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Texas Instruments TPS55340MRTETEP
- Part No.:
- TPS55340MRTETEP
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS55340MRTETEP.pdf
- Description:
- IC REG BOOST ADJ 5.25A 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:832
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Product details
Overview
TPS55340MRTETEP from Texas Instruments is a radiation-tolerant, monolithic non-synchronous DC-DC regulator with integrated 5-A, 40-V low-side N-channel MOSFET, supporting boost/SEPIC/flyback topologies across 2.9–32 V input and up to 38 V output. It delivers ±0.7% reference accuracy, 0.5-mA quiescent current, and operates from –55°C to 125°C for aerospace power conversion.
For engineers reviewing the TPS55340MRTETEP datasheet, TPS55340MRTETEP pinout, TPS55340MRTETEP application, or TPS55340MRTETEP equivalent, key selection criteria include its extended temperature range, military-grade traceability, programmable 100 kHz–1.2 MHz switching frequency, cycle-by-cycle overcurrent protection, and compatibility with multi-cell battery and industrial rail inputs (3.3 V, 5 V, 12 V, 24 V).
Technical Context
The TPS55340MRTETEP 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 µmho) drives the COMP pin for loop stability via external RC compensation.
It supports three distinct operating modes: resistor-programmed frequency (via FREQ pin), external clock synchronization (200 kHz–1 MHz), and pulse-skipping at light loads. Protection includes undervoltage lockout (2.5–2.7 V threshold), thermal shutdown (165°C), and cycle-by-cycle current limiting (5.25–8.25 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 32 V - supports multi-cell Li-ion, 3.3/5/12/24-V rails, and transient-tolerant industrial inputs |
| Output Voltage Range | VIN to 38 V - enables high-ratio boost and isolated flyback configurations |
| Switch Rating | 5-A, 40-V N-channel MOSFET - handles peak inductor currents up to 8.25 A with cycle-by-cycle limiting |
| Reference Voltage | 1.229 V ±0.7% - sets output accuracy via FB-resistor divider; stable over –55°C to 125°C |
| Quiescent Current | 0.5 mA - minimizes standby power loss in always-on aerospace subsystems |
| Shutdown Current | 2.7 µA - enables ultra-low-power disable state for mission-critical sequencing |
| Switching Frequency | 100 kHz to 1.2 MHz - adjustable via FREQ resistor or SYNC pin; supports EMI optimization and size-efficiency tradeoffs |
| Operating Temperature | –55°C to 125°C - qualified for military/aerospace environments with controlled baseline and extended lifecycle |
Pinout & Package
TPS55340MRTETEP uses a thermally enhanced 16-pin WQFN (3.00 mm × 3.00 mm) package with exposed PowerPAD™ soldered to AGND for improved thermal dissipation (RθJC(bot) = 3.5°C/W). The PowerPAD requires thermal vias to internal ground planes per TI layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1, 13, 14) | Power switch drain | Connects to inductor/transformer switched node; carries full peak current; requires short, low-inductance routing |
| VIN (2) | Main supply input | Accepts 2.9–32 V; decoupled locally to AGND; independent of boost-stage input in SEPIC/flyback |
| EN (3) | Enable control | Logic-compatible input; 0.9–1.3 V threshold with 0.1–0.22 V hysteresis; internal 950-kΩ pulldown |
| SS (4) | Soft-start timing | 6-µA bias current charges external capacitor; clamps COMP during startup to limit inrush and overshoot |
| SYNC (5) | External clock input | Accepts 0.4–1.2 V logic; synchronizes switching to 200 kHz–1 MHz; tie to AGND if unused |
| AGND (6) | Analog ground reference | Signal return for FB, COMP, FREQ, SS; separate from PGND to minimize noise coupling |
| COMP (7) | Error amplifier output | Drives external RC compensation network; transconductance 240–440 µmho; clamp limits ±0.75/3.1 V |
| FB (8) | Feedback sense | High-impedance (1.6–30 nA bias) input referenced to 1.229 V; connects to resistor divider center tap |
| FREQ (9) | Frequency programming | 1.25 V reference; resistor to AGND sets frequency (e.g., 480 kΩ → ~94 kHz); never left floating |
| NC (10, 12) | No-connect | Reserved pins; must be tied to AGND per datasheet |
