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NXP Semiconductors LD6836CX4/C33P,315
- Part No.:
- LD6836CX4/C33P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6836CX4/C33P,315.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
LD6836CX4/C33P,315 from NXP Semiconductors is a 3.3 V fixed-output, 300 mA ultra-low dropout linear regulator in a 0.4 mm pitch WLCSP4 package with auto-discharge (pull-down) functionality. It delivers 90 mV dropout at full load, 30 µV RMS output noise (10 Hz–100 kHz), and 55 dB PSRR at 1 kHz, enabling stable power for noise-sensitive analog rails in space-constrained portable electronics.
For engineers reviewing the LD6836CX4/C33P,315 datasheet, LD6836CX4/C33P,315 pinout, LD6836CX4/C33P,315 application, or LD6836CX4/C33P,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 LD6836CX4/C33P,315 integrates a precision bandgap reference, low-RDS(on) pass transistor, thermal shutdown, and overcurrent protection. Its enable input (active HIGH) controls fast turn-on (150 µs) and active pull-down shutdown (300 µs), while internal ESD protection meets 10 kV HBM.
Designed for miniaturized mobile systems, it operates across 2.3 V–5.5 V input and maintains ±0.5% output accuracy at +25°C with <0.01%/mA load regulation - critical for powering RF transceivers, ADC reference supplies, and low-voltage logic cores where supply ripple and transient response directly impact signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V ±2% over −40°C to +85°C ambient; enables direct replacement of standard 3.3 V logic/IO rails without external feedback. |
| Dropout voltage | 90 mV typical at 300 mA; allows operation down to VIN = 3.39 V, maximizing battery runtime in single-cell Li-ion (3.0–4.2 V) applications. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding sensitive analog circuitry. |
| Output noise | 30 µV RMS (10 Hz–100 kHz); ensures clean biasing for high-resolution ADCs and RF synthesizers without added filtering. |
| Quiescent current | 0.1 µA typical in shutdown mode; reduces system standby power in always-on sensor nodes and IoT edge devices. |
| 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 resistance | Rth(j-a) = 130 K/W (WLCSP4); requires minimal PCB copper area for thermal management in thin-profile handhelds. |
Pinout & Package
LD6836CX4/C33P,315 uses a 0.76 mm × 0.76 mm × 0.51 mm Wafer-Level Chip-Scale Package (WLCSP4) with 4 solder bumps (2×2 array) and backside coating for enhanced mechanical robustness and moisture resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | GND | Primary ground return path; must connect to large PCB ground plane for low-impedance noise rejection and thermal dissipation. |
| A2 | EN | Active-HIGH enable input; drives internal pass transistor; 0.1 µA shutdown current achieved when pulled ≤0.4 V. |
| B1 | OUT | Regulated 3.3 V output; includes integrated pull-down transistor (Rpd = 100 Ω) for rapid discharge during shutdown. |
| B2 | IN | Input supply rail (2.3–5.5 V); requires ≥0.7 µF X7R ceramic capacitor with ESR 5–500 mΩ for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor on OUT pin enables fast discharge (<300 µs to 10% VOUT) for safe power sequencing in multi-rail systems. |
| Low-noise regulation | 30 µV RMS output noise (10 Hz–100 kHz) eliminates need for post-LDO LC filters in audio codec and precision sensor power paths. |
| High PSRR at low frequency | 55 dB rejection at 1 kHz mitigates ripple from buck converter switching frequencies and their harmonics in mixed-signal SoC designs. |
| Ultra-small footprint | 0.76 mm × 0.76 mm WLCSP4 package saves >70% board area vs. SOT753, enabling placement under narrow-bezel displays or stacked PCBs. |
| Robust ESD protection | 10 kV HBM rating allows direct integration into handheld front-end modules without additional TVS diodes. |
Applications
| Smartphone Camera Module | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Powers image signal processor (ISP) and CMOS image sensor analog core requiring clean 3.3 V at up to 250 mA. IC Role / Device Role / Timing Role: Primary LDO for analog sensor biasing and clock distribution; enables sub-100 ns startup for rapid camera wake-up. Use Value: 30 µV RMS noise prevents fixed-pattern noise in raw image data; 90 mV dropout extends usable battery range by 8% in 3.6 V nominal Li-ion systems. |
Use Scenario: Supplies 3.3 V to low-power ECG/PPG analog front-end and Bluetooth LE radio in wearable patch monitors. IC Role / Device Role / Timing Role: Always-on LDO with auto-discharge for safe power cycling between measurement bursts and sleep states. Use Value: 0.1 µA shutdown current extends 2-week battery life; 130 K/W thermal resistance allows operation in sealed plastic enclosures without heatsinks. |
| Digital Still Camera LCD Backlight Driver | Industrial Handheld Scanner |
Use Scenario: Provides regulated 3.3 V to white LED driver IC and touch controller in compact DSLR-style viewfinders. IC Role / Device Role / Timing Role: Secondary LDO decoupling noisy DC-DC outputs; supports fast EN-controlled power gating during display blanking. Use Value: 55 dB PSRR blocks 1 MHz buck converter ripple from modulating LED brightness; 150 µs startup synchronizes with frame-rate timing. |
Use Scenario: Powers 3.3 V logic and laser diode driver in ruggedized barcode scanners subjected to frequent drop impacts. IC Role / Device Role / Timing Role: Miniaturized LDO with backside-coated WLCSP4 package resisting mechanical stress-induced solder joint failure. Use Value: 0.76 mm × 0.76 mm footprint enables placement adjacent to laser diode without compromising shock absorption; RoHS/halogen-free compliance meets industrial safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD6836CX4/33H | Same WLCSP4 package and 3.3 V output, but high-ohmic (3-state) output disable instead of pull-down; no auto-discharge. | Used where output floating during shutdown is acceptable (e.g., non-critical I/O rails); unsuitable for systems requiring rapid discharge. | Select LD6836CX4/33H only if auto-discharge is not required and board layout already accommodates floating outputs. |
| Torex XC6210B332MR-G | 300 mA, 3.3 V fixed LDO in 0.65 mm pitch USP-4 package; 120 mV dropout, 40 µV noise, no integrated pull-down. | Higher dropout and noise limit use in battery-critical or noise-sensitive applications; larger package increases board area by 45%. | Choose XC6210B332MR-G only if WLCSP4 assembly capability is unavailable and 120 mV dropout is acceptable for system voltage margin. |
Compared with LD6836CX4/33H, LD6836CX4/C33P,315 adds essential auto-discharge for safe power sequencing; versus XC6210B332MR-G, it delivers superior noise performance and 30% smaller footprint - both critical for next-generation portable medical and imaging devices.
