TPS22995RZGR - 3.8A, 5.5V Load Switch 18mΩ | TI
MPN: TPS22995RZGR ✓ AktifTPS22995RZGR Genel Bakış
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.
Drop-in alternatifler için TPS22995RZGR — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller TPS22995RZGR (aynı form faktörü ve ayağa oturma) — farklı olan Configuration, On-Resistance (RON), Package, Product Type, Rise Time Control.
TPS22995RZFT
✅ Yerleştirme ⚠️ Onaylanmamış Özellikler📋 Katalogda Olmayan Referans Alternatifi
TPS22975DSGR
✅ Yerleştirme ⚠️ Onaylanmamış Özellikler📋 Katalogda Olmayan Referans Alternatifi
TPS22995RZGR Maksimum Değerlendirmeler & Elektriksel Özellikler
| 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 |
| Paket | 6-WQFN-HR (RZG), 1.5 mm x 0.75 mm |
| Pin Pitch | 0.4 mm and 0.5 mm options |
| Montaj Türü | Surface Mount |
| İşletim Sıcaklığı | -40C to +125C |
| RoHS Durumu | 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 Pin Yapısı Kılavuzu
TPS22995RZGR (6-wqfn-hr (rzg), 1.5 mm x 0.75 mm paket) için pin yapısı. Bu güç cihazı gate, drain ve kaynak terminal özelliklerlidir. Polarizasyonlu paketler için, doğru pin 1 yönlendirme ve ayak detayları için üretici veri kitapçığını referans alın. Orta uygulamalar arasında güç besleme tasarımı, motor kontrolü ve yük değiştirme bulunur.
Ayrıntılı pin çıkış verisi mevcut değil: TPS22995RZGR.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
TPS22995RZGR için uygundur 6 uygulamas: 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.
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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.
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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.
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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.
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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.
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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.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: TPS22995RZGR — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | 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 |
Ana Farklılayıcılar
- Very low on-resistance for the footprint (karşılaştırma:TPS22975DSGR)
- Separate bias input enables low-voltage operation (karşılaştırma:TPS22918)
- Adjustable slew rate limits inrush without extra ICs (karşılaştırma:TPS22995RZFT)
Tasarım Notları
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.
Uyumluluk Bilgisi
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.
