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NXP Semiconductors PCA9411UKZ
- Part No.:
- PCA9411UKZ
- Manufacturer:
- NXP Semiconductors
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
PCA9411UKZ.pdf
- Description:
- IC REG BOOST 5.25V 500MA 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,607
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Product details
Overview
PCA9411UKZ from NXP Semiconductors is a 3.0 MHz, 500 mA synchronous step-up DC-DC converter in WLCSP9 package, delivering a fixed 5.25 V output from 2.5–5.25 V input. It features ±3% output voltage accuracy over full load/temperature range, 94% peak efficiency, and integrated pass-through mode for seamless VIN ≥ VOUT operation-optimized for NFC terminals and smartphone power rails.
For engineers reviewing the PCA9411UKZ datasheet, PCA9411UKZ pinout, PCA9411UKZ application, or PCA9411UKZ equivalent, this device requires attention to its EN-controlled total disconnect behavior (vs. PCA9411A's forced pass-through), WLCSP9 thermal layout constraints, soft-start current limiting, and 1 µH inductor compatibility at 3 MHz switching frequency.
Technical Context
The PCA9411UKZ employs a current-mode controller with synchronous rectification, enabling precise regulation and fast transient response. Its dual-stage startup sequence includes inrush control (1 A precharge) followed by boost soft-start, ensuring controlled VOUT ramp from VIN to 5.25 V while enforcing PMOS current limit.
Thermal protection shuts down the integrated PMOS switch at 150 °C with 20 °C hysteresis; overcurrent protection triggers a 20 ms fault timeout before restart. The EN pin enables boost mode when HIGH and forces total input-to-output disconnect when LOW-distinct from the PCA9411A variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.25 V ±3% across full load, input, and temperature range-ensures stable NFC antenna or USB OTG rail without external feedback. |
| Switching Frequency | 3.0 MHz (2.91–3.09 MHz typical)-enables use of compact 1 µH inductors and reduces EMI filtering burden. |
| Peak Efficiency | 94% at mid-load-extends battery runtime in portable devices powered from single-cell Li-ion (2.5–5.25 V). |
| Output Current Limit | 700 mA at VIN = 5.0 V; 400 mA at VIN = 2.5 V-defines maximum sustainable load under worst-case input conditions. |
| Enable Behavior | EN LOW = total input-to-output disconnect (no leakage path); EN HIGH ≥ 500 µs required for reliable initialization. |
| Operating Temperature | −40 °C to +85 °C ambient-validated for smartphone and industrial handheld environments. |
| UVLO Threshold | Rising threshold 2.1 V ±0.2 V with 70–120 mV hysteresis-prevents erratic startup during battery sag. |
Pinout & Package
PCA9411UKZ 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 3×3 grid. Thermal performance relies on proper PCB copper flooding under AGND/PGND and minimal trace inductance on SW/VOUT paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A1, A2) | Regulated output terminal | Direct connection point for output capacitor (≥3 µF at 5.25 V); shortest possible trace to PGND critical for loop stability. |
| VIN (A3) | Main input supply | Accepts 2.5–5.25 V Li-ion source; requires ≥2.2 µF low-ESR input cap placed adjacent to pin. |
| SW (B1, B2) | Switching node | Connects to inductor; high di/dt path demanding minimized loop area and ground plane clearance. |
| EN (B3) | Enable control input | Active-HIGH logic (VIH ≥ 1.16 V); internal 450–800 kΩ pull-down ensures safe default OFF state. |
| PGND (C1, C2) | Power ground return | Primary return for inductor current and output capacitor; must be tied to AGND at single point near IC. |
| AGND (C3) | Analog reference ground | Reference for internal bandgap and error amplifier; flooded ground plane improves noise immunity and regulation accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Pass-Through Mode | Automatic transition to low-impedance VIN→VOUT path when input exceeds 5.25 V-eliminates dropout loss in battery-powered systems. |
| Soft Start with Load Disconnect | True pre-charge and duty-cycle ramping limits inrush current while fully isolating output until regulation is established. |
| Total Input-Output Disconnect | EN LOW physically breaks all conduction paths-<10 µA shutdown current and zero output leakage-critical for NFC RF isolation. |
| Integrated Overcurrent & Thermal Protection | PMOS current sensing and junction temperature monitoring trigger automatic 20 ms fault recovery-no external circuitry needed. |
| High-Frequency Operation | 3 MHz switching allows ultra-small 0603 inductors (e.g., Abracon ASMPH-0603-1R0M-T) and reduces output ripple spectral content. |
Applications
| Smartphone Power Management | NFC Terminal Supply |
|---|---|
Use Scenario: Boosting single-cell Li-ion (2.5–4.2 V) to stable 5.25 V for USB OTG host or camera flash driver. IC Role / Device Role / Timing Role: Primary DC-DC regulator with automatic pass-through during battery top-off phase. Use Value: Eliminates need for discrete diode-or and secondary LDO, reducing BOM count and board space in thin form factors. |
Use Scenario: Providing clean, regulated 5.25 V to NFC transceiver ICs (e.g., PN548) during active communication. IC Role / Device Role / Timing Role: Low-noise, fast-transient power source with EN-controlled isolation to prevent RF coupling during sleep. Use Value: <2 mVpp coherent ripple (100 kHz–1.5 MHz) ensures NFC field integrity and meets EMVCo radiated emission requirements. |
| Portable Medical Sensors | Wearable Biometric Modules |
Use Scenario: Powering optical heart-rate sensors requiring precise 5.25 V bias independent of battery voltage decay. IC Role / Device Role / Timing Role: High-accuracy voltage source with ±3% regulation over −40 °C to +85 °C ambient. Use Value: Maintains sensor LED drive consistency and ADC reference stability across full battery discharge cycle. |
Use Scenario: Delivering regulated 5.25 V to fingerprint sensor ASICs in always-on wearables with tight thermal envelopes. IC Role / Device Role / Timing Role: Thermally robust boost converter with 150 °C shutdown and rapid 20 ms fault recovery. Use Value: Prevents thermal runaway during extended biometric polling while sustaining >480 mA at 3.6 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61291DRVR | Fixed 5.0 V output; 92% peak efficiency; 2.5–5.5 V input; no pass-through mode; 2.5 MHz switching. | Lacks automatic VIN ≥ VOUT pass-through-requires external MOSFET for bypass path in battery-topped systems. | Select when 5.0 V output suffices and pass-through is implemented externally; better suited for cost-sensitive designs without NFC isolation needs. |
| MAX17222ELT+T | Adjustable output (0.6–5.25 V); 95% peak efficiency; 0.4–5.5 V input; 1.2 MHz switching; no EN-controlled disconnect. | Requires external feedback resistors; no true input-output isolation on disable-leakage up to 1 µA persists. | Choose for flexible output voltage tuning and wider input range; avoid where zero-leakage shutdown is mandatory (e.g., NFC RF front-end). |
Compared with TPS61291DRVR and MAX17222ELT+T, the PCA9411UKZ uniquely combines fixed 5.25 V accuracy, EN-triggered total disconnect, and automatic pass-through-making it optimal for NFC and smartphone applications demanding RF isolation and seamless battery-voltage tracking without added components.
