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NXP Semiconductors PCA9411AUKZ
- Part No.:
- PCA9411AUKZ
- Manufacturer:
- NXP Semiconductors
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
PCA9411AUKZ.pdf
- Description:
- IC REG BOOST 5.25V 500MA 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:5,242
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Product details
Overview
PCA9411AUKZ from NXP Semiconductors is a 3.0 MHz, 500 mA step-up DC-DC converter optimized for battery-powered NFC and smartphone applications. It accepts 2.5 V–5.25 V input and delivers a regulated 5.25 V output with ±3% accuracy across full load, voltage, and temperature range, enabling extended battery life via up to 94% peak efficiency.
For engineers reviewing the PCA9411AUKZ datasheet, PCA9411AUKZ pinout, PCA9411AUKZ application, or PCA9411AUKZ equivalent, key selection criteria include forced pass-through mode behavior on EN low, WLCSP9 package constraints, soft-start current limiting, thermal/overcurrent protection, and input-to-output disconnect vs. pass-through distinction versus PCA9411UKZ.
Technical Context
The PCA9411AUKZ implements a current-mode controller with synchronous rectification, operating at a fixed 3.0 MHz switching frequency to support compact 1 µH inductors. Its architecture integrates a pre-charge state machine for inrush control and boost soft-start, ensuring stable startup without external sequencing.
Unlike the PCA9411UKZ, the PCA9411AUKZ enters forced pass-through mode when EN is pulled low-providing near-zero-drop VIN-to-VOUT conduction-while retaining PMOS overcurrent protection active. Automatic pass-through triggers when VIN exceeds 5.25 V, and thermal shutdown activates at 150 °C with 20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.25 V ±3% over full load, input, and temperature range-ensures stable USB-compliant power rail generation. |
| Switching Frequency | 3.0 MHz (2.91–3.09 MHz) - enables use of sub-1 µH inductors and reduces output ripple without increasing EMI filter size. |
| Peak Efficiency | 94% at optimal load-minimizes thermal dissipation in space-constrained portable designs. |
| Output Current Limit | 700 mA at VIN = 5.0 V; 400 mA at VIN = 2.5 V-defines maximum deliverable load under worst-case battery voltage. |
| Enable Logic Behavior | EN low = forced pass-through (VIN directly connected to VOUT); EN high = boost mode-enables seamless transition between battery and system rail. |
| Thermal Protection | Shuts down at 150 °C junction temperature; restarts after cooling to 130 °C-prevents permanent damage during sustained overload or poor PCB thermal design. |
| Input Voltage Range | 2.5 V to 5.25 V-supports single-cell Li-ion (2.7–4.2 V), Li-polymer, and boosted legacy rails. |
Pinout & Package
PCA9411AUKZ uses a Wafer-Level Chip-Size Package (WLCSP9) with 0.4 mm pitch, 1.24 × 1.24 × 0.525 mm body, and nine solder bumps. The package supports ultra-compact layout for NFC antenna proximity and RF-sensitive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A1, A2) | Regulated output node | Dual-bump connection to output capacitor-reduces impedance and improves transient response; must connect directly to COUT with shortest possible path. |
| VIN (A3) | Main power input | Connects to Li-ion battery or primary supply; supports UVLO with 2.1 V rising threshold and 70–120 mV hysteresis. |
| SW (B1, B2) | Switching node | Drives external inductor; dual-bump configuration lowers parasitic inductance and minimizes switching losses at 3 MHz. |
| EN (B3) | Enable control input | Active-high logic; internal 640 kΩ pull-down ensures defined state at power-up; requires ≥500 µs HIGH pulse before forced pass-through entry. |
| PGND (C1, C2) | Power ground return | High-current return path for inductor and output capacitor-must be flooded with ground plane and tied to AGND at single point. |
| AGND (C3) | Analog reference ground | Signal reference for feedback and regulation circuitry; isolated from noisy PGND except at one star point to prevent ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Pass-Through Mode | EN low connects VIN directly to VOUT with minimal voltage drop-eliminates diode loss and enables seamless bypass during high-input conditions. |
| Integrated Soft Start | Two-stage pre-charge (inrush control + boost ramp) limits inrush current and prevents input dip-no external components required. |
| Synchronous Rectification | Integrated NMOS and PMOS switches with 70 mΩ (N) / 80 mΩ (P) RDS(on)-replaces external Schottky diode and improves light-load efficiency. |
| Overcurrent Protection | PMOS current sensing with 20 ms fault timeout and automatic restart-protects against shorted loads without latch-up. |
| Low Quiescent Current | 3.0 µA typical supply current in disable state-preserves battery life during standby in always-on NFC terminals. |
Applications
| Smartphones | NFC Terminals |
|---|---|
Use Scenario: Powering NFC transceivers and secure elements from a single-cell Li-ion battery with variable voltage (2.7–4.2 V). IC Role / Device Role / Timing Role: Step-up regulator providing stable 5.25 V rail for ISO/IEC 14443-A/B analog front-end and digital controller. Use Value: Forced pass-through mode maintains operation as battery voltage rises above 5.25 V, avoiding unnecessary conversion loss and heat generation. |
Use Scenario: Enabling contactless payment readers with fast wake-up and low-noise power delivery in compact handheld form factors. IC Role / Device Role / Timing Role: High-frequency boost converter supplying clean 5.25 V to NFC IC while minimizing EMI near antenna loop. Use Value: 3.0 MHz operation allows tiny 1 µH inductor placement adjacent to antenna-reducing board area and preserving antenna Q-factor. |
| Wearable Health Monitors | IoT Edge Sensors |
