TPS22992 - 5.5V 6A 8.7mΩ Load Switch | Texas Instruments
MPN： TPS22992 ✓ 啟用中TPS22992 概覽
A load switch is a power management IC that sits between a power rail and its load, using an internal MOSFET pass element and control logic to connect or disconnect the load on demand. Load switches occupy the middle of the power management IC hierarchy, below full DC-DC converters and above discrete MOSFET solutions, providing controlled power-up, inrush limiting, rail sequencing, and fault isolation that a bare MOSFET cannot deliver without significant external circuitry.
Key features of the TPS22992 include the ultra-low 8.7 mΩ on-resistance, which limits conduction losses to roughly 78 mW at a full 6 A load, an input voltage range up to 5.5 V, and a configurable rise time that gives designers flexibility for power sequencing. The adjustable rise time also minimizes inrush current when switching high-capacitance loads such as large ceramic capacitor banks or downstream SoC core rails.
Technically, the TPS22992 uses an N-channel high-side power MOSFET driven by an internal charge-pump gate driver, which allows the switch to achieve extremely low Ron without the voltage-drop penalty of a P-channel device. The TPS22992x family consists of two members: the TPS22992 and the TPS22992S, which differ in their output discharge behavior, letting designers choose whether the output rail floats or is actively pulled low when the switch is disabled.
Typical applications include powering processor cores and I/O rails in servers and SSDs, peripheral port power control in industrial systems, and general 5V-rail power distribution where a compact 6 A switch replaces discrete MOSFET-plus-driver solutions.
When designing with the TPS22992, account for thermal rise at sustained high load: at 6 A, I2R losses through the 8.7 mΩ switch demand a solid ground-plane copper pour under the WQFN-HR thermal pad to keep junction temperature within limits.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 TPS22992 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TPS22992 （相同外形與佔位） — 差異在於 Package.
TPS22992S
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS22997RYZR
✅ 直接替換聯絡詢價
查看資料表 →TPS22992 最大額定值與電氣特性
| Product Type | Single-channel load switch |
| On-Resistance (Ron) | 8.7 mΩ |
| 最大輸出電流 | 6 A |
| 輸入電壓範圍 | Up to 5.5 V |
| Number of Channels | 1 |
| Switch Type | N-channel high-side power MOSFET |
| 上升時間 | Adjustable (configurable) |
| 封裝 | 8-WQFN-HR (1.5 mm x 1.25 mm) |
| 安裝類型 | Surface Mount |
| Output Discharge | TPS22992 variant; TPS22992S variant available in family |
| Inrush Current Control | Minimized via adjustable rise time |
TPS22992 8-wqfn-hr (1.5 mm x 1.25 mm) 腳位配置指南
TPS22992（8-wqfn-hr (1.5 mm x 1.25 mm) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： TPS22992.
請參閱 資料表 以查看完整腳位配置。
典型應用
TPS22992 適用於 6 應用s: Server and Data Center Power Distribution, SSD and Storage Controller Power Switching, Industrial Peripheral Port Power Control, Processor Core Rail Sequencing, Battery-Powered and Portable High-Current Loads, Hot-Plug Style Capacitive Load Insertion.
Server and Data Center Power Distribution
The TPS22992 fits server and data center power trees where multiple 5 V rails must be switched independently under GPIO control. Its 8.7 mΩ on-resistance keeps conduction loss to roughly 0.31 W at a full 6 A load, limiting thermal burden in dense rack hardware, while the adjustable rise time tames inrush current when energizing large decoupling networks on SoC core rails. Implemented as a high-side N-channel switch with internal charge-pump drive, it drops directly between the 5 V supply rail and downstream point-of-load converters, enabling fault isolation and sequenced power-up of blades, NICs, and storage trays without discrete driver circuitry.
推薦
SSD and Storage Controller Power Switching
Storage devices switch multiple rails to meet power-state transition requirements, and the TPS22992 is well matched to this role. The 5.5 V input rating covers standard 5 V system rails, the 6 A capability supports peak SSD controller currents, and the configurable rise time limits inrush into the large bulk capacitance demanded by storage controllers during hot-plug-style power events. Placed between the SATA/M.2 5 V feed and the onboard buck converters, the switch provides a defined power-on ramp and clean disconnect during shutdown; choosing the TPS22992S variant actively discharges the output at turn-off, preventing residual rail float that could latch the controller in an undefined state.
