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NXP Semiconductors LD6836CX4/25P,315
- Part No.:
- LD6836CX4/25P,315
- Manufacturer:
- NXP Semiconductors
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
LD6836CX4/25P,315.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
LD6836CX4/25P,315 from NXP Semiconductors is a 2.5 V fixed-output, 300 mA ultra-low-dropout linear regulator in a 0.4 mm pitch WLCSP4 package (0.76 × 0.76 × 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 (Rpd = 100 Ω). It serves as a precision power supply for noise-sensitive analog rails in portable consumer electronics.
For engineers reviewing the LD6836CX4/25P,315 datasheet, LD6836CX4/25P,315 pinout, LD6836CX4/25P,315 application, or LD6836CX4/25P,315 equivalent, this page delivers verified electrical specs, WLCSP4 terminal mapping, thermal resistance (130 K/W), PSRR (55 dB @ 1 kHz), and validated alternative options for compact, low-noise LDO selection in space-constrained mobile designs.
Technical Context
The LD6836CX4/25P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout operation down to 90 mV at 300 mA, with internal voltage reference, over-temperature shutdown (160 °C), and current limiting (600 mA short-circuit). Its enable input (VEN) has defined thresholds: VIH ≥ 1.1 V (active HIGH), VIL ≤ 0.4 V (disable).
As a member of the LD6836 series' "P" variant family, it integrates a dedicated pull-down switch on the OUT pin to actively discharge output capacitance during disable-critical for fast power-state transitions in battery-powered systems. This distinguishes it functionally and electrically from "H" variants, which enter high-impedance state instead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 2.5 V ±2 % over −40 °C to +85 °C; enables stable biasing of ADCs, RF ICs, and core logic without external feedback. |
| Dropout voltage | 90 mV typical at 300 mA; allows operation with VIN as low as 2.59 V while maintaining regulation-maximizing battery runtime in single-cell Li-ion systems. |
| PSRR | 55 dB @ 1 kHz; suppresses switching noise from upstream DC-DC converters feeding noisy power domains. |
| Output noise | 30 µVRMS (10 Hz–100 kHz); meets stringent requirements for PLLs, audio codecs, and precision sensors. |
| Quiescent current | 0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes leakage current in always-on subsystems. |
| Start-up time | 150 µs to 95 % of 2.5 V; supports rapid wake-up sequences in low-power microcontroller applications. |
| Pull-down resistance | 100 Ω typical; ensures controlled, sub-millisecond discharge of 1 µF output capacitor (tsd = 300 µs). |
Pinout & Package
LD6836CX4/25P,315 uses a 4-bump Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch and footprint 0.76 mm × 0.76 mm. Bumps are arranged in a 2×2 grid; bump A1 is index-marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Supply ground | Primary return path for load current and internal bias; must be connected to low-impedance PCB ground plane. |
| EN | Enable input (active HIGH) | Logic-level control: ≥1.1 V enables regulation; ≤0.4 V disables output and activates pull-down transistor. |
| OUT | Regulated output voltage | Delivers 2.5 V to load; includes integrated 100 Ω pull-down switch for active discharge when disabled. |
| IN | Input voltage supply | Accepts 2.3 V to 5.5 V; requires ≥0.7 µF X7R ceramic input capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated 100 Ω pull-down transistor on OUT pin enables fast, controlled discharge of output capacitance during disable-eliminating need for external bleed resistors. |
| Ultra-low noise output | 30 µVRMS noise (10 Hz–100 kHz) ensures clean power for RF front-ends, high-resolution ADCs, and clock buffers without added filtering. |
| High PSRR at low frequency | 55 dB rejection at 1 kHz mitigates ripple from buck converter switching frequencies and their harmonics, reducing system-level EMI filtering burden. |
| Thermal protection | Over-temperature shutdown at 160 °C with 20 K hysteresis prevents damage during sustained overload or poor PCB thermal design. |
| ESD robustness | 10 kV HBM ESD rating (IEC 61340-3-1) allows safe handling and assembly in standard manufacturing environments without special precautions. |
Applications
| Smartphone Core Logic Supply | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering ARM Cortex-A/M series application processors' I/O or memory interface rails where tight voltage tolerance and fast transient response are required. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout voltage regulator delivering stable 2.5 V to high-speed digital interfaces. Use Value: Enables reliable operation at minimum VIN (2.59 V), extending usable battery range; 150 µs start-up supports dynamic DVFS transitions. | Use Scenario: Supplying bias voltage to CMOS image sensor analog front-end (AFE) blocks sensitive to supply noise and droop. IC Role / Device Role / Timing Role: Low-noise LDO providing regulated 2.5 V for pixel readout circuitry and column amplifiers. Use Value: 30 µVRMS noise prevents fixed-pattern noise (FPN) degradation; auto-discharge ensures clean reset between frames. |
| Portable Media Player Audio DAC | Bluetooth SoC RF Section |
