TPS54218 - 2A, 2MHz Sync Buck Converter | TI | Point-of-Load
MPN: TPS54218 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.15 | $215.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.6 | $1,600.00 |
Drop-in alternatives for TPS54218 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS54418
✅ Drop-In📋 Reference alternative (not in catalog)
TPS54318
✅ Drop-In📋 Reference alternative (not in catalog)
TPS54218 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Step-Down (Buck) |
| Input Voltage Range | 2.95 V to 6 V |
| Output Current | 2 A |
| Output Voltage | Adjustable, 0.803 V minimum |
| Voltage Reference | 0.8 V +/-1% over temperature |
| Switching Frequency | 200 kHz to 2 MHz (programmable) |
| High-Side / Low-Side MOSFET Rds(on) | 30 mOhm (typical), integrated |
| Control Method | Current Mode |
| Supply Current | 350 uA (typical operating) |
| Shutdown Supply Current | 2 uA (via EN pin) |
| Synchronization | External clock sync supported |
| Soft Start | Adjustable / sequencing via SS/TR |
| Power Good | UV and OV power-good output |
| Package | 16-WFQFN Exposed Pad (RTE), 3 mm x 3 mm |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
TPS54218 16-wfqfn exposed pad (rte), 3 mm x 3 mm Pin Configuration Guide
Complete pinout information for TPS54218 (16-wfqfn exposed pad (rte), 3 mm x 3 mm package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TPS54218.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS54218 is suitable for 6 applications: Point-of-Load for DSP and FPGA, 5V Distributed Power Systems, Networking and Communications Equipment, Industrial Automation Controls, Battery-Powered Portable Equipment, Test and Measurement Instruments.
Point-of-Load for DSP and FPGA
The TPS54218 fits point-of-load regulation for DSPs, FPGAs, and ASICs that run from 5V or 3.3V intermediate rails and need core voltages down to 0.803V at up to 2A. Its +/-1% 0.8V reference over temperature keeps tight core-voltage tolerance, while current-mode control delivers fast transient response to load steps. Up to 2-MHz switching permits low-profile inductors close to the processor. The UV/OV power-good output lets a supervisor sequence the rail with other supplies; the SS/TR pin supports controlled startup sequencing.
Recommended
5V Distributed Power Systems
In 5V intermediate-bus architectures, the TPS54218's 2.95V-6V input range covers 5V rails with margin. The integrated 30-mOhm MOSFETs maximize efficiency at 2A loads, reducing heat in dense boards, and the 350-uA operating supply current cuts standby draw. External clock synchronization lets multiple converters share a frequency or stagger phases to minimize input ripple. Its 3-mm x 3-mm WQFN footprint suits high-density backplane and shelf cards where board area and thermal budget are both constrained.
Recommended
Networking and Communications Equipment
Switch, router, and optical-module line cards require compact, efficient, low-noise PoL supplies. The TPS54218's external clock synchronization avoids beat-frequency noise between multiple converters on shared rails, improving EMI performance in communication systems. At 2-MHz operation the switching harmonics move above sensitive bands, simplifying filter design. The power-good flag supports fault reporting to the system controller, and the 2-uA shutdown mode via EN enables per-rail power management for energy-efficient operation.
Recommended
Industrial Automation Controls
Industrial controllers and I/O modules derive 3.3V/2.5V/1.8V logic rails from 5V supplies. The TPS54218 provides accurate +/-1% regulation over temperature for noise-sensitive analog and digital loads, with current-mode control easing compensation across varying loads. Its adjustable soft start limits inrush during system power-up, protecting upstream fuses and supplies. The thermally-enhanced exposed-pad WQFN package withstands elevated cabinet ambient temperatures when proper copper pours are applied on the PCB.
Recommended
Battery-Powered Portable Equipment
For single-cell Li-ion systems near end-of-discharge (approximately 3.0V-4.2V), the TPS54218's 2.95V minimum input extends usable battery voltage range. The 2-uA shutdown current via the EN pin preserves battery life in standby, while integrated 30-mOhm MOSFETs sustain efficiency at 2A burst loads such as wireless transmit or display refresh. Small 3-mm x 3-mm WQFN and up to 2-MHz operation shrink the power section for handheld and portable instrument form factors.
Recommended
Test and Measurement Instruments
Bench instruments and modular measurement cards need clean, accurate low-voltage rails for ADCs, clocking, and FPGAs. The TPS54218's +/-1% reference ensures rail accuracy, and its high 2-MHz capability moves switching noise away from sensitive signal bands; an optional post LDO can further cut ripple for analog sections. Power-good supervision supports self-test at boot, and adjustable soft start prevents rail overshoot that could stress sensitive converters and sensors during instrument turn-on.
Recommended
Recommended Products Summary
Engineering reference data for TPS54218 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS54418 | TPS54318 | MP2307 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Monolithic Power Systems (MPS) |
| Package | 16-WQFN (RTE) 3x3 mm exposed pad | WQFN-16 (RTE) - verify footprint | WQFN-16 (RTE) - verify footprint | SOIC-8 - different package |
| Input Voltage Range | 2.95 V to 6 V | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Output Current | 2 A | 4 A class (higher) | 3 A class (higher) | 3 A |
| Switching Frequency | 200 kHz to 2 MHz programmable | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Voltage Reference Accuracy | 0.8 V +/-1% over temperature | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| External Clock Sync | Yes | Yes (SWIFT family) | Yes (SWIFT family) | [DATA_NEEDED] |
| Drop-in Compatibility | - | Same family - verify pinout | Same family - verify pinout | No - PCB redesign required |
Key Differentiators
- Up to 2-MHz operation minimizes solution size (vs MP2307)
- +/-1% reference over temperature for accurate low-voltage cores (vs TPS54418)
- Low 2-uA shutdown current (vs TPS54318)
Design Notes
Place the input ceramic capacitor, output inductor, and BOOT capacitor as close as possible to the TPS54218 pins. Connect PGND and AGND at a single star point; use the exposed thermal pad as the main ground connection with a array of thermal vias to inner ground planes. TI datasheet layout guidelines (SLVSAXX series, TPS54218 datasheet section on application/layout) recommend minimizing the PH-node loop area to reduce radiated EMI.
At 2A output with a 5V input and 1.8V output, conduction losses are dominated by the integrated 30-mOhm MOSFETs. The thermally-enhanced 3x3 mm WQFN relies on PCB copper for heat spreading; provide at least 2 square inches of ground-plane copper or thermal vias to keep junction temperature within limits in elevated-ambient industrial environments.
A buck converter that shares a footprint is not automatically a drop-in replacement - as TI E2E forum discussions of TPS54218 replacements note, compensation, frequency setting, and pin functions can differ between family members. Verify pinout and re-tune the compensation network (COMP) when substituting. Do not omit the BOOT capacitor or set soft-start time shorter than needed for heavy load prebias.
Compliance Information
Compliance status not stated in the provided verified web data; consult TI product page quality/environmental data for TPS54218.
