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NXP Semiconductors LD6816CX4/C20P,315
- Part No.:
- LD6816CX4/C20P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
LD6816CX4/C20P,315.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
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Product details
Overview
LD6816CX4/C20P,315 from NXP Semiconductors is a 2.0 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package with auto-discharge (pull-down) functionality. It delivers 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and 55 dB PSRR at 1 kHz, enabling stable power for noise-sensitive analog circuits in space-constrained mobile devices.
For engineers reviewing the LD6816CX4/C20P,315 datasheet, LD6816CX4/C20P,315 pinout, LD6816CX4/C20P,315 application, or LD6816CX4/C20P,315 equivalent, key selection criteria include its 2.0 V output accuracy (±2% over temperature), sub-1 µA shutdown quiescent current, 150 µs startup time, and integrated thermal/overcurrent protection - all critical for battery-powered portable electronics requiring rapid enable/disable control and low-noise rail generation.
Technical Context
The LD6816CX4/C20P,315 uses a PMOS pass transistor architecture to achieve ultra-low dropout, enabling operation with input as low as 2.3 V while maintaining regulated 2.0 V output. Its internal reference and error amplifier ensure tight line/load regulation (±0.1 %/V and 0.0025 %/mA respectively) across −40 °C to +85 °C ambient.
Unlike high-ohmic disable variants, this part integrates a dedicated pull-down transistor (Rpd = 100 Ω typical) that actively discharges the output during shutdown, preventing floating nodes and ensuring fast, controlled power-down in multi-rail systems - a requirement in smartphones and portable media players with sequenced power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±2% over −40 °C to +85 °C; enables direct replacement of legacy 2.0 V logic or analog supply rails without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA; allows operation with only 2.045 V input, maximizing battery runtime in single-cell Li-ion (2.7–4.2 V) or coin-cell applications. |
| Quiescent Current | 0.1 µA typical in shutdown (EN ≤ 0.4 V); reduces standby leakage in always-on subsystems such as real-time clocks or sensor hubs. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); meets low-noise requirements for ADC references, RF biasing, and audio codec supplies. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters, improving signal integrity in mixed-signal SoC power domains. |
| Startup Time | <150 µs to 95% of 2.0 V; supports fast wake-up sequences in responsive user interfaces and low-latency peripheral power management. |
| Enable Threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V and 3.3 V GPIOs without level-shifting, simplifying host controller interface. |
Pinout & Package
LD6816CX4/C20P,315 is housed in 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 (per Table 5 and Figure 25). The package is Pb-free, RoHS-compliant, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Supply ground reference | Primary return path for regulator current; must connect to solid ground plane to minimize noise and ensure thermal performance. |
| EN (A2) | Active-HIGH enable input | Drives internal pass transistor; logic HIGH ≥1.1 V enables regulation; logic LOW ≤0.4 V disables output and activates pull-down. |
| OUT (B1) | Regulated 2.0 V output | Supplies load; requires ≥1.0 µF X7R ceramic capacitor (ESR 5–500 mΩ) for stability and optimal transient response. |
| IN (B2) | Input voltage supply | Accepts 2.3–5.5 V; must be decoupled near the pin with low-ESR capacitor to maintain PSRR and prevent oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor actively discharges OUT during disable, eliminating need for external bleed resistors and reducing system-level power-down latency. |
| Ultra-low noise output | 30 µVRMS noise (10 Hz–100 kHz) enables clean power for precision analog blocks without additional filtering stages. |
| High PSRR at low frequency | 55 dB rejection at 1 kHz suppresses ripple from buck converter switching frequencies and their harmonics, preserving signal fidelity. |
| Thermal and overcurrent protection | Shuts down at 160 °C junction temperature with 20 K hysteresis; limits peak output current to 300 mA and short-circuit current to 600 mA - prevents damage during fault conditions. |
| Low-temperature coefficient | Output voltage drift ≤±3% over −40 °C to +85 °C ambient ensures consistent performance across environmental operating ranges. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplies 2.0 V to baseband processor I/O banks and memory interfaces in compact smartphone designs. IC Role / Device Role / Timing Role: Low-noise, fast-startup LDO providing clean, sequenced power to voltage-sensitive digital logic during boot and sleep/wake transitions. Use Value: Auto-discharge prevents bus contention during power sequencing; 45 mV dropout extends usable battery range by ~150 mV compared to standard LDOs. |
Use Scenario: Powers CMOS image sensor analog front-end and ADC reference in ultra-thin digital still cameras. IC Role / Device Role / Timing Role: Ultra-low-noise 2.0 V regulator delivering stable bias under dynamic load changes during image capture bursts. Use Value: 30 µVRMS noise minimizes fixed-pattern noise in captured images; 150 µs startup enables rapid frame-rate switching. |
| Portable Media Player Audio Codec | GPS Module RF Front-End |
Use Scenario: Provides 2.0 V supply to stereo audio DAC and headphone amplifier in battery-powered media players. IC Role / Device Role / Timing Role: Low-ripple, low-quiescent-current LDO supporting playback and standby modes with minimal battery drain. Use Value: 0.1 µA shutdown current preserves battery life during extended idle periods; 55 dB PSRR isolates audio path from noisy system rails. |
