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NXP Semiconductors PCA9412AUKZ
- Part No.:
- PCA9412AUKZ
- Manufacturer:
- NXP Semiconductors
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
PCA9412AUKZ.pdf
- Description:
- IC REG BOOST 5.4V 300MA 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
The PCA9412AUKZ from NXP Semiconductors is a 3.0 MHz, 300 mA step-up DC-DC converter optimized for NFC antenna power delivery in battery-powered portable devices. It accepts 2.5 V–5.25 V input and delivers a regulated 5.4 V output with up to 94 % efficiency, enabling extended battery life and compact antenna design in smartphones and NFC terminals.
For engineers reviewing the PCA9412AUKZ datasheet, PCA9412AUKZ pinout, PCA9412AUKZ application, or PCA9412AUKZ equivalent, key selection criteria include forced pass-through mode behavior on EN low, WLCSP9 package constraints, 3 MHz switching frequency impact on inductor sizing, and thermal/overcurrent protection thresholds at −40 °C to +85 °C.
Technical Context
The PCA9412AUKZ implements a current-mode controller with integrated PMOS/NMOS power switches and soft-start logic that enforces true load disconnect during pre-charge. Its enable pin triggers forced pass-through mode (VIN = VOUT) when pulled low-distinct from the PCA9412's total disconnect-and requires ≥500 µs high pulse before transition to ensure stable initialization.
Pass-through entry occurs automatically when VIN exceeds 5.4 V, while boost operation maintains regulation via duty-cycle control and synchronous rectification. Overcurrent protection monitors PMOS current and initiates 20 ms fault recovery, and thermal shutdown activates at 150 °C with 20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 5.4 V (±3.7 % over load/temperature), enabling direct NFC transmitter biasing without external regulation. |
| Switching frequency | 3.0 MHz (±3 %), allowing use of ≤1 µH inductors and minimizing EMI filtering requirements. |
| Max output current | 300 mA continuous, supporting typical NFC field generation loads without derating at full ambient range. |
| Efficiency | Up to 94 % at mid-load, reducing thermal dissipation in space-constrained smartphone modules. |
| Enable logic | EN low forces pass-through (VIN = VOUT); EN high enables boost mode-no internal diode drop in pass-through path. |
| Operating temperature | −40 °C to +85 °C ambient, validated for mobile handset deployment with no derating. |
| UVLO threshold | Rising: 2.1 V ±0.2 V; hysteresis: 70–120 mV-ensures clean startup from Li-ion battery discharge profiles. |
Pinout & Package
PCA9412AUKZ 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 arranged in a 3×3 grid. The package supports fine-pitch PCB assembly and minimizes parasitic inductance for high-frequency switching.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A1, A2) | Regulated output node | Direct connection point for output capacitor (≥3 µF at 5.4 V); shortest possible trace required for loop stability. |
| VIN (A3) | Input power supply | Accepts 2.5–5.25 V Li-ion battery source; must be decoupled with ≥2.2 µF capacitor placed adjacent to pin. |
| SW (B1, B2) | Switching node | Connects to external inductor; high dv/dt node requiring minimized trace area to reduce EMI and ringing. |
| EN (B3) | Enable control input | Pull HIGH to enter boost mode; pull LOW to force pass-through; internal 640 kΩ pull-down ensures default off-state. |
| PGND (C1, C2) | Power ground return | Low-impedance return path for inductor current and output capacitor; must connect to ground plane with minimal trace length. |
| AGND (C3) | Analog reference ground | Signal reference for internal bandgap and error amplifier; tied to PGND at single point to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Forced pass-through mode | EN low directly connects VIN to VOUT with negligible voltage drop-enables seamless transition during battery voltage sag without system reset. |
| True load disconnect | Soft-start logic prevents inrush by pre-charging output to VIN −200 mV before enabling boost, eliminating phantom power paths. |
| Integrated thermal protection | Shuts down PMOS at 150 °C junction temperature and auto-restarts only after cooling 20 °C below trip point-prevents latch-up in sealed enclosures. |
| Current-mode control | Enables fast transient response to NFC load steps and stable operation across input voltage and temperature variations. |
| WLCSP9 footprint | 1.24 × 1.24 mm body allows placement under NFC antennas or near RF sections without compromising signal integrity. |
Applications
| Smartphone NFC Power Supply | NFC Payment Terminal |
|---|---|
Use Scenario: Supplies regulated 5.4 V to NFC transceiver ICs in compact smartphone form factors where battery voltage drops below 3.6 V during active transmission. IC Role / Device Role / Timing Role: Step-up converter with forced pass-through mode ensures uninterrupted field generation during deep battery discharge. Use Value: Enables 150 % stronger NFC signal vs. 3.6 V direct drive-or reduces antenna size by 33 %-without increasing board area or thermal load. | Use Scenario: Powers contactless reader modules in handheld POS terminals operating from single-cell Li-ion batteries with variable load profiles. IC Role / Device Role / Timing Role: High-efficiency boost regulator maintaining stable 5.4 V output during burst-mode NFC polling, with automatic pass-through when VIN > 5.4 V. Use Value: Extends terminal runtime per charge by 12–18 % compared to linear regulators, verified across −40 °C to +85 °C operating range. |
| Wearable NFC Tag Reader | IoT Access Control Module |
Use Scenario: Delivers precise 5.4 V to miniature NFC readers embedded in smartwatches and fitness bands with strict height and thermal constraints. IC Role / Device Role / Timing Role: Ultra-compact WLCSP9 DC-DC converter providing regulated output while occupying <1.6 mm² PCB area. Use Value: Allows integration into sub-10 mm thick wearable housings where traditional SOIC or QFN packages would violate mechanical clearance. | Use Scenario: Powers secure element and NFC interface in battery-operated door access controllers deployed in industrial environments. IC Role / Device Role / Timing Role: Robust boost converter with overtemperature and overcurrent protection ensuring reliable operation during repeated card swipe events. Use Value: Eliminates field failures caused by inductor saturation or thermal runaway-validated with 100 % burn-in at 85 °C ambient. |
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 |
|---|---|---|---|
| TPS61291DRVR | Fixed 5.0 V output; 2.5 V–5.5 V input; 400 mA max; 2.5 MHz switching; no forced pass-through mode. | Lacks EN-controlled pass-through-requires external MOSFET for VIN-to-VOUT bypass during battery sag. | Select when fixed 5.0 V suffices and pass-through functionality is implemented externally. |
| MAX17222ELT+T | Adjustable output (2.0 V–5.25 V); 1.8 V–5.5 V input; 300 mA max; 2.5 MHz switching; no pass-through mode. | Requires external feedback resistors; no automatic or forced VIN-to-VOUT conduction path. | Select when output voltage tuning is needed and pass-through is not required for system-level power management. |
Compared with TPS61291DRVR and MAX17222ELT+T, the PCA9412AUKZ uniquely integrates forced pass-through mode via EN pin-eliminating external components for seamless battery-sag handling-while maintaining identical 300 mA capability and WLCSP9 footprint for space-critical NFC designs.
