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NXP Semiconductors LD6816CX4/C23P,315
- Part No.:
- LD6816CX4/C23P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
LD6816CX4/C23P,315.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:63,000
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Product details
Overview
LD6816CX4/C23P,315 from NXP Semiconductors is a 2.3 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package with auto-discharge function (integrated pull-down transistor), 45 mV dropout at full load, 30 µVRMS output noise, and 55 dB PSRR at 1 kHz-designed for powering core logic and RF circuitry in space-constrained mobile devices.
For engineers reviewing the LD6816CX4/C23P,315 datasheet, LD6816CX4/C23P,315 pinout, LD6816CX4/C23P,315 application, or LD6816CX4/C23P,315 equivalent, key selection criteria include its 0.76 mm × 0.76 mm WLCSP footprint, enable-controlled shutdown with 300 µs discharge time, ±3% output voltage accuracy over −40 °C to +85 °C, and compatibility with 1.0 µF X7R ceramic output capacitors.
Technical Context
The LD6816CX4/C23P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and fast transient response. Its internal bandgap reference, error amplifier, and thermal/overcurrent protection circuitry operate independently of input voltage variations between 2.3 V and 5.5 V.
Unlike high-impedance disable variants, this part integrates a dedicated pull-down switch (Rpd = 100 Ω typical) on the OUT pin, ensuring rapid discharge of downstream capacitance during shutdown-critical for power sequencing in multi-rail portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.3 V ±3% over −40 °C to +85 °C; enables direct powering of 2.3 V I/O domains without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA; allows regulation from 2.345 V input, maximizing battery runtime in single-cell Li-ion/Li-poly systems. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from adjacent DC-DC converters feeding the LDO input rail. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); meets low-noise requirements for RF transceivers and precision analog sensors. |
| 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. |
| Shutdown Current | 0.1 µA typical; reduces system standby power in always-on sensor nodes and wearable controllers. |
| Start-up Time | <150 µs to 95% of 2.3 V; supports fast wake-up from deep-sleep modes in real-time applications. |
Pinout & Package
LD6816CX4/C23P,315 uses a 0.4 mm pitch Wafer-Level Chip-Scale Package (WLCSP4) measuring 0.76 mm × 0.76 mm × 0.47 mm with backside coating, optimized for high-density PCB layouts and reflow soldering.
| 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 LDO operation; drives high (>1.1 V) to activate, low (<0.4 V) to enter auto-discharge shutdown mode. |
| OUT (B1) | Regulated output voltage | Delivers stable 2.3 V; includes integrated 100 Ω pull-down transistor for controlled discharge when disabled. |
| IN (B2) | Input supply voltage | Accepts 2.3 V–5.5 V; requires local 1.0 µF X7R ceramic capacitor placed within 2 mm of the pin. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor discharges output capacitance in ≤300 µs, preventing floating voltages during power sequencing. |
| Ultra-low noise regulation | 30 µVRMS output noise enables clean power for RF front-ends and high-resolution ADCs without additional filtering. |
| Backside-coated WLCSP | Enhanced mechanical robustness and moisture resistance for reliability in handheld and wearable end-equipment. |
| Thermal & current protection | 160 °C overtemperature shutdown with 20 K hysteresis and foldback current limiting prevent damage under fault conditions. |
| Pb-free & halogen-free | RoHS-compliant and dark green certified, meeting stringent environmental requirements for global consumer electronics markets. |
Applications
| Smartphone Application Processor Core Rail | Bluetooth Low Energy SoC Power Domain |
|---|---|
Use Scenario: Powers 2.3 V core logic of application processors during active and burst-mode operation in slim smartphone designs. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout voltage regulator delivering stable 2.3 V with fast transient response to handle CPU DVFS transitions. Use Value: Enables >95% efficiency at light loads and maintains <±3% regulation during 150 mA load steps, reducing thermal stress on stacked-die packages. | Use Scenario: Supplies regulated 2.3 V to BLE radio subsystems in wearables where board area and standby power are critical. IC Role / Device Role / Timing Role: Always-on LDO with 0.1 µA shutdown current and auto-discharge, synchronized to host MCU sleep/wake cycles via EN pin. Use Value: Eliminates need for external discharge FET, saving 0.5 mm² PCB area and simplifying BOM while ensuring safe power-down sequencing. |
| Digital Still Camera Image Sensor Bias | Portable Media Player Audio Codec Supply |
