TPS22995RZFR - 3.8A, 18mΩ Load Switch | TI | Power Distribution
MPN: TPS22995RZFR ✓ AktifTPS22995RZFR Genel Bakış
A load switch is a power management IC that sits between a power rail and its load, using an internal MOSFET pass element to connect or disconnect the rail under logic control. Within the power management hierarchy (load switch -> power distribution switch -> power management IC), load switches handle controlled power sequencing, inrush limiting, and rail isolation in systems where a simple regulator cannot provide on/off control. The TPS22995 belongs to this load switch category and is optimized for low on-resistance and configurable startup behavior.
Key features include the 0.4 V to 5.5 V VIN range, a VBIAS supply range of 1.5 V to 5.5 V that keeps the internal gate drive strong even when VIN is very low, and adjustable slew rate control through an external capacitor on the CT pin. The adjustable rise time minimizes inrush current when charging large bulk capacitance, and the device provides overtemperature protection. An active-high ON pin enables straightforward GPIO interfacing.
Technically, the TPS22995 uses an N-channel MOSFET pass element with an internal charge-pump-derived gate drive supplied by VBIAS. This architecture delivers 18 mΩ typical on-resistance while maintaining low dropout at 3.8 A loads, and the RC-programmable CT pin allows designers to trade startup time against inrush current precisely.
Typical applications include powering core rails of processors and FPGAs, peripheral rail switches in smartphones and tablets, SSD and storage subsystem power sequencing, and battery-powered portable devices where controlled power-up extends battery life.
A key design consideration: choose the CT capacitor value so the 10%-90% rise time is long enough to limit inrush below the 3.8 A maximum continuous current when switching large capacitive loads. Oversizing the capacitor unnecessarily slows rail bring-up during power sequencing.
This page synthesizes distributor pricing, drop-in alternative data, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatifler için TPS22995RZFR — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller TPS22995RZFR (aynı form faktörü ve ayağa oturma) — farklı olan Configuration, On-Resistance (RON), Package, Product Type, Rise Time Control.
TPS22995RZGR
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Veri Şablonunu Görüntüle →TPS22995RZFR Maksimum Değerlendirmeler & Elektriksel Özellikler
| Product Type | Single-channel N-channel load switch |
| Input Voltage Range (VIN) | 0.4 V to 5.5 V |
| Bias Voltage Supply (VBIAS) | 1.5 V to 5.5 V |
| Maximum Continuous Current | 3.8 A |
| On-Resistance (RON) | 18 mΩ (typ.) |
| Rise Time Control | Adjustable via external capacitor (CT pin) |
| Enable Logic | Active-high ON pin |
| Protection Features | Overtemperature protection |
| İşletim Sıcaklığı Aralığı | -40C to +125C |
| Paket | 6-WQFN-HR (RZF), 1.25 mm x 0.85 mm |
| Number of Channels | 1 |
| Configuration | 1:1 high-side switch |
| Montaj Türü | Surface Mount |
| RoHS Durumu | Compliant |
| Manufacturer Datasheet | TPS22995 (available at ti.com) |
TPS22995RZFR 6-wqfn-hr (rzf), 1.25 mm x 0.85 mm Pin Yapısı Kılavuzu
TPS22995RZFR (6-wqfn-hr (rzf), 1.25 mm x 0.85 mm paket) için pin yapısı. Pin numaralandırma, işlevleri ve bağlantı şemaları üretici veri kitapçığında tanımlanmıştır. Doğru ayak ve soldurma kılavuzları için onu referans alın.
Ayrıntılı pin çıkış verisi mevcut değil: TPS22995RZFR.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
TPS22995RZFR için uygundur 6 uygulamas: Processor and FPGA Core Rail Switching, Smartphone and Tablet Peripheral Rails, SSD and Storage Power Sequencing, Battery-Backed System Power Gating, Industrial Module Rail Isolation, Test and Measurement Instrumentation Rails.
Processor and FPGA Core Rail Switching
The TPS22995RZFR fits processor and FPGA core rail switching because many modern cores run at 0.6 V to 1.0 V, inside its 0.4 V to 5.5 V VIN range, while 3.8 A of continuous current capacity and 18 mΩ on-resistance keep conduction losses near 0.26 W at full load. The VBIAS pin (1.5 V to 5.5 V) drives the internal N-channel gate independently of the low VIN, preserving low RON at low core voltages. The CT-programmable slew rate staggers core rail bring-up during power sequencing, limiting inrush when large decoupling networks charge.
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Smartphone and Tablet Peripheral Rails
In smartphones and tablets, camera modules, sensors, and RF front ends are switched on and off aggressively to save battery. The TPS22995RZFR suits this duty with a 1.25 mm x 0.85 mm WQFN-HR footprint that minimizes board area, an active-high ON pin that interfaces directly with PMIC GPIOs, and an adjustable rise time that suppresses inrush spikes which would otherwise cause battery-rail droop and audio pops. Its 18 mΩ RON keeps voltage drop negligible even at ampere-class peripheral loads, and -40C to +125C operation covers harsh thermal pockets near RF PAs.
