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NXP Semiconductors LD6816CX4/16H,315
- Part No.:
- LD6816CX4/16H,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6816CX4/16H,315.pdf
- Description:
- IC REG LINEAR 1.6V 150MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,459
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Product details
Overview
LD6816CX4/16H,315 from NXP Semiconductors is a 1.6 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package with 45 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and high-ohmic (3-state) output during disable-designed for power-sensitive mobile interface rails in smartphones and portable media players.
For engineers reviewing the LD6816CX4/16H,315 datasheet, LD6816CX4/16H,315 pinout, LD6816CX4/16H,315 application, or LD6816CX4/16H,315 equivalent, key selection criteria include dropout voltage under 150 mA load, enable threshold compatibility (VIH ≥ 1.1 V), thermal resistance (Rth(j-a) = 130 K/W), and WLCSP4 soldering requirements for fine-pitch PCB assembly.
Technical Context
The LD6816CX4/16H,315 uses a PMOS pass transistor architecture enabling 45 mV dropout at 150 mA while maintaining stability with 1.0 µF X7R ceramic output capacitance. Its internal bandgap reference and error amplifier deliver ±0.5% output accuracy at 25 °C and ±3% over −40 °C to +85 °C ambient.
It integrates over-temperature shutdown (Tsd = 160 °C, hysteresis = 20 K), current limiting (Isc = 600 mA), and ESD protection (10 kV HBM). The active-HIGH enable input (VEN) controls regulator state without external pull-up, and the high-ohmic output on disable isolates downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.6 V ±3% over −40 °C to +85 °C - ensures stable core/interface rail for low-voltage logic without external feedback. |
| Dropout Voltage | 45 mV typical at 150 mA - enables operation from 1.645 V input, critical for battery-powered systems near end-of-discharge. |
| PSRR | 55 dB at 1 kHz - suppresses ripple from noisy switching supplies feeding the LDO input. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz) - supports noise-sensitive analog circuits like ADC references or RF bias rails. |
| Quiescent Current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V) - minimizes battery drain in standby mode for always-on subsystems. |
| Start-up Time | < 150 µs to 95% of 1.6 V - enables fast power sequencing in multi-rail mobile SoC applications. |
| Thermal Resistance | Rth(j-a) = 130 K/W - requires solid copper connections to ground/power planes for safe 150 mA operation at +85 °C ambient. |
Pinout & Package
LD6816CX4/16H,315 is housed in a 0.76 mm × 0.76 mm × 0.47 mm Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch and four solder bumps in 2×2 array. The package is Pb-free, RoHS-compliant, halogen- and antimony-free (dark green).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Supply ground reference | Primary return path for regulator current; must connect to low-impedance ground plane to ensure PSRR and thermal performance. |
| EN (A2) | Enable control input | Active-HIGH logic input (VIH ≥ 1.1 V); drives internal pass transistor gate-no external pull-up required. |
| OUT (B1) | Regulated output | Delivers 1.6 V to load; enters high-ohmic (3-state) mode when EN is LOW-prevents backfeeding or leakage into powered-down domains. |
| IN (B2) | Input supply connection | Accepts 2.3 V to 5.5 V input; 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 enables single-cell Li-ion (2.8–4.2 V) or dual-cell NiMH operation down to 1.645 V input. |
| Low-noise regulation | 30 µVRMS noise supports precision analog blocks without requiring additional filtering stages. |
| Fast enable/disable timing | 150 µs start-up and 300 µs shutdown allow tight power sequencing control in multi-rail SoC platforms. |
| High-ohmic disable state | Isolates output from load during sleep-eliminates reverse current and preserves battery charge in always-off subsystems. |
| Integrated protection | Thermal shutdown (160 °C), current limit (600 mA), and 10 kV HBM ESD protect against board-level stress events. |
Applications
| Smartphone Application Processor Core Rail | Digital Still Camera Image Sensor Bias |
|---|---|
Use Scenario: Powers 1.6 V I/O or auxiliary core domain of application processor during active and low-power states. IC Role / Device Role / Timing Role: Primary low-noise, fast-response LDO delivering stable 1.6 V from shared system rail. Use Value: 45 mV dropout extends battery runtime; 150 µs start-up meets processor wake latency requirements. |
Use Scenario: Supplies clean 1.6 V bias to CMOS image sensor analog front-end during capture and preview modes. IC Role / Device Role / Timing Role: Low-noise voltage source decoupling sensor from noisy digital supply domains. Use Value: 30 µVRMS noise prevents fixed-pattern noise in captured images; high-ohmic disable prevents sensor leakage during idle. |
| Portable Media Player Audio Codec Supply | Personal Navigation Device GPS Baseband IC |
Use Scenario: Provides regulated 1.6 V to audio codec's analog section in battery-powered MP3/WMA playback devices. IC Role / Device Role / Timing Role: Dedicated LDO isolating sensitive audio circuitry from digital switching noise. Use Value: 55 dB PSRR at 1 kHz rejects ripple from DC-DC converters; ±3% accuracy maintains THD+N spec across temperature. |
