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NXP Semiconductors LD6836CX4/18P,315
- Part No.:
- LD6836CX4/18P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6836CX4/18P,315.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,161
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Product details
Overview
LD6836CX4/18P,315 from NXP Semiconductors is a 1.8 V fixed-output, 300 mA ultra-low-dropout linear regulator in a 0.4 mm pitch WLCSP4 package (0.76 mm × 0.76 mm × 0.47 mm), featuring 90 mV dropout at full load, 30 µVRMS output noise (10 Hz–100 kHz), and auto-discharge functionality via integrated pull-down transistor. It powers core logic rails in space-constrained mobile devices including smartphone application processors and camera sensor interfaces.
For engineers reviewing the LD6836CX4/18P,315 datasheet, LD6836CX4/18P,315 pinout, LD6836CX4/18P,315 application, or LD6836CX4/18P,315 equivalent, key selection criteria include its 1.8 V output accuracy (±0.5% at +25°C), 55 dB PSRR at 1 kHz, 150 µs startup time, and thermal shutdown at 160°C - all critical for battery-powered portable electronics requiring stable low-noise biasing.
Technical Context
The LD6836CX4/18P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout (90 mV @ 300 mA) and high PSRR (55 dB @ 1 kHz) without external compensation. Its enable input (active HIGH, VIH ≥ 1.1 V) controls both regulation and auto-discharge via an internal 100 Ω pull-down switch on the OUT pin when disabled.
Designed for miniaturized portable systems, it operates across 2.3 V–5.5 V input range with ±0.5% output voltage tolerance at +25°C and ±3% over −30°C to +85°C ambient. Integrated ESD protection (10 kV HBM) and over-temperature/over-current protection ensure robustness in handheld applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±0.5% at +25°C; supports precise core voltage for ARM Cortex-A/M series SoCs and image sensors. |
| Dropout Voltage | 90 mV typical at 300 mA; enables >95% efficiency at 2.0 V input, extending battery runtime in single-cell Li-ion systems. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from DC-DC converters feeding the LDO input rail. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz); meets low-noise requirements for RF transceivers and high-speed ADC/DAC reference supplies. |
| Quiescent Current | 0.1 µA typical in shutdown mode; minimizes leakage current in always-on subsystems like real-time clocks. |
| Enable Threshold | VIL ≤ 0.4 V / VIH ≥ 1.1 V; compatible with 1.8 V GPIOs and ensures clean power sequencing in multi-rail designs. |
| Thermal Shutdown | 160°C with 20 K hysteresis; prevents thermal runaway during sustained high-load operation in sealed enclosures. |
Pinout & Package
LD6836CX4/18P,315 uses a 4-bump Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch and footprint 0.76 mm × 0.76 mm. Package height is 0.47 mm (typical), optimized for ultra-thin mobile PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Supply ground | Primary return path for output current and internal bias; must connect to solid ground plane for noise immunity and thermal dissipation. |
| EN | Device enable input (active HIGH) | Controls regulator ON/OFF state and activates auto-discharge; requires ≥1.1 V to enable, ≤0.4 V to disable. |
| OUT | Regulator output voltage | Delivers regulated 1.8 V; includes integrated 100 Ω pull-down transistor to discharge load capacitance when disabled. |
| IN | Regulator input voltage | Accepts 2.3 V–5.5 V input; requires ≥0.7 µF ceramic capacitor (X7R, ESR 5–500 mΩ) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor discharges output capacitance within 300 µs upon disable, preventing floating voltages in multi-rail power sequencing. |
| Ultra-low noise regulation | 30 µVRMS output noise (10 Hz–100 kHz) enables clean supply for RF front-ends and precision analog blocks without additional filtering. |
| High PSRR at low frequency | 55 dB rejection at 1 kHz allows co-location with noisy buck converters, reducing need for separate low-noise power domains. |
| Miniature WLCSP4 package | 0.76 mm × 0.76 mm footprint saves >70% board area vs. SOT23-5, supporting <1.0 mm profile designs in smartphones and wearables. |
| Robust protection suite | Includes over-temperature shutdown (160°C), output current limiting (600 mA short-circuit), and 10 kV HBM ESD protection on all pins. |
Applications
| Smartphone Application Processor Core Rail | Digital Camera Sensor Bias Supply |
|---|---|
|
Use Scenario: Powers 1.8 V I/O and core domains of application processors (e.g., Qualcomm Snapdragon, MediaTek Dimensity) in smartphones with tight thermal and space constraints. IC Role / Device Role / Timing Role: Primary low-noise, fast-response LDO delivering stable 1.8 V under dynamic load transients up to 300 mA. Use Value: 90 mV dropout preserves battery life; 150 µs startup enables rapid processor wake-up; auto-discharge prevents latch-up during sleep/wake transitions. |
Use Scenario: Supplies clean 1.8 V bias to CMOS image sensor I/O interfaces and analog front-ends in compact digital still cameras and mobile phone cameras. IC Role / Device Role / Timing Role: Low-noise voltage regulator isolating sensor analog circuitry from digital switching noise on shared PCB layers. Use Value: 30 µVRMS noise prevents image artifacts; 55 dB PSRR rejects noise from nearby display drivers; WLCSP4 footprint fits behind camera modules. |
| Portable Media Player Audio Codec Supply | Personal Navigation Device GPS Baseband IC |
|
Use Scenario: Provides regulated 1.8 V to audio codec ICs (e.g., TI PCM3168A, Cirrus CS43L22) in battery-powered MP3 players and Bluetooth headphones. IC Role / Device Role / Timing Role: Low-quiescent-current LDO maintaining rail integrity during playback/pause transitions and standby modes. Use Value: 0.1 µA shutdown current extends idle battery life; ±0.5% output accuracy ensures consistent DAC reference performance across temperature. |
