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NXP Semiconductors LD6816CX4/20P,315
- Part No.:
- LD6816CX4/20P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6816CX4/20P,315.pdf
- Description:
- IC REG LINEAR 2V 150MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
LD6816CX4/20P,315 from NXP Semiconductors is a 2.0 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package, featuring 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and integrated auto-discharge pull-down transistor for rapid output discharge during disable. It operates from 2.3 V to 5.5 V input and targets power-sensitive portable applications including smartphone baseband ICs and camera sensor rails.
For engineers reviewing the LD6816CX4/20P,315 datasheet, LD6816CX4/20P,315 pinout, LD6816CX4/20P,315 application, or LD6816CX4/20P,315 equivalent, key selection criteria include its 2.0 V fixed output, 0.76 mm × 0.76 mm WLCSP footprint, active-HIGH enable interface, 55 dB PSRR at 1 kHz, and guaranteed thermal shutdown at 160 °C with 20 K hysteresis.
Technical Context
The LD6816CX4/20P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout performance and stable operation with only 1.0 µF ceramic output capacitance. Its internal bandgap reference, error amplifier, and overtemperature/overcurrent protection circuitry are monolithically integrated in silicon.
This variant belongs to the "P" suffix family, meaning it integrates a dedicated pull-down switching transistor on the OUT pin-ensuring low-ohmic discharge (typ. 100 Ω) when disabled-unlike "H" variants that enter high-impedance state. Enable threshold is defined by VIH ≥ 1.1 V and VIL ≤ 0.4 V, independent of input voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±2% over −40 °C to +85 °C ambient; ensures stable core supply for 2.0 V logic domains without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA load; enables regulation down to VIN = 2.045 V, maximizing battery runtime in single-cell Li-ion systems. |
| PSRR | 55 dB at 1 kHz; suppresses ripple from noisy DC-DC converters feeding the LDO input, critical for analog sensor or RF subsystems. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); low enough for powering precision ADC references or low-noise amplifiers without additional filtering. |
| Quiescent Current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes leakage current in always-on system standby modes. |
| Enable Threshold | VIL ≤ 0.4 V / VIH ≥ 1.1 V; compatible with 1.8 V and higher GPIOs without level-shifting, simplifying host control interface. |
| Thermal Protection | Shuts down at 160 °C junction temperature with 20 K hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
LD6816CX4/20P,315 uses a 0.4 mm pitch Wafer-Level Chip-Scale Package (WLCSP4) measuring 0.76 mm × 0.76 mm × 0.47 mm, with four solder bumps arranged in a 2×2 array and index area marking bump A1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Supply ground reference | Primary return path for load current and internal bias; must connect to low-impedance ground plane for noise and thermal performance. |
| EN (A2) | Active-HIGH enable input | Controls regulator operation: logic HIGH ≥ 1.1 V enables output; logic LOW ≤ 0.4 V disables output and activates pull-down transistor. |
| OUT (B1) | Regulated output voltage | Delivers 2.0 V to load; features integrated 100 Ω pull-down switch to discharge external capacitance rapidly upon disable. |
| IN (B2) | Input voltage supply | Accepts 2.3 V–5.5 V; requires local 1.0 µF X7R ceramic capacitor with ESR 5–500 mΩ for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor on OUT pin ensures rapid discharge of output capacitance (<300 µs to 5% VO) when disabled-critical for safe power sequencing in multi-rail systems. |
| Ultra-low noise regulation | 30 µVRMS output noise over 10 Hz–100 kHz enables direct powering of noise-sensitive analog blocks (e.g., PLLs, audio codecs) without post-LDO filtering. |
| High PSRR at low frequency | 55 dB rejection at 1 kHz allows clean 2.0 V rail generation from switched-mode supplies operating near audio or IF bands without added LC filtering. |
| Miniaturized WLCSP packaging | 0.76 mm × 0.76 mm footprint with 0.4 mm bump pitch supports ultra-dense PCB layouts in smartphones and wearables where board space is constrained. |
| Robust protection suite | Includes overtemperature shutdown (160 °C), output current limiting (~600 mA short-circuit), and 10 kV HBM ESD rating-reducing need for external protection components. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Rail |
|---|---|
Use Scenario: Supplying 2.0 V to LTE/5G baseband processor I/O banks during active transmission bursts with tight voltage tolerance. IC Role / Device Role / Timing Role: Primary low-noise, fast-transient LDO delivering regulated 2.0 V from shared PMIC intermediate rail. Use Value: 45 mV dropout preserves headroom across battery discharge curve; 150 µs startup ensures timely power-up before RF calibration sequences. |
Use Scenario: Powering CMOS image sensor analog front-end requiring stable 2.0 V with minimal switching noise coupling. IC Role / Device Role / Timing Role: Dedicated low-noise LDO decoupling sensor analog supply from noisy digital domain. Use Value: 30 µVRMS noise and 55 dB PSRR prevent image artifacts (e.g., banding, fixed-pattern noise) caused by supply ripple. |
| Portable Media Player Audio Codec | Wearable Health Monitor Analog Front-End |
