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Texas Instruments TPS6282518DMQR
- Part No.:
- TPS6282518DMQR
- Manufacturer:
- Texas Instruments
- Package:
- 6-VFDFN
- Datasheet:
-
TPS6282518DMQR.pdf
- Description:
- IC REG BUCK 1.8V 2A 6VSON
- Quantity:
- Payment:
- Shipping:
Inventory:8,286
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Product details
Overview
TPS6282518DMQR 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 - used in power rails for industrial PCs and security cameras requiring high light-load efficiency and compact footprint.
For engineers reviewing the TPS6282518DMQR datasheet, TPS6282518DMQR pinout, TPS6282518DMQR application, or TPS6282518DMQR equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal behavior, real-world application constraints, and two technically documented alternative parts for design flexibility.
Technical Context
The TPS6282518DMQR 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, and active output discharge ensures controlled shutdown.
It integrates 26mΩ high-side and 25mΩ low-side MOSFETs, supports 100% duty cycle operation for ultra-low dropout, and features hiccup-mode short-circuit protection plus thermal shutdown at 150°C with 20°C hysteresis - all in a 1.5mm × 1.5mm VSON-HR (DMQ) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (±18mV) over –40°C to 125°C junction temperature - enables precise core rail regulation without external feedback components. |
| Max Output Current | 2A continuous - sufficient for FPGA I/O banks, camera ISP cores, or SSD controller logic rails. |
| Input Voltage Range | 2.4V to 5.5V - compatible with single-cell Li-ion, USB PD, and 3.3V/5V system rails. |
| Quiescent Current | 4μA in PSM mode - extends battery runtime in always-on portable electronics and surveillance sensors. |
| Switching Frequency | 2.2MHz nominal - allows use of sub-1μH inductors and reduces EMI filter size for space-constrained PCBs. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Power-Good Accuracy | ±4% window (96%–104% of nominal) with 100μs deglitch - enables reliable sequencing with downstream converters or processors. |
Pinout & Package
TPS6282518DMQR uses a 6-pin 1.5mm × 1.5mm VSON-HR (DMQ) package with wettable flanks for automated optical inspection. Thermal pad on underside requires solder connection to PCB ground plane for optimal thermal performance (RθJA = 129.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control; threshold ~0.9V (VIH), must not float - enables system-level power sequencing. |
| PG | Open-drain power-good output | Sinks up to 1mA; requires external pull-up ≤5.5V - signals valid output voltage for downstream enable or fault monitoring. |
| FB | Feedback input | Internally connected to 1.8V output via 7.5MΩ divider - no external resistors needed for fixed-output operation. |
| GND | Power and signal ground | Common reference for control circuitry and power stage - must be low-impedance connection to thermal pad. |
| SW | Switch node | Connects to inductor and output capacitor - carries high di/dt; requires tight layout and minimal trace length. |
| VIN | Input power supply | Accepts 2.4–5.5V; requires local 4.7μF ceramic decoupling - feeds both control circuitry and power switches. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers <10μs load transient response with <1% output deviation - critical for burst-mode imaging sensors and real-time controllers. |
| 1% output voltage accuracy | Maintains ±18mV tolerance across full temperature and line/load range - eliminates need for post-regulation trimming in precision analog subsystems. |
| Active output discharge | Provides 75–400mA sink current through SW pin during disable - prevents floating outputs and ensures clean reset in multi-rail systems. |
| 100% duty cycle operation | Supports VIN as low as VOUT + IOUT×RDS(on) + IOUT×RL - enables operation near battery end-of-life in portable devices. |
| Hiccup short-circuit protection | Shuts down for 100μs after 32-cycle overcurrent detection - limits average power dissipation and avoids thermal runaway during sustained faults. |
Applications
| Industrial PC Power Rail | Analog Security Camera Core Supply |
|---|---|
Use Scenario: Powers ARM-based SoC I/O domain or DDR termination in fanless industrial PCs operating in extended temperature environments. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1.8V at up to 2A with minimal thermal rise on dense PCBs. Use Value: 4μA quiescent current extends uptime in battery-backed systems; 2.2MHz switching enables compact 0.47μH inductor and small 22μF output capacitance. |
Use Scenario: Supplies image signal processor (ISP) core voltage in IP network cameras with motion-triggered wake/sleep cycles. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling >90% efficiency at 10mA standby and full 2A burst current during video capture. Use Value: Seamless PSM-to-PWM transition eliminates output voltage glitches during rapid load changes; PG signal synchronizes sensor wake-up. |
| Solid State Drive Controller Rail | Portable Electronics System Management |
