TPS2054AD - Quad 500mA USB Power Distribution Switch | TI
MPN: TPS2054AD ✓ Hoạt độngTPS2054AD Tóm tắt
A power-distribution switch, also called a high-side load switch or USB power switch, is a power management IC that sits between a supply rail and a load, turning the load on and off with a logic-level enable signal while protecting the upstream supply from faults. Within the power management hierarchy, it belongs to the power-distribution switch and load-driver class, complementing voltage regulators and hot-swap controllers in multi-port systems.
Key features include independent enable inputs (CMOS- and TTL-compatible, active-high) for each channel pair, a per-channel current limit with independent thermal and short-circuit protection, and a shared fault-report logic output that flags overcurrent conditions to a host controller. A 2.5 ms typical output rise time limits inrush current when switching heavy capacitive loads, and undervoltage lockout keeps the outputs off until the input rail is valid.
Architecturally, each N-channel MOSFET switch is driven by an internal charge-pump gate driver, which keeps on-resistance low at only 80 mOhm and minimizes voltage drop at full 500 mA load. Response to short circuits is fast, protecting the input rail from brownout during fault events.
Typical applications include USB host and hub port power switching, hot-plug power distribution in set-top boxes and peripherals, and multi-rail power sequencing in industrial systems where heavy capacitive loads and short circuits are likely.
A key design consideration: at 5.5 V input and full load on all four channels, estimate conduction loss as 4 x I^2 x RDS(on) = 4 x 0.25 x 0.08 = 80 mW (estimated), which the SOIC-16 package dissipates without a heatsink, but PCB copper around pins still aids thermal relief.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing, drop-in same-brand alternatives (TPS2054BD, TPS2054DG4), and practical design notes for power-distribution switching designs.
Bộ thay thế dễ dàng lắp đặt cho TPS2054AD — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS2054AD (cùng hình factor và footprint) — khác nhau ở Switch Type, Package, Category, Fault Reporting, On-Resistance.
TPS2054BDR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS2054BDR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS2054DG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS2054AD Tỷ lệ tối đa & tính chất điện
| Cấu trúc | 4 high-side switches (2 enable inputs / 4 outputs) |
| Switch Type | N-Channel MOSFET, high-side 1:1 |
| Phạm vi điện áp đầu vào | 2.7 V to 5.5 V |
| Continuous Output Current | 500 mA per channel |
| Giới hạn dòng điện | 0.9 A (minimum) |
| On-Resistance | 80 mOhm |
| Output Rise Time | 2.5 ms typical |
| Enable Inputs | Active-high, CMOS- and TTL-compatible |
| Fault Reporting | Overcurrent logic output, active-low |
| Protection Features | Independent thermal shutdown and short-circuit protection per channel, undervoltage lockout |
| Hộp | 16-SOIC (0.154 in, 3.90 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Danh mục | Power Management (PMIC) - Power Distribution Switches, Load Drivers |
Hướng dẫn cấu hình chân TPS2054AD 16-soic (0.154 in, 3.90 mm width)
Cấu hình chân cho TPS2054AD (16-soic (0.154 in, 3.90 mm width) gói). Động cơ điện này có chân cổng, nguồn và đầu ra. Đối với các gói không phân極, tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết hướng dẫn chính xác của chân 1 và chi tiết về vân footprint. Các ứng dụng phổ biến bao gồm thiết kế nguồn cung cấp điện, điều khiển động cơ và chuyển đổi tải.
Không có dữ liệu chân cụ thể sẵn có cho TPS2054AD.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
TPS2054AD phù hợp cho 6 Áp dụngs: USB Host and Hub Port Power Switching, Hot-Swap Power Distribution in Set-Top Boxes and Peripherals, Industrial Multi-Rail Power Sequencing, Battery-Powered and Portable Equipment Load Switching, Point-of-Load Power Gating in Networking Equipment, Test and Measurement Instrumentation Power Distribution.
USB Host and Hub Port Power Switching
The TPS2054AD is purpose-built for USB port power distribution: its 500 mA per-channel rating matches legacy USB VBUS current budgets, the 2.7 V to 5.5 V input range accepts both 3.3 V and 5 V system rails, and the 0.9 A current limit protects the upstream supply from overloaded or shorted downstream ports. The 2.5 ms typical rise time suppresses hot-plug inrush current when a device with large bulk capacitance is connected. Because the part provides four switches with independent enables and per-channel thermal and short-circuit protection in one SOIC-16 package, a hub designer can power-switch four downstream ports with a single IC and one fault output to the hub controller. The trade-off versus a discrete MOSFET solution is roughly 40 mV of dropout per port at full load, which must be budgeted within the VBUS droop requirement.
Được đề xuất
Hot-Swap Power Distribution in Set-Top Boxes and Peripherals
In set-top boxes, printers, and multi-function peripherals, several sub-systems are powered from a shared 5 V rail, and the TPS2054AD lets each sub-system be switched and protected independently. The device is, per TI documentation, intended for applications where heavy capacitive loads and short circuits are likely to be encountered, which describes hot-plug peripherals precisely. Its controlled 2.5 ms soft-start avoids the input-rail brownout that a hard-switched MOSFET would cause when a board with large input capacitors is inserted. The per-channel fault-report output gives the main processor visibility into which load misbehaved, enabling graceful recovery instead of a full-system reset. With 80 mOhm on-resistance, conduction loss is only about 20 mW per channel at 500 mA (estimated), so the SOIC-16 package needs no heatsink at typical loads.