| PGND (11, 15, 16) | Power ground | Source connection for internal MOSFET; high-current return path; tied to PowerPAD |
| PowerPAD (17) | Thermal & electrical ground | Exposed pad; must be soldered to AGND plane with ≥4 thermal vias for RθJA = 43.3°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-A, 40-V MOSFET | Eliminates external high-voltage switch; reduces BOM count and layout complexity in space-constrained avionics |
| Pulse-skipping mode | Maintains regulation at light loads without forcing continuous conduction; improves efficiency below ~100 mA output |
| Programmable soft-start | Capacitor-controlled ramp on SS pin prevents inrush current and output overshoot during cold start or reset |
| Frequency foldback under overload | Reduces switching frequency to 25% when FB drops below 0.9 V; sustains output during sustained overcurrent without latch-off |
| Internal slope compensation | Enables stable current-mode control >50% duty cycle without external components; avoids subharmonic oscillation |
| Military-grade qualification | Controlled baseline, single fab/test site, extended lifecycle, and full traceability meet MIL-PRF-38535 Class V requirements |
Applications
| Avionics Power Distribution | Spacecraft Payload Regulation |
|---|---|
Use Scenario: Regulating 28-V bus to 36-V for RF front-end amplifiers in satellite transponders under thermal vacuum and radiation exposure. IC Role / Device Role / Timing Role: Non-synchronous boost controller managing isolated power delivery with radiation-hardened feedback loop stability. Use Value: 40-V switch rating withstands load-dump transients; ±0.7% reference ensures precise RF bias voltage; –55°C to 125°C operation survives orbital thermal cycling. | Use Scenario: Generating 15-V bias for scientific instrument sensors from a 5-V spacecraft bus, requiring minimal EMI and high reliability over 15-year mission life. IC Role / Device Role / Timing Role: SEPIC topology DC-DC converter providing galvanic isolation and input-output continuity during bus dips. Use Value: Integrated MOSFET eliminates discrete HV switch failure point; pulse-skipping extends battery life; traceable manufacturing supports NASA Class S compliance. |
| Defense Radar Power Supply | Medical Imaging System DC Rail |
Use Scenario: Converting 12-V vehicle battery to 48-V for GaN-based radar transmitter modules in mobile command platforms. IC Role / Device Role / Timing Role: High-current boost regulator operating at 600 kHz to minimize inductor size while meeting MIL-STD-461 EMI limits. Use Value: 5-A switch handles 3-A continuous output; programmable frequency avoids sensitive IF bands; thermal shutdown protects against battlefield ambient extremes. | Use Scenario: Providing stable 24-V auxiliary rail for CT scanner detector readout ASICs, where microvolt-level noise could corrupt X-ray data. IC Role / Device Role / Timing Role: Low-noise flyback controller with synchronized switching to suppress conducted emissions into analog signal chains. Use Value: COMP pin RC compensation enables <100 µVpp output ripple; AGND/PGND separation reduces ground bounce; medical-grade traceability satisfies IEC 62304. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61175RGT | 3-A, 40-V switch; 18-V max input; not radiation-hardened; commercial temperature range only | Lacks military qualification, lower current capability, and reduced input range limits use in high-reliability aerospace systems | Consider only for cost-sensitive terrestrial industrial designs where radiation tolerance and extended temperature are unnecessary |
| LM5122MH/NOPB | 2.5-A, 65-V synchronous boost controller; external MOSFETs required; no integrated switch | Requires additional high-side/high-voltage FETs and gate drivers; higher component count but supports >40-V output | Select when output voltage exceeds 38 V or when synchronous rectification is mandatory for >90% efficiency at full load |
Compared with TPS61175RGT, the TPS55340MRTETEP provides +2-A current headroom, +14-V input range extension, and full military qualification-critical for launch-critical subsystems. Versus LM5122MH/NOPB, it trades external FET flexibility for BOM reduction and guaranteed radiation performance in compact SWaP-constrained payloads.
