NXP Semiconductors LD6836CX4/28H,315

Overview

LD6836CX4/28H,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 × 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 LD6836CX4/28H,315 datasheet, LD6836CX4/28H,315 pinout, LD6836CX4/28H,315 application, or LD6836CX4/28H,315 equivalent, key selection criteria include its 2.3–5.5 V input range, 55 dB PSRR at 1 kHz, 150 µs startup time, thermal shutdown at 160 °C, and compatibility with 0.7–1.0 µF X7R ceramic output capacitors.

Technical Context

The LD6836CX4/28H,315 implements a PMOS pass transistor architecture enabling ultra-low dropout operation, with internal voltage reference and error amplifier delivering tight output regulation across –40 °C to +85 °C ambient. Its enable input (active HIGH, VIH ≥ 1.1 V) controls high-ohmic output state during shutdown, eliminating external discharge circuitry.

Designed for low-noise analog and digital subsystems, it integrates over-temperature protection (160 °C trip, 20 K hysteresis), output current limiting (~600 mA short-circuit), and 10 kV HBM ESD protection. The WLCSP4 package supports fine-pitch PCB assembly with reflow-compatible solder land pattern and no lead-free compliance restrictions.

Key Specifications

Pinout & Package

LD6836CX4/28H,315 uses a 4-bump Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch, dimensions 0.76 mm × 0.76 mm × 0.47 mm, and laser-marked pin A1 index area. Bump layout is 2×2 grid (A1, A2, B1, B2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LD6836CX4/28P, LD6836CX4/28H,315 provides superior isolation during disable; compared with TPS7A0528DSGR, it delivers higher current, lower dropout, and lower noise - critical for demanding portable SoC power domains.

Availability

LD6836CX4/28H,315 is available at Aetrix Electronics and suitable for smartphone baseband power, digital camera sensor rails, portable media player audio codecs, and wearable health monitor MCU cores requiring stable component supply with guaranteed long-term availability.

Supply support for LD6836CX4/28H,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 electronics.

The LD6836 series was developed specifically for miniaturized portable electronics, emphasizing ultra-low dropout, low noise, and wafer-level packaging to meet stringent space and power-efficiency requirements in smartphones and wearables.

FAQ

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

The LD6836CX4/28H,315 delivers a fixed 2.8 V output with ±3 % accuracy over –40 °C to +85 °C ambient temperature and 1–300 mA load range. This tolerance ensures reliable operation for baseband processors and image sensors requiring tightly regulated supply rails. The LD6836CX4/28H,315 achieves this via precision internal voltage reference and feedback network trimming during wafer test.

Does the LD6836CX4/28H,315 require an external output capacitor, and what type is recommended?

Yes, the LD6836CX4/28H,315 requires a minimum 0.7 µF X7R ceramic capacitor at the OUT pin, with ESR between 5–500 mΩ, placed within 2 mm of the WLCSP4 bumps. A 1.0 µF X7R capacitor is recommended for optimal transient response and PSRR performance. The LD6836CX4/28H,315 is unstable with low-ESR tantalum or polymer capacitors.

How does the enable functionality work on the LD6836CX4/28H,315?

The LD6836CX4/28H,315 features an active-HIGH enable input (EN) with VIH ≥ 1.1 V and VIL ≤ 0.4 V, compatible with 1.8 V and 3.3 V logic families. When EN is LOW, the device enters shutdown mode drawing only 0.1 µA and places the OUT pin in a high-ohmic (3-state) condition. The LD6836CX4/28H,315 has no internal pull-up on EN - external logic must drive it.

What thermal considerations apply to the LD6836CX4/28H,315 in a compact PCB layout?

The LD6836CX4/28H,315 has a junction-to-ambient thermal resistance of 130 K/W. To maintain safe operation at 300 mA, ensure GND bump connects directly to ≥100 mm² internal ground plane via multiple vias, avoid solder mask over thermal pads, and limit ambient temperature to ≤85 °C. Derate output current above 85 °C per thermal characteristics table.

Is the LD6836CX4/28H,315 RoHS-compliant and halogen-free?

Yes, the LD6836CX4/28H,315 is fully RoHS-compliant, lead-free, and halogen- and antimony-free (NXP "dark green" compliance). It meets JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1) and supports standard lead-free reflow profiles up to 260 °C peak temperature.