TPS2054BDR - Quad 500mA Current-Limited Power Switch | Texas Instruments
部品番号: TPS2054BDR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.28 | $2.28 |
| 10 | $2.04 | $20.40 |
| 100 | $1.64 | $164.00 |
| 500 | $1.35 | $675.00 |
| 1,000 | $1.12 | $1,120.00 |
TPS2054BDR 概要
A power-distribution switch, also called a load switch or USB power switch, is a power management IC that sits between a supply rail and one or more loads, turning power on and off under logic control while protecting the supply from faults. Within the power-management hierarchy, load switches rank under PMICs alongside hot-swap controllers and e-fuses, and are essential wherever multiple downstream ports share one upstream supply.
Key features of the TPS2054B include the precise 70 mOhm on-resistance that minimizes voltage drop at full 500 mA load, an accurate internal current limit specified between 0.75 A minimum and 1.25 A maximum, and integrated thermal and short-circuit protection that shuts the channel down during fault events. A 0.6 ms typical output rise time limits inrush current, undervoltage lockout (UVLO) prevents operation at marginal inputs, and a deglitched overcurrent (OC) fault flag reports faults to the host without chatter.
Architecturally, each channel uses an N-channel MOSFET driven by an internal charge pump, with a bandgap-based current-limit threshold. When the load exceeds the limit or the die overheats, the device reduces or removes gate drive and asserts the open-drain OC output after a deglitch period, preventing nuisance trips during transient connector events.
Typical applications include USB host and hub port power switching, hot-plug power distribution in set-top boxes and monitors, and multi-port peripheral protection in industrial and consumer systems. The quad configuration lets one 5 V rail feed four independently switched ports.
Design consideration: total on-chip dissipation is I-squared-R per channel, so at 500 mA per channel the 70 mOhm switch dissipates only about 17.5 mW per channel, but PCB copper around the SOIC-16 still sets the junction temperature.
This page adds value beyond the datasheet by synthesizing distributor pricing tiers, drop-in alternatives including the ST2054BDR cross-brand equivalent, and practical design notes in one place. Pricing shown is as of 2026-09-03.
ドロップイン代替品: TPS2054BDR — 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: TPS2054BDR （同一形状・フットプリント） — 相違点: Package, Fault Reporting, On-Resistance, Switch Type, Topology.
クイック比較ツール — 並列比較する代替部品を選択:
TPS2054ADR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.72 / 個
データシートを見る →TPS2054D
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS2044BDR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ST2054BDR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS2054BDR-Q1
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS2054BDR 最大定格＆電気的特性
| トポロジー | Quad-channel high-side power-distribution switch (1:1) |
| Switch Type | N-Channel MOSFET (high-side) |
| Number of Channels | 4 |
| On-Resistance (RDS(on)) | 70 mOhm |
| Continuous Output Current | 500 mA per channel |
| 入力電圧範囲 | 2.7 V to 5.5 V |
| Current Limit (Minimum) | 0.75 A |
| Current Limit (Maximum) | 1.25 A |
| Output Rise Time | 0.6 ms (typical) |
| Protection Features | Thermal shutdown, short-circuit protection, undervoltage lockout |
| Fault Reporting | Deglitched overcurrent (OC) flag |
| Enable Input | Yes (active-high EN) |
| パッケージ | SOIC-16 (D) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Lead Free / RoHS compliant per distributor listing |
| Packaging | Tape and Reel (R suffix) |
TPS2054BDR soic-16 (d) ピン配置ガイド
TPS2054BDR (soic-16 (d) 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: TPS2054BDR.
詳細は データシート をご参照ください。
主な用途
TPS2054BDR の用途: 6 件s: USB Hub Port Power Switching, Multi-Port Host and Set-Top Box Power Distribution, Industrial Peripheral and Sensor Rail Gating, Battery-Powered and Portable Device Power Gating, Networking and Router Peripheral Ports, Test and Measurement Instrument Accessory Power.
