TPS22995RZGR - 3.8A, 5.5V Load Switch 18mΩ | TI
料号： TPS22995RZGR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.52 | $5.20 |
| 100 | $0.38 | $38.00 |
| 500 | $0.31 | $155.00 |
| 1,000 | $0.26 | $260.00 |
TPS22995RZGR 概述
A load switch is a type of power distribution switch, which itself sits within the broader power management IC hierarchy. Load switches use an integrated MOSFET pass element controlled by a logic input to connect or disconnect a power rail from its load, enabling power sequencing, rail gating, and inrush-current control in multi-rail systems. The TPS22995 implements this function with a low-resistance N-channel MOSFET that reduces dropout voltage for low-voltage, high-current rails.
Key features include the 0.4 V to 5.5 V VIN range, a separate bias supply (VBIAS) operating from 1.5 V to 5.5 V that fully enhances the N-channel MOSFET even at very low input voltages, and adjustable output slew-rate control through an external capacitor on the CT pin. The adjustable rise time enables precise power-on sequencing and limits inrush current during startup, protecting upstream regulators and connectors.
Technically, the device achieves its 18 mΩ typical on-resistance by driving the N-channel pass transistor gate above the input rail using the bias supply. This architecture yields very low voltage drop at multi-ampere loads, minimizing power loss (I²R) and thermal stress. Typical on-resistance keeps dissipation low: at 3.8 A the conduction loss is only about 0.26 W (Estimated: I²R = 3.8² x 0.018).
Typical applications include power rail gating in battery-powered portable electronics, SSD and storage peripherals, micro-IoT hardware with limited PCB real estate, and industrial point-of-load distribution where a small, low-loss switch is required.
When designing with this device, always provide the VBIAS supply (1.5 V to 5.5 V) with local decoupling, and size the CT capacitor to set the rise time appropriate for the load capacitance to control inrush current.
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： TPS22995RZGR ——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： TPS22995RZGR （相同外形与封装尺寸） ——差异在于 Configuration, On-Resistance (RON), Package, Product Type, Rise Time Control.
快速对比工具——选择替代料号进行并排对比：
TPS22995RZFT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS22975DSGR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS22995RZGR 最大额定值与电气特性
| Product Type | N-Channel High-Side Load Switch |
| Number of Channels | 1 |
| Input Voltage Range (VIN) | 0.4 V to 5.5 V |
| Bias Supply Range (VBIAS) | 1.5 V to 5.5 V |
| Maximum Continuous Current | 3.8 A |
| On-Resistance (RON) | 18 mΩ typ / 20 mΩ max |
| Rise Time Control | Adjustable via external CT capacitor |
| Configuration | High Side |
| 封装 | 6-WQFN-HR (RZG), 1.5 mm x 0.75 mm |
| Pin Pitch | 0.4 mm and 0.5 mm options |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +125C |
| RoHS 状态 | Compliant |
| Packaging | Tape & Reel (R) |
| Applications | Power distribution, rail gating, battery-powered portable devices |
TPS22995RZGR 6-wqfn-hr (rzg), 1.5 mm x 0.75 mm 引脚配置指南
TPS22995RZGR（6-wqfn-hr (rzg), 1.5 mm x 0.75 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： TPS22995RZGR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS22995RZGR 适用于 6 应用s: Battery-Powered Portable Electronics, SSD and Storage Peripherals, Micro-IoT Hardware, Industrial Point-of-Load Distribution, Power Rail Sequencing for Processors, Hot-Swap and Load Switching for Communication Modules.
Battery-Powered Portable Electronics
The TPS22995RZGR is purpose-built for rail gating in battery-powered portable devices such as smartphones, tablets, and wearable electronics. Its 1.5 mm x 0.75 mm WQFN-HR package fits where PCB real estate is scarce, while the 18 mΩ typical on-resistance keeps series drop to under 40 mV at a 2 A load - critical when the rail sits at 3.7 V or lower. The 0.4 V to 5.5 V VIN range covers single-cell lithium and USB-derived rails alike. The adjustable rise time via the CT pin limits inrush when connecting large bulk capacitance, preventing brownouts of the shared battery rail. Placing the switch between the battery and a subsystem rail lets firmware power-gate idle loads, extending standby runtime.
推荐
SSD and Storage Peripherals
Solid-state drives and external storage peripherals draw multi-ampere bursts on 3.3 V or 5 V rails, making the TPS22995RZGR an effective power-distribution switch. Its 3.8 A maximum continuous current covers typical SSD active loads, and the 18 mΩ on-resistance means only about 0.26 W of conduction loss at full current (Estimated: I²R = 3.8² x 0.018), avoiding the thermal hotspots that higher-Ron switches create in enclosed enclosures. The adjustable slew rate protects USB or Thunderbolt upstream ports from inrush during hot-plug enumeration. The separate VBIAS input (1.5 V to 5.5 V) lets designers bias the switch from an always-on standby rail so it stays fully enhanced even during low-voltage transient conditions on the main rail.
