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Texas Instruments TPS6282618DMQT
- Part No.:
- TPS6282618DMQT
- Manufacturer:
- Texas Instruments
- Package:
- 6-VFDFN
- Datasheet:
-
TPS6282618DMQT.pdf
- Description:
- IC REG BUCK 1.8V 3A 6VSON
- Quantity:
- Payment:
- Shipping:
Inventory:15,377
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Product details
Overview
TPS6282618DMQT from Texas Instruments is a 3A synchronous step-down DC/DC converter in a 1.5mm × 1.5mm VSON-HR (DMQ) package, delivering fixed 1.8V output with ±1% accuracy over –40°C to 125°C, 2.4V–5.5V input range, and 2.2MHz switching frequency. It integrates 26mΩ/25mΩ MOSFETs, supports power-save mode for ultra-low 4μA quiescent current, and features active output discharge, power-good signal, and hiccup short-circuit protection - deployed in SSDs and industrial PCs requiring compact, high-efficiency point-of-load regulation.
For engineers reviewing the TPS6282618DMQT datasheet, TPS6282618DMQT pinout, TPS6282618DMQT application, or TPS6282618DMQT equivalent, key selection criteria include verified 1.8V fixed-output accuracy, confirmed 3A continuous output capability, validated DCS-Control transient response, and compatibility with 0.47µH inductors and minimal 2×10µF output capacitance per TI's typical design.
Technical Context
The TPS6282618DMQT implements DCS-Control topology with adaptive constant-on-time modulation, enabling seamless PWM-to-PSM mode transition without output voltage disturbance. Its internal 0.6V reference and precision resistor divider yield 1.8V output via direct FB-to-VOUT connection, eliminating external feedback components.
It operates in forced-PWM only when specified as "A" variant (e.g., TPS6282618ADMQ); the non-A TPS6282618DMQT uses automatic PSM at light loads and enters 100% duty cycle for low-dropout operation. Thermal shutdown triggers at 150°C with 20°C hysteresis, and UVLO activates below 2.2V with 160mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% over –40°C to 125°C junction temperature - enables stable core logic supply without external resistors. |
| Max Output Current | 3A continuous - supports FPGA I/O banks, ARM Cortex-A cores, and multi-lane PCIe endpoint 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 - extends battery runtime in always-on security cameras and portable medical sensors. |
| Switching Frequency | 2.2MHz nominal - allows use of sub-1µH inductors and reduces EMI filtering footprint. |
| Efficiency Peak | Up to 97% at 1.8V/2A - minimizes thermal load in space-constrained industrial PC modules. |
| Thermal Protection | 150°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor airflow. |
Pinout & Package
TPS6282618DMQT is housed in a thermally enhanced 6-pin VSON-HR (DMQ) package measuring 1.5mm × 1.5mm with 0.5mm pitch and wettable flank terminals for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic control; requires ≥1.0V to enable, ≤0.4V to disable; must not float - used for power sequencing with PG of upstream rails. |
| PG (Pin 2) | Power-good open-drain output | Signals valid regulation (94–98% of 1.8V) with 100µs rise deglitch; sinks up to 1mA - drives EN of downstream converters or microcontroller reset lines. |
| FB (Pin 3) | Feedback input | Internally connected to fixed 1.8V divider; must be shorted directly to VOUT - eliminates external resistor network and layout sensitivity. |
| GND (Pin 4) | Power ground | Primary return path for high-frequency switch currents; requires low-inductance connection to thermal pad - critical for EMI suppression and thermal performance. |
| SW (Pin 5) | Switch node | Drives external 0.47µH inductor; carries high di/dt square wave - demands tight loop area with input/output capacitors to limit radiated emissions. |
| VIN (Pin 6) | Input voltage supply | Accepts 2.4–5.5V; requires local 4.7µF ceramic capacitor placed within 3mm - ensures low-impedance source for peak switch current. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Delivers <5µs load transient response with <±15mV deviation at 1.8V/3A - maintains SoC core stability during burst-mode processing. |
| 1% output voltage accuracy | Guarantees 1.782V–1.818V across full temperature and line/load range - meets tight tolerance requirements of DDR4/DDR5 memory termination. |
| Active output discharge | Provides 75–400mA sink via SW pin during disable - prevents floating outputs and ensures controlled power-down in hot-swap systems. |
| Hiccup short-circuit protection | Limiting fault energy by cycling 100µs off-time after 32-cycle overcurrent detection - protects PCB traces and input capacitors during sustained shorts. |
| 100% duty cycle operation | Enables dropout as low as IOUT×RDS(on) + IOUT×RL - sustains regulation when VIN drops to ~1.95V at 3A, extending usable battery range. |
Applications
| Solid State Drive (SSD) Power Rail | Industrial PC Core Logic Supply |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM cache in M.2 NVMe SSDs with bursty 2–3A load profiles and strict thermal envelope. IC Role / Device Role / Timing Role: Primary 1.8V point-of-load regulator delivering fast transient response and low-noise output for high-speed SerDes interfaces. Use Value: 2.2MHz switching avoids audible noise while 4μA quiescent current extends sleep-mode battery life in portable SSD enclosures. | Use Scenario: Supplies 1.8V to FPGA configuration banks and PCIe Gen4 PHYs in fanless industrial PCs operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC converter with integrated MOSFETs and 1.5mm × 1.5mm footprint - fits dense CPU/FPGA carrier boards. Use Value: 97% peak efficiency and 129.5°C/W RθJA minimize heatsink requirements, reducing system BOM cost and height. |
| Analog Security Camera Sensor Bias | Portable Medical Diagnostic Module |
