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NXP Semiconductors LD6816CX4/14H,315
- Part No.:
- LD6816CX4/14H,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6816CX4/14H,315.pdf
- Description:
- IC REG LINEAR 1.4V 150MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
LD6816CX4/14H,315 from NXP Semiconductors is a 1.4 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package, featuring 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and 55 dB PSRR at 1 kHz. It delivers stable low-noise power for voltage-sensitive analog and digital blocks in space-constrained mobile devices.
For engineers reviewing the LD6816CX4/14H,315 datasheet, LD6816CX4/14H,315 pinout, LD6816CX4/14H,315 application, or LD6816CX4/14H,315 equivalent, key selection criteria include high-ohmic (3-state) output during disable, sub-0.1 µA shutdown current, thermal/overcurrent protection, and compatibility with 0.7–1.0 µF X7R output capacitors.
Technical Context
The LD6816CX4/14H,315 employs a PMOS pass transistor architecture enabling ultra-low dropout operation down to 45 mV at 150 mA, with input voltage support from 2.3 V to 5.5 V. Its internal reference and error amplifier maintain ±0.5% output accuracy at 25 °C and ±3% over −40 °C to +85 °C ambient.
It integrates active-high enable logic (VIH ≥ 1.1 V, VIL ≤ 0.4 V), fast 150 µs startup time, and robust protection including over-temperature shutdown at 160 °C with 20 K hysteresis and current limiting to 600 mA short-circuit peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.4 V ±3% over −40 °C to +85 °C - ensures stable core or I/O rail for low-voltage processors and sensors. |
| Dropout Voltage | 45 mV typical at 150 mA - enables operation with minimal headroom, e.g., powering 1.4 V logic from a 1.45 V battery or intermediate rail. |
| Quiescent Current | 0.1 µA typical in shutdown mode - critical for battery-backed systems requiring multi-year shelf life. |
| PSRR | 55 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding sensitive RF or audio circuits. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz) - supports low-noise analog signal chains without additional filtering. |
| 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. |
| Thermal Protection | Shuts down at 160 °C with 20 K hysteresis - prevents permanent damage during transient overload or poor PCB thermal design. |
Pinout & Package
LD6816CX4/14H,315 uses 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 grid and index area marking bump A1.
| 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 regulator state; drives high (>1.1 V) to activate, low (<0.4 V) to enter high-ohmic shutdown. |
| OUT (B1) | Regulated output voltage | Delivers 1.4 V to load; presents high-impedance (3-state) when disabled - avoids back-driving or leakage paths. |
| IN (B2) | Input supply voltage | Accepts 2.3–5.5 V; requires local 1 µF X7R ceramic capacitor placed near the pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 45 mV at 150 mA enables use with tight input-output margins, extending battery runtime in portable systems. |
| Low-noise regulation | 30 µVRMS output noise supports precision ADCs, RF synthesizers, and audio codecs without added LDO post-filtering. |
| High-ohmic disable | Output floats to high-impedance state when EN = LOW - isolates downstream circuitry and prevents unintended power-up sequencing. |
| Integrated ESD protection | 10 kV HBM rating on all pins reduces need for external TVS diodes in handheld device front-end designs. |
| Miniature WLCSP4 package | 0.76 mm × 0.76 mm footprint saves >70% board area vs. SOT-23 - ideal for camera modules and wearable sensor nodes. |
Applications
| Smartphone Core Logic Supply | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering ARM Cortex-M or RISC-V microcontroller cores operating at 1.4 V in slim smartphone mainboards. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout voltage source delivering regulated 1.4 V with fast enable/disable control for dynamic power gating. Use Value: Enables deep-sleep modes with <0.1 µA quiescent draw while maintaining precise 1.4 V rail accuracy across temperature for reliable CPU boot and operation. | Use Scenario: Providing clean bias voltage to CMOS image sensor analog front-end (AFE) and column ADC circuitry. IC Role / Device Role / Timing Role: Low-noise LDO supplying isolated 1.4 V rail decoupled from noisy digital domains and switching regulators. Use Value: Reduces image sensor readout noise by 30 µVRMS, improving SNR and enabling higher dynamic range in low-light capture. |
| Portable Media Player Audio Codec | GPS/GLONASS Front-End Reference |