推荐
Micro-IoT Hardware
Micro-IoT nodes and sensor endpoints with limited PCB area benefit from the TPS22995RZGR's chip-scale footprint and low-loss switching. The 6-pin WQFN-HR package with 0.4 mm and 0.5 mm pitch options accommodates fine-pitch routing on two-layer boards. Power-gating sensors or radios through the 3.8 A capable switch eliminates standby quiescent drain of downstream ICs, which is often the dominant term in battery-life calculations for duty-cycled nodes. The ON logic input interfaces directly to microcontroller GPIO, enabling firmware-controlled sequencing. Using the CT pin to stretch the rise time prevents voltage dips on the shared coin-cell or Li-SOCl2 rail when capacitive sensor loads connect.
推荐
Industrial Point-of-Load Distribution
In industrial control boards, the TPS22995RZGR distributes 3.3 V to 5 V sub-rails to field-replaceable modules, fans, and sensors. The -40C to +125C operating range suits unconditioned cabinets, and the N-channel MOSFET architecture with bias supply holds 18 mΩ on-resistance across the full temperature envelope, unlike VIN-driven P-channel switches whose Ron degrades when the rail sags. The adjustable rise time enables staged power-up of multiple rails controlled from one supervisor, mitigating peak inrush on factory 24 V-derived front ends. Its 3.8 A rating plus the low voltage drop keep downstream brownout detectors stable during motor-start transients on shared rails.
推荐
Power Rail Sequencing for Processors
Multi-rail processors such as FPGAs and SoCs require controlled power-up order between core, I/O, and auxiliary rails. The TPS22995RZGR provides that sequencing as a discrete high-side switch: the ON pin chained from a supervisor or another rail's power-good output enforces order, while the CT-programmed rise time keeps each rail's inrush within the upstream regulator's current limit. With 3.8 A capacity and 18 mΩ on-resistance, the switch can carry FPGA I/O bank rails without measurable dropout. The VBIAS input (1.5 V to 5.5 V) can be tied to an early always-on rail so the switch enhances fully regardless of when the switched VIN rail rises.
推荐
Hot-Swap and Load Switching for Communication Modules
Cellular modems, Wi-Fi modules, and GNSS receivers in networking hardware often need to be power-cycled independently to recover from lockups. The TPS22995RZGR isolates such modules from the shared 3.3 V or 5 V rail: the 3.8 A rating handles modem transmit bursts, and the 18 mΩ on-resistance keeps the switch drop below 80 mV at 4 A peaks, staying within module tolerance. The adjustable rise time limits inrush into the module's input capacitors on reconnection, and the CT control allows firmware-defined soft-start profiles. The compact WQFN-HR footprint allows one switch per module on densely routed carrier boards.
推荐
推荐产品汇总
工程参考数据： TPS22995RZGR ——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 | TPS22995RZFT | TPS22975DSGR |
|---|---|---|---|
| Package | 6-WQFN-HR (RZG), 1.5 mm x 0.75 mm | 6-WQFN-HR (RZG), 1.5 mm x 0.75 mm - same | 6-WQFN (DSG), 0.65 mm x 0.9 mm - different footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Maximum Continuous Current | 3.8 A | 3.8 A | 3 A |
| Input Voltage Range | 0.4 V to 5.5 V | 0.4 V to 5.5 V | 0.6 V to 5.5 V |
| Bias Supply (VBIAS) | 1.5 V to 5.5 V | 1.5 V to 5.5 V | Not required (internal) |
| Rise Time Control | Adjustable (CT pin) | Adjustable (CT pin) | Adjustable (CT pin) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +85C |
关键差异点
- Very low on-resistance for the footprint （对比 TPS22975DSGR)
- Separate bias input enables low-voltage operation （对比 TPS22918)
- Adjustable slew rate limits inrush without extra ICs （对比 TPS22995RZFT)
设计说明
Place a local decoupling capacitor (typically 1 uF ceramic) as close as possible to the VBIAS pin. In a TI E2E power-management forum thread on the TPS22995RZGR, TI support confirmed the bias pin should be locally decoupled because it drives the MOSFET gate above VIN. Keep the VIN-to-VOUT high-current path short with wide traces (at least 20 mil for 3.8 A) to limit parasitic resistance in series with the 18 mΩ switch.
Size the CT capacitor for the load capacitance being switched. Estimated guidance: inrush current Iinrush approximately equals Cload x VOUT/trise; choose trise so inrush stays below the upstream regulator current limit. For a 100 uF load capacitor charged to 3.3 V with a 1 ms rise time, average inrush is roughly 0.33 A - well within the 3.8 A rating, but verify against your specific bulk capacitance.
Do not operate the TPS22995 without valid VBIAS (1.5 V to 5.5 V) present before or with VIN; without adequate gate bias the N-channel MOSFET cannot fully enhance and effective on-resistance rises sharply, causing excess dissipation. Also note the TI E2E forum documents confusion between RZG and RZF package views in the datasheet figures - confirm which package option (0.4 mm vs 0.5 mm pitch) your layout matches before fabricating the PCB.
合规信息
RoHS compliance per DigiKey distributor listing. REACH, halogen-free, and conflict-minerals status not stated in the provided data - verify on TI.com quality pages.
