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NXP Semiconductors LD6816CX4/29H,315
- Part No.:
- LD6816CX4/29H,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6816CX4/29H,315.pdf
- Description:
- IC REG LINEAR 2.9V 150MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
LD6816CX4/29H,315 from NXP Semiconductors is a 2.9 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package (0.76 mm × 0.76 mm), featuring 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and high-ohmic (3-state) output during disable. It operates from 2.3 V to 5.5 V input and targets power-sensitive mobile interfaces.
For engineers reviewing the LD6816CX4/29H,315 datasheet, LD6816CX4/29H,315 pinout, LD6816CX4/29H,315 application, or LD6816CX4/29H,315 equivalent, key selection criteria include dropout performance under 150 mA load, shutdown quiescent current (< 1 µA), PSRR (55 dB @ 1 kHz), thermal protection (160 °C trip), and WLCSP4 soldering compatibility for miniaturized PCB layouts.
Technical Context
The LD6816CX4/29H,315 uses a PMOS pass transistor architecture enabling ultra-low dropout (45 mV typ. @ 150 mA) and stable regulation across −40 °C to +85 °C ambient. Its enable input (EN) is active-HIGH with VIH ≥ 1.1 V and VIL ≤ 0.4 V, supporting direct GPIO control without level-shifting.
It integrates over-temperature shutdown (160 °C, 20 K hysteresis) and output current limiting (600 mA short-circuit current), while maintaining low-noise operation via internal bandgap reference and optimized error amplifier design - critical for analog sensor and RF supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.9 V ±3 % over −40 °C to +85 °C; ensures stable core voltage for 2.8–3.0 V logic domains. |
| Dropout voltage | 45 mV typical at 150 mA; enables operation with VIN as low as 2.945 V, maximizing battery runtime in single-cell Li-ion systems. |
| PSRR | 55 dB @ 1 kHz; suppresses switching noise from upstream DC-DC converters feeding sensitive analog circuitry. |
| Output noise | 30 µVRMS (10 Hz–100 kHz); meets low-noise requirements for ADC references and RF LNA biasing. |
| Quiescent current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes leakage current in always-on subsystems. |
| Start-up time | < 150 µs to 95 % of 2.9 V; supports fast wake-up sequences in portable devices with dynamic power states. |
| Thermal shutdown | 160 °C with 20 K hysteresis; protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
LD6816CX4/29H,315 is housed in 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 Pb-free/RoHS-compliant construction.
| 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) | Enable control input | Active-HIGH logic interface; drives internal pass transistor; requires ≥1.1 V to enable, ≤0.4 V to disable. |
| OUT (B1) | Regulated output | Delivers 2.9 V to load; exhibits high-ohmic (3-state) behavior when disabled - no auto-discharge required. |
| IN (B2) | Input voltage supply | Accepts 2.3–5.5 V; requires local 1 µF X7R ceramic capacitor (ESR 5–500 mΩ) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 45 mV @ 150 mA enables >98 % efficiency at light-to-moderate loads in space-constrained battery-powered designs. |
| Low-noise regulation | 30 µVRMS output noise supports precision analog circuits without external filtering overhead. |
| High-ohmic disable state | Output floats when disabled - eliminates unintended discharge paths in multi-rail systems requiring independent sequencing. |
| Integrated ESD protection | 10 kV HBM rating allows direct integration into handheld device front-end without external TVS diodes. |
| Miniature WLCSP4 footprint | 0.76 mm × 0.76 mm area reduces PCB real estate by >70 % vs. SOT-23 packages, enabling ultra-thin mobile form factors. |
Applications
| Smartphone Camera Module Power | Portable Media Player Audio Bias |
|---|---|
|
Use Scenario: Powering CMOS image sensor analog front-end and ISP core logic in slim smartphone camera modules. IC Role / Device Role / Timing Role: Low-noise, fast-starting LDO delivering stable 2.9 V rail isolated from noisy SoC supplies. Use Value: 30 µVRMS noise prevents image sensor pattern noise; 150 µs start-up enables rapid camera activation from sleep mode. |
Use Scenario: Supplying DAC and headphone amplifier bias in battery-powered portable media players. IC Role / Device Role / Timing Role: Ultra-low-dropout regulator providing clean 2.9 V for audio signal chain components. Use Value: 45 mV dropout extends playback time on aging Li-ion cells; high-ohmic disable prevents cross-talk during audio mute transitions. |
| Digital Still Camera Sensor Interface | Personal Navigation Device GPS Front-End |
|
Use Scenario: Regulating power to high-resolution CCD/CMOS sensor interface ICs in compact digital still cameras. IC Role / Device Role / Timing Role: Precision 2.9 V source with tight line/load regulation for sensor timing and ADC reference stability. Use Value: ±3 % output accuracy over temperature ensures consistent sensor gain calibration; 55 dB PSRR rejects DC-DC ripple affecting image quality. |
