TPS54218RTER - 2A, 2MHz Sync Step-Down Buck | TI
部品番号: TPS54218RTER ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.39 | $0.39 |
| 10 | $0.37 | $3.70 |
| 100 | $0.34 | $34.00 |
| 500 | $0.31 | $155.00 |
| 1,000 | $0.29 | $290.00 |
TPS54218RTER 概要
A synchronous buck converter is a type of switching voltage regulator that steps a higher DC input voltage down to a lower regulated output voltage using two internal MOSFETs - a high-side control FET and a low-side synchronous rectifier - instead of an external Schottky diode. Within the power management hierarchy (DC-DC converter, switching regulator, power management IC), synchronous topologies improve efficiency at light and full load by eliminating diode conduction losses, which is why they dominate point-of-load designs in modern digital systems.
Key features include two integrated 30 mOhm (typical) MOSFETs delivering high efficiency at full 2A load, an externally synchronizable switching frequency from 200 kHz to 2 MHz for filter and footprint optimization, a precision 0.8V reference holding plus or minus 1 percent over temperature, and adjustable soft start with sequencing support. UV and OV power-good monitoring simplifies system supervision and fault reporting.
Architecturally, the TPS54218 belongs to TI's SWIFT family of point-of-load converters. The D-CAP-style adaptive on-time control approach delivers fast transient response with low output ripple while supporting ceramic output capacitors without complex compensation. The integrated FETs and compact 16-WQFN (RTE) exposed-pad package minimize the external component count and PCB area for space-constrained rails.
Typical applications include 5V or 3.3V point-of-load conversion for DSPs, FPGAs, and ASICs; DDR memory rail generation in networking and telecom equipment; and low-voltage rail powering in industrial and consumer systems where the narrow 2.95V to 6V input aligns with 3.3V and 5V intermediate bus rails.
When designing, select the inductor and output capacitor for the chosen switching frequency: at 2 MHz, smaller inductance values reduce solution size but increase ripple current, while operating near 200 kHz maximizes efficiency. Keep the PH and BOOT loops tight and use the exposed pad as the thermal ground.
This page synthesizes verified distributor pricing, drop-in alternative analysis, pinout guidance, and practical design notes not consolidated in the manufacturer datasheet.
ドロップイン代替品: TPS54218RTER — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TPS54218RTER （同一形状・フットプリント） — 相違点: Package, Topology, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
TPS54618QRLBRQ1
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS54426RSAR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS54218RTER 最大定格＆電気的特性
| トポロジー | Synchronous Step-Down (Buck) |
| 入力電圧範囲 | 2.95 V to 6 V |
| Output Voltage (Adjustable) | 0.803 V to 6 V (reference 0.8 V) |
| 最大出力電流 | 2 A |
| スイッチング周波数 | 200 kHz to 2 MHz |
| Voltage Reference Accuracy | 0.8 V +/-1% over temperature |
| ハイサイドMOSFETオン抵抗 | 30 mOhm (typical) |
| ローサイドMOSFETオン抵抗 | 30 mOhm (typical) |
| 出力数 | 1 |
| Synchronization | External clock synchronization supported |
| ソフトスタート | Adjustable soft start / sequencing |
| Power Good | UV and OV power-good monitoring |
| 動作温度範囲 | -40C to +150C (RTE) |
| パッケージ | 16-WFQFN (RTE) with exposed pad |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
TPS54218RTER 16-wfqfn (rte) with exposed pad ピン配置ガイド
TPS54218RTER (16-wfqfn (rte) with exposed pad パッケージ) のピン配置。 このパワーデバイスは、ゲート、ドレイン、ソース端子を備えています。非極性パッケージの場合、正確なピン1の向きとフットプリントの詳細については、メーカーのデータシートを参照してください。主な用途には、電源設計、モータ駆動、負荷スイッチングがあります。
詳細なピン配置データはありません: TPS54218RTER.
詳細は データシート をご参照ください。
主な用途
TPS54218RTER の用途: 6 件s: Point-of-Load Conversion for DSPs and FPGAs, DDR Memory Rail Generation, Networking and Telecom Equipment, Industrial Automation and Control, Battery-Powered Portable Systems, Test and Measurement Instrumentation.
Point-of-Load Conversion for DSPs and FPGAs
The TPS54218RTER fits point-of-load (POL) regulation for DSPs, FPGAs, and ASICs that are fed from a 3.3V or 5V intermediate bus. Its 0.8V reference held to plus or minus 1 percent over temperature meets the tight core-rail accuracy requirements of modern low-voltage silicon, while the 200 kHz to 2 MHz adjustable frequency lets designers run at 2 MHz to shrink the inductor below the footprint of dense processor clusters. The integrated 30 mOhm MOSFET pair sustains 2A continuous load with high efficiency, and the UV/OV power-good output gives the processor a rail-valid flag for sequencing and fault handling. Placed within millimeters of the load with tight PH and BOOT loops, it delivers fast transient response during core clock bursts without the ringback that external-diode designs often exhibit.
おすすめ
DDR Memory Rail Generation
Memory subsystems demand accurate, low-noise core and termination rails in a compact area, and the TPS54218RTER addresses both needs. The 0.8V plus or minus 1 percent voltage reference over temperature directly supports the accuracy windows of VDD rails for DDR3/DDR4-class devices, and the 2MHz capability permits small, low-profile inductors suitable for dense memory modules and mezzanine layouts. The adjustable soft-start controls inrush into large bulk capacitance banks common on memory boards, while the power-good signal lets the memory controller gate initialization until rails are valid. Efficiency at 2A from the integrated synchronous FETs limits local heating in enclosed memory compartments. Use a low-ESR ceramic output capacitor network to keep output ripple within the load's specification during burst read/write traffic.
