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NXP Semiconductors LD6816CX4/14P,315
- Part No.:
- LD6816CX4/14P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6816CX4/14P,315.pdf
- Description:
- IC REG LINEAR 1.4V 150MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
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Product details
Overview
LD6816CX4/14P,315 from NXP Semiconductors is a 1.4 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 rails in space-constrained mobile devices.
For engineers reviewing the LD6816CX4/14P,315 datasheet, LD6816CX4/14P,315 pinout, LD6816CX4/14P,315 application, or LD6816CX4/14P,315 equivalent, key selection criteria include its 1.4 V fixed output, WLCSP4 footprint compatibility, enable-controlled auto-discharge behavior, low-noise performance, and thermal shutdown protection for portable battery-powered systems.
Technical Context
The LD6816CX4/14P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout voltage and high PSRR (55 dB at 1 kHz). Its internal reference generator and feedback network ensure ±0.5% output accuracy at 25 °C with ±3% variation over −40 °C to +85 °C ambient range.
It integrates active enable control (VIH = 1.1 V min), over-temperature shutdown (160 °C trip, 20 K hysteresis), and current limiting (600 mA short-circuit protection). The auto-discharge function pulls OUT to GND via a 100 Ω internal switch when EN is low, eliminating residual voltage on downstream capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.4 V ±0.5% at 25 °C; supports precision biasing of low-voltage logic and RF circuitry |
| Dropout Voltage | 45 mV typical at 150 mA; enables operation with minimal VIN–VOUT headroom, extending battery life |
| PSRR | 55 dB at 1 kHz; suppresses ripple from noisy switching supplies feeding sensitive analog blocks |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); critical for powering ADCs, PLLs, and audio codecs without added filtering |
| Quiescent Current | 0.1 µA typical in shutdown; reduces standby power loss in always-on subsystems |
| Enable Threshold | VIL ≤ 0.4 V, VIH ≥ 1.1 V; compatible with 1.8 V/3.3 V GPIO without level-shifting |
| Thermal Protection | 160 °C shutdown with 20 K hysteresis; prevents permanent damage during transient overload or poor PCB thermal design |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP4), 0.76 mm × 0.76 mm × 0.47 mm, 0.4 mm ball pitch, Pb-free/RoHS-compliant, dark green halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Supply ground reference | Primary return path for regulator current; must connect to low-impedance ground plane for stability and noise control |
| EN (A2) | Active-HIGH enable input | Controls LDO operation; drives high (>1.1 V) to activate, low (<0.4 V) to disable with auto-discharge |
| OUT (B1) | Regulated output voltage | Delivers 1.4 V to load; includes internal 100 Ω pull-down to GND when disabled |
| IN (B2) | Input supply voltage | Accepts 2.3 V–5.5 V; requires local 1 µF X7R ceramic capacitor with ESR 5–500 mΩ for stability |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor discharges output capacitance rapidly upon disable, preventing unintended wake-up or latch-up in powered-down states |
| Ultra-low noise regulation | 30 µVRMS output noise enables direct powering of precision analog circuits without additional LDO stages or ferrite beads |
| Fast transient response | 150 µs startup time ensures rapid system power sequencing; 300 µs shutdown time supports controlled power-down sequences |
| Robust protection suite | Includes over-temperature shutdown (160 °C), current limiting (600 mA), and 10 kV HBM ESD protection on all pins |
| Miniaturized packaging | 0.76 mm × 0.76 mm WLCSP4 footprint saves >70% board area vs. SOT-23, ideal for smartphones and wearables |
Applications
| Smartphone Baseband Core | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processor core rails requiring precise 1.4 V at up to 150 mA with minimal voltage droop during burst activity. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout voltage regulator delivering stable core supply; enables fast dynamic voltage scaling transitions. Use Value: 45 mV dropout preserves battery runtime; 30 µVRMS noise prevents digital switching artifacts from corrupting CPU timing margins. |
Use Scenario: Supplying bias voltage to CMOS image sensor analog front-end (AFE) where supply ripple directly impacts SNR and fixed-pattern noise. IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating sensor AFE from noisy digital domain supplies. Use Value: 55 dB PSRR at 1 kHz attenuates switching noise from nearby DC-DC converters; ±0.5% output accuracy maintains consistent pixel response calibration. |
| Portable Media Player Audio Codec | Bluetooth SoC RF Section |
Use Scenario: Providing clean 1.4 V supply to stereo audio DAC/ADC in battery-powered media players with strict THD+N requirements. IC Role / Device Role / Timing Role: Low-noise post-regulator for audio signal chain; placed adjacent to codec IC to minimize trace inductance. Use Value: 30 µVRMS noise floor avoids audible hiss; auto-discharge clears residual charge during sleep mode to prevent pop/click on wake-up. |
