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NXP Semiconductors LD6816CX4/C13P,315
- Part No.:
- LD6816CX4/C13P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
LD6816CX4/C13P,315.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:36,000
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Product details
Overview
LD6816CX4/C13P,315 from NXP Semiconductors is a 1.3 V fixed-output, 150 mA ultra-low-dropout linear regulator in WLCSP4 package (0.76 mm × 0.76 mm × 0.47 mm), 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 low-voltage analog/digital circuitry in space-constrained portable devices.
For engineers reviewing the LD6816CX4/C13P,315 datasheet, LD6816CX4/C13P,315 pinout, LD6816CX4/C13P,315 application, or LD6816CX4/C13P,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/C13P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout (45 mV @ 150 mA) and fast start-up (<150 µs). Its enable input (EN) is active-HIGH with VIH ≥1.1 V and VIL ≤0.4 V, and it integrates thermal shutdown (160 °C) and current limiting (600 mA short-circuit).
Unlike high-ohmic disable variants (e.g., /xxH), this /CxxP version includes an on-chip pull-down transistor (Rpd = 100 Ω typical) that actively discharges the output during shutdown-critical for systems requiring rapid rail collapse and leakage control in battery-powered standby modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.3 V ±3% over −40 °C to +85 °C ambient; ensures stable core/bias supply for 1.3 V logic or analog blocks. |
| Dropout voltage | 45 mV typical at 150 mA load; enables operation with VIN as low as 1.345 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 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 during system sleep states. |
| Enable threshold | VIH = 1.1 V min, VIL = 0.4 V max; compatible with 1.8 V/3.3 V GPIO without level-shifting. |
| Package | WLCSP4 (0.4 mm pitch, 0.76 mm × 0.76 mm); enables direct die-on-PCB integration in ultra-thin mobile modules. |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP4), 0.4 mm pitch, dimensions 0.76 mm × 0.76 mm × 0.47 mm, Pb-free/RoHS/halogen-free compliant.
| 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 maintain PSRR and thermal performance. |
| EN (A2) | Active-HIGH enable input | Drives internal bandgap and pass transistor; pulled LOW disables regulator and activates auto-discharge transistor. |
| OUT (B1) | Regulated output voltage | Delivers 1.3 V to load; requires ≥1.0 µF X7R ceramic capacitor (ESR 5–500 mΩ) for stability and controlled discharge timing. |
| IN (B2) | Input voltage supply | Accepts 2.3–5.5 V; must be filtered upstream to meet PSRR performance; sensitive to trace inductance due to high-frequency noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor actively discharges OUT to <10% VOUT in ≤300 µs, eliminating hold-up voltage in power sequencing. |
| Ultra-low noise regulation | 30 µVRMS output noise enables clean power for precision analog sensors, audio codecs, and RF front-end biasing without additional filtering. |
| Thermal & current protection | 160 °C thermal shutdown with 20 K hysteresis and 600 mA short-circuit limit prevent damage during overload or PCB thermal runaway. |
| Low quiescent current | 0.1 µA shutdown current extends battery life in always-on IoT nodes and wearable sleep-mode applications. |
| Miniaturized WLCSP | 0.76 mm × 0.76 mm footprint saves >70% board area vs. SOT-23, critical for camera modules and compact SIM card readers. |
Applications
| Smartphone Application Processor Core Rail | Digital Still Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering 1.3 V CPU/GPU cores in multi-core application processors during dynamic DVFS scaling. IC Role / Device Role / Timing Role: Primary low-noise, fast-transient LDO delivering regulated 1.3 V with sub-150 µs start-up to meet processor wake-up latency requirements. Use Value: Ultra-low dropout preserves battery headroom; 30 µVRMS noise prevents digital switching artifacts from corrupting core logic timing margins. |
Use Scenario: Supplying analog bias voltage to CMOS image sensor pixel arrays and column amplifiers. IC Role / Device Role / Timing Role: Low-noise 1.3 V source decoupled from noisy digital supplies; auto-discharge ensures rapid sensor reset between frames. Use Value: 55 dB PSRR rejects digital switching noise from nearby SoC domains; fast shutdown eliminates ghosting in burst capture mode. |
| Portable Media Player Audio DAC Reference | Bluetooth LE Wearable System-on-Chip I/O Rail |
Use Scenario: Providing ultra-clean 1.3 V reference to stereo DACs in high-fidelity portable audio players. IC Role / Device Role / Timing Role: Precision LDO acting as analog voltage reference source; placed adjacent to DAC to minimize trace noise pickup. Use Value: 30 µVRMS noise directly translates to >100 dB SNR; tight ±3% output tolerance maintains consistent DAC full-scale resolution. |
Use Scenario: Powering 1.3 V I/O banks of Bluetooth 5.x SoCs in compact earbuds and fitness trackers. IC Role / Device Role / Timing Role: Compact, enable-controlled LDO supporting rapid entry/exit from deep-sleep states with controlled rail collapse. Use Value: 0.1 µA shutdown current extends weeks-long battery life; WLCSP4 footprint fits within 3 mm × 3 mm module constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0513PDBVR | 1.3 V fixed, 200 mA, 170 mV dropout @ 200 mA, SOT-23-5 package (2.9 mm × 1.6 mm) | Larger footprint; no auto-discharge; higher dropout reduces usable battery range in single-cell systems. | Select when board space allows larger package and auto-discharge is not required for power sequencing. |
| MCP1804T-1302I/OT | 1.3 V fixed, 150 mA, 230 mV dropout @ 150 mA, SOT-23-5; 45 µVRMS noise | No enable pin or auto-discharge; higher dropout and noise; lacks thermal/current protection. | Choose only for cost-sensitive, non-battery, non-sequencing applications where size and protection are secondary. |
Compared with TPS7A0513PDBVR and MCP1804T-1302I/OT, LD6816CX4/C13P,315 delivers superior battery efficiency via 45 mV dropout, essential rail collapse via auto-discharge, and integrated protection-making it uniquely suited for miniaturized, battery-critical portable designs.
