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NXP Semiconductors LD6816CX4/C36P,315
- Part No.:
- LD6816CX4/C36P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
LD6816CX4/C36P,315.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
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Product details
Overview
LD6816CX4/C36P,315 from NXP Semiconductors is a 3.6 V fixed-output, 150 mA ultra-low-dropout linear regulator in a 0.4 mm pitch WLCSP4 package. It delivers 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and 55 dB PSRR at 1 kHz, enabling stable power for noise-sensitive analog circuitry in space-constrained portable devices.
For engineers reviewing the LD6816CX4/C36P,315 datasheet, LD6816CX4/C36P,315 pinout, LD6816CX4/C36P,315 application, or LD6816CX4/C36P,315 equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The LD6816CX4/C36P,315 integrates a precision bandgap reference, error amplifier, and PMOS pass transistor optimized for sub-50 mV dropout operation across its 2.3 V–5.5 V input range. Its auto-discharge function uses an internal pull-down transistor (Rpd = 100 Ω typical) to actively discharge the output during disable, eliminating residual voltage hold-up in battery-powered systems.
It features over-temperature shutdown (Tsd = 160 °C, hysteresis = 20 K), current limiting (Isc = 600 mA), and ESD protection rated to ±10 kV HBM. Startup time is <150 µs to 95% of 3.6 V output with 1 µF ceramic output capacitance, and quiescent current drops to 0.1 µA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6 V ±3% over −40 °C to +85 °C ambient; enables direct replacement of 3.6 V logic rails without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA; allows operation with VIN as low as 3.645 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 feeding sensitive RF or ADC subsystems. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); meets low-noise requirements for high-resolution SAR ADC references and RF synthesizer VCO supplies. |
| 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 Shutdown | 160 °C junction temperature with 20 K hysteresis; prevents thermal runaway during sustained overload or poor PCB heat sinking. |
| Package | WLCSP4 (0.76 mm × 0.76 mm × 0.47 mm, 0.4 mm pitch); supports ultra-dense layouts in smartphones and wearables where board area is premium. |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP4) with backside coating; 4 solder bumps in 2×2 array; dimensions 0.76 mm × 0.76 mm × 0.47 mm; RoHS-compliant, halogen-free, Pb-free.
| 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 PSRR and thermal performance. |
| EN (A2) | Active-HIGH enable input | Drives internal pass transistor; logic HIGH ≥1.1 V enables regulation; logic LOW ≤0.4 V disables output and activates auto-discharge. |
| OUT (B1) | Regulated output voltage | Delivers 3.6 V to load; includes integrated pull-down transistor (100 Ω typical) to discharge external capacitors when disabled. |
| IN (B2) | Input voltage supply | Accepts 2.3 V–5.5 V; requires local 1 µF X7R ceramic capacitor placed within 2 mm of pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 45 mV at 150 mA ensures >98.8% efficiency at 3.6 V output with 3.65 V input-critical for extending battery life in portable electronics. |
| Auto-discharge function | Integrated 100 Ω pull-down transistor on OUT pin actively discharges load capacitance during disable, preventing unintended wake-up or latch-up in power-gated domains. |
| Low-noise regulation | 30 µVRMS output noise (10 Hz–100 kHz) enables clean biasing of precision analog sensors, audio codecs, and RF front-end components. |
| Fast startup | <150 µs to reach 95% of 3.6 V output allows rapid power sequencing in multi-rail systems with tight timing budgets. |
| Robust protection | Over-temperature shutdown (160 °C), current limiting (600 mA short-circuit), and ±10 kV HBM ESD rating ensure field reliability in handheld consumer devices. |
Applications
| Smartphone Baseband Power | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Supplying 3.6 V to baseband processor I/O banks during active transmission cycles with fast load transients. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO providing stable core voltage while rejecting ripple from shared PMIC switchers. Use Value: 55 dB PSRR at 1 kHz and <150 µs startup prevent data corruption and maintain RF transmit accuracy under dynamic load conditions. |
Use Scenario: Biasing CMOS image sensor analog front-end (AFE) requiring ultra-low noise and precise 3.6 V rail. IC Role / Device Role / Timing Role: Primary analog supply LDO delivering clean, regulated voltage with minimal RMS noise contribution. Use Value: 30 µVRMS output noise directly reduces sensor readout noise floor, improving SNR and dynamic range in low-light capture. |
| Portable Media Player Audio DAC | Wearable Health Monitor Analog Front-End |
|
Use Scenario: Powering stereo audio DAC in battery-operated media players where audible noise and battery life are critical. IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating DAC from noisy digital supply domains. Use Value: Sub-50 mV dropout extends usable battery voltage range, while low quiescent current (0.1 µA in shutdown) minimizes standby drain. |
Use Scenario: Supplying 3.6 V to biopotential amplifiers and ADCs in compact wearable ECG/PPG modules. IC Role / Device Role / Timing Role: Precision analog rail generator with auto-discharge ensuring safe power-down of medical-grade signal chains. Use Value: Active pull-down eliminates floating output during sleep mode, preventing leakage-induced baseline drift in sensitive bio-signal acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0536PDQNR | 3.6 V fixed output, 200 mA, 170 mV dropout at 200 mA, SOT-563 package (1.6 mm × 1.6 mm). | Larger footprint and higher dropout reduce suitability for ultra-thin mobile designs; lacks auto-discharge. | Select when board space permits larger package and auto-discharge is not required. |
| MCP1700T-3602E/TT | 3.6 V fixed output, 250 mA, 600 mV dropout at 250 mA, SOT-23-5 package. | Significantly higher dropout limits use with low-VIN sources; no enable pin or auto-discharge; higher noise (80 µVRMS). | Choose only for cost-sensitive, non-portable applications where size and noise are secondary. |
Compared with LD6816CX4/C36P,315, TPS7A0536PDQNR offers higher current but sacrifices miniaturization and active discharge, while MCP1700T-3602E/TT trades critical low-dropout and low-noise performance for lower unit cost in less demanding environments.