Use Scenario: Supplies 1.6 V to GPS baseband IC's low-power logic and RF interface in handheld navigation units. IC Role / Device Role / Timing Role: Enable-controlled LDO supporting rapid GPS cold-start and deep-sleep wake cycles. Use Value: 0.1 µA shutdown current minimizes battery drain during extended GPS-off periods; WLCSP4 footprint saves space in compact form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B162MR-G | 1.6 V fixed, 150 mA, 65 mV dropout (at 100 mA), SOT-25 package (2.9 × 2.8 mm) | Larger footprint and higher dropout reduce suitability for ultra-thin mobile designs with tight input headroom. | Select when board space allows larger SMT package and thermal management via PCB copper is less constrained. |
| Richtek RT9013-16GB | 1.6 V fixed, 150 mA, 250 mV dropout (at 150 mA), DFN-4 (1.0 × 1.0 mm) | Higher dropout limits use with sub-1.85 V inputs; DFN-4 has lower Rth(j-a) (~110 K/W) but no high-ohmic disable. | Choose where thermal performance is prioritized over input voltage margin and output isolation during disable is not required. |
Compared with XC6219B162MR-G and RT9013-16GB, LD6816CX4/16H,315 delivers the lowest dropout and smallest package volume, making it optimal for space-constrained, battery-critical mobile interfaces-but requires careful WLCSP4 reflow process control and lacks integrated pull-down for auto-discharge.
Availability
LD6816CX4/16H,315 is available at Aetrix Electronics and suitable for smartphone power management, portable camera sensor biasing, and GPS baseband IC supply requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LD6816CX4/16H,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 mobile markets.
The LD6816 series was designed specifically for ultra-miniaturized, low-noise power regulation in portable consumer electronics-emphasizing wafer-level packaging, sub-50 mV dropout, and robust enable-controlled sequencing.
FAQ
What is the nominal output voltage and tolerance of LD6816CX4/16H,315?
The LD6816CX4/16H,315 provides a fixed 1.6 V output with ±0.5% tolerance at +25 °C and ±3% over the full operating temperature range of −40 °C to +85 °C. This accuracy is maintained across 1 mA to 150 mA load currents and input voltages from 2.3 V to 5.5 V, as verified in Table 9 of the NXP datasheet Rev. 1.
Does LD6816CX4/16H,315 support auto-discharge functionality?
No, LD6816CX4/16H,315 does not include auto-discharge. It belongs to the 'H' variant family (denoted by 'H' in the part number), which places the output in a high-ohmic (3-state) condition when disabled. Auto-discharge is only available in 'P' and 'CxxP' variants, which integrate a pull-down transistor to actively discharge the output node.
What is the recommended output capacitor for LD6816CX4/16H,315 and why?
The recommended output capacitor for LD6816CX4/16H,315 is a 1.0 µF X7R ceramic capacitor with ESR between 5 mΩ and 500 mΩ. This value ensures loop stability, meets the minimum 0.7 µF requirement, and supports the specified 150 µs start-up time. X7R dielectric guarantees performance across −40 °C to +125 °C, matching the device's full temperature specification.
Can LD6816CX4/16H,315 operate from a 2.0 V input supply?
Yes, LD6816CX4/16H,315 can operate from a 2.0 V input, but only if the load current remains below ~70 mA. At 150 mA, the minimum input is 1.645 V (1.6 V + 45 mV dropout). With 2.0 V input, the maximum sustainable load is determined by the dropout curve: Figure 7 shows Vdo ≈ 30 mV at 100 mA and ≈ 20 mV at 50 mA, confirming safe operation at 2.0 V up to ~120 mA per datasheet characterization.
What is the thermal resistance and maximum power dissipation of LD6816CX4/16H,315?
LD6816CX4/16H,315 has a typical junction-to-ambient thermal resistance (Rth(j-a)) of 130 K/W under standard two-layer PCB conditions. Its absolute maximum total power dissipation is 770 mW (Table 6), but practical continuous dissipation at +85 °C ambient is limited to ~200 mW due to thermal derating-corresponding to ~125 mA at 1.6 V output with 2.3 V input (ΔV = 0.7 V).
LD6816CX4/16H,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.6V
- 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)
LD6816CX4/16H,315 FAQ
1.How can I place an order for LD6816CX4/16H,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/16H,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 LD6816CX4/16H,315 reliable?
The price and inventory of LD6816CX4/16H,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6816CX4/16H,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/16H,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/16H,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/16H,315?
LD6816CX4/16H,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/16H,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 LD6816CX4/16H,315?
For technical support, including LD6816CX4/16H,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/16H,315 requirements.
6.How does Aetrix verify that LD6816CX4/16H,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/16H,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 LD6816CX4/16H,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/16H,315?
All LD6816CX4/16H,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/16H,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 LD6816CX4/16H,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/16H,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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