Use Scenario: Supplying LNA and downconverter stages in GPS/GNSS receivers embedded in handheld navigation devices. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO powering RF signal chain under variable ambient conditions. Use Value: 160 °C thermal shutdown prevents damage during enclosure overheating; 0.1 µA shutdown current preserves battery during GPS cold starts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B292MR-G | 2.9 V fixed output, 150 mA, 65 mV dropout (typ.), SOT-25 package (2.9 mm × 2.8 mm) | Larger footprint; higher dropout reduces usable battery range in single-cell systems | Select when board layout permits larger package and lower cost outweighs miniaturization needs. |
| Richtek RT9013-29GB | 2.9 V fixed output, 300 mA, 250 mV dropout (typ.), DFN-6L (2 mm × 2 mm), 1.5 µA quiescent current (active) | Higher dropout and active IQ limit battery life; larger package than WLCSP4 | Choose only if higher output current headroom is required and thermal derating is acceptable. |
Compared with XC6219B292MR-G and RT9013-29GB, LD6816CX4/29H,315 delivers superior miniaturization (0.76 mm² vs. ≥5.6 mm²), lowest dropout (45 mV), and lowest shutdown IQ (0.1 µA), making it optimal for space- and energy-constrained portable electronics where WLCSP assembly is supported.
Availability
LD6816CX4/29H,315 is available at Aetrix Electronics and suitable for smartphone camera modules, portable media player audio subsystems, digital still camera sensor interfaces, and personal navigation device GPS front-ends requiring stable component supply with guaranteed long-term sourcing.
Supply support for LD6816CX4/29H,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 and RF technologies.
The LD6816 series was designed specifically for ultra-miniaturized, battery-powered mobile devices requiring ultra-low-noise, ultra-low-dropout regulation in wafer-level packaging - targeting next-generation smartphones, wearables, and IoT edge sensors.
FAQ
What is the nominal output voltage and tolerance of LD6816CX4/29H,315?
The LD6816CX4/29H,315 provides a fixed 2.9 V output with ±3 % tolerance over the full operating temperature range (−40 °C to +85 °C) and load current (1 mA to 150 mA). This accuracy is maintained without external feedback components, simplifying design for 2.8–3.0 V logic and analog supply rails.
Does LD6816CX4/29H,315 support auto-discharge functionality?
No, LD6816CX4/29H,315 does not include auto-discharge. As indicated by the "H" suffix, it enters a high-ohmic (3-state) output condition when disabled via the EN pin. For auto-discharge capability, select the "P" or "CxxP" variants (e.g., LD6816CX4/29P), which integrate a pull-down transistor.
What is the recommended output capacitor for LD6816CX4/29H,315?
The LD6816CX4/29H,315 requires a minimum 0.7 µF X7R ceramic capacitor at the OUT pin, with 1.0 µF recommended. Capacitor ESR must be between 5 mΩ and 500 mΩ. This ensures stability, controls start-up/shutdown transients, and maintains PSRR performance across frequency.
Can LD6816CX4/29H,315 operate from a 2.5 V input supply?
Yes, LD6816CX4/29H,315 supports input voltages from 2.3 V to 5.5 V. With a 2.5 V input and 2.9 V output requirement, the device operates in dropout mode - delivering regulated 2.9 V only if VIN ≥ VOUT + VDO (i.e., ≥2.945 V). At 2.5 V input, output follows input minus dropout (≈2.455 V), not regulation.
What is the thermal resistance and maximum power dissipation of LD6816CX4/29H,315?
LD6816CX4/29H,315 has a typical junction-to-ambient thermal resistance (Rth(j-a)) of 130 K/W under standard two-layer PCB conditions. Maximum power dissipation is 770 mW at Tamb = 25 °C, derating linearly above that ambient. Full thermal performance depends on copper area and via count beneath the WLCSP4 package.
LD6816CX4/29H,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):
- 2.9V
- 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)
LD6816CX4/29H,315 FAQ
1.How can I place an order for LD6816CX4/29H,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/29H,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 LD6816CX4/29H,315 reliable?
The price and inventory of LD6816CX4/29H,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6816CX4/29H,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/29H,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/29H,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/29H,315?
LD6816CX4/29H,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/29H,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 LD6816CX4/29H,315?
For technical support, including LD6816CX4/29H,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/29H,315 requirements.
6.How does Aetrix verify that LD6816CX4/29H,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/29H,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 LD6816CX4/29H,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/29H,315?
All LD6816CX4/29H,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/29H,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 LD6816CX4/29H,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/29H,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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