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NXP Semiconductors LD6816CX4/33H,315
- Part No.:
- LD6816CX4/33H,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6816CX4/33H,315.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:882,000
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Product details
Overview
LD6816CX4/33H,315 from NXP Semiconductors is a 3.3 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package (0.76 mm × 0.76 mm × 0.47 mm), featuring 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and high-ohmic (3-state) output during disable-designed for power-sensitive mobile interfaces in smartphones and portable media players.
For engineers reviewing the LD6816CX4/33H,315 datasheet, LD6816CX4/33H,315 pinout, LD6816CX4/33H,315 application, or LD6816CX4/33H,315 equivalent, key selection criteria include its 2.3–5.5 V input range, 55 dB PSRR at 1 kHz, <150 µs startup time, thermal shutdown at 160 °C, and RoHS-compliant Pb-free WLCSP construction with 10 kV HBM ESD protection.
Technical Context
The LD6816CX4/33H,315 implements a PMOS pass transistor architecture enabling ultra-low dropout operation, with internal voltage reference, error amplifier, and overtemperature/overcurrent protection circuitry. Its enable input (EN) is active-HIGH with VIH ≥ 1.1 V and VIL ≤ 0.4 V, independent of input voltage.
Unlike P- or CxxP variants, this H-suffix device enters a high-impedance state at OUT when disabled-eliminating automatic discharge but minimizing standby current leakage. It requires a minimum 0.7 µF X7R ceramic output capacitor (1.0 µF typical) with 5–500 mΩ ESR for stability and controlled shutdown behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over −40 °C to +85 °C ambient; ensures stable core/peripheral rail for 3.3 V logic without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA load; enables regulation down to VIN = 3.345 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, critical for analog sensor or RF subsystem power integrity. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); low-noise performance supports noise-sensitive ADCs, audio codecs, and PLL power domains. |
| Quiescent Current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); reduces system-level standby power in always-on mobile applications. |
| Startup Time | <150 µs to 95% of 3.3 V; enables fast power sequencing in multi-rail processors and FPGA I/O banks. |
| Thermal Protection | Shuts down at 160 °C junction temperature with 20 K hysteresis; prevents thermal runaway during transient overload or poor PCB heatsinking. |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP4), 0.4 mm pitch, 2×2 bump array, dimensions 0.76 mm × 0.76 mm × 0.47 mm, Pb-free and halogen-free (dark green compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Supply ground reference | Primary return path for regulator current; must connect to solid ground plane for optimal noise and thermal performance. |
| EN (A2) | Enable control input | Active-HIGH digital control; drives internal pass transistor-pull LOW to enter high-Z shutdown mode with <1 µA supply current. |
| OUT (B1) | Regulated output voltage | 3.3 V output node; high-ohmic (3-state) when disabled-requires external pull-down if defined low state needed during sleep. |
| IN (B2) | Input voltage supply | Accepts 2.3–5.5 V; must be decoupled locally with ≥1 µF ceramic capacitor to minimize input ripple and ensure PSRR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 45 mV @ 150 mA enables efficient regulation from weak or deeply discharged batteries. |
| Low-noise output | 30 µVRMS noise supports precision analog circuits without additional filtering stages. |
| Fast transient response | <150 µs startup and controlled load step recovery maintain stable voltage during processor wake-up events. |
| High PSRR | 55 dB at 1 kHz rejects noise from noisy switchers, reducing need for bulky input LC filters. |
| Robust protection | Integrated overtemperature shutdown (160 °C), current limiting, and 10 kV HBM ESD safeguard reliability in handheld environments. |
Applications
| Smartphone Core Power | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Supplying 3.3 V bias to CMOS image sensor analog front-end and timing controller in compact smartphone modules. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO delivering clean 3.3 V rail independent of main SoC power domain fluctuations. Use Value: Prevents image noise and banding by rejecting DC-DC ripple and maintaining voltage accuracy within ±2% across temperature and load. |
Use Scenario: Powering high-speed serial interface (e.g., MIPI CSI-2) and pixel clock circuitry in DSLR and mirrorless camera bodies. IC Role / Device Role / Timing Role: Stable 3.3 V source with sub-150 µs startup enabling rapid camera wake-from-sleep and burst capture readiness. Use Value: Ensures deterministic timing margin for high-speed data lanes by eliminating voltage droop during interface activation. |
| Portable Media Player Audio | GPS Module RF Front-End |
|
Use Scenario: Providing regulated 3.3 V to DAC, headphone amplifier, and audio codec in battery-powered MP3/Bluetooth players. IC Role / Device Role / Timing Role: Ultra-low-noise LDO isolating sensitive audio signal chain from noisy digital subsystems. Use Value: Achieves >95 dB SNR by contributing only 30 µVRMS noise-no additional ferrite beads or LC filters required. |