Use Scenario: Provides clean, low-noise 1.8V bias to CMOS image sensor analog front-end in IP cameras powered by PoE+ (57V converted down). IC Role / Device Role / Timing Role: Secondary regulated rail following primary 12V/5V conversion; rejects ripple from upstream flyback stages via DCS-Control loop bandwidth. Use Value: Active output discharge ensures rapid sensor power-down during motion-triggered wake/sleep cycles, meeting UL 62368-1 safe-state requirements. | Use Scenario: Powers low-power microcontroller and ADC subsystem in handheld ultrasound or glucose monitor with coin-cell or rechargeable Li-ion backup. IC Role / Device Role / Timing Role: Ultra-low-IQ buck converter maintaining regulation during deep-sleep intervals between sensor readings. Use Value: 4μA quiescent current enables >1-year shelf life on CR2032; 1.5mm × 1.5mm DMQ package fits sub-20mm² PCB real estate constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6282618ADMQ | Forced-PWM mode only; no PSM; higher 8mA quiescent current; identical 1.8V/3A specs and pinout. | Preferred where output ripple <10mV is mandatory (e.g., RF transceiver LDO input), not where battery life dominates. | Select TPS6282618ADMQ only if fixed-frequency operation and lowest possible ripple outweigh quiescent current penalty. |
| TPS6282518DMQT | 2A max output (vs. 3A); same 1.8V/1% accuracy, 2.2MHz, DMQ package, and feature set. | Suitable for lower-current applications like camera ISP cores or MCU peripherals where 3A headroom is unnecessary. | Choose TPS6282518DMQT when load never exceeds 2A - offers identical layout compatibility with reduced thermal margin. |
Compared with TPS6282618ADMQ, the TPS6282618DMQT trades higher light-load efficiency for greater ripple; versus TPS6282518DMQT, it delivers 50% more current in identical footprint - making it optimal for 3A 1.8V rails where size and battery life are co-prioritized.
Availability
TPS6282618DMQT is available at Aetrix Electronics and suitable for solid state drives, industrial PCs, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS6282618DMQT 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-reliability DC/DC conversion.
The TPS6282x product line targets space-constrained, battery-sensitive applications demanding ultra-low quiescent current, high power density, and precise output regulation - exemplified by the TPS6282618DMQT's 1.5mm × 1.5mm footprint and 1% accuracy.
FAQ
What is the output voltage tolerance of the TPS6282618DMQT across temperature and load?
The TPS6282618DMQT guarantees ±1% output voltage accuracy over the full junction temperature range of –40°C to 125°C and across its entire 0–3A load range. Measured data shows 1.78V to 1.82V at 1.8V nominal under worst-case conditions, meeting tight tolerance requirements for DDR memory termination and FPGA I/O banks without external trimming.
Does the TPS6282618DMQT require external feedback resistors?
No, the TPS6282618DMQT does not require external feedback resistors. As a fixed 1.8V output variant, it integrates an internal resistor divider connected to the FB pin; the FB pin must be directly shorted to the output voltage node per TI's recommended layout - eliminating component count, placement error risk, and resistor tolerance drift.
What is the minimum input voltage required for the TPS6282618DMQT to maintain regulation at full 3A load?
At 3A output, the TPS6282618DMQT enters 100% duty cycle mode when input voltage approaches VOUT + IOUT × RDS(on) + IOUT × RL. With 26mΩ high-side RDS(on) and a typical 15mΩ inductor DCR, minimum VIN is approximately 1.8V + (3A × 0.026Ω) + (3A × 0.015Ω) = 1.923V - enabling operation down to ~1.95V in practical designs with margin.
How does the power-good (PG) signal behave during startup and fault conditions for the TPS6282618DMQT?
The TPS6282618DMQT's PG pin is an open-drain output that remains low during startup until VOUT reaches 94–98% of 1.8V (1.692–1.764V), then transitions high after a 100µs deglitch delay. It asserts low during EN disable, UVLO (VIN < 2.2V), thermal shutdown (>150°C), or output undervoltage - enabling reliable power sequencing and system-level fault detection.
Can the TPS6282618DMQT be used in forced-PWM mode?
No, the TPS6282618DMQT operates exclusively in automatic PSM/PWM mode. Forced-PWM functionality is only available in the "A" variant family (e.g., TPS6282618ADMQ). The TPS6282618DMQT automatically enters power-save mode below ~300mA to maintain high light-load efficiency, making it unsuitable for applications requiring strictly fixed-frequency operation.
TPS6282618DMQT 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)
TPS6282618DMQT FAQ
1.How can I place an order for TPS6282618DMQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6282618DMQT 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 TPS6282618DMQT reliable?
The price and inventory of TPS6282618DMQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6282618DMQT is usually 5 days.
3.What payment methods are accepted for TPS6282618DMQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6282618DMQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6282618DMQT?
TPS6282618DMQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6282618DMQT 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 TPS6282618DMQT?
For technical support, including TPS6282618DMQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6282618DMQT requirements.
6.How does Aetrix verify that TPS6282618DMQT is sourced from the original manufacturer or authorized distributors?
All TPS6282618DMQT 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 TPS6282618DMQT meets industry standards.
7.What is the process for return or replacement of TPS6282618DMQT?
All TPS6282618DMQT units undergo pre-shipment inspection (PSI). If there is an issue with TPS6282618DMQT, 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 TPS6282618DMQT part is unused and in its original packaging.
Return procedure for TPS6282618DMQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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