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Texas Instruments TPS6282618DMQR
- Part No.:
- TPS6282618DMQR
- Manufacturer:
- Texas Instruments
- Package:
- 6-VFDFN
- Datasheet:
-
TPS6282618DMQR.pdf
- Description:
- IC REG BUCK 1.8V 3A 6VSON
- Quantity:
- Payment:
- Shipping:
Inventory:22,405
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Product details
Overview
TPS6282618DMQR from Texas Instruments is a 3A 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 industrial and portable electronics.
For engineers reviewing the TPS6282618DMQR datasheet, TPS6282618DMQR pinout, TPS6282618DMQR application, or TPS6282618DMQR equivalent, key selection criteria include its 1.8V fixed output, 3A continuous current capability, 1.5mm × 1.5mm VSON-HR (DMQ) package, power-good signaling, active output discharge, and compatibility with low-ESR ceramic output capacitors (e.g., 2×10µF).
Technical Context
The TPS6282618DMQR implements adaptive constant-on-time DCS-Control for fast transient response and stable 2.2MHz operation across input voltages (2.4V–5.5V). Its internal 7.5MΩ feedback divider fixes VOUT at 1.8V, eliminating external resistor networks while maintaining ±1% regulation accuracy over temperature and load.
It operates in automatic PSM/PWM mode transition: PWM for medium-to-heavy loads (CCM), PSM for light loads to sustain >90% efficiency down to µA-level currents. Protection includes hiccup-mode short-circuit response, thermal shutdown (150°C trip), UVLO (2.2V threshold), and 100% duty-cycle operation for ultra-low dropout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (–40°C to 125°C), enabling direct replacement of adjustable variants without resistor recalculations. |
| Max Output Current | 3A continuous - supports FPGA core rails, SoC I/O supplies, and multi-core MCU domains without external current sharing. |
| Input Voltage Range | 2.4V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB PD (5V), and industrial 3.3V/5V rails. |
| Quiescent Current | 4μA in PSM - extends battery runtime in always-on sensor nodes and low-power IoT endpoints. |
| Switching Frequency | 2.2MHz nominal - allows use of compact 0.47µH inductors and minimizes EMI filtering footprint. |
| Efficiency Peak | Up to 97% at 3A/1.8V - reduces thermal load in sealed enclosures and enables fanless industrial PC designs. |
| Thermal Shutdown | 150°C with 20°C hysteresis - provides robust protection during sustained overload or poor PCB heatsinking. |
Pinout & Package
TPS6282618DMQR uses a 6-pin 1.5mm × 1.5mm VSON-HR (DMQ) package with wettable flanks for automated optical inspection. Thermal pad exposed on bottom enhances PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic; requires ≥1.0V to start regulation; <0.4V disables device and activates output discharge. |
| PG (Pin 2) | Power-good open-drain | Sinks up to 1mA; asserts high-impedance when VOUT reaches 96–107% of 1.8V; used for rail sequencing. |
| FB (Pin 3) | Feedback input | Internally connected to 7.5MΩ divider; must be tied directly to VOUT for fixed-output operation. |
| GND (Pin 4) | Ground reference | Primary return path for control circuitry and power stage; connects to thermal pad for thermal performance. |
| SW (Pin 5) | Switch node | Drives external 0.47µH inductor; carries high di/dt; requires tight layout to minimize EMI and voltage spikes. |
| VIN (Pin 6) | Input supply | Accepts 2.4–5.5V; requires local 4.7µF ceramic capacitor placed within 3mm of pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers <10µs load transient response with minimal output capacitance - critical for burst-mode processors. |
| Active output discharge | 75–400mA sink via SW pin during disable - prevents floating outputs and ensures safe power-down sequencing. |
| 100% duty-cycle mode | Maintains regulation when VIN drops within ~150mV of VOUT - supports brownout tolerance in battery-powered systems. |
| Hiccup short-circuit protection | Limiting fault current to <5A while cycling soft-start every ~100µs - protects MOSFETs and preserves board reliability. |
| Power-good (PG) signal | Configurable window comparator (90–94% low / 103–107% high) with 100µs blanking - enables precise multi-rail startup coordination. |
Applications
| Solid State Drive (SSD) Power Rail | Industrial PC Core Supply |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM buffer in M.2 NVMe SSDs with dynamic 0–3A load steps. IC Role / Device Role / Timing Role: Primary 1.8V core regulator delivering fast transient response and low-noise output for high-speed data integrity. Use Value: 1% output accuracy and 2.2MHz switching enable compact 0.47µH + 2×10µF filter design, reducing BOM count by 3 components vs. legacy solutions. | Use Scenario: Supplies 1.8V I/O domain for Intel Atom or AMD Embedded G-Series SoCs in fanless panel PCs. IC Role / Device Role / Timing Role: Point-of-load converter with PG signaling to coordinate with 5V/3.3V rails during cold boot and sleep/wake transitions. Use Value: 4μA quiescent current extends standby time; active discharge prevents latch-up during hot-swap PCIe module insertion. |
| Analog Security Camera Sensor Bias | Portable Electronics System-on-Chip (SoC) |
