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Texas Instruments TPS55340RTET
- Part No.:
- TPS55340RTET
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS55340RTET.pdf
- Description:
- IC REG BOOST ADJ 5.25A 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,819
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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, 2.9–32-V input range, and adjustable 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, programmable soft-start, pulse-skipping efficiency at light loads, and dual-package availability (QFN-16 and HTSSOP-14) with PowerPAD thermal enhancement.
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 compensation, while the FREQ pin accepts an external resistor or synchronized clock signal (200 kHz–1.0 MHz) to set switching frequency.
It supports three topologies via external component configuration: nonisolated boost (VIN < VOUT), SEPIC (VIN < or > VOUT), and isolated flyback (transformer-coupled). Protection includes cycle-by-cycle overcurrent limit (5.25–7.75 A), thermal shutdown (165°C), UVLO (2.5 V threshold with 140 mV hysteresis), and soft-start via external capacitor on SS pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 32 V - supports multicell batteries and standard rails (3.3 V, 5 V, 12 V, 24 V) |
| Switch Rating | 5-A, 40-V N-channel MOSFET - enables up to 800 mA output at 24 V in boost mode with margin |
| Reference Voltage | 1.229 V ±0.7% - sets precise output regulation via FB resistor divider |
| Quiescent Current | 0.5 mA - minimizes standby power loss in always-on systems |
| Shutdown Current | 2.7 µA - ensures ultra-low leakage during system sleep states |
| Switching Frequency | 100 kHz to 1.2 MHz - adjustable via FREQ pin resistor or external SYNC clock |
| Operating Junction Temp | –40°C to 150°C - validated for harsh industrial and automotive under-hood environments |
Pinout & Package
TPS55340 is available in two thermally enhanced packages: 3-mm × 3-mm WQFN-16 (RTE) and 5-mm × 4.4-mm HTSSOP-14 (PWP), both featuring PowerPAD for improved heat dissipation. Pin functions are identical across packages except for NC and SW pin count differences.
| 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 1.08 V rising threshold and 0.16 V hysteresis; internal 950-kΩ pulldown |
| SW | Power switch drain | Connects to inductor/transformer switch node; handles peak currents up to 7.75 A |
| FREQ | Frequency programming | Resistor-to-AGND sets fSW (100 kHz–1.2 MHz); must not be left floating |
| SS | Soft-start timing | Capacitor-to-AGND controls ramp time; 6 µA internal current source charges CSS |
| COMP | Error amplifier output | Transconductance amplifier output; requires external RC network for loop stability |
| SYNC | External clock input | Accepts 200 kHz–1.0 MHz square wave; enables synchronization to system clock |
| FB | Feedback voltage sense | Monitors output via resistor divider; regulated to 1.229 V reference |
| PGND | Power ground | Source connection of internal MOSFET; multiple pins reduce IR drop and improve thermal path |
| AGND | Analog ground | Signal reference for error amp, reference, and bias circuits; separate from PGND for noise isolation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-A, 40-V MOSFET | Eliminates external high-current switch, reducing BOM count and layout complexity in boost/SEPIC designs |
| Pulse-skipping mode | Maintains high efficiency at light loads by skipping switching cycles instead of entering burst mode |
| Programmable soft-start | Prevents inrush current and output overshoot using external capacitor on SS pin |
| Internal slope compensation | Enables stable current-mode control above 50% duty cycle without external components |
| Frequency synchronization | Allows EMI reduction by locking switching frequency to system clock or avoiding sensitive bands |
Applications
| USB Type-C Power Delivery | Industrial 24-V Power Rails |
|---|---|
Use Scenario: Generating 20 V output from 5 V or 9 V USB-C source to meet USB PD 3.0 PPS requirements. IC Role / Device Role / Timing Role: Primary nonsynchronous boost controller regulating output voltage with current-mode PWM and fast transient response. Use Value: Delivers up to 800 mA at 24 V with >90% efficiency at 600 kHz, supporting compact portable dock designs. | Use Scenario: Up-converting 12 V or 15 V intermediate rail to stable 24 V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: High-reliability SEPIC converter providing input-output isolation and bidirectional voltage capability. Use Value: Operates continuously from –40°C to 125°C ambient with thermal shutdown and UVLO protection. |
| Thunderbolt™ Port Power | ADSL Modem Power Supply |
Use Scenario: Providing 15 V or 20 V auxiliary power to Thunderbolt 3/4 host controllers and retimers in laptops and docks. IC Role / Device Role / Timing Role: Fixed-frequency boost regulator with programmable soft-start to meet strict power-rail sequencing requirements. Use Value: Achieves <1.2% output voltage deviation across line/load/temperature with ±0.7% reference accuracy. | Use Scenario: Generating isolated 12 V and –12 V rails from 5 V input in DSL line card power supplies. IC Role / Device Role / Timing Role: Flyback controller with transformer-isolated output enabling dual-polarity generation. Use Value: Supports 100% duty cycle operation and wide input range to accommodate varying AC line-derived DC inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61175RGTR | 3-A, 40-V switch; max VIN = 18 V; pin-to-pin compatible with TPS55340 in HTSSOP-14 package | Limited to lower input voltage (≤18 V); suitable for 5 V/12 V input systems only | Select when input never exceeds 18 V and 3-A output suffices; lower cost but reduced headroom |
| LM5122MH/NOPB | Synchronous boost controller (external MOSFETs); 65-V max VIN; no integrated switch; requires external gate drivers | Supports higher power (>10 W) and higher VIN (up to 65 V); needs more external components | Choose for >5-A output or >32-V input; adds design flexibility but increases complexity and footprint |
Compared with TPS61175RGTR, the TPS55340 extends input range to 32 V and doubles current capability to 5 A; versus LM5122MH/NOPB, it reduces BOM count and layout area by integrating the power switch while trading off maximum voltage and scalability.