Use Scenario: Powers 1.8 V digital baseband processors (e.g., u-blox UBX-M8030, STMicroelectronics Teseo III) in handheld GPS navigation units. IC Role / Device Role / Timing Role: High-PSRR LDO rejecting noise from GPS RF sections and cellular modems sharing the same PCB. Use Value: 55 dB PSRR at 1 kHz prevents GPS signal degradation; thermal shutdown protects against enclosure overheating in sun-exposed automotive mounts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B182MR-G | 1.8 V fixed output, 300 mA, SOT-25 package (2.9 mm × 2.8 mm); 120 mV dropout; no auto-discharge; 45 dB PSRR @ 1 kHz | Larger footprint; lacks pull-down function; lower PSRR limits use in noise-sensitive RF sections | Select when board space permits larger SMT package and auto-discharge is not required for power sequencing. |
| Richtek RT9013-18GJ5 | 1.8 V fixed output, 500 mA, DFN-6 (2.0 mm × 2.0 mm); 150 mV dropout; no auto-discharge; 60 dB PSRR @ 1 kHz | Higher current rating but larger size; no integrated pull-down; higher quiescent current (25 µA active) | Choose for higher load margin in non-miniaturized designs where 500 mA peak current is needed and footprint is less constrained. |
Compared with XC6219B182MR-G and RT9013-18GJ5, LD6836CX4/18P,315 delivers superior miniaturization (0.76 mm² vs. ≥5.6 mm²), essential auto-discharge for modern power sequencing, and best-in-class 90 mV dropout - making it optimal for next-generation portable electronics where board area and dynamic power control are critical.
Availability
LD6836CX4/18P,315 is available at Aetrix Electronics and suitable for smartphone application processors, digital camera sensor interfaces, portable media player audio codecs, and personal navigation device GPS baseband ICs requiring stable component supply with guaranteed long-term availability.
Supply support for LD6836CX4/18P,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 LD6836 series was developed specifically for ultra-miniaturized portable electronics, targeting applications demanding sub-1 mm² packaging, ultra-low noise, and intelligent power management features like auto-discharge.
FAQ
What is the output voltage tolerance of LD6836CX4/18P,315 over temperature?
The LD6836CX4/18P,315 maintains ±3% output voltage tolerance across −30°C to +85°C ambient temperature, with tighter ±0.5% accuracy at +25°C. This ensures reliable operation for 1.8 V logic rails in smartphones and portable media players exposed to varying environmental conditions. The LD6836CX4/18P,315 achieves this via precision internal voltage reference and trimming during wafer test.
Does LD6836CX4/18P,315 require an input capacitor?
Yes, LD6836CX4/18P,315 requires a minimum 0.7 µF X7R ceramic input capacitor (±30% tolerance) placed close to the IN pin to stabilize the input rail and prevent oscillation. The recommended value is 1.0 µF, matching the 1.0 µF output capacitor specified for optimal transient response and PSRR performance. This requirement is explicitly defined in Section 10.1 of the LD6836_SER datasheet.
How does the auto-discharge function work in LD6836CX4/18P,315?
When the EN pin is driven LOW, LD6836CX4/18P,315 activates an internal 100 Ω pull-down transistor between OUT and GND, discharging external load capacitance to 10% of nominal voltage within 300 µs. This prevents floating outputs and unintended device wake-up during power sequencing. The LD6836CX4/18P,315 implements this feature exclusively in /P-suffixed variants, distinguishing it from /H versions.
What is the maximum allowable input voltage for LD6836CX4/18P,315?
The absolute maximum input voltage for LD6836CX4/18P,315 is +6.0 V for 4 ms transients, with recommended continuous operation limited to 2.3 V–5.5 V. Exceeding 5.5 V risks permanent damage due to internal gate oxide stress, especially during hot-plug events. The LD6836CX4/18P,315 datasheet specifies these limits in Table 9 (Limiting Values) under VIN parameter.
Is LD6836CX4/18P,315 RoHS compliant and halogen-free?
Yes, LD6836CX4/18P,315 is fully RoHS compliant and halogen-free (including antimony-free), meeting NXP's "dark green" environmental standard. This compliance is confirmed in Section 1.2 (Features and benefits) of the LD6836_SER datasheet and applies to both WLCSP4 and SOT753 package variants. The LD6836CX4/18P,315 is suitable for consumer electronics sold in EU, China, and other regulated markets.
LD6836CX4/18P,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):
- 1.8V
- 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)
LD6836CX4/18P,315 FAQ
1.How can I place an order for LD6836CX4/18P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836CX4/18P,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 LD6836CX4/18P,315 reliable?
The price and inventory of LD6836CX4/18P,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6836CX4/18P,315 is usually 5 days.
3.What payment methods are accepted for LD6836CX4/18P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836CX4/18P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836CX4/18P,315?
LD6836CX4/18P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836CX4/18P,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 LD6836CX4/18P,315?
For technical support, including LD6836CX4/18P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836CX4/18P,315 requirements.
6.How does Aetrix verify that LD6836CX4/18P,315 is sourced from the original manufacturer or authorized distributors?
All LD6836CX4/18P,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 LD6836CX4/18P,315 meets industry standards.
7.What is the process for return or replacement of LD6836CX4/18P,315?
All LD6836CX4/18P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836CX4/18P,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 LD6836CX4/18P,315 part is unused and in its original packaging.
Return procedure for LD6836CX4/18P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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