TPS22992 - 5.5V 6A 8.7mΩ Load Switch | Texas Instruments
料号： TPS22992 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.55 | $0.55 |
| 10 | $0.46 | $4.60 |
| 100 | $0.38 | $38.00 |
| 500 | $0.32 | $160.00 |
| 1,000 | $0.26 | $260.00 |
TPS22992 概述
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.
直接替换替代料： TPS22992 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS22992 （相同外形与封装尺寸） ——差异在于 Package.
快速对比工具——选择替代料号进行并排对比：
TPS22992S
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS22997RYZR
✅ 直接替换✓ 有现货
$1.1 / 个
查看数据手册 →TPS22992 最大额定值与电气特性
| Product Type | Single-channel load switch |
| On-Resistance (Ron) | 8.7 mΩ |
| 最大输出电流 | 6 A |
| 输入电压范围 | Up to 5.5 V |
| Number of Channels | 1 |
| Switch Type | N-channel high-side power MOSFET |
| 上升时间 | Adjustable (configurable) |
| 封装 | 8-WQFN-HR (1.5 mm x 1.25 mm) |
| 安装类型 | 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) 引脚配置指南
TPS22992（8-wqfn-hr (1.5 mm x 1.25 mm) 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： TPS22992.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS22992 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TPS22992 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS22992S | TPS22997 |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Family Membership | TPS22992x family | TPS22992x family | TI load switch family (separate) |
关键差异点
- Ultra-low 8.7 mΩ on-resistance at 6 A （对比 TPS22997)
- Adjustable rise time for inrush control （对比 Discrete MOSFET solutions)
- Trade-off: no output discharge on base variant （对比 TPS22992S)
设计说明
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.
合规信息
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.