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SSD and Storage Power Sequencing
Storage controllers require ordered rail bring-up between multiple supply domains, making the TPS22995RZFR an effective sequencing element. Its CT capacitor gives engineers explicit control of the 10%-90% rise time so each rail charges its bulk capacitance without exceeding the 3.8 A continuous limit, and the 0.4 V minimum VIN handles the lowest logic rails used by modern NAND controllers. The overtemperature protection adds a defensive layer in thermally constrained M.2 and U.2 form factors, while 18 mΩ on-resistance limits drop on high-current 3.3 V rails feeding DRAM and controller blocks.
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Battery-Backed System Power Gating
Battery-backed instruments and IoT gateways use the TPS22995RZFR to disconnect idle subsystems from the battery, eliminating quiescent drain in off-state loads. Because the switch passes VIN down to 0.4 V, it works directly on single-cell Li-Ion stacks as they discharge toward the converter brown-out threshold. The controlled slew rate avoids sudden load steps that would reset sensitive boost converters, and the active-high ON pin allows a microcontroller GPIO to gate entire power domains. At typical currents of a few hundred milliamps, conduction loss through 18 mΩ is only a few milliwatts.
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Industrial Module Rail Isolation
Industrial I/O modules and PLC interface cards use the TPS22995RZFR to isolate sensor excitation rails and field-side supplies during configuration or fault conditions. The -40C to +125C operating range matches industrial ambient requirements, and the 5.5 V maximum VIN covers standard 3.3 V and 5 V logic rails. The adjustable rise time prevents inrush-induced dips on shared 24 V-derived auxiliary rails, and overtemperature protection provides a last-line safeguard when a field-wiring fault loads the switched rail. Its 6-terminal, 0.85 mm-wide package suits dense module layouts.
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Test and Measurement Instrumentation Rails
Bench instruments and modular test systems benefit from the TPS22995RZFR as a clean, low-loss rail switch for analog front-end supplies. The 18 mΩ on-resistance and controlled, capacitor-programmed rise time make turn-on monotonic and repeatable - important where measurement repeatability matters - and the active-high ON pin allows front-panel or firmware-controlled enabling of individual signal-chain blocks. With 3.8 A capacity it comfortably powers amplifier and ADC analog rails, and overtemperature protection guards against accidental output shorts during probe experiments.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: TPS22995RZFR — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | TPS22995RZGR |
|---|---|---|
| Package | 6-WQFN-HR (RZF), 1.25 mm x 0.85 mm | 6-WQFN-HR (RZF), 1.25 mm x 0.85 mm - same |
| Brand | Texas Instruments | Texas Instruments |
| Input Voltage Range | 0.4 V to 5.5 V | 0.4 V to 5.5 V |
| Maximum Continuous Current | 3.8 A | 3.8 A |
| On-Resistance (typ.) | 18 mΩ | 18 mΩ |
| VBIAS Range | 1.5 V to 5.5 V | 1.5 V to 5.5 V |
| Rise Time Control | Adjustable via CT capacitor | Adjustable via CT capacitor |
| Operating Temperature | -40C to +125C | -40C to +125C |
Ana Farklılayıcılar
- Very low on-resistance at full load (karşılaştırma:TPS22995RZGR (same ratings) and typical 3 A-class load switches with 30-60 mΩ RON)
- Operates from very low input voltages (karşılaştırma:Load switches requiring VIN >= 0.8 V)
- Capacitor-programmable slew rate in an ultra-small footprint (karşılaştırma:TPS22995RZGR (identical feature set))
Tasarım Notları
Size the CT capacitor so the programmed slew rate keeps inrush below the 3.8 A continuous rating. Estimated: switching a 100 uF output capacitor with a 1 ms rise time draws a peak inrush near I = C * dV/dt = 100 uF * 5 V / 1 ms = 0.5 A, comfortably within rating; shortening the rise to 100 us pushes inrush to roughly 5 A, which exceeds the limit. Increase CT capacitance until the calculated peak stays under 3.8 A with margin.
The 6-WQFN-HR (RZF) package is only 1.25 mm x 0.85 mm, so power routing depends heavily on the board land pattern and thermal vias. Place the input ceramic capacitor within 1-2 mm of VIN, connect VOUT to the load with wide short traces or pours, and follow the TI datasheet land-pattern recommendation exactly - the ultra-small RZF footprint does not tolerate layout improvisation. Copy the CT capacitor layout directly from the datasheet typical application to keep the slew-control node clean.
Do not rely on the TPS22995RZFR for fault isolation: the datasheet description highlights overtemperature protection but no current-limit or eFuse behavior, so a downstream short must be handled by the upstream supply or a separate eFuse IC. Also verify VBIAS is established before or with VIN - the internal N-channel gate drive depends on VBIAS within 1.5 V to 5.5 V, and cycling ON with VBIAS absent can leave the output uncontrolled.
Uyumluluk Bilgisi
RoHS compliance per JLCPCB and distributor listings. REACH, halogen-free, and conflict-minerals declarations were not stated in the reviewed public listings; confirm on the TI product page quality section.