Use Scenario: Generates 1.8V for NAND flash interface logic and SSD controller cores in M.2 and U.2 form factors. IC Role / Device Role / Timing Role: Low-noise, high-PSRR DC/DC converter minimizing digital switching noise coupling into sensitive flash timing paths. Use Value: 26mΩ/25mΩ MOSFETs reduce conduction loss; 100% duty cycle maintains regulation during 2.5V battery sag, preventing unexpected resets. |
Use Scenario: Powers microcontroller peripherals and wireless transceiver I/O in handheld test equipment and medical monitors. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator supporting long-duration battery operation with periodic high-current bursts. Use Value: Active output discharge ensures safe state during hot-swap events; thermal shutdown protects against enclosure overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6282518DMQT | Tape-and-reel packaging (3,000 units/reel) vs. cut-tape (250 units/reel); identical electrical specs and pinout. | Optimized for high-volume SMT production lines requiring reel-fed placement. | Select DMQT for automated assembly; DMQR for prototyping, low-volume builds, or evaluation. |
| TPS62825ADMQ | Adjustable output (0.6–4V) with forced-PWM operation - no PSM mode, higher 8mA IQ, same 2A rating and package. | Preferred where strict output ripple <10mV or fixed-frequency EMI compliance is required, e.g., RF front-end biasing. | Choose TPS62825ADMQ only when adjustable voltage and CCM operation outweigh 2000× higher quiescent current. |
Compared with TPS6282518DMQR, TPS6282518DMQT offers identical performance in volume packaging, while TPS62825ADMQ trades ultra-low IQ for forced-PWM stability - making the DMQR optimal for battery-sensitive, fixed-voltage applications demanding minimal standby loss.
Availability
TPS6282518DMQR is available at Aetrix Electronics and suitable for industrial PCs, analog security cameras, solid-state drives, and portable electronics requiring stable component supply with guaranteed long-term sourcing.
Supply support for TPS6282518DMQR 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 ICs, with decades of expertise in high-efficiency DC/DC conversion.
The TPS6282x family was designed for space-constrained, battery-powered, and thermally demanding applications - delivering ultra-low quiescent current, high power density, and robust protection in sub-2mm² packages.
FAQ
What is the output voltage tolerance of the TPS6282518DMQR over temperature?
The TPS6282518DMQR guarantees ±1% output voltage accuracy across the full –40°C to 125°C junction temperature range, meaning its 1.8V output stays within 1.782V to 1.818V under all operating conditions - verified per TI's SLVSEF9I datasheet Section 6.5.
Does the TPS6282518DMQR require external feedback resistors?
No. The TPS6282518DMQR has an internal 7.5MΩ resistor divider connecting FB to the 1.8V output, eliminating external resistors. The FB pin must be directly connected to the output node - confirmed in Section 5 (Pin Functions) and Section 8.2.2.2 of the datasheet.
What is the maximum continuous output current for the TPS6282518DMQR?
The TPS6282518DMQR supports 2A continuous output current, as specified in Table 4 (Device Options) and Section 6.3 (Recommended Operating Conditions) of the datasheet - validated under 2.4–5.5V input and proper PCB thermal design.
How does the TPS6282518DMQR handle short-circuit conditions?
The TPS6282518DMQR uses hiccup-mode short-circuit protection: upon detecting overcurrent for 32 switching cycles (~13μs), it disables the high-side FET for 100μs, then restarts with soft-start - limiting average power and preventing thermal damage per Section 7.3.5.
Can the TPS6282518DMQR operate with input voltage equal to output voltage?
Yes. The TPS6282518DMQR supports 100% duty cycle operation, allowing VIN as low as VOUT + IOUT×RDS(on) + IOUT×RL. At 2A load, minimum VIN ≈ 1.8V + 2A×26mΩ + 2A×20mΩ = ~1.9V - enabling operation near battery depletion per Section 7.3.3.
TPS6282518DMQR 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)
TPS6282518DMQR FAQ
1.How can I place an order for TPS6282518DMQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6282518DMQR 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 TPS6282518DMQR reliable?
The price and inventory of TPS6282518DMQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6282518DMQR is usually 5 days.
3.What payment methods are accepted for TPS6282518DMQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6282518DMQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6282518DMQR?
TPS6282518DMQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6282518DMQR 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 TPS6282518DMQR?
For technical support, including TPS6282518DMQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6282518DMQR requirements.
6.How does Aetrix verify that TPS6282518DMQR is sourced from the original manufacturer or authorized distributors?
All TPS6282518DMQR 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 TPS6282518DMQR meets industry standards.
7.What is the process for return or replacement of TPS6282518DMQR?
All TPS6282518DMQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS6282518DMQR, 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 TPS6282518DMQR part is unused and in its original packaging.
Return procedure for TPS6282518DMQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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