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Texas Instruments TPS55330RTER
- Part No.:
- TPS55330RTER
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS55330RTER.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,107
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Product details
Overview
TPS55330RTER from Texas Instruments is a monolithic nonsynchronous boost/SEPIC/flyback DC-DC regulator with an integrated 5-A, 24-V low-side N-channel MOSFET switch. It operates from 2.9 V to 16 V input, delivers up to 5.25 A peak switch current, regulates output voltage via ±0.7% reference (1.229 V), and supports programmable switching frequency from 100 kHz to 1.2 MHz - used in Thunderbolt port power docks and industrial 5-V/12-V conversion.
For engineers reviewing the TPS55330RTER datasheet, TPS55330RTER pinout, TPS55330RTER application, or TPS55330RTER equivalent, key selection considerations include its 3 mm × 3 mm QFN-16 PowerPAD™ package, cycle-by-cycle overcurrent protection with frequency foldback, soft-start programmability via external capacitor, pulse-skipping mode for light-load efficiency, and synchronization capability to external clock signals up to 1 MHz.
Technical Context
The TPS55330RTER 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, where an external RC network sets loop stability and transient response.
Switching frequency is set either by resistor on FREQ pin (100–1200 kHz range) or synchronized to external clock (200–1000 kHz); UVLO activates at 2.5 V (120 mV hysteresis), and thermal shutdown triggers at 165°C with 15°C hysteresis. The device supports three topologies - boost, SEPIC, and isolated flyback - using shared SW, FB, and PGND terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 16 V - supports multicell Li-ion batteries and regulated 3.3/5/12-V rails without pre-regulation. |
| Output Current Capability | 5.25 A peak switch current - enables high-power boost designs up to ~22 V output with appropriate external components. |
| Reference Voltage Accuracy | ±0.7% (1.229 V typ) - ensures tight output regulation across temperature and line/load conditions. |
| Quiescent Current | 0.5 mA - minimizes standby power loss in always-on systems like docking stations. |
| Switching Frequency Range | 100 kHz to 1.2 MHz - balances EMI, inductor size, and efficiency; adjustable via FREQ pin resistor or SYNC signal. |
| MOSFET RDS(on) | 60 mΩ (typ @ 5 V VIN) - reduces conduction losses and thermal stress in high-current applications. |
| Soft-Start Control | Programmable via external capacitor on SS pin - limits inrush current and prevents output overshoot during startup. |
Pinout & Package
TPS55330RTER uses a 3 mm × 3 mm, 16-pin WQFN package with exposed PowerPAD™ for enhanced thermal dissipation. The PowerPAD must be soldered to AGND and connected to internal ground planes via thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input supply rail | Accepts 2.9–16 V; powers internal circuitry and gate driver - separate from power stage input in SEPIC/flyback configurations. |
| SW (Pins 1,15,16) | Power switch drain node | Connects to inductor/transformer switched side; handles full switch current and voltage stress up to 24 V. |
| FB (Pin 8) | Feedback input | Senses output via resistor divider; regulates to 1.229 V reference - determines final output voltage accuracy. |
| EN (Pin 3) | Enable control | Logic-level input with 1.08 V rising threshold and 0.16 V hysteresis - allows precise system-level power sequencing. |
| COMP (Pin 7) | Error amplifier output | Drives external RC compensation network - critical for loop stability and transient response in all topologies. |
| FREQ (Pin 9) | Frequency programming | Resistor-to-ground sets switching frequency; must not be left floating - enables optimization for EMI or efficiency. |
| SYNC (Pin 5) | External clock input | Accepts 200–1000 kHz logic-level clock; requires FREQ resistor to be installed even when synchronizing. |
| PGND (Pins 11,12,13) | Power ground return | Low-impedance path for MOSFET source current - must be tightly coupled to PowerPAD and input/output capacitors. |
| AGND (Pin 6) | Analog ground reference | Reference for FB, COMP, SS, FREQ, SYNC - requires star grounding near IC to avoid noise coupling. |
| SS (Pin 4) | Soft-start timing | 6 µA internal current charges external capacitor - controls ramp rate of output voltage and peak switch current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-A, 24-V low-side MOSFET | Eliminates external switch and driver, reducing BOM count and layout complexity in boost/SEPIC/flyback designs. |
| Pulse-skipping at light loads | Maintains high efficiency (>90%) under low-output-current conditions by skipping switching cycles instead of forcing continuous operation. |
| Cycle-by-cycle overcurrent protection | Detects inductor current limit (5.25–7.75 A) each cycle - prevents MOSFET failure during short-circuit or overload events. |
| Frequency foldback under overcurrent | Reduces switching frequency to 25% of nominal when FB drops below 0.9 V - sustains regulation during sustained overload without thermal runaway. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and restarts only after cooling by 15°C - prevents repeated cycling near thermal limit. |
Applications
| Thunderbolt™ Power Docking | Industrial 12-V Rail Generation |
|---|---|
Use Scenario: Portable PC or tablet connects to dock supplying 5 V/12 V/20 V power and data via single USB-C cable. IC Role / Device Role / Timing Role: Boost regulator generating stable 12 V from 5-V USB-PD input; configured in high-efficiency continuous conduction mode. Use Value: Delivers >2 A at 12 V with <3% load regulation and <25 mV ripple - meets USB-IF PD 3.0 extended power range requirements. | Use Scenario: Factory automation controller requires isolated 12-V auxiliary rail from 24-V main bus for sensor interface and I/O modules. IC Role / Device Role / Timing Role: Flyback converter with transformer isolation; TPS55330RTER drives primary side with synchronous rectification on secondary. Use Value: Achieves >85% efficiency at full load while meeting IEC 61000-4-5 surge immunity via galvanic isolation - eliminates need for separate isolated DC-DC module. |
| ADSL/VDSL Line Card Power | Portable Medical Imaging Interface |
