPB | Synchronous boost controller (external FETs); 65-V max VIN; no integrated switch; requires gate drivers and layout for high-side/low-side FETs | Supports higher power (>10 A) and wider VIN (up to 65 V), but adds BOM count, layout complexity, and thermal design overhead | Select for >10-A output or >32-V input where discrete FET optimization justifies added design effort |
Compared with TPS61175RGT, TPS55340PWPR delivers 67% higher current and extends VIN range to 32 V for industrial robustness; versus LM5122MHX/NOPB, it trades external FET flexibility for integration simplicity and smaller footprint in ≤5-A applications.
Availability
TPS55340PWPR is available at Aetrix Electronics and suitable for USB Type-C PD implementations, Thunderbolt port power delivery, and industrial 24-V power systems requiring stable component supply across extended temperature and long production lifecycles.
Supply support for TPS55340PWPR 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-reliability power conversion solutions.
The TPS55340 belongs to TI's wide-input-voltage DC/DC regulator product line, engineered for flexible topology support (boost/SEPIC/flyback) in space-constrained, thermally demanding applications such as portable computing and industrial automation.
FAQ
What topologies does the TPS55340PWPR support?
The TPS55340PWPR supports boost, SEPIC, and isolated flyback configurations. Its nonsynchronous architecture and integrated 5-A/40-V low-side MOSFET enable all three without external switches. The datasheet provides verified schematics and design equations for each, including component selection guidelines for inductors, diodes, and feedback dividers specific to TPS55340PWPR.
Does the TPS55340PWPR require external compensation?
Yes, the TPS55340PWPR requires an external RC network connected to the COMP pin to stabilize the feedback loop. The transconductance error amplifier's output drives COMP, and proper compensation-typically a series RC from COMP to AGND-is essential for phase margin, transient response, and avoidance of oscillation. TI's WEBENCH Power Designer generates optimized values for TPS55340PWPR based on user-defined VOUT, IOUT, and fSW.
How does the TPS55340PWPR handle overcurrent conditions?
The TPS55340PWPR implements cycle-by-cycle current limiting with a typical threshold of 6.6 A. When inductor current reaches this level, the internal MOSFET turns off immediately within that switching cycle. If overload persists and FB drops below 0.9 V, frequency foldback reduces fSW to 25% of nominal to maintain regulation-documented in the TPS55340PWPR datasheet Section 7.3.3.
Can the TPS55340PWPR be synchronized to an external clock?
Yes, the TPS55340PWPR supports synchronization via its SYNC pin, accepting external clock signals from 200 kHz to 1.0 MHz with 10–90% duty cycle. When used, the FREQ pin must still have its timing resistor to ground, and the external clock must stay within ±20% of the resistor-set frequency. This capability is explicitly specified for TPS55340PWPR in the Electrical Characteristics table and Functional Description sections.
What is the thermal performance of the TPS55340PWPR in HTSSOP-14?
The TPS55340PWPR in HTSSOP-14 has a junction-to-ambient thermal resistance (RθJA) of 43.2°C/W and junction-to-board (RθJB) of 28.3°C/W, per the Thermal Information table. With proper PCB copper area, thermal vias under the PowerPAD, and minimal trace length to PGND, it sustains full 5-A operation at 125°C ambient-validated in the TPS55340PWPR datasheet Figure 6-4 (RDS(on) vs temperature) and thermal derating curves.
TPS55340PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 32V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 5.25A (Switch)
- Frequency - Switching:
- 94kHz ~ 1.14MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS55340PWPR FAQ
1.How can I place an order for TPS55340PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55340PWPR 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 TPS55340PWPR reliable?
The price and inventory of TPS55340PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55340PWPR is usually 5 days.
3.What payment methods are accepted for TPS55340PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55340PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55340PWPR?
TPS55340PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55340PWPR 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 TPS55340PWPR?
For technical support, including TPS55340PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55340PWPR requirements.
6.How does Aetrix verify that TPS55340PWPR is sourced from the original manufacturer or authorized distributors?
All TPS55340PWPR 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 TPS55340PWPR meets industry standards.
7.What is the process for return or replacement of TPS55340PWPR?
All TPS55340PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS55340PWPR, 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 TPS55340PWPR part is unused and in its original packaging.
Return procedure for TPS55340PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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