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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

NXP Semiconductors LD6836CX4/28P,315

Name: LD6836CX4/28P,315
Brand: NXP Semiconductors
SKU: LD6836CX4/28P,315
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LD6836CX4/28P,315

Manufacturer:: NXP Semiconductors

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 4-XFBGA, WLCSP

Datasheet:: LD6836CX4/28P,315.pdf

Description:: IC REG LINEAR 2.8V 300MA 4WLCSP

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Product details

Overview

LD6836CX4/28P,315 from NXP Semiconductors is a 2.8 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 µV_RMS output noise (10 Hz–100 kHz), and integrated auto-discharge (pull-down) functionality for rapid output discharge during disable. It serves as a precision power rail for low-voltage analog/digital circuitry in space-constrained portable electronics.

For engineers reviewing the LD6836CX4/28P,315 datasheet, LD6836CX4/28P,315 pinout, LD6836CX4/28P,315 application, or LD6836CX4/28P,315 equivalent, this page delivers verified electrical specs, WLCSP4 terminal mapping, thermal and noise performance data, real-world use cases in mobile devices, and validated alternative parts with functional and application-level distinctions.

Technical Context

The LD6836CX4/28P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout (90 mV typ. at 300 mA) and high PSRR (−55 dB at 1 kHz). Its enable input (active HIGH, VIH ≥ 1.1 V) controls operation with 150 µs startup time and integrates over-temperature shutdown (160 °C) and current limiting (600 mA short-circuit).

As a pull-down variant ('P' suffix), it includes an internal 100 Ω output-stage switching transistor that actively discharges the output to ground upon disable-critical for systems requiring fast rail collapse and leakage control. The device operates across −40 °C to +85 °C ambient and supports stable regulation with 0.7–1.0 µF X7R ceramic output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	Fixed 2.8 V ±3% over −30 °C to +85 °C; ensures stable bias for 2.8 V logic, RF front-ends, or sensor interfaces without external feedback.
Dropout voltage	90 mV typical at 300 mA; enables regulation from 2.89 V input, maximizing battery runtime in single-cell Li-ion (2.9–4.2 V) or Li-polymer systems.
PSRR	−55 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters, preserving signal integrity in ADCs and audio codecs.
Output noise	30 µV_RMS (10 Hz–100 kHz); low enough for noise-sensitive analog rails (e.g., PLL VCO supplies, precision op-amp references).
Quiescent current	0.1 µA typical in shutdown (VEN ≤ 0.4 V); minimizes standby power loss in always-on subsystems like RTC or wake-up controllers.
Enable threshold	VIL ≤ 0.4 V / VIH ≥ 1.1 V; compatible with 1.8 V and 3.3 V GPIOs without level-shifting, simplifying host MCU interface design.
Pull-down resistance	100 Ω typical; discharges 1 µF load to 10% of 2.8 V in ≤300 µs, meeting fast-power-down requirements in mobile SoC power sequencing.

Pinout & Package

LD6836CX4/28P,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 (laser-marked 'Q' per Table 15 for 2.8 V P-version).

Pin/Terminal	Circuit Role	Design Meaning
GND	Supply ground reference	Primary return path for load current and internal bias; must connect to low-impedance ground plane to maintain PSRR and thermal stability.
EN	Active-HIGH enable input	Controls regulator state; driven HIGH (>1.1 V) to enable output; pulled LOW (<0.4 V) to disable and activate auto-discharge.
OUT	Regulated output voltage	Delivers 2.8 V to load; requires 0.7–1.0 µF X7R ceramic capacitor with ESR 5–500 mΩ for stability and transient response.
IN	Input voltage supply	Accepts 2.3–5.5 V; must be decoupled with ≥0.7 µF ceramic capacitor close to IN pin to suppress input ripple and prevent oscillation.

Key Features

Feature	Design Value
Ultra-low dropout	90 mV at 300 mA enables operation from near-output input voltages, extending usable battery range in portable devices.
Auto-discharge function	Integrated 100 Ω pull-down transistor ensures rapid, controlled output discharge on disable-eliminating need for external bleed resistors.
Low-noise regulation	30 µV_RMS output noise supports clean power for RF ICs, high-resolution ADCs, and precision analog sensors without added filtering.
High PSRR	−55 dB at 1 kHz rejects noise from noisy switchers, reducing need for additional LC filtering stages and PCB area.
Robust protection	Includes over-temperature shutdown (160 °C, 20 K hysteresis) and current limiting (600 mA), preventing damage during fault conditions.

