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Texas Instruments TPS55340RTER
- Part No.:
- TPS55340RTER
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS55340RTER.pdf
- Description:
- IC REG BOOST ADJ 5.25A 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,825
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Product details
Overview
TPS55340 from Texas Instruments is a monolithic nonsynchronous DC/DC regulator with integrated 5-A, 40-V low-side MOSFET, supporting boost, SEPIC, and flyback topologies. It operates from 2.9 V to 32 V input, delivers ±0.7% reference accuracy, features adjustable 100 kHz–1.2 MHz switching frequency, and enables high-efficiency power conversion in USB Type-C PD 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, programmable soft-start, cycle-by-cycle current limiting, thermal shutdown, and compatibility with QFN-16 and HTSSOP-14 packages with PowerPAD™ for thermal management.
Technical Context
The TPS55340 implements 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 (75–1480 kHz) or synchronized to an external clock (200 kHz–1.0 MHz) on SYNC. The device enters pulse-skipping mode below minimum 77 ns on-time and activates frequency foldback when FB drops below 0.9 V during overcurrent events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 32 V - supports multicell batteries and standard 3.3/5/12/24-V rails without pre-regulation |
| Output Current Capability | 5.25 A typical peak switch current - enables high-power boost conversion up to 24 V at 800 mA in reference designs |
| Reference Voltage Accuracy | ±0.7% - ensures tight output regulation across temperature (1.220–1.238 V at 25°C) |
| Quiescent Current | 0.5 mA - minimizes standby power loss in always-on industrial or portable applications |
| Shutdown Current | 2.7 µA - enables ultra-low-power system sleep modes |
| Switching Frequency Range | 100 kHz to 1.2 MHz - allows EMI optimization and inductor size reduction while maintaining stability |
| Operating Junction Temp | –40°C to 150°C - supports operation in harsh environments including industrial motor controls and automotive under-hood modules |
Pinout & Package
TPS55340 is available in two thermally enhanced packages: 3-mm × 3-mm WQFN-16 and 5-mm × 4.4-mm HTSSOP-14, both featuring PowerPAD™ for improved heat dissipation. Pin functions are identical across packages except for NC and SW count distribution.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.9–32 V; decoupling required near pin to suppress high di/dt noise |
| EN | Enable control input | Logic-compatible enable with 0.92–1.08 V threshold and 0.16 V hysteresis; internal 950-kΩ pulldown |
| SW | Power switch drain node | Connects to inductor/transformer primary; handles peak currents up to 7.75 A; requires low-inductance layout |
| FB | Feedback voltage sense | Regulates output via resistor divider to internal 1.229-V reference; bias current <20 nA minimizes divider error |
| COMP | Error amplifier output | Drives external RC compensation network; clamp voltages (0.75 V / 3.1 V) limit excursion during transients |
| SS | Soft-start timing | 6 µA internal current charges external capacitor; controls inrush current and output overshoot at startup |
| FREQ | Frequency programming | Resistor-to-ground sets switching frequency; must not be left floating; supports sync via SYNC pin |
| SYNC | External clock input | Accepts 200 kHz–1.0 MHz square wave; requires 10–90% duty cycle; enables system-level clock synchronization |
| PGND | Power ground return | Three dedicated pins (QFN) or three pins (HTSSOP); connects directly to MOSFET source and PCB PowerPAD™ |
| AGND | Analog ground reference | Separate from PGND; ties error amplifier, reference, and logic circuits; recommended star-point connection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-A, 40-V MOSFET | Eliminates external high-current switch; RDS(on) = 60–110 mΩ reduces conduction loss in boost/SEPIC stages |
| Pulse-skipping light-load mode | Maintains >85% efficiency at 10% load by disabling switching cycles-critical for battery-powered USB-C docks |
| Programmable soft-start | Capacitor-controlled ramp prevents inrush current surges and output overshoot during cold start or hot-plug events |
| Cycle-by-cycle current limit | Hardware-based protection triggers within one switching cycle-avoids inductor saturation and thermal runaway |
| Thermal shutdown with hysteresis | 165°C trip point with 15°C hysteresis enables safe automatic recovery after overload or poor heatsinking |
Applications
| USB Type-C Power Delivery | Industrial 24-V Power Conversion |
|---|---|
Use Scenario: Providing regulated 20 V output from 5–12 V input in compact docking stations with multiple downstream ports. IC Role / Device Role / Timing Role: Primary nonsynchronous boost controller managing dynamic load steps up to 3 A while maintaining <120 mV ripple. Use Value: Integrated 5-A switch and 1.2 MHz capability allow small 2.2-µH inductors and ceramic output capacitors, reducing board area by >35% vs discrete solutions. | Use Scenario: Generating isolated 24 V from 12 V bus in PLC I/O modules requiring reinforced insulation and transient immunity. IC Role / Device Role / Timing Role: Flyback controller with primary-side regulation; uses SYNC pin to align switching with system master clock for EMI reduction. Use Value: Wide –40°C to 150°C TJ rating and 32-V max input support direct connection to unregulated industrial rails without front-end buck pre-regulator. |
| Thunderbolt™ Port Power | ADSL Modem Power Supply |
