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NXP Semiconductors IP4385CX4/LF,135
- Part No.:
- IP4385CX4/LF,135
- Manufacturer:
- NXP Semiconductors
- Category:
- TVS Diodes
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
IP4385CX4/LF,135.pdf
- Description:
- TVS DIODE 5.5VWM 10VC 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
IP4385CX4/LF,135 from Nexperia is a single-channel integrated ESD protection diode in a 2×2 Wafer Level Chip-Scale Package (WLCSP) with 0.4 mm pitch, rated for ±30 kV contact ESD per IEC 61000-4-2 level 4, 5.5 V reverse standoff voltage (VRWM), and 10 V clamping voltage (VCL) at 1 A surge current. It protects low-voltage USB, charger, and audio interfaces in space-constrained portable electronics.
For engineers reviewing the IP4385CX4/LF,135 datasheet, IP4385CX4/LF,135 pinout, IP4385CX4/LF,135 application, or IP4385CX4/LF,135 equivalent, this device delivers high ESD robustness in ultra-small WLCSP packaging with verified DC polarity protection and low capacitance (450 pF) for signal integrity preservation in 5 V systems.
Technical Context
This device implements a bidirectional ESD protection structure with anode and cathode each connected to two solder balls-enabling symmetrical surge handling and low-inductance grounding via dual-bump terminals. Its clamping behavior is characterized under both forward and reverse 8/20 µs surge pulses (IEC 61000-4-5), with guaranteed VCL ≤10 V at 1 A and IPP = 33 A peak pulse current.
Thermal performance relies on PCB-level heat dissipation: Rth(j-a) = 130 K/W on a 2-layer board, and power dissipation is limited to 0.7 W to prevent solder joint degradation above 50 °C ambient. The device operates across −30 °C to +85 °C and supports Pb-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±30 kV contact discharge (IEC 61000-4-2), exceeding Level 4 by >250% - ensures survivability against real-world human-body model discharges. |
| VRWM | +5.5 V maximum reverse standoff voltage - compatible with 5 V logic and USB 2.0 data lines without leakage-induced signal distortion. |
| VCL @ 1 A | ≤10 V clamping voltage during 8/20 µs surge - limits transient overvoltage to safe levels for downstream 5 V ICs. |
| IPP | 33 A peak pulse current (IEC 61000-4-5) - handles high-energy surges from cable coupling or hot-plug events. |
| Cd | 450 pF diode capacitance at 0 V, 1 MHz - optimized for low-speed interfaces like USB BC1.2 charging detection and audio jack ESD protection. |
| Package | WLCSP4 (2×2 bumps, 0.4 mm pitch), 0.76×0.76×0.61 mm - enables placement directly adjacent to connectors with minimal PCB footprint. |
| IFSM | 11 A non-repetitive forward surge (2 ms pulse) - supports robust wrong-polarity protection during accidental reverse connection of 5 V power rails. |
Pinout & Package
IP4385CX4/LF,135 uses a 4-bump Wafer Level Chip-Scale Package (WLCSP4) with 2×2 solder ball array and 0.4 mm pitch. Dimensions: 0.76 mm × 0.76 mm × 0.61 mm. Index area marks bump A1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 and A2 | cathode | Common cathode terminals - connect to protected signal line(s); dual-bump layout reduces inductance and improves high-frequency ESD response. |
| B1 and B2 | anode | Common anode terminals - connect to system ground; symmetric dual-bump grounding minimizes ground bounce during ESD events. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ESD protection | Single monolithic diode structure eliminates discrete component count and layout complexity for point-of-entry protection. |
| IEC 61000-4-2 compliance | Validated for >30 kV contact discharge - exceeds industrial and consumer ESD immunity requirements without external circuitry. |
| Low clamping voltage | VCL ≤10 V at 1 A ensures protected ICs remain within absolute maximum ratings during surge events. |
| Ultra-compact WLCSP | 0.76 mm × 0.76 mm footprint enables placement directly at connector pads - critical for slim mobile handset designs. |
| DC polarity protection | Forward current clamping <1.1 V at 850 mA - safeguards 5 V power paths from damage due to incorrect cable insertion. |
Applications
| USB Charging Port Protection | Audio Jack ESD Protection |
|---|---|
Use Scenario: Protecting micro-USB or USB-C receptacles in smartphones and tablets from ESD during plug insertion and cable handling. IC Role / Device Role / Timing Role: Primary ESD shunt placed between VBUS, D+, D−, and GND pins - activated within nanoseconds of transient onset. Use Value: Prevents latch-up or gate oxide damage in USB transceivers and PMICs while maintaining 450 pF capacitance compatible with USB 2.0 signaling. |
Use Scenario: Shielding 3.5 mm TRRS audio jacks in wireless earbuds and portable media players from user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional clamping element across left/right/ground/mic lines - suppresses ±30 kV transients before reaching codec or amplifier inputs. Use Value: Eliminates need for four discrete diodes; 0.76 mm × 0.76 mm size allows placement within jack footprint, preserving PCB real estate. |
| Mobile Handset Button Interface | Portable Device Power Input Protection |
Use Scenario: Guarding mechanical volume/power buttons connected to baseband processors in compact handsets. IC Role / Device Role / Timing Role: Low-leakage (≤200 nA at 5 V) ESD clamp on GPIO lines - remains transparent during normal operation but triggers below 7 V breakdown. Use Value: Prevents false button presses or processor resets caused by ESD-induced glitches, with no impact on pull-up/pull-down resistor networks. |
Use Scenario: Safeguarding 5 V input rails of wearables and Bluetooth speakers from misconnected chargers or polarity reversal. IC Role / Device Role / Timing Role: Reverse-polarity protection diode with 11 A IFSM rating - conducts fault current while limiting forward voltage to <1.1 V at 850 mA. Use Value: Enables single-component protection against both ESD and wrong-polarity events, reducing BOM count versus separate TVS + diode solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IP4085CX4/LF/P | Higher VRWM (+14 V), higher VCL (20 V), lower Cd (180 pF), larger package (0.91×0.91 mm) | Better suited for 12 V automotive accessory ports or industrial I/O; less suitable for 5 V USB due to higher clamping. | Select IP4085CX4/LF/P only when protecting >10 V rails where lower capacitance is prioritized over clamping tightness. |
| IP4386CX4/P | VRWM = +14 V, VCL = 20 V, Cd = 160 pF, same WLCSP4 footprint but 0.5 mm pitch | Targeted at 12–14 V systems (e.g., USB PD sink inputs); incompatible pin layout due to 0.5 mm vs. 0.4 mm pitch. | IP4386CX4/P requires PCB redesign - not a drop-in replacement; choose only for higher-voltage applications with layout flexibility. |
Compared with IP4085CX4/LF/P and IP4386CX4/P, IP4385CX4/LF,135 offers the tightest clamping (≤10 V) and optimal 5 V compatibility, making it the preferred choice for consumer USB and audio interfaces where signal integrity and low-voltage robustness are critical.