Use Scenario: Powering DAC/ADC sections of stereo audio codecs in Bluetooth headphones and portable speakers. IC Role / Device Role / Timing Role: Dedicated low-noise 1.4 V supply for audio signal path, synchronized with system enable signals for mute-on-power-down. Use Value: Eliminates audible pop/click during playback start/stop via controlled 150 µs startup and high-ohmic shutdown behavior. | Use Scenario: Delivering stable 1.4 V reference to GPS/GNSS RF front-end LNAs and mixer bias networks. IC Role / Device Role / Timing Role: Precision LDO providing ripple-free bias under varying RF load conditions and intermittent satellite acquisition bursts. Use Value: Maintains 55 dB PSRR at 1 kHz to reject switching noise from PMU, ensuring consistent GNSS sensitivity and time-to-first-fix performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0514PDBVR | 1.4 V fixed output, 200 mA, 170 mV dropout at 200 mA, SOT-23-5 package (2.9 mm × 1.6 mm) | Larger footprint, higher dropout, no high-ohmic disable - requires external pull-down for auto-discharge | Select when board layout allows larger package and higher dropout is acceptable; not suitable for ultra-miniaturized designs. |
| MCP1826T-1402E/MB | 1.4 V fixed output, 300 mA, 340 mV dropout at 300 mA, 2 mm × 2 mm DFN-8 package | Higher current capability but significantly larger size and higher noise (65 µVRMS) | Choose when higher output current or thermal margin is required; avoid where 0.76 mm × 0.76 mm WLCSP is mandatory. |
Compared with TPS7A0514PDBVR and MCP1826T-1402E/MB, LD6816CX4/14H,315 offers the smallest footprint, lowest dropout, and lowest noise - making it optimal for space- and performance-critical mobile applications where high-ohmic disable is needed for clean power sequencing.
Availability
LD6816CX4/14H,315 is available at Aetrix Electronics and suitable for smartphone power management, digital camera sensor biasing, and portable audio codec supply requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LD6816CX4/14H,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, low-noise, battery-powered portable electronics - targeting smartphones, wearables, and imaging devices needing sub-1.5 V rails with minimal dropout and high PSRR.
FAQ
What is the nominal output voltage of the LD6816CX4/14H,315?
The LD6816CX4/14H,315 provides a fixed nominal output voltage of 1.4 V, with guaranteed accuracy of ±0.5% at 25 °C and ±3% over the full operating temperature range of −40 °C to +85 °C. This value is confirmed in Table 3 of the NXP datasheet and corresponds to the "14H" suffix in the part number.
Does the LD6816CX4/14H,315 support high-ohmic output disable?
Yes, the LD6816CX4/14H,315 features a high-ohmic (3-state) output when disabled - a defining characteristic of the "H" variant. When the EN pin is driven LOW, the OUT pin enters a high-impedance state rather than being pulled low, preventing back-driving of downstream circuitry and enabling clean power sequencing in multi-rail systems.
What is the minimum recommended output capacitor for stable operation of the LD6816CX4/14H,315?
The LD6816CX4/14H,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 meet ±30% tolerance over temperature and operate across −40 °C to +125 °C. Using less than 0.7 µF risks instability and degraded transient response.
What is the thermal shutdown behavior of the LD6816CX4/14H,315?
The LD6816CX4/14H,315 activates thermal shutdown at a junction temperature of 160 °C and remains off until temperature drops by 20 K (to ~140 °C) due to built-in hysteresis. This protects the device during sustained overload or inadequate PCB heat sinking, and recovery is automatic once safe thermal conditions are restored.
Can the LD6816CX4/14H,315 be used with a 1.8 V enable signal?
Yes, the LD6816CX4/14H,315 accepts 1.8 V as a valid HIGH-level enable signal: its VIH specification is ≥1.1 V, and maximum input voltage on EN is VIN (up to 5.5 V). A 1.8 V GPIO directly drives EN without level-shifting, simplifying interface design with modern low-voltage MCUs and PMICs.
LD6816CX4/14H,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)
LD6816CX4/14H,315 FAQ
1.How can I place an order for LD6816CX4/14H,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/14H,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 LD6816CX4/14H,315 reliable?
The price and inventory of LD6816CX4/14H,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6816CX4/14H,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/14H,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/14H,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/14H,315?
LD6816CX4/14H,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/14H,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 LD6816CX4/14H,315?
For technical support, including LD6816CX4/14H,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/14H,315 requirements.
6.How does Aetrix verify that LD6816CX4/14H,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/14H,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 LD6816CX4/14H,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/14H,315?
All LD6816CX4/14H,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/14H,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 LD6816CX4/14H,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/14H,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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