NXP Semiconductors LD6806CX4/20P,315

Overview

LD6806CX4/20P,315 from NXP Semiconductors is a 2.0 V fixed-output, ultra-low-dropout linear regulator in WLCSP4 package (0.76 mm × 0.76 mm), delivering up to 200 mA with 60 mV dropout at full load, 30 µV RMS output noise (10 Hz–100 kHz), and 55 dB PSRR at 1 kHz - designed for power-sensitive mobile handset and media player subsystems requiring fast 200 µs startup and low-ohmic pull-down during disable.

For engineers reviewing the LD6806CX4/20P,315 datasheet, LD6806CX4/20P,315 pinout, LD6806CX4/20P,315 application, or LD6806CX4/20P,315 equivalent, key selection considerations include its 2.0 V fixed output, active-HIGH enable threshold (VIH = 1.4 V min), shutdown quiescent current of 0.1–1.0 µA, thermal shutdown at 160 °C, and integrated 10 kV HBM ESD protection - all within a miniature wafer-level chip-scale package.

Technical Context

The LD6806CX4/20P,315 implements a PMOS pass transistor architecture enabling ultra-low dropout voltage and high PSRR. Its internal reference generator, overcurrent and thermal protection circuits, and dedicated pull-down switch (Rpd = 100 Ω typical) ensure robust operation during enable/disable transitions and fault conditions.

This variant belongs to the LD6806x/xxP subfamily, meaning it actively pulls the output to ground via an internal low-ohmic transistor when disabled - unlike H-suffix variants that enter high-impedance state. It operates across −40 °C to +85 °C ambient and supports input voltages from 2.3 V to 5.5 V.

Key Specifications

Pinout & Package

LD6806CX4/20P,315 uses a 4-bump WLCSP (Wafer-Level Chip-Scale Package) with 0.4 mm pitch and footprint 0.76 mm × 0.76 mm × 0.47 mm. The package is Pb-free, RoHS-compliant, and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LD6806CX4/20H,315, the LD6806CX4/20P,315 provides deterministic output discharge during disable - critical for avoiding latch-up in cascaded logic. Against XC6219B202MR-G, it delivers 2.8× lower dropout, 40% lower noise, and 3× smaller footprint, enabling next-generation wearable integration.

Availability

LD6806CX4/20P,315 is available at Aetrix Electronics and suitable for mobile handset power management, portable media player sensor regulation, and wearable fitness tracker core logic requiring stable component supply, consistent WLCSP packaging, and guaranteed 2.0 V output accuracy.

Supply support for LD6806CX4/20P,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 LD6806 series was developed specifically for space-constrained, battery-powered mobile devices demanding ultra-low-noise, ultra-low-dropout regulation with fast transient response and robust protection - targeting handset, media, and wearable platforms.

FAQ

What is the nominal output voltage of LD6806CX4/20P,315?

The LD6806CX4/20P,315 delivers a fixed 2.0 V output voltage with ±3% tolerance over −40 °C to +85 °C ambient temperature and 1 mA to 200 mA load current. This value is factory-trimmed and does not require external resistors, making LD6806CX4/20P,315 ideal for applications needing precise, stable low-voltage rails without feedback network complexity.

Does LD6806CX4/20P,315 include thermal protection?

Yes, LD6806CX4/20P,315 integrates thermal shutdown protection that activates at 160 °C junction temperature and includes 20 K hysteresis (Tsd(hys)). Once triggered, the device disables output and remains off until junction temperature drops below 140 °C, preventing thermal runaway during sustained overload or poor PCB heat dissipation - a key reliability feature confirmed in the official NXP datasheet.

What is the purpose of the 'P' suffix in LD6806CX4/20P,315?

The 'P' suffix in LD6806CX4/20P,315 denotes the low-ohmic output variant: when the EN pin is driven LOW, an internal 100 Ω pull-down transistor actively discharges the OUT pin to GND. This behavior differs from 'H'-suffix parts (e.g., LD6806CX4/20H,315), which enter high-impedance state. The P-version ensures safe, rapid discharge of output capacitance in systems requiring controlled power sequencing.

What is the recommended output capacitor for LD6806CX4/20P,315?

The LD6806CX4/20P,315 requires a minimum 1.0 µF X7R ceramic capacitor at the OUT pin, with ESR between 5 mΩ and 500 mΩ, to ensure stability and meet dynamic performance specs. The capacitor must maintain ≥0.7 µF minimum capacitance across −40 °C to +125 °C, and its value directly impacts shutdown time (tsd(reg)) - as specified in Section 10.1 of the NXP LD6806_SER datasheet.

Can LD6806CX4/20P,315 operate from a 2.3 V input supply?

Yes, LD6806CX4/20P,315 supports input voltages from 2.3 V to 5.5 V. At 2.3 V input and 200 mA load, the 60 mV typical dropout ensures the output remains regulated at 2.0 V (2.3 V − 0.06 V = 2.24 V > 2.0 V), satisfying the minimum headroom requirement. This makes LD6806CX4/20P,315 suitable for single-cell Li-ion or Li-polymer battery applications across their full discharge curve.