Availability
LD6836CX4/C33P,315 is available at Aetrix Electronics and suitable for smartphone camera modules, portable medical sensors, digital still camera displays, and industrial handheld scanners requiring stable component supply with guaranteed long-term availability.
Supply support for LD6836CX4/C33P,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 leader specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with deep expertise in power management ICs.
The LD6836 series was designed specifically for ultra-miniaturized portable electronics demanding ultra-low dropout, low noise, and integrated auto-discharge - addressing the power integrity challenges of modern high-density mobile SoCs and sensor subsystems.
FAQ
What is the exact output voltage tolerance of LD6836CX4/C33P,315 over temperature?
The LD6836CX4/C33P,315 delivers 3.3 V output with ±2% tolerance over the full operating range of −40°C to +85°C ambient temperature. At +25°C, the tighter specification is ±0.5%, ensuring precise voltage alignment for 3.3 V logic interfaces and ADC references without external trimming. This accuracy is maintained regardless of input voltage variation between 2.3 V and 5.5 V.
Does LD6836CX4/C33P,315 require an input capacitor, and what value is recommended?
Yes, LD6836CX4/C33P,315 requires an external input capacitor for stability and input ripple suppression. The datasheet specifies a minimum of 0.7 µF with ±30% tolerance, using X7R dielectric to ensure performance across −40°C to +125°C. A 1.0 µF X7R capacitor is recommended for optimal transient response and noise reduction, especially when powered from noisy DC-DC sources.
How does the auto-discharge function of LD6836CX4/C33P,315 operate during shutdown?
When the EN pin is driven LOW, LD6836CX4/C33P,315 activates an internal 100 Ω pull-down transistor on the OUT pin, discharging the output capacitance to 10% of nominal voltage within 300 µs (typical). This prevents floating voltages that could cause latch-up in downstream logic and enables safe, controlled power sequencing in multi-rail systems - a key differentiator from high-ohmic disable variants like LD6836CX4/33H.
What is the thermal performance of LD6836CX4/C33P,315 on a standard two-layer PCB?
On a standard two-layer PCB per JEDEC JESD51-2, LD6836CX4/C33P,315 exhibits a junction-to-ambient thermal resistance (Rth(j-a)) of 130 K/W. With 300 mA output at 3.3 V and 5.5 V input, power dissipation is ~0.66 W; this results in a ~86°C junction rise above ambient - well within the +125°C absolute maximum rating. Performance improves significantly with internal ground/power planes and thermal vias.
Is LD6836CX4/C33P,315 compatible with lead-free reflow soldering processes?
Yes, LD6836CX4/C33P,315 is qualified for lead-free reflow soldering per J-STD-020C. Its WLCSP4 package falls under the "< 2.5 mm thickness, < 350 mm³ volume" category, requiring a peak reflow temperature of 235°C. The backside coating enhances reliability during thermal cycling, and the device meets MSL Level 1 (unlimited floor life) when stored per NXP packaging specifications.
LD6836CX4/C33P,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 4-XFBGA, 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.16V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 250 µA
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.76x0.76)
LD6836CX4/C33P,315 FAQ
1.How can I place an order for LD6836CX4/C33P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836CX4/C33P,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 LD6836CX4/C33P,315 reliable?
The price and inventory of LD6836CX4/C33P,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6836CX4/C33P,315 is usually 5 days.
3.What payment methods are accepted for LD6836CX4/C33P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836CX4/C33P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836CX4/C33P,315?
LD6836CX4/C33P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836CX4/C33P,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 LD6836CX4/C33P,315?
For technical support, including LD6836CX4/C33P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836CX4/C33P,315 requirements.
6.How does Aetrix verify that LD6836CX4/C33P,315 is sourced from the original manufacturer or authorized distributors?
All LD6836CX4/C33P,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 LD6836CX4/C33P,315 meets industry standards.
7.What is the process for return or replacement of LD6836CX4/C33P,315?
All LD6836CX4/C33P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836CX4/C33P,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 LD6836CX4/C33P,315 part is unused and in its original packaging.
Return procedure for LD6836CX4/C33P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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