Availability
PCA9411UKZ is available at Aetrix Electronics and suitable for smartphone power management, NFC terminal supply, and portable medical sensors requiring stable component supply, long-term lifecycle support, and wafer-level packaging compatibility with high-density PCB layouts.
Supply support for PCA9411UKZ 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 leader focused on secure connectivity solutions for automotive, industrial, and mobile applications, with deep expertise in power management and RF integration.
The PCA9411UKZ belongs to NXP's ultra-compact DC-DC boost converter family designed specifically for space-constrained, battery-powered NFC and mobile interfaces-emphasizing RF isolation, thermal resilience, and seamless voltage-tracking operation.
FAQ
What is the key functional difference between PCA9411UKZ and PCA9411AUKZ?
The PCA9411UKZ enters total input-to-output disconnect when EN is LOW, cutting leakage to <10 µA. In contrast, the PCA9411AUKZ forces pass-through mode (VIN directly to VOUT) when EN is LOW. This makes PCA9411UKZ ideal for NFC applications requiring RF isolation during sleep, while PCA9411AUKZ suits systems needing uninterrupted power path during enable transitions. Both share identical pinout, package, and boost-mode operation.
Does PCA9411UKZ require external compensation components?
No, the PCA9411UKZ integrates full compensation circuitry and operates stably with only two external components: a 1 µH inductor and ≥3 µF output capacitor. Its current-mode architecture and internal error amplifier eliminate the need for external RC networks or feedback dividers-simplifying layout and reducing bill-of-materials for compact designs using PCA9411UKZ.
What is the minimum recommended input capacitance for PCA9411UKZ?
The PCA9411UKZ requires ≥2.2 µF effective input capacitance at the maximum operating voltage (5.25 V). Due to voltage-dependent dielectric behavior, a 10 µF X5R 0402 capacitor (e.g., Samsung CL05A106MQ5NUNC) provides ~2.5 µF at 5 V and is recommended. Placement must be adjacent to VIN and PGND pins to suppress high-frequency transients and ensure reliable startup under dynamic load.
How does PCA9411UKZ handle thermal overload conditions?
When the PCA9411UKZ junction temperature reaches 150 °C, it disables the PMOS power switch and enters thermal shutdown. After cooling by at least 20 °C below shutdown threshold, it automatically restarts from the pre-charge phase-not boost mode-to prevent repeated cycling. This behavior is fully integrated; no external thermal sensor or reset circuitry is needed for robust operation of PCA9411UKZ in thermally dense layouts.
Can PCA9411UKZ operate with input voltages above its nominal 5.25 V output?
Yes-when VIN exceeds 5.25 V, the PCA9411UKZ automatically transitions to Pass-Through Mode, providing a low-impedance path from input to output with minimal voltage drop. This feature eliminates inefficiency and heat generation during battery top-off phases (e.g., 4.35 V–4.4 V charging), and is intrinsic to PCA9411UKZ operation regardless of EN state-enhancing system-level energy efficiency without firmware intervention.
PCA9411UKZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- 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)
PCA9411UKZ FAQ
1.How can I place an order for PCA9411UKZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9411UKZ 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 PCA9411UKZ reliable?
The price and inventory of PCA9411UKZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9411UKZ is usually 5 days.
3.What payment methods are accepted for PCA9411UKZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9411UKZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9411UKZ?
PCA9411UKZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9411UKZ 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 PCA9411UKZ?
For technical support, including PCA9411UKZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9411UKZ requirements.
6.How does Aetrix verify that PCA9411UKZ is sourced from the original manufacturer or authorized distributors?
All PCA9411UKZ 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 PCA9411UKZ meets industry standards.
7.What is the process for return or replacement of PCA9411UKZ?
All PCA9411UKZ units undergo pre-shipment inspection (PSI). If there is an issue with PCA9411UKZ, 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 PCA9411UKZ part is unused and in its original packaging.
Return procedure for PCA9411UKZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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