おすすめ
Networking and Telecom Equipment
Line cards, switches, and small-cell radio units in networking and telecom equipment are built from 3.3V and 5V intermediate buses, exactly the 2.95V-6V window the TPS54218RTER is designed around. External clock synchronization allows hundreds of converters on a board to be locked to a single system clock, suppressing beat-frequency noise that can couple into high-speed SERDES and PHY rails. The 2A output covers PHY, microcontroller, and ASIC rails, and the wide frequency range lets designers tune each rail: high frequency for footprint-critical PHY supplies, low frequency for efficiency-critical always-on rails. Adjustable sequencing coordinates multi-rail power-up of processors and optics, improving field reliability in 24/7 telecom infrastructure.
おすすめ
Industrial Automation and Control
Industrial controllers, drives, and I/O modules frequently derive low-voltage logic rails from a 5V rail, and the TPS54218RTER provides a compact, efficient 2A step-down for this purpose. The -40C to +150C RTE package rating supports harsh cabinet environments, and the UV/OV power-good supervision provides early warning of brownout conditions on the factory floor. Synchronization to an external clock prevents low-frequency beat interference with sensitive analog front-ends such as current-sense amplifiers used in motor control. The adjustable soft-start supports graceful restart after fault clearing. Because the converter integrates both MOSFETs and operates from a fixed 5V bus, the external solution consists of just an inductor and a few ceramic capacitors, simplifying BOM management for high-volume industrial builds.
おすすめ
Battery-Powered Portable Systems
Single-cell lithium-ion systems regulated to about 3.3V-4.2V sit squarely inside the 2.95V-6V input range of the TPS54218RTER, making it a strong point-of-load choice for portable instruments, handheld testers, and battery-backed IoT gateways. Operating at 2 MHz keeps switching artifacts above sensitive signal bands and allows sub-millimeter-height inductors for thin enclosures. The synchronous topology's integrated 30 mOhm MOSFETs preserve battery runtime compared with external-diode buck designs, particularly at partial loads typical of duty-cycled radios. The enable and soft-start/sequencing pins support power-gating of subsystems to extend sleep time, while the power-good flag allows the host MCU to log rail health before shutdown during deep discharge events.
おすすめ
Test and Measurement Instrumentation
Bench and portable instruments need clean, accurate internal rails so that measurement accuracy is not corrupted by supply noise. The TPS54218RTER's 0.8V plus or minus 1 percent reference over temperature maintains rail accuracy across warm-up and environmental drift, while 2MHz operation places switching ripple far above the passband of low-speed analog sections, easing downstream LC filtering. External clock synchronization ties converter switching to the instrument's master clock, converting spurs into predictable, calibratable tones. The 2A output comfortably powers ADC, FPGA, and interface rails, and the power-good output supports the instrument's self-test diagnostics. Compact 16-WQFN (RTE) layout fits the crowded boards typical of handheld scopes and data loggers.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TPS54218RTER — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TPS54618QRLBRQ1 | TPS54426RSAR |
|---|---|---|---|
| Package | 16-WFQFN (RTE) exposed pad | 16-pin QFN | 16-pin QFN class |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 2 A | 2 A | 4 A class |
| Reference in retrieved web data | ETEI comparison, IC-Components cross-ref list | Avaq comparison page | ETEI comparison page |
主な差別化要因
- Up to 2 MHz operation with external clock sync （vs TPS54426RSAR)
- Automotive-qualified family option （vs TPS54618QRLBRQ1)
- Integrated dual 30 mOhm MOSFETs at 2A （vs TPS54120 / TPS54320 / TPS54620)
設計ノート
Place the input capacitor, output capacitor, and inductor within a few millimeters of the RTE package. Keep the PH-to-inductor loop as short and wide as possible to minimize the high-frequency switching loop area, and route the BOOT capacitor directly from BOOT to PH. Solder the exposed pad to a solid ground pour with an array of thermal vias - the exposed pad is both the thermal path for 2A operation and the main grounding point for the device.
Choose the switching frequency based on the rail's priorities. At 2 MHz, a roughly 1 uH inductor keeps ripple manageable with very small solution size, but switching losses rise; near 200 kHz, a larger inductance (around 4.7 uH) improves efficiency for thermally constrained or battery-powered designs. Use low-ESR X5R/X7R ceramic output capacitors, which the device's control topology supports without elaborate compensation. Estimated: ripple current scales inversely with frequency and inductance, so halving the frequency roughly doubles required inductance for equal ripple.
Do not exceed the 6V maximum input - the TPS54218 is a narrow-input POL part, not a 12V-input converter; upstream transients on 5V rails can exceed 6V, so verify surge conditions or add input protection. Never leave SS/TR floating if a defined startup ramp is required, and route the RT/CLK pin per datasheet guidance when synchronizing to an external clock, since a poorly terminated sync line can cause frequency jitter and subharmonic behavior.
コンプライアンス情報
RoHS compliant per distributor listings (DigiKey/Mouser) for the 16-WQFN (RTE) package. Commercial-grade part; use TPS54618QRLBRQ1 for AEC-Q100 automotive requirements. Obtain formal REACH and conflict-minerals declarations from TI's product page.