Applications

Smartphone Baseband Power	Digital Camera Image Sensor Bias
Use Scenario: Supplies 2.8 V to baseband processor I/O banks and memory interfaces in LTE/5G smartphones where input voltage varies from 2.9 V (low battery) to 4.2 V (full charge). IC Role / Device Role / Timing Role: Low-noise, fast-response LDO providing stable core voltage during burst-mode data transmission and sleep-state transitions. Use Value: 90 mV dropout preserves >95% of battery energy at end-of-discharge; 150 µs startup meets 3GPP timing requirements for rapid network reacquisition.	Use Scenario: Powers CMOS image sensor analog front-end (AFE) and column ADC in compact digital still cameras with tight board space constraints. IC Role / Device Role / Timing Role: Precision 2.8 V rail generator with ultra-low noise to minimize fixed-pattern noise and improve SNR in low-light imaging. Use Value: 30 µV_RMS noise directly reduces temporal noise floor; 0.76 mm × 0.76 mm WLCSP4 enables placement adjacent to sensor die for minimal trace inductance.
Portable Media Player Audio Codec	Personal Navigation Device GPS Front-End
Use Scenario: Delivers clean 2.8 V to stereo audio codec DACs and headphone amplifiers in MP3 players, where EMI from display and storage must not corrupt audio output. IC Role / Device Role / Timing Role: Low-ESR, low-noise LDO isolating sensitive analog audio paths from noisy digital subsystems. Use Value: −55 dB PSRR attenuates 1 MHz switching noise from display DC-DC by >300×; auto-discharge prevents pop/click during playback pause.	Use Scenario: Provides regulated 2.8 V to GPS/GNSS RF front-end LNA and downconverter in handheld navigation units operating from single-cell Li-ion. IC Role / Device Role / Timing Role: High-PSRR, low-noise LDO ensuring minimal phase noise degradation in GPS receiver chain. Use Value: 90 mV dropout allows continuous operation down to 2.89 V input-extending usable battery life by ~12% versus 150 mV-dropout alternatives.

Smartphone Baseband Power

Digital Camera Image Sensor Bias

Use Scenario: Supplies 2.8 V to baseband processor I/O banks and memory interfaces in LTE/5G smartphones where input voltage varies from 2.9 V (low battery) to 4.2 V (full charge).

IC Role / Device Role / Timing Role: Low-noise, fast-response LDO providing stable core voltage during burst-mode data transmission and sleep-state transitions.

Use Value: 90 mV dropout preserves >95% of battery energy at end-of-discharge; 150 µs startup meets 3GPP timing requirements for rapid network reacquisition.

Use Scenario: Powers CMOS image sensor analog front-end (AFE) and column ADC in compact digital still cameras with tight board space constraints.

IC Role / Device Role / Timing Role: Precision 2.8 V rail generator with ultra-low noise to minimize fixed-pattern noise and improve SNR in low-light imaging.

Use Value: 30 µV_RMS noise directly reduces temporal noise floor; 0.76 mm × 0.76 mm WLCSP4 enables placement adjacent to sensor die for minimal trace inductance.

Portable Media Player Audio Codec

Personal Navigation Device GPS Front-End

Use Scenario: Delivers clean 2.8 V to stereo audio codec DACs and headphone amplifiers in MP3 players, where EMI from display and storage must not corrupt audio output.

IC Role / Device Role / Timing Role: Low-ESR, low-noise LDO isolating sensitive analog audio paths from noisy digital subsystems.

Use Value: −55 dB PSRR attenuates 1 MHz switching noise from display DC-DC by >300×; auto-discharge prevents pop/click during playback pause.

Use Scenario: Provides regulated 2.8 V to GPS/GNSS RF front-end LNA and downconverter in handheld navigation units operating from single-cell Li-ion.

IC Role / Device Role / Timing Role: High-PSRR, low-noise LDO ensuring minimal phase noise degradation in GPS receiver chain.

Use Value: 90 mV dropout allows continuous operation down to 2.89 V input-extending usable battery life by ~12% versus 150 mV-dropout alternatives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LD6836CX4/28H	Same WLCSP4 package and 2.8 V output, but high-ohmic (3-state) output on disable-no auto-discharge.	Suitable where output must float during shutdown (e.g., shared-bus systems), but unsuitable when rapid rail collapse is required.	Select LD6836CX4/28H only if system design explicitly prohibits output discharge; otherwise LD6836CX4/28P,315 is preferred for power sequencing control.
Torex XC6210B282MR-G	2.8 V, 300 mA WLCSP (0.8 mm × 0.8 mm), 150 mV dropout, 45 dB PSRR at 1 kHz, no integrated pull-down.	Larger footprint (0.8 mm vs. 0.76 mm), higher dropout reduces battery efficiency; requires external discharge circuit for equivalent functionality.	Use XC6210B282MR-G only if NXP's LD6836CX4/28P,315 is unavailable; expect 5% lower runtime and added BOM cost for external discharge resistor.