Availability
LD6816CX4/C36P,315 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera image sensor bias, portable media player audio DAC, and wearable health monitor analog front-end applications requiring stable component supply, consistent wafer-lot traceability, and long-term lifecycle support.
Supply support for LD6816CX4/C36P,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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.
The LD6816 series was designed specifically for ultra-miniaturized, battery-powered portable electronics requiring high-efficiency, low-noise, and fast-response power regulation in sub-1 mm² footprints.
FAQ
What is the output voltage tolerance of the LD6816CX4/C36P,315 over temperature?
The LD6816CX4/C36P,315 maintains ±3% output voltage accuracy across −40 °C to +85 °C ambient temperature at 1 mA load. At 150 mA, variation remains within ±4% over the same range, ensuring reliable operation for 3.6 V logic interfaces without external trimming. This tolerance is guaranteed by NXP's monolithic silicon process and on-die voltage reference calibration.
Does the LD6816CX4/C36P,315 require an external output capacitor, and what type is recommended?
Yes, the LD6816CX4/C36P,315 requires a minimum 0.7 µF X7R ceramic capacitor at the OUT pin, with 1.0 µF recommended for optimal stability and transient response. The capacitor must have ESR between 5 mΩ and 500 mΩ and be placed within 2 mm of the OUT pin. Using NP0/C0G or low-ESR tantalum violates stability criteria per NXP's application note AN10365.
How does the auto-discharge function operate in the LD6816CX4/C36P,315?
When the EN pin is driven LOW, the LD6816CX4/C36P,315 activates an internal 100 Ω pull-down transistor between OUT and GND, actively discharging external load capacitance. This ensures the output falls to <10% of 3.6 V within 300 µs (typical), preventing residual voltage from powering downstream circuits or causing undefined states during system sleep.
What is the maximum input voltage the LD6816CX4/C36P,315 can withstand during transient conditions?
The LD6816CX4/C36P,315 supports up to +6.0 V on the IN pin for transients lasting ≤4 ms, per its Absolute Maximum Ratings table. Continuous operation above 5.5 V risks permanent damage. For systems with potential 6 V surges (e.g., USB charging inputs), external clamping or pre-regulation is required before the LD6816CX4/C36P,315 input.
Is the LD6816CX4/C36P,315 compatible with lead-free reflow soldering processes?
Yes, the LD6816CX4/C36P,315 is qualified for lead-free reflow per J-STD-020C. Its WLCSP4 package has a moisture sensitivity level (MSL) of 1 and withstands peak temperatures up to 260 °C. Reflow profile must include preheat (60–120 s at 150–200 °C), soak (60–120 s at 183–200 °C), and reflow (≤10 s above 217 °C), with cooling rate ≤6 °C/s.
LD6816CX4/C36P,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):
- 3.6V
- 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/C36P,315 FAQ
1.How can I place an order for LD6816CX4/C36P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/C36P,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/C36P,315 reliable?
The price and inventory of LD6816CX4/C36P,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/C36P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/C36P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/C36P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/C36P,315?
LD6816CX4/C36P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/C36P,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/C36P,315?
For technical support, including LD6816CX4/C36P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/C36P,315 requirements.
6.How does Aetrix verify that LD6816CX4/C36P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/C36P,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/C36P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/C36P,315?
All LD6816CX4/C36P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/C36P,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/C36P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/C36P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LD6816CX4/C36P,315 Tags
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MIC5365-3.0YC5-TR
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