Use Scenario: Powering 2.4 GHz Bluetooth radio transceiver's LNA and mixer stages where supply noise degrades receiver sensitivity and EVM. IC Role / Device Role / Timing Role: Local LDO decoupling RF section from shared system rail; enabled synchronously with radio activation. Use Value: 45 mV dropout allows operation from single-cell Li-ion (3.0–4.2 V); 10 kV HBM ESD rating protects against handling damage during assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B142MR-G | 1.4 V fixed output, 150 mA, 65 mV dropout (typ), 40 µVRMS noise, SOT-25 package (2.9 mm × 2.8 mm) | Larger footprint; no auto-discharge; higher dropout reduces usable battery range | Select when board space permits larger package and auto-discharge is unnecessary |
| Richtek RT9013-14GB | 1.4 V fixed output, 300 mA, 250 mV dropout (typ), 45 µVRMS noise, DFN-4 (1.0 mm × 1.0 mm) | Higher current capability but 5.6× higher dropout; no integrated pull-down; larger than WLCSP4 | Choose only if >150 mA load current or DFN assembly infrastructure exists |
Compared with XC6219B142MR-G and RT9013-14GB, LD6816CX4/14P,315 offers the smallest footprint, lowest dropout, lowest noise, and unique auto-discharge-making it optimal for miniaturized, battery-sensitive, and fast-wake applications where residual output voltage must be actively cleared.
Availability
LD6816CX4/14P,315 is available at Aetrix Electronics and suitable for smartphone baseband power, camera sensor bias, and portable audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LD6816CX4/14P,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 consumer markets, with deep expertise in power management and analog ICs.
The LD6816 series was designed specifically for ultra-miniaturized, battery-powered portable electronics requiring low-noise, low-dropout regulation with intelligent power sequencing-targeting smartphones, wearables, and IoT edge sensors.
FAQ
What is the nominal output voltage of the LD6816CX4/14P,315?
The LD6816CX4/14P,315 provides a fixed 1.4 V nominal output voltage with ±0.5% accuracy at 25 °C and ±3% over −40 °C to +85 °C ambient temperature. This value is confirmed by Table 4 in the NXP datasheet, which maps the "/14P" suffix to 1.4 V output across the LD6816CX4/xxP family.
Does the LD6816CX4/14P,315 include auto-discharge functionality?
Yes, the LD6816CX4/14P,315 includes an integrated pull-down transistor that provides low-ohmic output state (auto-discharge) when disabled. As stated in Section 1.1 and Table 4, the "P" suffix denotes this feature, and electrical characteristics confirm Rpd = 100 Ω typical in shutdown mode.
What package type and dimensions does the LD6816CX4/14P,315 use?
The LD6816CX4/14P,315 uses a Wafer-Level Chip-Scale Package (WLCSP4) measuring 0.76 mm × 0.76 mm × 0.47 mm with 0.4 mm solder bump pitch. Dimensions are specified in Table 14 and Figure 24 of the NXP datasheet, confirming compliance with JEDEC MO-220 standards for ultra-compact mounting.
What is the maximum input voltage rating for the LD6816CX4/14P,315?
The LD6816CX4/14P,315 has an absolute maximum input voltage of +6.0 V for 4 ms transients, with recommended operating range of 2.3 V to 5.5 V per Table 7. Exceeding 5.5 V continuously risks exceeding thermal limits or triggering overvoltage protection not explicitly implemented in this device.
How does the enable pin (EN) interface with common microcontroller GPIOs?
The EN pin of LD6816CX4/14P,315 accepts standard 1.8 V or 3.3 V logic levels: VIH ≥ 1.1 V activates regulation, while VIL ≤ 0.4 V disables it with auto-discharge. This eliminates need for external level shifters when interfacing with most modern MCU I/O ports, as verified in Table 7 and Figure 21 of the datasheet.
LD6816CX4/14P,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):
- 1.4V
- 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)
LD6816CX4/14P,315 FAQ
1.How can I place an order for LD6816CX4/14P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/14P,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 LD6816CX4/14P,315 reliable?
The price and inventory of LD6816CX4/14P,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6816CX4/14P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/14P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/14P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/14P,315?
LD6816CX4/14P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/14P,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 LD6816CX4/14P,315?
For technical support, including LD6816CX4/14P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/14P,315 requirements.
6.How does Aetrix verify that LD6816CX4/14P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/14P,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 LD6816CX4/14P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/14P,315?
All LD6816CX4/14P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/14P,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 LD6816CX4/14P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/14P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LD6816CX4/14P,315 Tags
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