Use Scenario: Providing clean 2.0 V bias to stereo DAC and headphone amplifier in battery-powered media players. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating audio stage from main system DC-DC converter. Use Value: Ultra-low 30 µVRMS noise directly improves SNR and THD+N performance without adding ferrite beads or RC filters. |
Use Scenario: Powering ECG/PPG analog signal chain (op-amps, ADC drivers) in compact wearable patches with strict size constraints. IC Role / Device Role / Timing Role: Miniaturized 2.0 V LDO enabling direct integration into sensor module PCB with minimal footprint. Use Value: 0.76 mm × 0.76 mm WLCSP4 package saves >70% board area vs. SOT-23 alternatives while maintaining full protection and performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B202MR-G | 2.0 V fixed output, 150 mA, 65 mV dropout (at 100 mA), no integrated pull-down; SOT-25 package (2.9 mm × 2.8 mm). | Lacks auto-discharge; requires external pulldown resistor for controlled shutdown discharge. | Choose when board space permits larger package and discharge timing is non-critical. |
| Richtek RT9013-20GB | 2.0 V fixed output, 300 mA, 250 mV dropout (at 300 mA), 45 µVRMS noise, WLCSP-4 (0.8 mm × 0.8 mm). | Higher dropout and noise; larger footprint; no integrated pull-down transistor. | Choose only if higher output current (300 mA) is required and discharge control is handled externally. |
Compared with XC6219B202MR-G and RT9013-20GB, LD6816CX4/20P,315 uniquely combines 2.0 V regulation, ultra-low 45 mV dropout, 30 µVRMS noise, and integrated auto-discharge in the smallest 0.76 mm × 0.76 mm WLCSP4 package-making it optimal for space-constrained, noise-sensitive, and fast-sequencing portable designs.
Availability
LD6816CX4/20P,315 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor rails, portable media player audio codecs, and wearable health monitor analog front-ends requiring stable component supply with guaranteed long-term availability.
Supply support for LD6816CX4/20P,315 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 consumer applications, with leadership in power management, RF, and embedded processing.
The LD6816 series was designed specifically for ultra-miniaturized, low-noise, and fast-sequencing power delivery in portable electronics-emphasizing wafer-level packaging, sub-50 mV dropout, and integrated functional safety features like thermal shutdown and current limiting.
FAQ
What is the nominal output voltage of the LD6816CX4/20P,315?
The LD6816CX4/20P,315 delivers a fixed 2.0 V output voltage with ±2% accuracy over −40 °C to +85 °C ambient temperature and 1 mA to 150 mA load current. This value is laser-marked as "I" on the WLCSP4 package per Table 12 and confirmed in Table 4 of the datasheet.
Does the LD6816CX4/20P,315 include an auto-discharge function?
Yes, the LD6816CX4/20P,315 includes an integrated pull-down transistor on the OUT pin, providing low-ohmic discharge (typ. 100 Ω) when disabled. This feature is inherent to all "P" suffix variants-including LD6816CX4/20P,315-and enables rapid output voltage decay (<300 µs to 5% VO) during shutdown.
What package type and dimensions does the LD6816CX4/20P,315 use?
The LD6816CX4/20P,315 uses a Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm bump pitch, measuring 0.76 mm × 0.76 mm × 0.47 mm overall. Pin layout is 2×2 bump array with index area marking bump A1, as shown in Figure 1 and Table 14.
What is the recommended output capacitor for stable operation of the LD6816CX4/20P,315?
The LD6816CX4/20P,315 requires a minimum 0.7 µF ceramic output capacitor (X7R dielectric preferred), with 1.0 µF recommended. Capacitor ESR must be between 5 mΩ and 500 mΩ. This ensures stability, meets transient response requirements, and controls shutdown time per Section 10.1 and Table 10.
How does the enable pin (EN) interface work on the LD6816CX4/20P,315?
The EN pin of the LD6816CX4/20P,315 is active-HIGH: applying ≥1.1 V enables regulation, while ≤0.4 V disables it and activates the internal pull-down transistor. The threshold is independent of input voltage, allowing direct interfacing with 1.8 V, 2.5 V, or 3.3 V GPIOs without level shifters.
LD6816CX4/20P,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.075V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 250 µA
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Transient Voltage
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.76x0.76)
LD6816CX4/20P,315 FAQ
1.How can I place an order for LD6816CX4/20P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/20P,315 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 LD6816CX4/20P,315 reliable?
The price and inventory of LD6816CX4/20P,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6816CX4/20P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/20P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/20P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/20P,315?
LD6816CX4/20P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/20P,315 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 LD6816CX4/20P,315?
For technical support, including LD6816CX4/20P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/20P,315 requirements.
6.How does Aetrix verify that LD6816CX4/20P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/20P,315 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 LD6816CX4/20P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/20P,315?
All LD6816CX4/20P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/20P,315, 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 LD6816CX4/20P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/20P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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