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Texas Instruments TPS55340PWP
- Part No.:
- TPS55340PWP
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS55340PWP.pdf
- Description:
- IC REG BOOST ADJ 5.25A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
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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 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, programmable soft-start, cycle-by-cycle current limiting, thermal shutdown, 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 ensure stability at duty cycles >50%. 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 implements pulse-skipping mode under light loads for higher efficiency, features a 77-ns minimum on-time, and enters frequency foldback (to 1/4 fSW) when FB drops below 0.9 V during overcurrent events-reducing stress while maintaining regulation recovery upon fault clearance.
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) without pre-regulation. |
| Switch Rating | 5-A, 40-V N-channel MOSFET - delivers up to 5.25 A peak current with RDS(on) = 60–110 mΩ, enabling high-power density boost stages. |
| Reference Voltage | 1.229 V ±0.7% - ensures precise output regulation (e.g., 24 V ±0.17 V) using standard resistor dividers. |
| 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 with fast wake-up via EN pin. |
| Switching Frequency | 100 kHz to 1.2 MHz - adjustable via FREQ pin resistor or external SYNC clock for EMI optimization and size trade-offs. |
| Operating Junction Temp | –40°C to 150°C - rated for harsh environments including automotive under-hood and industrial motor controls. |
Pinout & Package
TPS55340PWP is packaged in HTSSOP-14 (5.00 mm × 4.40 mm) with PowerPAD™ for enhanced thermal dissipation. The exposed thermal pad must be soldered to AGND with thermal vias for reliable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.9–32 V; powers internal circuitry and gate driver; separate from power stage input in SEPIC/flyback configurations. |
| EN | Enable control input | Logic-level enable with 0.92–1.08 V threshold and 0.16 V hysteresis; internal 950-kΩ pulldown ensures safe default-off state. |
| SW | Power switch drain | Connects to inductor/transformer switched node; handles peak currents up to 7.75 A; requires low-inductance layout. |
| FREQ | Frequency programming | Resistor-to-AGND sets fSW (100 kHz–1.2 MHz); must not be left floating; enables EMI tuning and transformer sizing. |
| SS | Soft-start timing | Capacitor-to-AGND programs startup ramp; 6-µA internal current source limits inrush and output overshoot. |
| COMP | Error amplifier output | Drives external RC compensation network; transconductance 240–440 µS enables stable loop design across temperature. |
| SYNC | External clock input | Accepts 200 kHz–1.0 MHz logic signal; allows synchronization to system clock or noise-sensitive bands. |
| FB | Feedback voltage sense | Regulates to 1.229 V; connects to resistor divider; bias current <20 nA minimizes divider error. |
| PGND | Power ground | Source connection of internal MOSFET; three pins (12,13,14) reduce ground impedance and improve current handling. |
| AGND | Analog ground | Signal reference for error amp, reference, and logic; must be separated from PGND and connected to PowerPAD via low-impedance path. |
| NC | No-connect | Pin 11 - must be tied to AGND per TI recommendation to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-A, 40-V MOSFET | Eliminates external high-current switch; reduces BOM count and PCB area in space-constrained USB-C and docking applications. |
| Pulse-skipping at light loads | Maintains >85% efficiency down to 10-mA loads by disabling switching cycles-critical for battery-powered standby operation. |
| Cycle-by-cycle current limit | Protects against short-circuit and overload with 5.25–7.75 A threshold; prevents MOSFET failure without external sensing components. |
| Programmable soft-start | Capacitor-controlled ramp prevents input inrush and output overshoot during hot-plug events in Thunderbolt and docking stations. |
| Thermal shutdown + hysteresis | Shuts down at 165°C junction temp and restarts at 150°C-enables self-recovery in thermally constrained enclosures without system reset. |
Applications
| USB Type-C Power Delivery | Industrial 24-V Power Systems |
|---|---|
Use Scenario: Provides regulated 20-V output from 5-V or 12-V bus to meet USB PD 3.0 specifications in portable docks and adapters. IC Role / Device Role / Timing Role: Nonsynchronous boost controller managing power stage timing, current sensing, and feedback regulation. Use Value: Delivers up to 800 mA at 20 V with <120 mV ripple using single-stage conversion-reducing component count vs. two-stage solutions. | Use Scenario: Generates isolated 24-V auxiliary supply from 12-V vehicle or factory bus in PLC I/O modules and sensor transmitters. IC Role / Device Role / Timing Role: Flyback controller implementing primary-side regulation with fixed-frequency PWM and slope compensation. Use Value: Supports –40°C to 125°C ambient operation with 150°C max junction temp-ensuring reliability in uncooled industrial cabinets. |
| Thunderbolt Port Power | ADSL Modem Power Supply |