Availability
TPS55340 is available at Aetrix Electronics and suitable for USB Type-C PD implementations, Thunderbolt port power delivery, and industrial 24-V power conversion requiring stable component supply across 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 company delivering analog and embedded processing solutions with leadership in power management ICs, precision analog, and high-reliability products.
The TPS55340 belongs to TI's wide-input-voltage DC/DC regulator product line, designed specifically for high-current boost, SEPIC, and flyback applications in space-constrained, thermally demanding systems such as portable computing and industrial automation.
FAQ
What topologies does the TPS55340 support?
The TPS55340 supports boost, SEPIC, and isolated flyback topologies through external component configuration. Its nonsynchronous architecture and integrated 5-A, 40-V MOSFET make it suitable for nonisolated step-up (boost), buck-boost (SEPIC), and transformer-coupled (flyback) designs. The device's wide 2.9–32-V input range and current-mode control ensure stable operation across all three configurations without topology-specific IC variants. Each topology requires distinct external passive component selection per TI's application notes.
How is switching frequency set on the TPS55340?
Switching frequency on the TPS55340 is set either by connecting an external resistor between the FREQ pin and AGND, or by applying an external clock signal to the SYNC pin. The resistor value determines frequency from 100 kHz to 1.2 MHz per the equation RFREQ(kΩ) = 57500 × fSW(kHz)⁻¹·⁰³. When using SYNC, the external clock must be within ±20% of the resistor-set frequency and have 10–90% duty cycle. The FREQ pin must always be terminated - leaving it open will cause malfunction.
What is the purpose of the COMP pin on the TPS55340?
The COMP pin on the TPS55340 is the output of the internal transconductance error amplifier (240–440 µS), used to implement feedback loop compensation. An external RC network connected between COMP and AGND sets the pole-zero locations for stability and transient response. This pin directly drives the PWM comparator and must not be shorted or loaded with excessive capacitance. Proper COMP compensation is critical for maintaining regulation accuracy and preventing oscillation, especially in SEPIC and flyback configurations where right-half-plane zeros exist.
Does the TPS55340 support light-load efficiency optimization?
Yes, the TPS55340 supports light-load efficiency optimization via pulse-skipping mode. When the voltage regulation loop demands an on-time shorter than the minimum 77 ns pulse width, the IC skips entire switching cycles rather than operating in discontinuous conduction mode with high ripple. This preserves efficiency below ~100 mA load while maintaining regulation. Pulse skipping is automatic and requires no external control - it activates based on internal comparator thresholds and is disabled during soft-start and frequency foldback events.
What thermal enhancements does the TPS55340 package include?
The TPS55340 uses two thermally optimized packages: the 3-mm × 3-mm WQFN-16 (RTE) and 5-mm × 4.4-mm HTSSOP-14 (PWP), both incorporating TI's PowerPAD technology. The exposed thermal pad must be soldered to a large copper area on the PCB, ideally connected via ≥4 thermal vias to internal ground planes. Thermal resistance values (RθJA = 43.3°C/W for QFN, 43.2°C/W for HTSSOP) reflect this construction. The junction-to-board (RθJB) and junction-to-case (RθJC) metrics confirm effective heat transfer paths, enabling continuous 5-A operation at up to 125°C ambient with proper layout.
TPS55340RTET 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)
TPS55340RTET FAQ
1.How can I place an order for TPS55340RTET through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55340RTET 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 TPS55340RTET reliable?
The price and inventory of TPS55340RTET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55340RTET is usually 5 days.
3.What payment methods are accepted for TPS55340RTET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55340RTET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55340RTET?
TPS55340RTET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55340RTET 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 TPS55340RTET?
For technical support, including TPS55340RTET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55340RTET requirements.
6.How does Aetrix verify that TPS55340RTET is sourced from the original manufacturer or authorized distributors?
All TPS55340RTET 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 TPS55340RTET meets industry standards.
7.What is the process for return or replacement of TPS55340RTET?
All TPS55340RTET units undergo pre-shipment inspection (PSI). If there is an issue with TPS55340RTET, 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 TPS55340RTET part is unused and in its original packaging.
Return procedure for TPS55340RTET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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