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NXP Semiconductors LD6816CX4/C22P,315
- Part No.:
- LD6816CX4/C22P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
LD6816CX4/C22P,315.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:36,000
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Product details
Overview
LD6816CX4/C22P,315 from NXP Semiconductors is a 2.2 V fixed-output, 150 mA ultra-low-dropout linear regulator in a 0.4 mm pitch WLCSP4 package, featuring 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and auto-discharge functionality via integrated pull-down transistor. It operates from 2.3 V to 5.5 V input and delivers stable power to noise-sensitive analog/digital cores in portable electronics.
For engineers reviewing the LD6816CX4/C22P,315 datasheet, LD6816CX4/C22P,315 pinout, LD6816CX4/C22P,315 application, or LD6816CX4/C22P,315 equivalent, key selection criteria include its 2.2 V fixed output, sub-100 mV dropout performance, 55 dB PSRR at 1 kHz, shutdown quiescent current of 0.1 µA, and WLCSP4 footprint compatibility with high-density mobile PCB layouts.
Technical Context
The LD6816CX4/C22P,315 integrates a precision voltage reference, error amplifier, and PMOS pass transistor optimized for minimal dropout and low-noise regulation. Its enable input (active HIGH) controls both regulation and the internal 100 Ω pull-down switch that actively discharges the output during disable-critical for fast power-state transitions in battery-powered systems.
This device implements over-temperature shutdown (160 °C trip, 20 K hysteresis) and output current limiting (600 mA short-circuit protection), with thermal resistance Rth(j-a) = 130 K/W on standard two-layer PCBs. Its 1.0 µF minimum output capacitance requirement supports rapid start-up (<150 µs) and stable transient response across –40 °C to +85 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.2 V ±3 % over –40 °C to +85 °C; enables direct powering of 2.2 V I/O domains without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA load; allows operation with VIN as low as 2.245 V, maximizing battery runtime in single-cell Li-ion or Li-poly systems. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); meets stringent noise requirements for RF transceivers, ADC references, and audio codecs. |
| Quiescent Current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes leakage current in always-on subsystems like real-time clocks or wake-on-event circuits. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V and 3.3 V GPIO logic without level-shifting. |
| Pull-down Resistance | 100 Ω typical; ensures rapid discharge of 1 µF output capacitor in ≤300 µs, enabling clean power sequencing in multi-rail systems. |
Pinout & Package
LD6816CX4/C22P,315 uses a 0.76 mm × 0.76 mm × 0.47 mm Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm bump pitch and backside coating for enhanced mechanical robustness and moisture resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Supply ground reference | Primary return path for regulator current; must connect to solid ground plane for thermal and noise performance. |
| EN (A2) | Active-HIGH enable input | Controls LDO operation and activates internal pull-down transistor when LOW; no external pull-up required. |
| OUT (B1) | Regulated output voltage | Delivers 2.2 V to load; requires ≥0.7 µF X7R ceramic capacitor with ESR 5–500 mΩ for stability. |
| IN (B2) | Input voltage supply | Accepts 2.3–5.5 V; decoupling capacitor recommended close to pin to minimize input impedance at high frequencies. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor actively discharges OUT during disable-eliminates need for external bleed resistors in power-gated domains. |
| Ultra-low noise regulation | 30 µVRMS output noise enables use in sensitive analog signal chains without additional filtering stages. |
| Fast transient response | 150 µs start-up time and 300 µs shutdown time support dynamic power management in mobile SoC subsystems. |
| Robust protection suite | Includes over-temperature shutdown (160 °C), current limiting (600 mA), and 10 kV HBM ESD rating-reduces system-level protection component count. |
| Miniaturized WLCSP4 package | 0.76 mm × 0.76 mm footprint saves >70 % board area vs. SOT-23 alternatives-ideal for space-constrained smartphones and wearables. |
Applications
| Smartphone Application Processor Core | Digital Still Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powering 2.2 V I/O rails of application processors during active and low-power states. IC Role / Device Role / Timing Role: Primary low-noise, fast-response LDO supplying core logic voltage with auto-discharge for clean state transitions. Use Value: Enables sub-150 µs wake-up from deep sleep while maintaining <±3 % output accuracy across temperature and load variation. |
Use Scenario: Providing clean bias to CMOS image sensor analog front-end circuits. IC Role / Device Role / Timing Role: Low-noise voltage source isolating sensor analog section from noisy digital supply domains. Use Value: 30 µVRMS noise and 55 dB PSRR prevent switching artifacts from degrading image SNR in low-light capture. |
| Portable Media Player Audio DAC | Personal Navigation Device GPS RF Front-End |
|
Use Scenario: Supplying reference voltage to stereo audio DACs requiring ultra-stable, low-ripple power. IC Role / Device Role / Timing Role: Precision LDO delivering regulated 2.2 V with minimal added noise to DAC analog supply pins. Use Value: Achieves >105 dB THD+N by eliminating power-supply-induced distortion in high-fidelity playback. |