Use Scenario: DSLAM line card supplies ±12 V and 3.3 V to analog front-end and digital logic from single 12-V backplane. IC Role / Device Role / Timing Role: SEPIC topology generating non-inverting 12 V output from 12-V input - provides regulation despite input ripple and transient dips. Use Value: Maintains ±0.5% output accuracy over –40°C to +85°C ambient with no output capacitor derating - ensures ADC reference stability and DAC linearity. | Use Scenario: Handheld ultrasound probe interfaces with tablet host, requiring clean 5-V power for analog beamforming ASICs and memory. IC Role / Device Role / Timing Role: Boost converter stepping up battery voltage (3.0–4.2 V) to regulated 5 V; operates in pulse-skipping mode during idle periods. Use Value: Achieves 92% efficiency at 100 mA load and <10 µA shutdown current - extends battery life beyond 8 hours per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5122MH/NOPB | Higher 65-V input rating, external MOSFET required, no integrated switch - supports wider input range but increases component count. | Used in automotive 24-V systems with load dump; unsuitable for space-constrained portable designs due to external FET footprint. | Select when input exceeds 16 V or when design requires >24-V output; avoid if board area or BOM simplicity is critical. |
| TPS61178RVEL | 4-A integrated boost with 1.2-MHz fixed frequency, no SYNC or FREQ adjustment, lower 2.7-V min input - simpler configuration but less flexible frequency control. | Targeted at display backlight and SSD power; lacks frequency foldback and thermal hysteresis - less robust under sustained overload. | Choose for cost-sensitive, fixed-frequency applications with moderate current demand; not recommended for industrial overload-prone environments. |
Compared with LM5122MH/NOPB and TPS61178RVEL, the TPS55330RTER uniquely combines 5-A integration, wide 100-kHz–1.2-MHz programmability, frequency foldback, and –40°C to +150°C junction operation - making it optimal for thermally demanding, multi-topology, and high-reliability embedded power conversion.
Availability
TPS55330RTER is available at Aetrix Electronics and suitable for Thunderbolt docking stations, industrial 12-V power systems, and ADSL line cards requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS55330RTER 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 for industrial, automotive, and personal electronics markets.
The TPS55330RTER belongs to TI's high-current integrated DC-DC regulator product line, designed specifically for compact, efficient, and robust power conversion in portable computing, communications infrastructure, and industrial control equipment.
FAQ
What is the maximum output voltage achievable with the TPS55330RTER?
The TPS55330RTER supports output voltages up to 22 V, as specified in its recommended operating conditions. This limit arises from internal circuitry constraints and MOSFET voltage rating - exceeding 22 V risks damage or undefined behavior. For higher outputs, consider flyback topology with appropriate transformer turns ratio and secondary-side rectification, ensuring reflected primary voltage stays within the 24-V MOSFET rating.
Does the TPS55330RTER support true synchronous rectification?
No, the TPS55330RTER is a nonsynchronous regulator and does not integrate or drive a synchronous rectifier. It requires an external Schottky diode in boost and SEPIC configurations. In flyback mode, a secondary-side diode or external MOSFET (with separate gate driver) must be used - the TPS55330RTER only controls the primary-side switch.
Can the TPS55330RTER be used in a buck configuration?
No, the TPS55330RTER cannot operate as a buck converter. Its architecture is optimized for step-up (boost), buck-boost (SEPIC), and isolated (flyback) topologies only. The internal low-side switch and control loop are incompatible with buck operation - attempting buck use would result in failure to regulate or device damage.
How does the frequency foldback feature behave during startup?
Frequency foldback is disabled during soft-start. The TPS55330RTER begins operation at its programmed switching frequency (e.g., 600 kHz) and only enters foldback if FB drops below 0.9 V *after* soft-start completes. This prevents false triggering during initial capacitor charging and ensures reliable startup even under heavy pre-load conditions.
What is the minimum recommended inductor value for stable operation at 600 kHz?
For stable current-mode operation at 600 kHz with typical input/output conditions, TI recommends ≥2.2 µH. Lower values risk insufficient slope compensation, leading to subharmonic oscillation - especially above 50% duty cycle. The exact value depends on input voltage, output voltage, and output current; refer to Section 8.2.2.1 of the TPS55330RTER datasheet for full design equations and WEBENCH® validation.
TPS55330RTER 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, Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- 22V
- 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)
TPS55330RTER FAQ
1.How can I place an order for TPS55330RTER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55330RTER 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 TPS55330RTER reliable?
The price and inventory of TPS55330RTER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55330RTER is usually 5 days.
3.What payment methods are accepted for TPS55330RTER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55330RTER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55330RTER?
TPS55330RTER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55330RTER 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 TPS55330RTER?
For technical support, including TPS55330RTER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55330RTER requirements.
6.How does Aetrix verify that TPS55330RTER is sourced from the original manufacturer or authorized distributors?
All TPS55330RTER 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 TPS55330RTER meets industry standards.
7.What is the process for return or replacement of TPS55330RTER?
All TPS55330RTER units undergo pre-shipment inspection (PSI). If there is an issue with TPS55330RTER, 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 TPS55330RTER part is unused and in its original packaging.
Return procedure for TPS55330RTER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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