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Texas Instruments TPS6282518DMQT
- Part No.:
- TPS6282518DMQT
- Manufacturer:
- Texas Instruments
- Package:
- 6-VFDFN
- Datasheet:
-
TPS6282518DMQT.pdf
- Description:
- IC REG BUCK 1.8V 2A 6VSON
- Quantity:
- Payment:
- Shipping:
Inventory:14,234
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Product details
Overview
TPS6282518DMQT from Texas Instruments is a 2A synchronous step-down DC/DC converter with fixed 1.8V output, DCS-Control topology, 1% output voltage accuracy over –40°C to 125°C, 2.2MHz switching frequency, and 4μA quiescent current - designed for high-efficiency point-of-load regulation in space-constrained portable and industrial systems.
For engineers reviewing the TPS6282518DMQT datasheet, TPS6282518DMQT pinout, TPS6282518DMQT application, or TPS6282518DMQT equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal behavior, real-world efficiency curves at 1.8V, and two rigorously cross-checked alternative parts for design flexibility.
Technical Context
The TPS6282518DMQT implements adaptive constant-on-time DCS-Control with seamless PWM-to-PSM mode transition, enabling fast transient response and stable regulation down to 0.6V (though fixed at 1.8V for this variant). Its internal 7.5MΩ feedback divider eliminates external resistors while maintaining 1% output accuracy across temperature.
It integrates 26mΩ high-side and 25mΩ low-side MOSFETs, supports 100% duty-cycle operation for ultra-low dropout, and features active output discharge, open-drain power-good signaling with 100μs deglitch delay, and hiccup-mode short-circuit protection triggered after 32 switching cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (–40°C to 125°C), eliminating need for external feedback resistors |
| Max Output Current | 2A continuous - sufficient for powering dual-core microcontrollers or FPGA I/O banks |
| Input Voltage Range | 2.4V to 5.5V - compatible with single-cell Li-ion, USB PD, and 3.3V/5V rails |
| Quiescent Current | 4μA in PSM mode - extends battery runtime in always-on sensor nodes and wearables |
| Switching Frequency | 2.2MHz nominal - enables use of compact 470nH inductors and reduces EMI filtering footprint |
| Thermal Shutdown | 150°C threshold with 20°C hysteresis - protects against sustained overload in sealed enclosures |
| Power-Good Accuracy | ±2% window (94–107% of VOUT) with 100μs rising-edge blanking - ensures reliable rail sequencing |
Pinout & Package
TPS6282518DMQT uses a 6-pin 1.5mm × 1.5mm VSON-HR (DMQ) package with wettable flanks for automated optical inspection and high thermal performance (RθJA = 129.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control (VIH = 1.0V min); 0.05μA shutdown current prevents battery drain |
| PG | Power-good open-drain output | Sinks up to 1mA; requires external pullup ≤5.5V; used for supply sequencing or fault indication |
| FB | Feedback input | Internally connected to 1.8V output via 7.5MΩ divider - no external resistors required |
| GND | Power and signal ground | Common reference for all circuitry; must be low-impedance connection to minimize noise |
| SW | Power switch node | Connects to external 470nH inductor; carries high di/dt - requires tight layout and Kelvin grounding |
| VIN | Input voltage supply | Accepts 2.4–5.5V; requires 4.7μF ceramic capacitor placed within 2mm of pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers <10μs load transient response with minimal output capacitance (2×10μF typical) |
| 100% duty-cycle operation | Enables dropout as low as IOUT × RDS(on) - critical for Li-ion battery systems near end-of-discharge |
| Active output discharge | 75–400mA sink current discharges VOUT to GND during shutdown - prevents back-powering of downstream logic |
| Forced-PWM compatibility | Pin-compatible with TPS62825ADMQ - allows CCM-only operation to reduce output ripple in noise-sensitive analog circuits |
| Hiccup short-circuit protection | 100μs off-time limits average power during sustained shorts - avoids thermal runaway without latch-off |
Applications
| Solid State Drive (SSD) Power Rail | Industrial PC Core Logic Supply |
|---|---|
Use Scenario: Regulating 1.8V for NAND flash I/O interface and controller core logic in embedded SSD modules. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering clean, tightly regulated 1.8V at up to 2A with fast transient recovery during burst writes. Use Value: 1% output accuracy ensures NAND timing margins are preserved; 4μA quiescent current minimizes standby power in sleep-mode storage devices. |
Use Scenario: Powering ARM-based SoC I/O banks and peripheral interfaces in fanless industrial PCs operating in wide-temperature environments. IC Role / Device Role / Timing Role: High-density buck converter providing stable 1.8V under dynamic CPU load changes and ambient temperatures from –40°C to 85°C. Use Value: DCS-Control enables sub-10μs transient response to maintain signal integrity; 125°C junction rating supports convection-cooled designs. |
| Analog Security Camera Sensor Bias | Portable Electronics System Rail |
Use Scenario: Generating low-noise 1.8V bias for CMOS image sensor analog front-end (AFE) and ADC reference in IP security cameras. IC Role / Device Role / Timing Role: Low-ripple, high-PSRR power source with forced-PWM option to suppress switching noise coupling into analog signal paths. Use Value: 2.2MHz fixed frequency allows predictable EMI filtering; active discharge prevents sensor latch-up during power cycling. |
Use Scenario: Supplying 1.8V to Bluetooth SoCs, PMIC subsystems, and display drivers in battery-powered handheld devices. IC Role / Device Role / Timing Role: Ultra-low-IQ buck converter enabling multi-week standby life while supporting rapid wake-up bursts. Use Value: 4μA quiescent current directly extends battery runtime; 1.5mm × 1.5mm package saves PCB area in compact form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62825ADMQ | Adjustable output (0.6–4V), forced-PWM only, same 2A rating and DMQ package | Requires external FB resistors; preferred where fixed-frequency CCM is mandatory for EMI control | Select when ripple-sensitive analog loads demand deterministic 2.2MHz operation without PSM modulation |
| TPS6282618DMQT | 3A rated, identical 1.8V fixed output, same DCS-Control and package | Higher current headroom for future-proofing or parallel use; slightly higher RDS(on) (25/24mΩ) | Choose when system peak load may exceed 2A or when margin for thermal derating is required |
Compared with TPS6282518DMQT, TPS62825ADMQ trades adjustability and forced-PWM determinism for added design complexity, while TPS6282618DMQT provides +1A headroom at minor efficiency cost - both retain pin compatibility and thermal footprint.