Availability
LD6816CX4/C13P,315 is available at Aetrix Electronics and suitable for smartphone application processor core rails, digital still camera image sensor bias, portable media player audio DAC references, and Bluetooth LE wearable SoC I/O rails requiring stable component supply and long-term lifecycle support.
Supply support for LD6816CX4/C13P,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 electronics.
The LD6816 series was designed specifically for ultra-miniaturized, battery-powered portable electronics-emphasizing ultra-low dropout, low noise, and active discharge to meet stringent power integrity and sequencing demands in smartphones, wearables, and imaging modules.
FAQ
What is the nominal output voltage and tolerance of LD6816CX4/C13P,315?
The LD6816CX4/C13P,315 delivers a fixed 1.3 V output with ±3% tolerance over −40 °C to +85 °C ambient temperature and 1 mA to 150 mA load current. This accuracy is guaranteed across process, voltage, and temperature variations, making LD6816CX4/C13P,315 suitable for powering 1.3 V logic cores and analog bias circuits without external trimming.
Does LD6816CX4/C13P,315 include auto-discharge functionality, and how does it operate?
Yes, LD6816CX4/C13P,315 includes an integrated pull-down transistor that provides low-ohmic output state during disable. When EN is driven LOW, LD6816CX4/C13P,315 actively discharges the OUT pin to <10% of nominal voltage in ≤300 µs with Rpd ≈ 100 Ω-enabling clean power sequencing and eliminating residual charge in portable device standby modes.
What package type and dimensions does LD6816CX4/C13P,315 use?
LD6816CX4/C13P,315 uses a Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch and physical dimensions of 0.76 mm × 0.76 mm × 0.47 mm. The package features four solder bumps in a 2×2 array (A1=GND, A2=EN, B1=OUT, B2=IN) and is RoHS-compliant, halogen-free, and qualified for consumer applications per NX1-00023.
What is the minimum recommended output capacitance for stable operation of LD6816CX4/C13P,315?
The LD6816CX4/C13P,315 requires a minimum 0.7 µF external ceramic output capacitor (X7R dielectric, ±30% tolerance) with ESR between 5 mΩ and 500 mΩ. For optimal transient response and guaranteed stability across temperature, 1.0 µF is recommended-directly impacting shutdown time and noise suppression performance of LD6816CX4/C13P,315.
How does the PSRR of LD6816CX4/C13P,315 compare at different load currents?
LD6816CX4/C13P,315 maintains 55 dB PSRR at 1 kHz under 1 mA load, degrading slightly to ~50 dB at 150 mA due to pass transistor impedance changes. This frequency-dependent rejection is documented in Figures 4–6 of the datasheet and confirms LD6816CX4/C13P,315's suitability for filtering ripple from switching regulators feeding its IN pin across operational load ranges.
LD6816CX4/C13P,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):
- 1.3V
- 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/C13P,315 FAQ
1.How can I place an order for LD6816CX4/C13P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6816CX4/C13P,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/C13P,315 reliable?
The price and inventory of LD6816CX4/C13P,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/C13P,315 is usually 5 days.
3.What payment methods are accepted for LD6816CX4/C13P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6816CX4/C13P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6816CX4/C13P,315?
LD6816CX4/C13P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6816CX4/C13P,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/C13P,315?
For technical support, including LD6816CX4/C13P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6816CX4/C13P,315 requirements.
6.How does Aetrix verify that LD6816CX4/C13P,315 is sourced from the original manufacturer or authorized distributors?
All LD6816CX4/C13P,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/C13P,315 meets industry standards.
7.What is the process for return or replacement of LD6816CX4/C13P,315?
All LD6816CX4/C13P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6816CX4/C13P,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/C13P,315 part is unused and in its original packaging.
Return procedure for LD6816CX4/C13P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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