Compared with LD6836CX4/28H and XC6210B282MR-G, the LD6836CX4/28P,315 uniquely combines minimal footprint, lowest dropout, highest PSRR, and integrated auto-discharge-making it optimal for battery-powered portable designs demanding both efficiency and precise power sequencing.

Availability

LD6836CX4/28P,315 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera image sensor bias, portable media player audio codec supply, and personal navigation device GPS front-end applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LD6836CX4/28P,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 markets, with leadership in power management, RF, and embedded processing.

The LD6836 series was designed specifically for ultra-miniaturized, low-noise, high-efficiency power regulation in portable electronics-addressing the demand for smaller footprints, longer battery life, and cleaner analog rails in smartphones, wearables, and IoT edge devices.

FAQ

What is the nominal output voltage and tolerance of the LD6836CX4/28P,315?

The LD6836CX4/28P,315 provides a fixed 2.8 V output with ±3% tolerance over −30 °C to +85 °C ambient temperature. This accuracy is guaranteed under 1 mA load and accounts for line, load, and temperature variations as specified in Table 12 of the NXP datasheet. The '28' in the part number explicitly denotes the 2.8 V output version.

Does the LD6836CX4/28P,315 include auto-discharge functionality, and how does it work?

Yes, the LD6836CX4/28P,315 includes integrated auto-discharge via an internal 100 Ω pull-down transistor on the OUT pin. When the EN pin is driven LOW (<0.4 V), the regulator disables and actively pulls the output to ground, discharging a 1 µF load to 10% of 2.8 V within 300 µs. This eliminates external discharge components and ensures safe, fast power-down sequencing.

What are the recommended external capacitors for stable operation of the LD6836CX4/28P,315?

The LD6836CX4/28P,315 requires a minimum 0.7 µF X7R ceramic capacitor on the OUT pin (typical 1.0 µF), with ESR between 5 mΩ and 500 mΩ, and a ≥0.7 µF ceramic capacitor on the IN pin. These values ensure loop stability, adequate transient response, and compliance with the device's dynamic behavior as characterized in Figures 13–16 of the datasheet.

What is the thermal resistance and maximum power dissipation of the LD6836CX4/28P,315 in its WLCSP4 package?

The LD6836CX4/28P,315 has a typical junction-to-ambient thermal resistance (R_th(j-a)) of 130 K/W on a standard two-layer PCB. Its absolute maximum total power dissipation is 770 mW at T_amb = 25 °C. Derating is required above 25 °C ambient-e.g., at 85 °C ambient, max dissipation drops to ~450 mW based on the 130 K/W thermal coefficient.

How does the LD6836CX4/28P,315 compare to the SOT753-packaged LD6836TD/28P in terms of performance and layout?

The LD6836CX4/28P,315 and LD6836TD/28P share identical electrical specs (2.8 V, 300 mA, 90/100 mV dropout), but differ critically in package: WLCSP4 (0.76 mm × 0.76 mm) vs. SOT753 (3.1 mm × 2.7 mm). The LD6836CX4/28P,315 saves >95% board area and enables direct placement under SoCs or sensors, while the SOT753 offers easier manual assembly and higher thermal mass for higher-power scenarios.

LD6836CX4/28P,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):: 2.8V

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)

LD6836CX4/28P,315 FAQ

1.How can I place an order for LD6836CX4/28P,315 through Aetrix?

Please submit a Request for Quotation (RFQ) for LD6836CX4/28P,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 LD6836CX4/28P,315 reliable?

The price and inventory of LD6836CX4/28P,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD6836CX4/28P,315 is usually 5 days.

3.What payment methods are accepted for LD6836CX4/28P,315?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD6836CX4/28P,315 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD6836CX4/28P,315?

LD6836CX4/28P,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD6836CX4/28P,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 LD6836CX4/28P,315?

For technical support, including LD6836CX4/28P,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD6836CX4/28P,315 requirements.

6.How does Aetrix verify that LD6836CX4/28P,315 is sourced from the original manufacturer or authorized distributors?

All LD6836CX4/28P,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 LD6836CX4/28P,315 meets industry standards.

7.What is the process for return or replacement of LD6836CX4/28P,315?

All LD6836CX4/28P,315 units undergo pre-shipment inspection (PSI). If there is an issue with LD6836CX4/28P,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 LD6836CX4/28P,315 part is unused and in its original packaging.

Return procedure for LD6836CX4/28P,315:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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