推薦
Industrial Peripheral Port Power Control
Industrial I/O modules, sensor hubs, and fieldbus nodes frequently need to power-cycle individual peripherals under firmware control for fault recovery or power budgeting. The TPS22992 provides a compact 6 A switch for these ports: the 8.7 mΩ MOSFET minimizes voltage drop so the peripheral sees nearly the full 5 V rail, and the adjustable rise time prevents inrush trips of upstream current-limit circuits when reconnecting capacitive loads. Integrated into the port power path, it enables remote reset of a stuck sensor or actuator without a full system reboot, and its tiny WQFN-HR footprint fits the dense I/O daughter-card layouts typical of factory automation hardware.
推薦
Processor Core Rail Sequencing
Multi-rail processors require controlled power-up order between core, I/O, and memory supplies. The TPS22992 supports this by acting as an adjustable-rise-time enable switch placed between a always-on 5 V rail and a downstream regulator or directly on a moderate-current rail. The configurable ramp lets designers stagger turn-on edges so no rail leads or lags its sequencing partner, and the 6 A rating covers many I/O and memory rails directly. Because the switch integrates its own charge-pump gate drive, sequencing behavior is characterized and repeatable, unlike discrete MOSFET solutions whose turn-on edge depends on external RC tolerances across temperature.
推薦
Battery-Powered and Portable High-Current Loads
Portable instruments and battery-operated devices that drive high-current loads such as displays, radios, or motors benefit from the TPS22992 combination of very low on-resistance and small size. At a 3 A load, conduction loss through 8.7 mΩ is only about 78 mW, preserving battery runtime compared with higher-Ron switches, and the WQFN-HR 1.5 mm x 1.25 mm footprint suits handheld PCB space constraints. The enable-controlled switch disconnects idle subsystems to eliminate leakage, while the soft-start ramp protects downstream ceramic capacitors from hard-charging stress during each power event, extending system reliability in duty-cycled operation.
推薦
Hot-Plug Style Capacitive Load Insertion
Systems that connect new load boards, mezzanine cards, or capacitor-heavy modules onto live backplanes must limit the inrush current drawn by the newly inserted load's bulk capacitance, or supply rails dip and upstream systems glitch. The TPS22992 addresses this directly: its adjustable rise time converts a hard connection into a controlled ramp, with inrush approximately equal to C_load multiplied by dV/dt. For a 200 uF module charged over 2 ms, that is roughly 0.5 A rather than tens of amps. The 6 A continuous rating then sustains full module operation with minimal voltage drop, making it a compact alternative to discrete hot-swap stages for moderate-current slots.
推薦
推薦產品摘要
工程參考資料，適用於 TPS22992 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS22992S | TPS22997 |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Family Membership | TPS22992x family | TPS22992x family | TI load switch family (separate) |
主要差異化特點
- Ultra-low 8.7 mΩ on-resistance at 6 A (對比TPS22997)
- Adjustable rise time for inrush control (對比Discrete MOSFET solutions)
- Trade-off: no output discharge on base variant (對比TPS22992S)
設計說明
Estimated: at a full 6 A continuous load, conduction loss through the 8.7 mΩ switch is about 0.31 W (I2R = 36 A2 x 0.0087 Ω). The 1.5 mm x 1.25 mm WQFN-HR package cannot dissipate this alone, so connect the exposed pad to a solid ground plane with multiple thermal vias. Validate junction temperature using the datasheet theta-JA for your specific PCB stack-up rather than the JEDEC standard board figure.
Route the 6 A current path with wide copper - at minimum 2 oz copper pours on the input and output traces, since narrow traces add series resistance that defeats the purpose of the 8.7 mΩ switch. Place the input ceramic capacitor within 2 mm of the VIN pin to suppress supply droop during turn-on, and keep the rise-time capacitor (CT) node short and away from the high-current path to avoid noise coupling into the ramp circuit.
Do not exceed the 5.5 V absolute input limit - 5 V rails with transient overshoot can exceed this, so verify rail tolerance before choosing this switch. Also remember the family distinction: the TPS22992 does not actively discharge the output when disabled, so if downstream circuits need a defined low at shutdown, select the TPS22992S variant instead; substituting blindly between the two suffixes changes shutdown behavior.
合規資訊
AEC-Q100 not_applicable/qualified: an E2E forum request (May 2025) for an AEC-qualified equivalent of the TPS22992SRXNR indicates no automotive-qualified version was offered at that time. RoHS/REACH/lead-free status must be verified per orderable suffix on the TI environmental page.