Availability
IP4385CX4/LF,135 is available at Aetrix Electronics and suitable for USB charging port protection, audio jack ESD shielding, mobile handset button interface hardening, and portable device power input safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for IP4385CX4/LF,135 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
Nexperia is a global leader in high-performance discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division.
The IP438xCX4 family was designed specifically for ultra-compact, high-reliability ESD protection in portable consumer electronics - emphasizing low clamping, small WLCSP form factor, and robust IEC 61000-4-2 compliance.
FAQ
What is the maximum operating temperature range for IP4385CX4/LF,135?
IP4385CX4/LF,135 is specified to operate across an ambient temperature range of −30 °C to +85 °C. Its thermal resistance (Rth(j-a)) is 130 K/W on a 2-layer PCB, and continuous power dissipation must be limited to 0.7 W above 50 °C ambient to ensure solder joint reliability and device lifetime. The storage temperature range extends to −55 °C to +150 °C.
Does IP4385CX4/LF,135 support Pb-free reflow soldering?
Yes, IP4385CX4/LF,135 is qualified for Pb-free reflow with a peak temperature of up to 260 °C (per IEC 61760-1). The recommended profile includes a soak time of 60–180 s, time above 217 °C of 30–150 s, and cooling rate ≤6 °C/s. The device withstands at least three such reflow cycles without degradation.
How does the dual-bump terminal configuration benefit ESD performance in IP4385CX4/LF,135?
The dual-cathode (A1/A2) and dual-anode (B1/B2) bump layout in IP4385CX4/LF,135 reduces parasitic inductance by ~40% compared to single-bump equivalents, enabling faster transient response and lower clamping voltage during nanosecond-scale ESD events. This configuration also improves current sharing and thermal distribution across the WLCSP interface.
Can IP4385CX4/LF,135 be used for reverse polarity protection in 5 V power inputs?
Yes, IP4385CX4/LF,135 provides effective reverse polarity protection: its forward voltage is ≤1.1 V at 850 mA, and it sustains 11 A non-repetitive forward surge (2 ms pulse). When placed in series with a 5 V input, it blocks reverse current while limiting forward conduction loss - validated for use in portable device power entry circuits.
What is the diode capacitance of IP4385CX4/LF,135 and why does it matter?
IP4385CX4/LF,135 has a typical diode capacitance (Cd) of 450 pF at 0 V and 1 MHz. This value is optimized for low-speed interfaces like USB BC1.2 charging detection and analog audio paths - high enough to provide robust ESD shunting, yet low enough to avoid signal attenuation or timing skew in 5 V data lines.
IP4385CX4/LF,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 4-UFBGA, WLCSP
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V (Max)
- Voltage - Breakdown (Min):
- 7V
- Voltage - Clamping (Max) @ Ipp:
- 10V
- Current - Peak Pulse (10/1000µs):
- 33A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 450pF @ 1MHz
- Operating Temperature:
- -35°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.76x0.76)
IP4385CX4/LF,135 FAQ
1.How can I place an order for IP4385CX4/LF,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for IP4385CX4/LF,135 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 IP4385CX4/LF,135 reliable?
The price and inventory of IP4385CX4/LF,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IP4385CX4/LF,135 is usually 5 days.
3.What payment methods are accepted for IP4385CX4/LF,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IP4385CX4/LF,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IP4385CX4/LF,135?
IP4385CX4/LF,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IP4385CX4/LF,135 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 IP4385CX4/LF,135?
For technical support, including IP4385CX4/LF,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IP4385CX4/LF,135 requirements.
6.How does Aetrix verify that IP4385CX4/LF,135 is sourced from the original manufacturer or authorized distributors?
All IP4385CX4/LF,135 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 IP4385CX4/LF,135 meets industry standards.
7.What is the process for return or replacement of IP4385CX4/LF,135?
All IP4385CX4/LF,135 units undergo pre-shipment inspection (PSI). If there is an issue with IP4385CX4/LF,135, 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 IP4385CX4/LF,135 part is unused and in its original packaging.
Return procedure for IP4385CX4/LF,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IP4385CX4/LF,135 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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