Được đề xuất
Industrial Multi-Rail Power Sequencing
Industrial controllers frequently need several 5 V or 3.3 V loads switched in a defined order during power-up. The TPS2054AD supports this with two CMOS/TTL-compatible active-high enable inputs controlling four switch outputs, letting a microcontroller GPIO sequence rails with simple logic. Undervoltage lockout keeps all outputs off until the input rail is valid, preventing partially-powered operation during brownout. Because each channel has independent thermal and short-circuit protection, a fault on one actuator or sensor rail does not disable the remaining channels - important in factory equipment where uptime matters. The 2.7 V minimum input also supports 3.3 V-only logic boards. Designers should verify that total continuous load across four channels stays within the package thermal capability, which at moderate currents is not restrictive (estimated under 100 mW total at 500 mA per channel).
Được đề xuất
Battery-Powered and Portable Equipment Load Switching
Portable instruments and battery accessories running from 3.3 V or 5 V supplies use the TPS2054AD to disconnect idle loads and extend battery life. The N-channel MOSFET switches with 80 mOhm on-resistance present minimal series loss (about 20 mV dropout at 250 mA, estimated), preserving scarce voltage headroom on 3.3 V rails. TTL-compatible enables can be driven directly from low-voltage logic or a pushbutton debounce circuit, and the fault output can wake a supervisory MCU when a shorted accessory is detected. The quad configuration allows one IC to power-switch a display backlight, sensor front end, radio module, and memory card separately. Compared with discrete load-switch ICs with quiescent-current budgets that vary, this family was specifically characterized for USB-class portable power distribution per the TI datasheet.
Được đề xuất
Point-of-Load Power Gating in Networking Equipment
Routers, switches, and line cards often gate power to removable or optional modules such as SFP cages, fan trays, and management interfaces. The TPS2054AD provides four independently enabled, current-limited switches from one SOIC-16 footprint, reducing BOM count versus four discrete MOSFET-and-driver circuits. The 0.9 A minimum current limit is fast-acting enough to protect the backplane 5 V rail from a shorted module, and the fault-report line can route to the system CPLD or microcontroller for hot-swap event logging. The 2.5 ms soft-start is well matched to module input capacitance in the tens of microfarads. Because the part is available in the same footprint as the 70 mOhm TPS2054BD, high-availability designs can second-source within the family without any PCB change, which is a meaningful supply-chain benefit for long-life networking hardware.
Được đề xuất
Test and Measurement Instrumentation Power Distribution
Bench instruments and modular test fixtures use the TPS2054AD to power-gate DUT supplies, probe accessories, and interface boards independently. The precise 0.9 A current limit doubles as a coarse electronic fuse, protecting both the instrument supply and the device under test during accidental shorts - a common event in fixture debugging. Independent per-channel protection means a shorted DUT channel does not interrupt the others, so multi-site testing can continue. The fault output gives test software immediate overcurrent visibility for pass/fail logging. The SOIC-16 package hand-solders and reflows easily for fixture prototypes, and the 2.7 V to 5.5 V input range covers common lab rail voltages. At the modest currents typical of instrumentation loads, dropout of roughly 20-40 mV per channel is negligible against typical 5 V supply accuracy requirements (estimated).
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS2054AD — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TPS2054BDR | TPS2054BD | TPS2054DG4 |
|---|---|---|---|---|
| Package | 16-SOIC (D) | 16-SOIC (D) - same | 16-SOIC (D) - same | 16-SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| On-Resistance | 80 mOhm | 70 mOhm | 70 mOhm | 80 mOhm |
| Continuous Current per Channel | 500 mA | 500 mA | 500 mA | 500 mA |
| Current Limit | 0.9 A (min) | 0.9 A (min) | 0.9 A (min) | 0.9 A (min) |
| Input Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Fault Report Output | Yes | Yes | Yes | Yes |
| Output Rise Time | 2.5 ms typical | 2.5 ms typical | 2.5 ms typical | 2.5 ms typical |
Bảo phân biệt quan trọng
- Lower conduction loss option available on identical footprint (vsTPS2054BDR)
- Quad channels with independent protection in one package (vsDiscrete MOSFET solutions)
- Controlled 2.5 ms soft-start (vsPlain high-side MOSFET switches)
Ghi chú thiết kế
Estimated: with all four channels at 500 mA continuous from a 5 V input, conduction loss is 4 x I^2 x RDS(on) = 4 x 0.25 A^2 x 0.08 Ohm = 80 mW total, which the 16-SOIC package handles without a heatsink. If loads approach the 0.9 A current limit continuously, per-channel loss rises to about 65 mW each (estimated), so provide solid ground copper around the SOIC-16 pads and verify junction temperature against the datasheet thermal impedance for your board stackup.
Place a low-ESR ceramic input capacitor (typical practice for this TI family is on the order of 1 uF to 10 uF, confirm the datasheet typical-application circuit) close to the VDD pin, and add output capacitance at each channel near the load connector to absorb hot-plug transients. Keep the fault-report trace routed to the host controller with a pull-up to a valid logic rail, since it is an open-style logic output. Power and ground traces for the switch outputs should be sized for 500 mA continuous per channel.
Do not drive loads above the 500 mA continuous rating - the 0.9 A current limit is a protection threshold, not an operating point; sustained operation near the limit triggers thermal cycling of the affected channel. Ensure enable inputs are not left floating during power-up; tie them to ground if unused, since undervoltage lockout alone does not define pin states before the input rail stabilizes. Also remember the 2.5 ms rise time: very small output capacitance with light loads is fine, but do not add series inductance (long cables) without reviewing inrush behavior against the current limit.
Thông tin tuân thủ
Compliance status not explicitly stated in the provided web data. Verify RoHS/REACH status on the official TI product page at ti.com/product/TPS2054 before production use.