Use Scenario: Delivering stable 15 V/1.5 A to Thunderbolt 3 controller ICs in ultrabook add-in cards with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency (600 kHz) boost converter operating in CCM; COMP pin compensated for <50 µs transient response to PCIe link training events. Use Value: Adjustable frequency avoids critical bands in 2.4 GHz/5 GHz Wi-Fi spectra; ±0.7% VREF ensures compliance with Thunderbolt power rail tolerance (±3%). | Use Scenario: Generating +12 V and –12 V bias rails from single 5 V input in DSL line card power supplies. IC Role / Device Role / Timing Role: Dual-output SEPIC controller using single TPS55340 with coupled inductor; leverages internal current sensing for cross-regulation. Use Value: Eliminates need for secondary-side optocoupler feedback; 2.7 µA shutdown current extends modem standby life in always-on residential deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61175RGET | 3-A, 40-V switch; max 18-V input; pin-to-pin compatible with TPS55340 HTSSOP-14 package | Limited to lower input voltage rails (≤18 V); unsuitable for 24-V industrial inputs or USB PD 3.0 28-V negotiation | Select TPS61175 only when input stays ≤18 V and 3-A peak current suffices-reduces BOM cost where full 5-A capability is unused |
| LM5122MTX/NOPB | Synchronous boost controller (external FETs); 65-V max input; no integrated switch; requires gate drivers and dual MOSFETs | Supports higher output power (>50 W) and wider input (4.5–65 V), but adds complexity and footprint | Choose LM5122 for >30-W designs needing >90% efficiency at full load or 65-V automotive input compatibility-accepts layout and component count trade-off |
Compared with TPS61175RGET, the TPS55340 extends input voltage range to 32 V and doubles peak current to 5.25 A, enabling single-stage conversion from 24-V rails. Versus LM5122MTX/NOPB, it trades external FET flexibility for integration, reducing design time and component count in ≤25-W applications.
Availability
TPS55340 is available at Aetrix Electronics and suitable for USB Type-C power delivery, industrial 24-V power conversion, and ADSL modem power supply applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS55340 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 power conversion ICs.
The TPS55340 belongs to TI's wide-input-voltage DC/DC regulator product line, designed specifically for space-constrained, high-efficiency boost, SEPIC, and flyback applications in portable, industrial, and communications equipment.
FAQ
What topologies does the TPS55340 support?
The TPS55340 supports boost, SEPIC, and isolated flyback topologies. Its nonsynchronous architecture and integrated 5-A, 40-V low-side MOSFET make it suitable for non-isolated boost and SEPIC, while transformer-coupled flyback configurations leverage the SW pin for primary-side switching. The datasheet provides detailed schematics and design equations for all three configurations, and WEBENCH Power Designer includes validated templates for each.
Does the TPS55340 require external compensation components?
Yes, the TPS55340 requires external RC compensation on the COMP pin to stabilize the feedback loop. The transconductance error amplifier output connects to COMP, and TI recommends a type-II or type-III network depending on topology and transient requirements. Typical designs use a series RC from COMP to AGND plus optional capacitor to FB, with values selected using TI's compensation calculator or verified WEBENCH designs for the specific TPS55340 configuration.
How does the TPS55340 handle overcurrent conditions?
The TPS55340 implements cycle-by-cycle overcurrent protection that disables the internal MOSFET when sensed current exceeds 5.25–7.75 A. If the overload persists and FB falls below 0.9 V, it activates frequency foldback-reducing switching frequency to 25% of nominal-to limit power dissipation. Recovery occurs automatically once FB rises above 0.9 V, provided the EN pin remains asserted and thermal limits are not exceeded.
Can the TPS55340 operate with input voltage below 2.9 V?
No-the TPS55340 is specified for continuous operation only above 2.9 V input. Below this, performance is not guaranteed. The undervoltage lockout (UVLO) turns off the device at ~2.5 V (with 120–160 mV hysteresis), and operation between 2.5 V and 2.9 V may occur but violates recommended conditions; electrical characteristics like reference accuracy, current limit, and efficiency are not assured in that range.
What is the purpose of the NC pins on the TPS55340 packages?
The NC (No Connect) pins on both the WQFN-16 and HTSSOP-14 packages of the TPS55340 are reserved and must be connected to AGND per TI's recommendation. They are not internally bonded and serve no functional role, but grounding them improves noise immunity and provides mechanical stability for the package. Leaving them floating may degrade EMI performance or cause unpredictable behavior in high-noise environments.
TPS55340RTER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- 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:
- 16-WQFN (3x3)
TPS55340RTER FAQ
1.How can I place an order for TPS55340RTER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55340RTER 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 TPS55340RTER reliable?
The price and inventory of TPS55340RTER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55340RTER is usually 5 days.
3.What payment methods are accepted for TPS55340RTER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55340RTER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55340RTER?
TPS55340RTER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55340RTER 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 TPS55340RTER?
For technical support, including TPS55340RTER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55340RTER requirements.
6.How does Aetrix verify that TPS55340RTER is sourced from the original manufacturer or authorized distributors?
All TPS55340RTER 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 TPS55340RTER meets industry standards.
7.What is the process for return or replacement of TPS55340RTER?
All TPS55340RTER units undergo pre-shipment inspection (PSI). If there is an issue with TPS55340RTER, 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 TPS55340RTER part is unused and in its original packaging.
Return procedure for TPS55340RTER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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