Availability
TPS6282518DMQT is available at Aetrix Electronics and suitable for solid-state drives, industrial PCs, analog security cameras, and portable electronics requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS6282518DMQT 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-efficiency DC/DC conversion.
The TPS6282x family was engineered for ultra-small-footprint, high-accuracy point-of-load regulation in battery-powered and thermally constrained applications - emphasizing low IQ, fast transient response, and seamless mode transitions.
FAQ
What is the output voltage tolerance of the TPS6282518DMQT over temperature?
The TPS6282518DMQT guarantees ±1% output voltage accuracy across the full –40°C to 125°C junction temperature range. This is achieved via an internal precision voltage reference and trimmed feedback divider, eliminating drift-related calibration in automotive and industrial deployments. The TPS6282518DMQT maintains this spec without external components.
Does the TPS6282518DMQT require external feedback resistors?
No - the TPS6282518DMQT integrates a factory-trimmed 7.5MΩ resistor divider that sets the output to precisely 1.8V. The FB pin is internally connected to the output, so external resistors and feedforward capacitors are unnecessary. This simplifies layout, reduces BOM count, and improves reliability versus adjustable variants like TPS62825DMQ.
How does the TPS6282518DMQT handle short-circuit conditions?
The TPS6282518DMQT employs hiccup-mode short-circuit protection: upon detecting overcurrent for 32 consecutive switching cycles (~13μs), it disables the high-side FET for 100μs, allowing inductor current to decay, then restarts with soft-start. This limits average power dissipation and prevents thermal damage without latching off - a key safety feature for unattended systems using TPS6282518DMQT.
Can the TPS6282518DMQT operate with input voltage below 2.4V?
No - the TPS6282518DMQT has a 2.2V undervoltage lockout (UVLO) threshold with 160mV hysteresis, and its recommended minimum input is 2.4V. Operation below this risks instability or shutdown. For sub-2.4V inputs, consider TI's TPS62864 (1.8V–5.5V input) or alternate families - the TPS6282518DMQT is not rated for such conditions.
What is the thermal resistance of the TPS6282518DMQT package?
The TPS6282518DMQT in its 1.5mm × 1.5mm DMQ (VSON-HR) package has a junction-to-ambient thermal resistance (RθJA) of 129.5°C/W under JEDEC standard conditions. With proper PCB copper pour (≥2 cm² 2oz thermal pad), actual board-level RθJA can improve to ~70°C/W - critical for sustaining 2A continuous output in sealed enclosures using TPS6282518DMQT.
TPS6282518DMQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-VFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-VSON-HR (1.5x1.5)
TPS6282518DMQT FAQ
1.How can I place an order for TPS6282518DMQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6282518DMQT 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 TPS6282518DMQT reliable?
The price and inventory of TPS6282518DMQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6282518DMQT is usually 5 days.
3.What payment methods are accepted for TPS6282518DMQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6282518DMQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6282518DMQT?
TPS6282518DMQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6282518DMQT 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 TPS6282518DMQT?
For technical support, including TPS6282518DMQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6282518DMQT requirements.
6.How does Aetrix verify that TPS6282518DMQT is sourced from the original manufacturer or authorized distributors?
All TPS6282518DMQT 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 TPS6282518DMQT meets industry standards.
7.What is the process for return or replacement of TPS6282518DMQT?
All TPS6282518DMQT units undergo pre-shipment inspection (PSI). If there is an issue with TPS6282518DMQT, 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 TPS6282518DMQT part is unused and in its original packaging.
Return procedure for TPS6282518DMQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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