Use Scenario: Provides ultra-low-noise 2.3 V bias to CMOS image sensor analog front-end in compact DSC modules. IC Role / Device Role / Timing Role: Low-noise LDO decoupling switching noise from main DC-DC converter, directly feeding sensor analog rails. Use Value: 30 µVRMS noise floor prevents fixed-pattern noise in captured images, supporting 12-bit+ dynamic range without post-processing. | Use Scenario: Powers stereo audio codec ICs in battery-powered media players requiring clean, sequenced power-up. IC Role / Device Role / Timing Role: Secondary LDO with controlled start-up and auto-discharge, enabling glitch-free audio playback initiation and mute-on-shutdown. Use Value: <150 µs start-up ensures no audible pop/click at playback start; 300 µs discharge prevents residual voltage causing DAC latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0523PDQNR | 2.3 V fixed output, 200 mA rating, 170 mV dropout at 200 mA, SOT-563 package (1.6 mm × 1.6 mm) | Larger footprint; lacks auto-discharge; higher quiescent current (0.25 µA vs. 0.1 µA) | Preferred when board space permits larger package and auto-discharge is not required. |
| MCP1700-2302E/TO | 2.3 V fixed output, 250 mA rating, 600 mV dropout at 250 mA, TO-92 through-hole package | Through-hole mounting; unsuitable for high-density SMT designs; no enable or auto-discharge | Only suitable for prototyping or legacy through-hole assemblies where miniaturization is not critical. |
Compared with TPS7A0523PDQNR and MCP1700-2302E/TO, LD6816CX4/C23P,315 delivers superior dropout performance (45 mV vs. ≥170 mV), true auto-discharge capability, and a 75% smaller footprint-making it the optimal choice for production-grade portable electronics demanding minimal size and precise power sequencing.
Availability
LD6816CX4/C23P,315 is available at Aetrix Electronics and suitable for smartphone power management, BLE wearable subsystems, digital camera sensor biasing, and portable media player audio supplies requiring stable component supply and long-term lifecycle support.
Supply support for LD6816CX4/C23P,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 electronics, with leadership in power management and RF technologies.
The LD6816 series was developed specifically for ultra-miniaturized portable devices requiring high-efficiency, low-noise, and fast-response LDO regulation in sub-1 mm² footprints-targeting next-generation smartphones, wearables, and IoT edge nodes.
FAQ
What is the nominal output voltage of the LD6816CX4/C23P,315?
The LD6816CX4/C23P,315 provides a fixed nominal output voltage of 2.3 V, with guaranteed accuracy of ±3% across the full operating temperature range of −40 °C to +85 °C and load currents from 1 mA to 150 mA. This value is laser-marked as "L" on the WLCSP die per Table 13 of the datasheet, confirming its C23P variant designation.
Does the LD6816CX4/C23P,315 include an auto-discharge function?
Yes, the LD6816CX4/C23P,315 integrates an active pull-down transistor on the OUT pin, providing low-ohmic discharge (Rpd = 100 Ω typical) during shutdown. This auto-discharge function ensures the output voltage falls to 10% of nominal within 300 µs after EN is deasserted-critical for reliable power sequencing in multi-rail portable systems.
What package type and dimensions does the LD6816CX4/C23P,315 use?
The LD6816CX4/C23P,315 is housed in a wafer-level chip-scale package with backside coating (WLCSP4), measuring 0.76 mm × 0.76 mm × 0.47 mm with 0.4 mm bump pitch. Its compact size and solder-ball terminations enable ultra-high-density PCB layouts, and the backside coating improves mechanical integrity and moisture resistance.
What is the recommended output capacitor for stable operation of the LD6816CX4/C23P,315?
The LD6816CX4/C23P,315 requires a minimum 0.7 µF ceramic output capacitor, with 1.0 µF X7R recommended for full temperature range (−40 °C to +125 °C) stability. The capacitor must have ESR between 5 mΩ and 500 mΩ and be placed within 2 mm of the OUT and GND pins to ensure loop stability and optimal transient response.
How does the LD6816CX4/C23P,315 achieve ultra-low dropout performance?
The LD6816CX4/C23P,315 achieves a typical dropout voltage of 45 mV at 150 mA by using a PMOS pass transistor architecture, which eliminates gate-drive overhead inherent in NMOS-based LDOs. This design allows regulation down to VIN = VOUT + 45 mV, enabling extended battery life in single-cell Li-ion systems where input voltage can sag below 2.5 V.
LD6816CX4/C23P,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):
- 2.3V
- 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/C23P,315 FAQ
1.How can I place an order for LD6816CX4/C23P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/C23P,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/C23P,315 reliable?
The price and inventory of LD6816CX4/C23P,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/C23P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/C23P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/C23P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/C23P,315?
LD6816CX4/C23P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/C23P,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/C23P,315?
For technical support, including LD6816CX4/C23P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/C23P,315 requirements.
6.How does Aetrix verify that LD6816CX4/C23P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/C23P,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/C23P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/C23P,315?
All LD6816CX4/C23P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/C23P,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/C23P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/C23P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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