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Texas Instruments TPS54218RTER
- Part No.:
- TPS54218RTER
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS54218RTER.pdf
- Description:
- IC REG BUCK ADJ 2A 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
TPS54218RTER from Texas Instruments is a 2.95-V to 6-V input, 2-A synchronous step-down DC/DC converter with integrated 30-mΩ high- and low-side MOSFETs, 2-MHz switching frequency capability, ±1% voltage reference accuracy over –40°C to 150°C, and power-good (PWRGD) monitoring for industrial power rails in factory automation and wireless infrastructure equipment.
For engineers reviewing the TPS54218RTER datasheet, TPS54218RTER pinout, TPS54218RTER application, or TPS54218RTER equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and efficiency behavior at 1 MHz/1.8 V output, and real-world alternative selection guidance - all grounded in TI's production-grade SLVS974F datasheet (May 2020 revision).
Technical Context
The TPS54218RTER implements peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across 0–100% duty cycle. Its RT/CLK pin supports both resistor-programmed frequency (200 kHz–2 MHz) and external clock synchronization via PLL lock-in (14 μs typical).
It integrates boot capacitor recharge logic, BOOT-PH UVLO (2.1 V min), and a transconductance error amplifier (225 μS typ) with soft-start-enabled gm reduction (70 μS during startup). The PWRGD comparator provides 93–107% VREF window with 2% hysteresis and open-drain output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.95 V to 6 V - supports single-cell Li-ion, 3.3 V/5 V rails, and USB PD-derived supplies without pre-regulation. |
| Output Current | 2 A continuous - enables compact point-of-load regulation for FPGA I/O, DSP cores, and ASIC auxiliary rails. |
| Switching Frequency | 200 kHz to 2 MHz - allows optimization of inductor size (e.g., 1.5 μH at 1 MHz) and EMI filtering trade-offs. |
| Voltage Reference | 0.803 V ±1% over –40°C to 150°C - ensures stable 1.2 V, 1.8 V, or 3.3 V output setpoints across automotive/industrial temperature ranges. |
| MOSFET RDS(on) | 30 mΩ (high-side) / 30 mΩ (low-side) typ at 5 V - delivers >90% efficiency at 2 A/1.8 V out with 5 V input and 1 MHz switching. |
| Quiescent Current | 350 μA typ (active), 2 μA max (shutdown) - extends battery life in always-on subsystems and enables fast wake-up response. |
| Thermal Resistance | RθJA = 37°C/W (JEDEC 4-layer board) - supports 2 A operation without forced air in 3×3 mm WQFN package. |
Pinout & Package
TPS54218RTER uses a thermally enhanced 3-mm × 3-mm, 16-pin WQFN package (RTE) with exposed PowerPad for PCB-level heat dissipation. Pin 1 is top-left corner (marked dot); PowerPad must be soldered to internal ground plane using ≥4 thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1, 2, 16) | Input power supply connection | Three parallel pins reduce trace inductance and IR drop; accepts 2.95–6 V with internal 2.6 V UVLO. |
| GND (3, 4) | Power ground return | Dual GND pins minimize ground bounce; must connect directly to PowerPad and system ground plane. |
| PH (10, 11, 12) | Switch node | High-frequency switching node connecting internal HS-FET source and LS-FET drain; requires tight layout to BOOT/VIN caps. |
| BOOT (13) | High-side gate driver supply | Requires 0.1 μF X7R/X5R ceramic cap to PH; UVLO disables HS-FET if BOOT–PH < 2.1 V. |
| VSENSE (6) | Feedback input | Inverting input of transconductance error amp; sets output via resistor divider to 0.803 V reference. |
| COMP (7) | Error amplifier output | Drives current-mode PWM comparator; connects external RC network for loop stability compensation. |
| EN (15) | Enable control | Pull <1.25 V to disable; internal 3.2 μA pullup enables default operation when floating; supports UVLO threshold adjustment. |
| SS (9) | Soft-start timing | Capacitor-connected pin controls output ramp time; discharged during fault recovery for repeatable startup. |
| RT/CLK (8) | Frequency programming | Configurable as resistor-to-GND (200–2000 kHz) or external clock input (300–2000 kHz) with PLL lock. |
| PWRGD (14) | Power-good status | Open-drain output asserts low if VOUT falls outside 93–107% of nominal; 100 Ω on-resistance enables direct MCU GPIO interface. |
| AGND (5) | Analog ground reference | Must tie to GND near device; separates noise-sensitive analog circuitry from high-current power ground paths. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 30-mΩ HS/LS switches eliminate external FETs and drivers, reducing BOM count and layout area by >30% vs discrete buck controllers. |
| Adjustable soft start | External capacitor on SS pin sets monotonic output ramp time - prevents inrush current damage to downstream capacitors and ICs. |
| Synchronization capability | RT/CLK pin accepts external clock (300–2000 kHz) with 14 μs PLL lock time - enables deterministic EMI reduction in multi-rail systems. |
| Pre-bias start-up | Safe start into precharged output avoids reverse current flow - critical for hot-swap and redundant power applications. |
| Comprehensive protection | Cycle-by-cycle current limit, thermal shutdown (175°C), frequency foldback, and UV/OV PWRGD reporting ensure robust field operation. |
Applications
| Factory Automation PLC I/O Module | Broadband Fixed-Line Access DSLAM |
|---|---|
|
Use Scenario: Regulating 1.8 V core supply for ARM-based controller and 3.3 V I/O rail for digital isolators and RS-485 transceivers in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 2 A at 1.8 V with precise sequencing and PWRGD confirmation before firmware initialization. Use Value: Integrated MOSFETs and 2-MHz capability enable <100 mm² solution size; ±1% VREF ensures reliable ADC reference and sensor interface accuracy over wide ambient range. |
Use Scenario: Generating 1.2 V and 2.5 V supplies for line card FPGAs and PHY ICs in carrier-class DSLAM chassis with strict thermal constraints. IC Role / Device Role / Timing Role: High-efficiency, thermally optimized point-of-load converter synchronized to system clock to suppress conducted EMI in dense backplane environments. Use Value: 37°C/W RθJA and 30-mΩ MOSFETs sustain 2 A output at 70°C ambient without derating; RT/CLK sync eliminates beat frequencies with adjacent converters. |