Use Scenario: Boosting voltage from coin-cell or thin-film battery to drive BLE SoC peripherals requiring 5 V USB-compatible interface. IC Role / Device Role / Timing Role: Efficient DC-DC converter with ultra-low quiescent current supporting intermittent sensor burst transmission. Use Value: 3.0 µA shutdown current extends shelf life; soft-start prevents brown-out during cold-start from depleted battery. |
Use Scenario: Powering optical or environmental sensors with 5 V analog signal chains in energy-harvesting or battery-operated gateways. IC Role / Device Role / Timing Role: Regulated boost source delivering low-noise 5.25 V with <2 mV coherent ripple (100 kHz–1.5 MHz). Use Value: Dual ground pins (PGND/AGND) and tight output voltage tolerance ensure ADC reference stability and measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9411UKZ | EN low = total input-to-output disconnect; no pass-through capability; identical pinout and package. | Suitable where complete isolation during disable is required (e.g., safety-critical power gating). | Select PCA9411UKZ only if forced pass-through is undesirable; PCA9411AUKZ cannot substitute in disconnect-only designs. |
| TPS61291DRVR | 3.0 V–5.5 V input; 5.0 V output; 92% peak efficiency; 2.5 MHz switching; no forced pass-through mode. | Designed for general-purpose portable boost; lacks EN-controlled pass-through and tighter output accuracy (±4%). | Use TPS61291DRVR when cost or TI ecosystem preference outweighs need for 5.25 V precision or forced pass-through. |
Compared with PCA9411UKZ, PCA9411AUKZ trades isolation for seamless rail continuity; compared with TPS61291DRVR, it offers higher output accuracy, lower noise, and unique EN-triggered pass-through-critical for NFC and battery-voltage-tracking systems.
Availability
PCA9411AUKZ is available at Aetrix Electronics and suitable for smartphones, NFC terminals, wearable health monitors, and IoT edge sensors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for PCA9411AUKZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and mobile applications, with leadership in NFC, RFID, and power management ICs.
The PCA9411AUKZ belongs to NXP's ultra-compact DC-DC boost converter product line, designed specifically for space-constrained, battery-powered NFC and mobile peripheral applications demanding high efficiency and intelligent enable-controlled rail management.
FAQ
What is the key functional difference between PCA9411AUKZ and PCA9411UKZ?
The PCA9411AUKZ enters forced pass-through mode when the EN pin is pulled low-connecting VIN directly to VOUT-whereas the PCA9411UKZ fully disconnects input from output in disable state. This makes PCA9411AUKZ ideal for applications needing uninterrupted power delivery during battery voltage transitions, such as NFC readers. Both share identical pinout, package, and boost functionality.
Does PCA9411AUKZ require external components to operate?
Yes, PCA9411AUKZ requires an external inductor (recommended 1 µH), input capacitor (≥2.2 µF), and output capacitor (≥3.0 µF at 5.25 V bias). No external compensation or feedback resistors are needed-the 5.25 V output is internally fixed. Layout best practices mandate short, wide traces between SW/VOUT/PGND pins and their respective passive components to maintain stability and EMI performance.
What is the minimum EN pulse width required to initialize PCA9411AUKZ in forced pass-through mode?
The PCA9411AUKZ requires the EN pin to be held HIGH for at least 500 µs before being pulled LOW to enter forced pass-through mode reliably. Shorter pulses may result in undefined behavior or failure to engage pass-through. This timing ensures proper initialization of the internal state machine and avoids premature transitions during power-up sequences.
How does PCA9411AUKZ handle overcurrent events?
Upon detecting overcurrent, PCA9411AUKZ disables both PMOS and NMOS switches, halting power delivery for 20 ms before automatically restarting in pre-charge mode. This fault recovery cycle protects the IC and external components without requiring external reset circuitry. The PMOS overcurrent protection remains active even during automatic or forced pass-through modes.
Is PCA9411AUKZ compatible with lead-free reflow processes?
Yes, PCA9411AUKZ uses a lead-free WLCSP9 package and is qualified for standard lead-free reflow profiles per J-STD-020D. Its package thickness (0.525 mm) and volume (<350 mm³) specify a peak reflow temperature of 260 °C. Moisture sensitivity level (MSL) compliance must be observed-baking and dry-pack handling are required if floor life is exceeded prior to assembly.
PCA9411AUKZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 5.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLCSP (1.24x1.24)
PCA9411AUKZ FAQ
1.How can I place an order for PCA9411AUKZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9411AUKZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PCA9411AUKZ reliable?
The price and inventory of PCA9411AUKZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9411AUKZ is usually 5 days.
3.What payment methods are accepted for PCA9411AUKZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9411AUKZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9411AUKZ?
PCA9411AUKZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9411AUKZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PCA9411AUKZ?
For technical support, including PCA9411AUKZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9411AUKZ requirements.
6.How does Aetrix verify that PCA9411AUKZ is sourced from the original manufacturer or authorized distributors?
All PCA9411AUKZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCA9411AUKZ meets industry standards.
7.What is the process for return or replacement of PCA9411AUKZ?
All PCA9411AUKZ units undergo pre-shipment inspection (PSI). If there is an issue with PCA9411AUKZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PCA9411AUKZ part is unused and in its original packaging.
Return procedure for PCA9411AUKZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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