Use Scenario: Supplies 2.0 V to GPS receiver LNA and downconverter in personal navigation devices. IC Role / Device Role / Timing Role: High-PSRR, thermally robust LDO delivering interference-free bias under varying thermal loads and antenna coupling conditions. Use Value: Integrated thermal protection prevents gain drift or failure during sustained GPS acquisition; 2.3 V minimum input supports operation down to depleted battery states. |
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 (typ), no auto-discharge; SOT-25 package (2.9 × 2.8 mm). | Lacks active pull-down; requires external discharge resistor for controlled shutdown; larger footprint limits use in ultra-compact designs. | Select when board area is not constrained and auto-discharge is unnecessary; verify thermal derating for same PCB layout. |
| Richtek RT9013-20PB | 2.0 V fixed output, 250 mA, 250 mV dropout (typ), 50 µVRMS noise, no auto-discharge; DFN-4 (1.0 × 1.0 mm). | Higher dropout reduces usable input range; higher noise degrades SNR in precision analog paths; no integrated pull-down. | Choose only if higher output current (250 mA) is required and noise/PSRR specs are relaxed; confirm compatibility with 0.4 mm pitch assembly. |
Compared with XC6219B202MR-G and RT9013-20PB, LD6816CX4/C20P,315 uniquely combines ultra-low dropout (45 mV), low noise (30 µVRMS), and integrated auto-discharge in a 0.76 mm × 0.76 mm WLCSP - making it optimal for miniaturized, battery-sensitive applications where power sequencing and noise performance are non-negotiable.
Availability
LD6816CX4/C20P,315 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor bias, portable media player audio codec, GPS module RF front-end, and other portable electronics requiring stable component supply with high reliability and long-term availability.
Supply support for LD6816CX4/C20P,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 portable electronics requiring ultra-low-noise, ultra-low-dropout regulation with fast enable/disable control - targeting next-generation smartphones, wearables, and IoT edge sensors where board space and battery efficiency are paramount.
FAQ
What is the nominal output voltage and tolerance of the LD6816CX4/C20P,315?
The LD6816CX4/C20P,315 provides a fixed 2.0 V output with ±2% tolerance over the full operating temperature range (−40 °C to +85 °C) and load (1 mA to 150 mA). This specification is verified per Table 9 in the NXP datasheet and ensures compatibility with 2.0 V I/O standards without external trimming components.
Does the LD6816CX4/C20P,315 include auto-discharge functionality, and how does it operate?
Yes, the LD6816CX4/C20P,315 includes an integrated pull-down transistor that activates when the EN pin is driven LOW (≤0.4 V), pulling the OUT pin to GND via a typical 100 Ω resistance. This auto-discharge function eliminates floating outputs and accelerates power-down - a key feature distinguishing it from H-variant LD6816 parts.
What is the recommended output capacitor for stable operation of the LD6816CX4/C20P,315?
The LD6816CX4/C20P,315 requires a minimum 1.0 µF X7R ceramic capacitor at the OUT pin, with ESR between 5 mΩ and 500 mΩ. The capacitor must meet ±30% tolerance over −40 °C to +125 °C and be placed as close as possible to the device to ensure stability and optimal transient response per Section 10.1 of the datasheet.
How does the LD6816CX4/C20P,315 perform under thermal stress, and what protection mechanisms are built-in?
The LD6816CX4/C20P,315 incorporates over-temperature protection that shuts down regulation at 160 °C junction temperature, with 20 K hysteresis for safe restart. Thermal resistance Rth(j-a) is 130 K/W on a two-layer PCB. These features prevent permanent damage during sustained overload or poor heatsinking - critical for sealed portable enclosures.
Can the LD6816CX4/C20P,315 be used with a 1.8 V GPIO for enable control?
Yes, the LD6816CX4/C20P,315 accepts 1.8 V logic directly on the EN pin: its VIH threshold is 1.1 V (min), well below 1.8 V, and VIL is 0.4 V (max), ensuring reliable recognition of LOW state. No level shifter is needed, simplifying interface design with modern low-voltage microcontrollers and application processors.
LD6816CX4/C20P,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):
- 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/C20P,315 FAQ
1.How can I place an order for LD6816CX4/C20P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/C20P,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/C20P,315 reliable?
The price and inventory of LD6816CX4/C20P,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/C20P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/C20P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/C20P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/C20P,315?
LD6816CX4/C20P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/C20P,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/C20P,315?
For technical support, including LD6816CX4/C20P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/C20P,315 requirements.
6.How does Aetrix verify that LD6816CX4/C20P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/C20P,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/C20P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/C20P,315?
All LD6816CX4/C20P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/C20P,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/C20P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/C20P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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