USB Hub Port Power Switching
The TPS2054BDR is a natural fit for USB hub downstream-port power control because TI positions the TPS2054B family explicitly as a 4-channel, 0.5 A USB power switch. Each of the four channels independently gates the VBUS pin of one downstream port from the shared 5 V input, while the 70 mOhm on-resistance keeps the voltage drop to roughly 35 mV at a full 500 mA USB 2.0 unit load, preserving compliance with the USB VBUS droop budget. The 0.6 ms typical rise time soft-starts each port, limiting inrush when a device is hot-plugged so the upstream supply does not sag or trip the current limit on every connection event. If a plugged-in device faults and draws more than the 0.75 A to 1.25 A limit window, the affected channel current-limits and the deglitched OC flag notifies the hub controller, which can then report a port fault upstream without disturbing the other three ports. Integrated thermal shutdown and undervoltage lockout complete the fault containment. Paired with a USB hub controller and ESD protection on the data lines, one TPS2054BDR replaces four discrete load switches, cutting BOM count and board area in a standard 4-port hub design.
おすすめ
Multi-Port Host and Set-Top Box Power Distribution
Set-top boxes, monitors, and TV host platforms often expose two or more USB ports plus auxiliary 5 V accessory outputs from a single internal supply. The TPS2054BDR's four independently switched 500 mA channels let the system MCU power-gate each port via the active-high enable, so an unused port draws only the switch leakage instead of a live rail, improving standby power. The 2.7 V to 5.5 V input range tolerates realistic 5 V rail sag during peak load, and undervoltage lockout keeps outputs cleanly off during supply brownout so downstream devices never see partial power. Hot-plug robustness is handled by the 0.6 ms soft-start ramp, which absorbs the surge of a freshly connected bus-powered device. When a shorted cable or failed accessory is attached, the per-channel current limit between 0.75 A and 1.25 A confines the fault current, and the deglitched OC output gives the MCU a clean interrupt to display a user-facing error. Because all four channels share one SOIC-16 footprint with a 70 mOhm switch, thermal design is trivial: estimated total dissipation at full load is only about 70 mW, requiring no heatsink in a typical enclosed set-top chassis.
おすすめ
Industrial Peripheral and Sensor Rail Gating
In industrial control panels and automation nodes, multiple sensors, encoders, and field peripherals frequently share a 5 V auxiliary rail, and serviceability demands that a shorted peripheral not drag down the whole system. The TPS2054BDR provides four protected branch circuits from one SOIC-16: each 70 mOhm high-side switch feeds one peripheral group, and the accurate 0.75 A to 1.25 A current limit isolates fault current per branch while the PLC or microcontroller reads the deglitched OC flag to identify and log which branch failed. The 2.7 V to 5.5 V operating range suits both 3.3 V and 5 V logic worlds, and undervoltage lockout ensures clean power-up sequencing when the panel supply ramps. Because each channel switches only 500 mA across 70 mOhm, per-channel dissipation is about 17.5 mW (estimated from I2R), so the device runs cool inside sealed enclosures without airflow. The active-high enable allows the controller to power-cycle a hung peripheral remotely, a common technique for unattended equipment. Compared with discrete PTC fuses plus relays, the TPS2054BDR adds logic-controlled switching, fast electronic fault clearing, and telemetry in one IC.
おすすめ
Battery-Powered and Portable Device Power Gating
Portable instruments, handheld scanners, and battery accessories benefit from the TPS2054BDR's ability to switch entire peripheral sub-blocks off under firmware control. Operating from a 2.7 V to 5.5 V input, the quad switch accommodates Li-ion pack rails through low-dropout regulation stages or charge-pump-derived 5 V, and the 70 mOhm channels waste minimal energy: at 500 mA a channel drops only 35 mV and dissipates roughly 17.5 mW (estimated), preserving battery runtime. The 0.6 ms soft-start ramps each sub-block gently so inrush does not dip the battery rail enough to reset the microcontroller. The active-high enable lets the MCU power-gate the wireless module, display backlight, and sensor array independently, and during shutdown only switch leakage remains. If a peripheral is damaged and shorts, the 0.75 A to 1.25 A current limit prevents battery dump-through and the thermal shutdown protects the die, while the OC flag allows graceful firmware handling such as disabling that port and warning the user. One SOIC-16 replaces four discrete load switches, valuable in compact handheld layouts.