Use Scenario: Powering GPS LNA and mixer stages in compact GNSS modules. IC Role / Device Role / Timing Role: Low-dropout regulator maintaining 2.2 V under varying battery voltage (3.0–4.2 V) during satellite acquisition. Use Value: 45 mV dropout ensures continuous operation down to 2.245 V input-extending usable battery range by ~8 % vs. 200 mV-dropout alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B222MR-G | 2.2 V fixed output, 150 mA, 65 mV dropout (typ), no auto-discharge, SOT-25 package (2.9 mm × 2.8 mm). | Larger footprint; lacks active output discharge-requires external circuitry for fast power-down sequencing. | Select when board space permits larger package and auto-discharge is not required. |
| Richtek RT9013-22GB | 2.2 V fixed output, 300 mA, 250 mV dropout (typ), 50 µVRMS noise, SOT-23-5 package. | Higher dropout and noise; higher current rating but lower efficiency in low-VIN scenarios. | Select when higher output current is needed and 250 mV dropout is acceptable in system VIN margin. |
Compared with XC6219B222MR-G and RT9013-22GB, LD6816CX4/C22P,315 offers superior dropout (45 mV), lower noise (30 µVRMS), and integrated auto-discharge in a 0.76 mm × 0.76 mm WLCSP-making it optimal for miniaturized, battery-sensitive designs demanding fast, clean power control.
Availability
LD6816CX4/C22P,315 is available at Aetrix Electronics and suitable for smartphone application processors, digital camera image sensors, portable media player audio DACs, personal navigation device GPS front-ends, and cordless telephone baseband ICs requiring stable component supply and long-term production continuity.
Supply support for LD6816CX4/C22P,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 electronics, with leadership in power management, RF, and microcontroller technologies.
The LD6816 series was designed specifically for ultra-miniaturized portable devices requiring ultra-low-noise, low-dropout regulation with fast enable/disable control-targeting next-generation smartphones, wearables, and IoT edge sensors.
FAQ
What is the nominal output voltage of the LD6816CX4/C22P,315?
The LD6816CX4/C22P,315 provides a fixed 2.2 V nominal output voltage with ±3 % tolerance over –40 °C to +85 °C ambient temperature and 1 mA to 150 mA load current. This value is laser-marked as "K" on the WLCSP4 package per Table 13 and confirmed in Table 5 of the datasheet.
Does the LD6816CX4/C22P,315 include an auto-discharge function?
Yes, the LD6816CX4/C22P,315 includes an integrated pull-down transistor that provides a low-ohmic output state (100 Ω typical) when disabled, enabling active discharge of the output capacitor. This feature is inherent to the "CxxP" suffix and distinguishes it from "xxH" variants which enter high-ohmic state.
What is the minimum output capacitance required for stable operation of the LD6816CX4/C22P,315?
The LD6816CX4/C22P,315 requires a minimum external output capacitance of 0.7 µF, with a recommended value of 1.0 µF X7R ceramic capacitor. The capacitor must have ESR between 5 mΩ and 500 mΩ to ensure loop stability and meet transient response specifications per Table 10.
What is the thermal resistance (Rth(j-a)) of the LD6816CX4/C22P,315 under standard conditions?
The typical junction-to-ambient thermal resistance (Rth(j-a)) of the LD6816CX4/C22P,315 is 130 K/W when mounted on a standard two-layer PCB per Table 8. Effective thermal performance depends on copper pour area and via placement-solid GND connections to all pins are essential to achieve this rating.
Is the LD6816CX4/C22P,315 RoHS-compliant and halogen-free?
Yes, the LD6816CX4/C22P,315 is Pb-free, RoHS-compliant, and free of halogen and antimony-meeting NXP's "dark green compliant" standard as stated in Section 1.2. It conforms to JEDEC J-STD-020C moisture sensitivity level (MSL) requirements for reflow soldering.
LD6816CX4/C22P,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- LD6816
- Package/Case:
- 4-UFBGA, WLCSP
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.2V
- 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/C22P,315 FAQ
1.How can I place an order for LD6816CX4/C22P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/C22P,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/C22P,315 reliable?
The price and inventory of LD6816CX4/C22P,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/C22P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/C22P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/C22P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/C22P,315?
LD6816CX4/C22P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/C22P,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/C22P,315?
For technical support, including LD6816CX4/C22P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/C22P,315 requirements.
6.How does Aetrix verify that LD6816CX4/C22P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/C22P,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/C22P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/C22P,315?
All LD6816CX4/C22P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/C22P,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/C22P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/C22P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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