Use Scenario: Supplying 3.3 V to GPS/GNSS RF front-end ICs (LNA, mixer, VCO) in wearable navigation devices. IC Role / Device Role / Timing Role: High-PSRR, low-dropout regulator rejecting switching noise from PMU while sustaining tight voltage tolerance. Use Value: Improves GPS sensitivity by >2 dB through reduced phase noise on VCO supply, directly enhancing acquisition time and tracking stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B332MR-G | 3.3 V fixed, 150 mA, 65 mV dropout (typ), SOT-25 package (2.9 mm × 2.8 mm), no enable pin | Larger footprint; lacks EN control and high-Z shutdown-requires external MOSFET for power gating | Select when board space allows larger package and enable functionality is unnecessary. |
| Ricoh RP114K331D-TR-F | 3.3 V fixed, 150 mA, 55 mV dropout (typ), DFN1006-4 (1.0 mm × 0.6 mm), active-HIGH EN, 0.5 µA shutdown current | Smaller footprint than WLCSP but higher dropout; lower shutdown current but no 10 kV HBM rating | Select when minimal board area is critical and 10 kV ESD is not required in end-use environment. |
Compared with LD6816CX4/33H,315, the XC6219B332MR-G trades miniaturization and enable control for cost and simplicity, while the RP114K331D-TR-F offers smaller size but sacrifices ESD robustness and ultra-low dropout-making LD6816CX4/33H,315 optimal for space-constrained, high-reliability mobile designs demanding both performance and ruggedness.
Availability
LD6816CX4/33H,315 is available at Aetrix Electronics and suitable for smartphone power management, portable camera sensor biasing, and GPS RF front-end regulation requiring stable component supply, long-term lifecycle support, and consistent wafer-lot traceability.
Supply support for LD6816CX4/33H,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 leader focused on secure connectivity solutions for automotive, industrial, and mobile applications, with deep expertise in power management and analog IC design.
The LD6816 series was developed specifically for ultra-miniaturized, low-noise power delivery in portable consumer electronics-emphasizing wafer-level packaging, sub-50 mV dropout, and integrated protection for battery-powered systems.
FAQ
What is the nominal output voltage and tolerance of the LD6816CX4/33H,315?
The LD6816CX4/33H,315 delivers a fixed 3.3 V output with ±2% tolerance over −40 °C to +85 °C ambient temperature and 1 mA to 150 mA load current. This specification is guaranteed per Table 9 in the official NXP datasheet Rev. 1 (2012), ensuring compatibility with standard 3.3 V logic families without external trimming.
Does the LD6816CX4/33H,315 support active-HIGH enable control, and what are the voltage thresholds?
Yes, the LD6816CX4/33H,315 features an active-HIGH enable input (EN pin A2) with VIH ≥ 1.1 V and VIL ≤ 0.4 V, as specified in Table 7 and Figure 21 of the datasheet. The threshold is independent of input voltage, allowing reliable control from 1.8 V or 3.3 V GPIOs without level-shifting.
What output capacitor is required for stable operation of the LD6816CX4/33H,315?
The LD6816CX4/33H,315 requires a minimum 0.7 µF X7R ceramic capacitor at the OUT pin, with 1.0 µF recommended (Table 10). Capacitor ESR must be between 5 mΩ and 500 mΩ; deviation risks instability or excessive overshoot during load transients.
How does the LD6816CX4/33H,315 behave when disabled, and how does it differ from P-suffix variants?
When disabled (EN LOW), the LD6816CX4/33H,315 places the OUT pin in a high-ohmic (3-state) condition-no internal pull-down. In contrast, P-suffix variants integrate a ~100 Ω pull-down transistor for auto-discharge. This makes LD6816CX4/33H,315 ideal where output isolation is preferred over forced discharge.
Is the LD6816CX4/33H,315 RoHS-compliant and halogen-free?
Yes, the LD6816CX4/33H,315 is Pb-free, fully compliant with EU RoHS Directive 2011/65/EU, and free of halogens and antimony per NXP's "dark green" compliance standard (Section 1.2). Full material declarations are available upon request from NXP.
LD6816CX4/33H,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):
- 3.3V
- 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)
LD6816CX4/33H,315 FAQ
1.How can I place an order for LD6816CX4/33H,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/33H,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 LD6816CX4/33H,315 reliable?
The price and inventory of LD6816CX4/33H,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6816CX4/33H,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/33H,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/33H,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/33H,315?
LD6816CX4/33H,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/33H,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 LD6816CX4/33H,315?
For technical support, including LD6816CX4/33H,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/33H,315 requirements.
6.How does Aetrix verify that LD6816CX4/33H,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/33H,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 LD6816CX4/33H,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/33H,315?
All LD6816CX4/33H,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/33H,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 LD6816CX4/33H,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/33H,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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