Use Scenario: Supplies 3.3-V, 5-V, and 12-V rails from a single 5-V input in Thunderbolt 3/4 host controllers and expansion docks. IC Role / Device Role / Timing Role: Multi-rail boost/SEPIC controller with independent feedback loops and synchronized switching to minimize crosstalk. Use Value: Achieves >90% efficiency at 500-mA loads across all rails while meeting strict EMI limits via programmable fSW. | Use Scenario: Powers line-driver ICs and analog front-ends in legacy ADSL modems requiring 3.3-V and 12-V outputs from 5-V or 12-V inputs. IC Role / Device Role / Timing Role: Dual-output SEPIC regulator providing non-inverting, isolated, and ripple-suppressed supplies. Use Value: Enables single-chip solution replacing discrete DC/DC + LDO combinations-cutting BOM cost and board space by 35%. |
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; max 18-V input; HTSSOP-14 pinout identical but lower current rating and narrower VIN range. | Suitable only for ≤3-A, ≤18-V input applications; cannot replace TPS55340PWP in 32-V or 5-A designs. | Select when lower cost and reduced thermal requirements justify current/voltage derating. |
| LM5122MH/NOPB | 5-A, 65-V synchronous boost controller; external MOSFETs; requires more external components; no integrated switch. | Supports higher input voltages and synchronous rectification for >95% efficiency; used where thermal headroom or efficiency is critical. | Choose for designs needing >32-V input, >95% efficiency, or custom MOSFET selection-accepting larger footprint and complexity. |
Compared with TPS61175RGT and LM5122MH/NOPB, the TPS55340PWP uniquely combines 5-A/40-V integration, 32-V input support, and HTSSOP-14 pin compatibility-making it optimal for compact, high-current boost/SEPIC designs where board space and component count are constrained.
Availability
TPS55340PWP is available at Aetrix Electronics and suitable for USB Type-C PD, Thunderbolt port power delivery, and industrial 24-V power systems requiring stable component supply across long production lifecycles.
Supply support for TPS55340PWP 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in power management ICs.
The TPS55340 belongs to TI's wide-input-voltage DC/DC regulator product line, designed specifically for high-current, multi-topology power conversion in portable, industrial, and communications equipment where integration, thermal robustness, and topology flexibility are essential.
FAQ
What topologies does the TPS55340PWP support?
The TPS55340PWP supports boost, SEPIC, and isolated flyback topologies. Its nonsynchronous architecture, integrated 5-A/40-V MOSFET, and current-mode control enable direct implementation of all three without external switches. Design examples for each are provided in the official datasheet, and WEBENCH Power Designer generates complete schematics and BOMs for any selected topology.
Does the TPS55340PWP require external compensation?
Yes, the TPS55340PWP requires external RC compensation connected to the COMP pin. The transconductance error amplifier (240–440 µS) drives this node, and proper compensation-typically a series RC network-is necessary to stabilize the feedback loop, ensure phase margin >45°, and optimize transient response. TI provides design equations and example values in Section 8.2.1.2.2 of the datasheet.
What is the minimum on-time of the TPS55340PWP and why does it matter?
The TPS55340PWP has a minimum on-time of 77 ns (typical). This limits the lowest achievable duty cycle at high switching frequencies and determines when pulse-skipping mode activates-typically under light loads where regulation would otherwise require sub-77-ns pulses. It directly impacts light-load efficiency and output ripple behavior in discontinuous conduction mode.
How does the TPS55340PWP handle overcurrent conditions?
The TPS55340PWP uses cycle-by-cycle current limiting with a threshold of 5.25–7.75 A. During overload, it clamps peak switch current and reduces switching frequency to 1/4 nominal (frequency foldback) if FB falls below 0.9 V-preventing thermal runaway while maintaining regulation. Recovery occurs automatically once the fault clears and FB rises above 0.9 V.
Can the TPS55340PWP be synchronized to an external clock?
Yes, the TPS55340PWP supports external clock synchronization via the SYNC pin. It accepts logic-level signals from 200 kHz to 1.0 MHz with 10–90% duty cycle. When synchronized, the FREQ pin must still be terminated with a resistor to ground, and the external clock must stay within ±20% of the resistor-set frequency for stable operation-enabling EMI reduction in noise-sensitive systems.
TPS55340PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
TPS55340PWP FAQ
1.How can I place an order for TPS55340PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55340PWP 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 TPS55340PWP reliable?
The price and inventory of TPS55340PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55340PWP is usually 5 days.
3.What payment methods are accepted for TPS55340PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55340PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55340PWP?
TPS55340PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55340PWP 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 TPS55340PWP?
For technical support, including TPS55340PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55340PWP requirements.
6.How does Aetrix verify that TPS55340PWP is sourced from the original manufacturer or authorized distributors?
All TPS55340PWP 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 TPS55340PWP meets industry standards.
7.What is the process for return or replacement of TPS55340PWP?
All TPS55340PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS55340PWP, 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 TPS55340PWP part is unused and in its original packaging.
Return procedure for TPS55340PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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