Availability
TPS55340MRTETEP is available at Aetrix Electronics and suitable for aerospace power distribution, defense radar subsystems, and medical imaging equipment requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for TPS55340MRTETEP 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 high-reliability ICs, with decades of heritage in space-grade and military-qualified power management solutions.
The TPS55340-EP product line was designed specifically for defense, aerospace, and medical applications requiring extended temperature operation, controlled manufacturing baselines, and full product traceability under MIL-PRF-38535.
FAQ
What is the maximum output voltage supported by the TPS55340MRTETEP?
The TPS55340MRTETEP supports an output voltage up to 38 V, as specified in the Recommended Operating Conditions table. This limit is determined by the 40-V MOSFET's breakdown margin and internal protection circuitry. Exceeding 38 V risks violating absolute maximum ratings on the SW pin and may trigger overvoltage protection or device failure. For flyback configurations, output voltage depends on transformer turns ratio and input conditions, but the regulated output must remain ≤38 V.
Does the TPS55340MRTETEP require external compensation components?
Yes, the TPS55340MRTETEP requires an external RC network connected to the COMP pin to stabilize the feedback loop. The transconductance error amplifier's output drives this network, and proper compensation is essential for transient response and phase margin. TI provides design equations and typical values in the datasheet's Section 9.2.1.2.3; omitting or mis-sizing these components causes instability, oscillation, or poor load regulation in the TPS55340MRTETEP.
Can the TPS55340MRTETEP operate in SEPIC topology with a single inductor?
No, the TPS55340MRTETEP requires two coupled inductors or a transformer for SEPIC operation - one for energy storage and one for coupling - as confirmed in the Functional Block Diagram and Typical Applications section. While the IC supports SEPIC configuration, it does not integrate magnetic components. A single inductor cannot fulfill both the energy transfer and DC isolation roles mandated by SEPIC topology; using one would violate the converter's operating principle and cause failure of the TPS55340MRTETEP.
What is the purpose of the NC pins on the TPS55340MRTETEP?
The NC pins (pins 10 and 12) on the TPS55340MRTETEP are reserved for future functionality and must be connected to AGND per the Pin Functions table. Leaving them floating violates the recommended operating conditions and may introduce noise coupling or latch-up risk. TI explicitly states in Table 6-1 that NC pins "must be connected to ground," making proper grounding a mandatory design requirement-not optional-for reliable operation of the TPS55340MRTETEP.
How does the TPS55340MRTETEP handle overcurrent events?
The TPS55340MRTETEP implements cycle-by-cycle overcurrent protection that disables the internal MOSFET when sensed current exceeds 5.25–8.25 A. If the overload persists and FB voltage drops below 0.9 V, it activates frequency foldback-reducing switching frequency to 25% of nominal-to sustain regulation without thermal shutdown. Recovery occurs automatically once FB rises above 0.9 V, ensuring robust fault handling in the TPS55340MRTETEP without requiring external circuitry or system intervention.
TPS55340MRTETEP 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (3x3)
TPS55340MRTETEP FAQ
1.How can I place an order for TPS55340MRTETEP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55340MRTETEP 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 TPS55340MRTETEP reliable?
The price and inventory of TPS55340MRTETEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55340MRTETEP is usually 5 days.
3.What payment methods are accepted for TPS55340MRTETEP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55340MRTETEP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55340MRTETEP?
TPS55340MRTETEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55340MRTETEP 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 TPS55340MRTETEP?
For technical support, including TPS55340MRTETEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55340MRTETEP requirements.
6.How does Aetrix verify that TPS55340MRTETEP is sourced from the original manufacturer or authorized distributors?
All TPS55340MRTETEP 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 TPS55340MRTETEP meets industry standards.
7.What is the process for return or replacement of TPS55340MRTETEP?
All TPS55340MRTETEP units undergo pre-shipment inspection (PSI). If there is an issue with TPS55340MRTETEP, 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 TPS55340MRTETEP part is unused and in its original packaging.
Return procedure for TPS55340MRTETEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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