Use Scenario: Powering stereo audio DACs requiring ultra-clean supply to achieve >100 dB SNR performance. IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating DAC analog supply from noisy digital domain. Use Value: 55 dB PSRR rejects digital switching noise from nearby SoC cores; 2.5 V output matches common DAC reference requirements. | Use Scenario: Supplying 2.5 V to Bluetooth radio transceivers (e.g., RF PA bias, LNA, synthesizer VCO) in wearables and earbuds. IC Role / Device Role / Timing Role: Regulator for RF subsystem demanding low phase noise and minimal supply-induced jitter. Use Value: Sub-100 mV dropout preserves headroom under pulsed RF loads; WLCSP4 size fits dense RF module layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LD6836CX4/25H | Same WLCSP4 package and 2.5 V output, but high-impedance (3-state) disable mode-no auto-discharge. | Suitable where output floating is acceptable (e.g., non-critical standby rails); not suitable for fast discharge-critical paths. | Select LD6836CX4/25H only if system does not require active output discharge during disable. |
| Torex XC6210B252MR-G | 2.5 V, 300 mA LDO in USP-4 package (1.2 × 1.6 mm); 120 mV dropout, 40 µVRMS noise, no integrated pull-down. | Larger footprint and higher noise limit use in ultra-compact, noise-sensitive designs; requires external discharge circuit. | Choose XC6210B252MR-G only if WLCSP4 size is not mandatory and board area permits larger package. |
Compared with LD6836CX4/25H and XC6210B252MR-G, LD6836CX4/25P,315 uniquely combines WLCSP4 miniaturization, 2.5 V precision, ultra-low noise, and integrated auto-discharge-making it optimal for space-constrained, fast-wake-up portable systems where output rail control is critical.
Availability
LD6836CX4/25P,315 is available at Aetrix Electronics and suitable for smartphone power management, portable media player audio subsystems, and Bluetooth wearable RF modules requiring stable component supply with guaranteed long-term availability.
Supply support for LD6836CX4/25P,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 specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with leadership in RF, analog, and power management ICs.
The LD6836 series was designed specifically for ultra-compact, low-noise power delivery in portable consumer electronics-including smartphones, digital cameras, and wearables-where miniaturization, efficiency, and signal integrity are paramount.
FAQ
What is the nominal output voltage and tolerance of the LD6836CX4/25P,315?
The LD6836CX4/25P,315 provides a fixed 2.5 V output with ±2 % tolerance over −40 °C to +85 °C ambient temperature and 1 mA load. At 25 °C, the variation is tighter: ±0.5 %. This accuracy eliminates need for external trimming in most portable applications.
Does the LD6836CX4/25P,315 include an auto-discharge function, and how does it work?
Yes, the LD6836CX4/25P,315 includes an integrated pull-down transistor that activates when EN is low, pulling the OUT pin to GND through a typical 100 Ω resistance. This discharges external capacitors rapidly-achieving 10 % of nominal voltage in 300 µs with 1 µF load-enabling clean power sequencing.
What are the recommended input and output capacitor values for stable operation of the LD6836CX4/25P,315?
The LD6836CX4/25P,315 requires a minimum 0.7 µF X7R ceramic capacitor on both IN and OUT pins, with 1.0 µF recommended. ESR must be 5–500 mΩ. These values ensure stability, transient response, and meet the 150 µs start-up specification per the datasheet.
What is the thermal resistance (Rth(j-a)) of the LD6836CX4/25P,315, and how does it affect PCB layout?
The LD6836CX4/25P,315 has a typical junction-to-ambient thermal resistance of 130 K/W on a two-layer PCB. To achieve this, all four bumps must connect to large copper areas-especially GND-and avoid solder-mask coverage under the die. Thermal vias to inner ground planes further reduce effective Rth.
Is the LD6836CX4/25P,315 RoHS-compliant and halogen-free?
Yes, the LD6836CX4/25P,315 is Pb-free, RoHS-compliant, and fully halogen- and antimony-free-meeting NXP's "dark green" compliance standard. It is qualified per NX1-00023 for consumer applications and rated for −40 °C to +85 °C operating ambient temperature.
LD6836CX4/25P,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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)
LD6836CX4/25P,315 FAQ
1.How can I place an order for LD6836CX4/25P,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for LD6836CX4/25P,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 LD6836CX4/25P,315 reliable?
The price and inventory of LD6836CX4/25P,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6836CX4/25P,315 is usually 5 days.
3.What payment methods are accepted for LD6836CX4/25P,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836CX4/25P,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD6836CX4/25P,315?
LD6836CX4/25P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD6836CX4/25P,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 LD6836CX4/25P,315?
For technical support, including LD6836CX4/25P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836CX4/25P,315 requirements.
6.How does Aetrix verify that LD6836CX4/25P,315 is sourced from the original manufacturer or authorized distributors?
All LD6836CX4/25P,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 LD6836CX4/25P,315 meets industry standards.
7.What is the process for return or replacement of LD6836CX4/25P,315?
All LD6836CX4/25P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836CX4/25P,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 LD6836CX4/25P,315 part is unused and in its original packaging.
Return procedure for LD6836CX4/25P,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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