| Wireless Infrastructure Remote Radio Unit | Industrial Ethernet Switch PoE Controller |
|
Use Scenario: Providing 3.3 V bias for RF front-end LNAs and 1.2 V for baseband processors in outdoor small-cell RRUs operating from -40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-stable buck converter with 150°C max junction rating and 0.803 V ±1% reference for consistent RF performance across environmental extremes. Use Value: Guaranteed operation up to 150°C junction enables simplified thermal design; PWRGD signal validates rail integrity before enabling sensitive RF components. |
Use Scenario: Generating isolated 5 V and 12 V auxiliary rails from PoE midspan input for switch management MCU and fan controllers. IC Role / Device Role / Timing Role: Secondary buck stage converting intermediate 12 V bus to 5 V/2 A for embedded Linux SoC with soft-start coordination to avoid PoE classification faults. Use Value: Adjustable soft start (via SS pin) prevents inrush current spikes that could trigger PoE PSE disconnect; EN pin enables controlled power-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54228RTER | Higher 4-A output rating, same 2.95–6 V input, identical 3×3 mm WQFN package and pinout. | Targets higher-current loads (e.g., multi-core SoCs); requires larger inductor and output capacitance. | Select when future-proofing for >2 A peak loads or when sharing layout with 4-A variants across product families. |
| MP2315GJ-Z | Monolithic 2-A buck with 4.5–26 V input, 500 kHz fixed frequency, no RT/CLK sync, lower 0.8 V ref tolerance (±2%). | Designed for wider-input industrial rails; lacks PWRGD, soft-start adjustability, and thermal grade (–40°C to 125°C only). | Choose for cost-sensitive, non-synchronized 12 V–24 V input applications where extended temperature and precision are not required. |
Compared with TPS54218RTER, TPS54228RTER offers scalable current capacity in identical footprint and feature set, while MP2315GJ-Z trades precision, thermal robustness, and flexibility for broader input range and lower unit cost - making each suitable for distinct design priorities.
Availability
TPS54218RTER is available at Aetrix Electronics and suitable for factory automation PLCs, broadband DSLAM line cards, wireless infrastructure remote radio units, and industrial Ethernet switch power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54218RTER 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 TPS54218RTER belongs to TI's SWIFT™ synchronous buck converter family, engineered for space-constrained industrial and communications equipment demanding high efficiency, thermal resilience, and precise voltage regulation from low-input rails.
FAQ
What is the maximum supported switching frequency for TPS54218RTER?
The TPS54218RTER supports up to 2 MHz switching frequency when configured in resistor-timed (RT) mode using an appropriate RT resistor value. In external clock (CLK) mode, it accepts input frequencies from 300 kHz to 2 MHz with PLL lock-in. This high-frequency capability enables smaller magnetics and faster transient response in compact designs.
Does TPS54218RTER support power supply sequencing with other rails?
Yes, TPS54218RTER supports controlled sequencing via its SS (soft-start) pin and EN (enable) pin. An external capacitor on SS sets the output voltage ramp time, while EN allows external logic or supervisor ICs to coordinate startup order. The open-drain PWRGD output further enables daisy-chained sequencing by driving the EN pin of downstream converters.
Can TPS54218RTER operate with a pre-biased output voltage?
Yes, TPS54218RTER features safe start-up into prebiased outputs. Its control architecture prevents reverse current flow during startup by disabling the low-side MOSFET until the feedback loop engages, protecting downstream capacitors and ICs in hot-swap or redundant power configurations.
What thermal performance can be expected from TPS54218RTER in a standard 4-layer PCB?
On a JEDEC-standard 4-layer board (2 oz copper, 4 thermal vias under PowerPad), TPS54218RTER achieves RθJA = 37°C/W. At 2 A output and 5 V input, this allows continuous operation up to ~70°C ambient without derating - verified in TI's SLVS974F datasheet Figure 22 and thermal characterization data.
Is an external bootstrap diode required for TPS54218RTER?
No, TPS54218RTER integrates the bootstrap diode function internally. Only a 0.1 μF X7R/X5R ceramic capacitor between BOOT and PH pins is required. This integration reduces component count, improves reliability, and simplifies layout versus controllers requiring discrete bootstrap diodes.
TPS54218RTER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.95V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.803V
- Voltage - Output (Max):
- 4.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (3x3)
TPS54218RTER FAQ
1.How can I place an order for TPS54218RTER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54218RTER 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 TPS54218RTER reliable?
The price and inventory of TPS54218RTER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54218RTER is usually 5 days.
3.What payment methods are accepted for TPS54218RTER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54218RTER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54218RTER?
TPS54218RTER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54218RTER 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 TPS54218RTER?
For technical support, including TPS54218RTER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54218RTER requirements.
6.How does Aetrix verify that TPS54218RTER is sourced from the original manufacturer or authorized distributors?
All TPS54218RTER 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 TPS54218RTER meets industry standards.
7.What is the process for return or replacement of TPS54218RTER?
All TPS54218RTER units undergo pre-shipment inspection (PSI). If there is an issue with TPS54218RTER, 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 TPS54218RTER part is unused and in its original packaging.
Return procedure for TPS54218RTER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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