NXP Semiconductors LD6836CX4/33H,315

Overview

LD6836CX4/33H,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 (0.76 × 0.76 × 0.47 mm), featuring 90 mV dropout at full load, 30 µV_RMS output noise (10 Hz–100 kHz), and high-ohmic (3-state) output during disable - designed for power-sensitive portable applications including smartphone baseband ICs and camera sensor rails.

For engineers reviewing the LD6836CX4/33H,315 datasheet, LD6836CX4/33H,315 pinout, LD6836CX4/33H,315 application, or LD6836CX4/33H,315 equivalent, key selection criteria include its 2.3–5.5 V input range, 150 µs startup time, 55 dB PSRR at 1 kHz, ±0.5% output accuracy at +25°C, and thermal shutdown at 160°C - all validated for miniaturized mobile power domains.

Technical Context

The LD6836CX4/33H,315 implements a PMOS pass transistor architecture enabling ultra-low dropout operation with minimal headroom dependency on load current. Its internal bandgap reference and error amplifier deliver tight regulation across −40°C to +85°C ambient, while integrated over-temperature and output current limiting ensure robust fault protection without external components.

As a high-ohmic output variant ('H' suffix), it disconnects the output via an open-drain-like state when disabled - eliminating leakage paths and preserving downstream bias integrity. The device requires only a single 1 µF X7R ceramic capacitor on OUT for stability and supports active-HIGH enable control with 0.4 V V_IL and 1.1 V V_IH thresholds independent of input voltage.

Key Specifications

Pinout & Package

LD6836CX4/33H,315 uses a 4-bump Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch and footprint 0.76 mm × 0.76 mm. Solder bumps are arranged in a 2×2 grid; bump A1 is marked by an index area on the die surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B332MR-G and RT9013-33GB, LD6836CX4/33H,315 delivers superior dropout performance, integrated ESD hardening, and true 3-state disable - making it optimal for space-constrained, battery-operated, and ESD-prone portable electronics where reliability and miniaturization are primary constraints.

Availability

LD6836CX4/33H,315 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor rails, portable media player audio, and personal navigation device GPS applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LD6836CX4/33H,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 mobile markets, with deep expertise in power management and mixed-signal ICs.

The LD6836 series was engineered specifically for ultra-miniaturized portable electronics - delivering ultra-low dropout, low noise, and high integration in wafer-level packages to meet aggressive size and efficiency targets in smartphones and wearables.

FAQ

What is the maximum input voltage rating for LD6836CX4/33H,315?

The absolute maximum input voltage for LD6836CX4/33H,315 is +6.0 V for up to 4 ms transients, with recommended continuous operation between 2.3 V and 5.5 V. Exceeding 6.0 V risks permanent damage to the internal PMOS pass transistor and reference circuitry. For sustained operation, staying within the 2.3–5.5 V range ensures compliance with all electrical characteristics in the datasheet, including dropout, PSRR, and load regulation.

Does LD6836CX4/33H,315 require an input capacitor?

Yes, LD6836CX4/33H,315 requires an external input capacitor of 0.7–1.0 µF (X7R ceramic, ±30% tolerance) placed as close as possible to the IN pin. This capacitor stabilizes the input supply against transient current demands and prevents oscillation due to source impedance. Without it, the regulator may exhibit instability or degraded PSRR, especially when fed from high-impedance sources like battery protection circuits or long PCB traces.

What is the meaning of the 'H' suffix in LD6836CX4/33H,315?

The 'H' suffix in LD6836CX4/33H,315 denotes the high-ohmic (3-state) output configuration: when the EN pin is driven LOW, the output disconnects completely - presenting a high-impedance state rather than pulling low. This prevents back-current flow into the LDO and avoids unintended powering of downstream circuits, which is essential for power-domain isolation in multi-rail portable systems.

Can LD6836CX4/33H,315 be used with a 1.8 V enable signal?

Yes, LD6836CX4/33H,315 is fully compatible with 1.8 V GPIOs: its enable input has V_IH = 1.1 V (min) and V_IL = 0.4 V (max), so a 1.8 V logic HIGH exceeds the threshold by >0.7 V margin. No level shifter is needed. The enable threshold is supply-independent, ensuring reliable turn-on even as input voltage varies from 2.3 V to 5.5 V.

Is LD6836CX4/33H,315 RoHS-compliant and halogen-free?

Yes, LD6836CX4/33H,315 is Pb-free, RoHS-compliant, and fully halogen- and antimony-free - meeting NXP's "dark green" environmental standard. This certification applies to both the silicon die and the WLCSP4 package materials, ensuring compliance with global environmental regulations including EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity Level 1 handling requirements.