おすすめ
Networking and Router Peripheral Ports
Routers, IP cameras, and network-attached storage products include USB ports for storage dongles or LTE modems that must tolerate hot-plugging and arbitrary consumer devices. The TPS2054BDR gates those ports from the internal 5 V rail with per-port 500 mA capability consistent with USB 2.0 budgets; the 70 mOhm switch drop of about 35 mV at full load keeps VBUS within tolerance even with long internal traces. The 0.6 ms rise time suppresses the capacitive inrush of large storage devices, which otherwise would glitch the shared rail and reset the SoC. Should a connected modem or drive fail short, the 0.75 A to 1.25 A current limit contains the fault and the deglitched OC output informs the CPU, which can disable that port while the router continues routing traffic on the others - a resilience requirement in always-on network equipment. Undervoltage lockout prevents stutter during brownout events common in line-powered premises hardware. Thermal load is minimal (about 17.5 mW per active channel, estimated), so operation in fanless, convection-cooled network enclosures is straightforward.
おすすめ
Test and Measurement Instrument Accessory Power
Bench instruments, data loggers, and modular test systems provide accessory USB or auxiliary 5 V outputs whose reliability defines the user experience. The TPS2054BDR gives the instrument designer four independently controlled, current-limited outputs in one package: the 0.75 A to 1.25 A electronic current limit reacts in microseconds to protect the instrument supply from probe shorts or miswired accessories, far faster than a thermal fuse, and the deglitched OC flag can trigger an on-screen warning identifying the affected connector. The 2.7 V to 5.5 V input range works with the instrument's regulated 5 V rail even under sag, while undervoltage lockout guarantees that outputs stay off until the main supply is valid during power-up. Firmware can power-cycle an accessory via the active-high enable without user intervention. Because each 70 mOhm channel dissipates only about 17.5 mW at 500 mA (estimated I2R), the device adds negligible heat inside sealed instrument enclosures. For designs needing more ports, additional TPS2054BDR units share identical firmware drivers, simplifying scaling from one quad to a fully switched I/O panel.
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: TPS2054BDR — 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 | TPS2054ADR | TPS2054D | TPS2044BDR | ST2054BDR | TPS2054BDR-Q1 |
|---|---|---|---|---|---|---|
| Package | SOIC-16 (D) | SOIC-16 (D) - same | SOIC-16 (D) - same | SOIC-16 (D) - same | SOIC-16 (D) - same | SOIC-16 (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | Texas Instruments |
| Channels | 4 | 4 | 4 | 4 | 4 (2x1:2 config) | 4 |
| Continuous Current per Channel | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Automotive Grade | No | No | No | No | No | Yes (AEC-Q100) |
主な差別化要因
- Tightest specified current-limit band in the family （vs TPS2054D)
- Low switch drop at full USB load （vs ST2054BDR)
- Automotive path exists in same footprint （vs TPS2054BDR-Q1)
設計ノート
Estimated: at 500 mA per channel across the 70 mOhm switch, each channel dissipates I2R = 17.5 mW, so four fully loaded channels total roughly 70 mW - trivially handled by the SOIC-16 with normal PCB copper. The thermal design concern is not steady-state load but repeated short-circuit events, where the channel sits in current limit at up to 1.25 A; during these events the die heats rapidly and relies on internal thermal shutdown cycling. Keep the part away from other heat sources and ensure at least a modest ground-plane connection to the SOIC leads so fault-mode thermal cycling stays within datasheet limits.
Place a low-ESR ceramic capacitor (typically on the order of 0.1 uF to 10 uF per the TI datasheet application section) at the IN pin close to the device, and provide output capacitance at each downstream port to support hot-plug loads. Route the IN trace from the upstream 5 V rail with adequate width for the summed current of four channels (up to about 2 A aggregate before limiting). Keep the OC flag pull-up resistor tied to a valid logic rail; the open-drain output needs this pull-up to signal the host. Ground return paths for the four channels should converge at a low-impedance node to prevent fault-current-induced ground bounce from corrupting the enable logic.
Three frequent mistakes: (1) Exceeding the 5.5 V maximum input - the switch is rated only to 5.5 V, so unclamped wall-adapter transients require input TVS protection. (2) Ignoring the deglitch period on the OC flag - the fault output is intentionally deglitched, so inrush transients below the deglitch window will not assert OC; firmware must not expect instantaneous fault reporting. (3) Assuming the current limit is a precision threshold - the 0.75 A to 1.25 A band means downstream loads needing guaranteed current above 0.5 A continuous must be budgeted carefully; loads that legitimately draw near the limit may cycle in current-limit and trip thermal protection. Validate worst-case load profiles against the datasheet electrical tables.
コンプライアンス情報
Distributor listing indicates Lead Free Status / RoHS compliant for TPS2054BDR. Not AEC-Q100 qualified; use TPS2054BDR-Q1 for automotive.