Availability
PCA9412AUKZ is available at Aetrix Electronics and suitable for smartphone NFC subsystems, portable payment terminals, wearable tag readers, and IoT access control modules requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for PCA9412AUKZ 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 PCA9412AUKZ belongs to NXP's ultra-compact DC-DC converter product line designed specifically for NFC antenna power delivery in space- and efficiency-constrained portable electronics.
FAQ
What is the primary function of the PCA9412AUKZ in an NFC system?
The PCA9412AUKZ serves as a high-efficiency step-up DC-DC converter that generates a stable 5.4 V output from a 2.5 V–5.25 V Li-ion battery supply to power NFC transceivers. Its forced pass-through mode-activated by pulling EN low-ensures uninterrupted antenna field strength during battery voltage sag, making it essential for reliable contactless communication in smartphones and terminals. The PCA9412AUKZ achieves this within a 1.24 × 1.24 mm WLCSP9 package optimized for placement beneath NFC antennas.
How does the PCA9412AUKZ differ from the PCA9412UKZ in enable behavior?
The PCA9412AUKZ enters forced pass-through mode (VIN = VOUT) when the EN pin is pulled low, whereas the PCA9412UKZ fully disconnects input from output in the same condition. This functional distinction means the PCA9412AUKZ maintains power continuity to downstream NFC circuitry during low-battery conditions, avoiding system resets. Both parts share identical 3.0 MHz switching, 300 mA rating, and WLCSP9 packaging-but their EN logic responses are mutually exclusive and not interchangeable without firmware or layout changes.
What inductor value is recommended for the PCA9412AUKZ, and why?
A 1 µH inductor is recommended for the PCA9412AUKZ, as specified in the datasheet for optimal performance at 3.0 MHz switching frequency. This value balances size, saturation current (800 mA), and ripple control-supporting the full 300 mA output while enabling use of compact 0603 footprints. Using smaller inductors increases peak current stress and EMI; larger values reduce efficiency and transient response. The PCA9412AUKZ's current-mode control architecture is tuned for 1 µH, and deviation may cause instability or overcurrent faults.
Can the PCA9412AUKZ operate safely at 85 °C ambient temperature?
Yes, the PCA9412AUKZ is rated for continuous operation from −40 °C to +85 °C ambient temperature, with thermal shutdown activating at 150 °C junction temperature and restarting only after cooling 20 °C below that threshold. Its 94 % peak efficiency minimizes self-heating, and the WLCSP9 package's low thermal resistance enables effective heat dissipation in properly designed PCB layouts with adequate copper pour. Validation data confirms stable regulation and protection functionality across the full range without derating-critical for enclosed smartphone and terminal deployments.
What are the critical PCB layout requirements for the PCA9412AUKZ?
Critical PCB layout requirements for the PCA9412AUKZ include placing the output capacitor (≥3 µF at 5.4 V) as close as possible to the VOUT pins (A1/A2) with short, wide traces; routing the SW pins (B1/B2) to the inductor with minimal loop area to suppress ringing; connecting PGND pins (C1/C2) to a solid ground plane using multiple vias; and tying AGND (C3) to PGND at a single point near the IC. The WLCSP9 package demands precise solder paste volume control and reflow profiling per J-STD-020D to prevent voiding or tombstoning-especially given its 0.4 mm pitch and 1.24 mm body size.
PCA9412AUKZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 5.4V
- Voltage - Output (Max):
- 5.56V
- Current - Output:
- 300mA
- 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)
PCA9412AUKZ FAQ
1.How can I place an order for PCA9412AUKZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9412AUKZ 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 PCA9412AUKZ reliable?
The price and inventory of PCA9412AUKZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9412AUKZ is usually 5 days.
3.What payment methods are accepted for PCA9412AUKZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9412AUKZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9412AUKZ?
PCA9412AUKZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9412AUKZ 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 PCA9412AUKZ?
For technical support, including PCA9412AUKZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9412AUKZ requirements.
6.How does Aetrix verify that PCA9412AUKZ is sourced from the original manufacturer or authorized distributors?
All PCA9412AUKZ 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 PCA9412AUKZ meets industry standards.
7.What is the process for return or replacement of PCA9412AUKZ?
All PCA9412AUKZ units undergo pre-shipment inspection (PSI). If there is an issue with PCA9412AUKZ, 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 PCA9412AUKZ part is unused and in its original packaging.
Return procedure for PCA9412AUKZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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