Use Scenario: Provides clean 1.8V bias to CMOS image sensor and ISP in IP cameras operating at –30°C to 70°C ambient. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator supporting extended temperature range without derating. Use Value: 1% accuracy over –40°C to 125°C junction ensures consistent ADC reference and analog front-end performance across environmental extremes. | Use Scenario: Powers application processor cores in handheld medical devices and ruggedized tablets with Li-ion battery input. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from 3.0–4.2V battery, dynamically scaling output current from µA to 3A. Use Value: PSM-to-PWM seamless transition maintains <20mV ripple across full load range - avoids digital noise coupling into sensitive RF/analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62826DMQ | Adjustable output (0.6–4.0V); requires external R1/R2 divider; same 3A rating, package, and DCS-Control architecture. | Used where multiple output voltages are needed on same PCB or future voltage flexibility is required. | Select TPS62826DMQ only if adjustable VOUT is necessary; TPS6282618DMQR saves BOM cost and layout area with fixed 1.8V. |
| TPS6282518DMQ | 2A rated (vs. 3A); identical 1.8V fixed output, DMQ package, and electrical specs except current limit and RDS(on). | Suitable for lower-current peripherals like camera modules or interface ICs where 3A headroom is unnecessary. | Choose TPS6282518DMQ for cost-sensitive 1.8V/2A applications; TPS6282618DMQR provides margin for peak SoC loads and thermal headroom. |
Compared with TPS62826DMQ and TPS6282518DMQ, the TPS6282618DMQR uniquely combines 3A capability, fixed 1.8V output, and 1.5mm × 1.5mm footprint - making it optimal for space-constrained, high-current 1.8V rails where simplicity and thermal performance are prioritized.
Availability
TPS6282618DMQR is available at Aetrix Electronics and suitable for solid-state drives, industrial PCs, analog security cameras, and portable electronics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS6282618DMQR 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The TPS6282x product line was engineered for ultra-small, high-efficiency point-of-load conversion in battery-powered and thermally constrained systems - emphasizing low IQ, fast transient response, and minimal external component count.
FAQ
What is the output voltage tolerance of the TPS6282618DMQR over temperature and load?
The TPS6282618DMQR delivers 1.8V output with ±1% accuracy across the full junction temperature range of –40°C to 125°C and under all load conditions from 0A to 3A. This specification is guaranteed by TI's internal 7.5MΩ precision feedback divider and trimmed bandgap reference, eliminating external resistor drift concerns.
Does the TPS6282618DMQR require external feedback resistors?
No, the TPS6282618DMQR does not require external feedback resistors. It integrates a precision 7.5MΩ internal resistor divider that fixes the output at 1.8V. The FB pin must be connected directly to the output node; R1, R2, and feedforward capacitor C3 are omitted in this configuration.
What is the recommended inductor value and type for the TPS6282618DMQR?
Texas Instruments recommends a 0.47µH shielded power inductor with ≥4.8A saturation current and ≤32mΩ DC resistance - such as Coilcraft XFL4015-471ME or Murata DFE201610E-R47M. This value supports 2.2MHz operation, 3A load, and optimal efficiency across the 2.4–5.5V input range.
How does the power-good (PG) signal behave during startup and fault conditions?
The PG pin of the TPS6282618DMQR is an open-drain output that remains low during EN assertion until VOUT reaches 96% of 1.8V, then transitions to high-impedance after a 100µs blanking delay. It pulls low again during UVLO, thermal shutdown, or EN deactivation - providing reliable sequencing and fault indication without external logic.
Can the TPS6282618DMQR operate with input voltage close to its 1.8V output?
Yes, the TPS6282618DMQR supports 100% duty-cycle operation, allowing it to maintain regulation when VIN drops as low as ~1.95V (1.8V + IOUT × RDS(on) + IOUT × LDCR). This enables graceful operation during battery brownout or upstream supply sag without rail collapse.
TPS6282618DMQR 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:
- 3A
- 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)
TPS6282618DMQR FAQ
1.How can I place an order for TPS6282618DMQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6282618DMQR 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 TPS6282618DMQR reliable?
The price and inventory of TPS6282618DMQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6282618DMQR is usually 5 days.
3.What payment methods are accepted for TPS6282618DMQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6282618DMQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6282618DMQR?
TPS6282618DMQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6282618DMQR 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 TPS6282618DMQR?
For technical support, including TPS6282618DMQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6282618DMQR requirements.
6.How does Aetrix verify that TPS6282618DMQR is sourced from the original manufacturer or authorized distributors?
All TPS6282618DMQR 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 TPS6282618DMQR meets industry standards.
7.What is the process for return or replacement of TPS6282618DMQR?
All TPS6282618DMQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS6282618DMQR, 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 TPS6282618DMQR part is unused and in its original packaging.
Return procedure for TPS6282618DMQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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